From a5aeef3e2700e669c07b1709afeda1b3202f2760 Mon Sep 17 00:00:00 2001
From: Moritz <moritz.m@local-it.org>
Date: Thu, 27 Nov 2025 21:30:06 +0100
Subject: [PATCH 1/4] docs: payment concept

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 docs/contributions-architecture.md | 651 +++++++++++++++++++++++++++++
 docs/contributions-overview.md     | 527 +++++++++++++++++++++++
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 create mode 100644 docs/contributions-architecture.md
 create mode 100644 docs/contributions-overview.md

diff --git a/docs/contributions-architecture.md b/docs/contributions-architecture.md
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+# Membership Contributions - Technical Architecture
+
+**Project:** Mila - Membership Management System  
+**Feature:** Membership Contribution Management  
+**Version:** 1.0  
+**Last Updated:** 2025-11-27  
+**Status:** Architecture Design - Ready for Implementation
+
+---
+
+## Purpose
+
+This document defines the technical architecture for the Membership Contributions system. It focuses on architectural decisions, patterns, module structure, and integration points **without** concrete implementation details.
+
+**Related Documents:**
+- [contributions-overview.md](./contributions-overview.md) - Business logic and requirements
+- [database-schema-readme.md](./database-schema-readme.md) - Database documentation
+- [database_schema.dbml](./database_schema.dbml) - Database schema definition
+
+---
+
+## Table of Contents
+
+1. [Architecture Principles](#architecture-principles)
+2. [Domain Structure](#domain-structure)
+3. [Data Architecture](#data-architecture)
+4. [Business Logic Architecture](#business-logic-architecture)
+5. [Integration Points](#integration-points)
+6. [Acceptance Criteria](#acceptance-criteria)
+7. [Testing Strategy](#testing-strategy)
+8. [Security Considerations](#security-considerations)
+9. [Performance Considerations](#performance-considerations)
+
+---
+
+## Architecture Principles
+
+### Core Design Decisions
+
+1. **Single Responsibility:**
+   - Each module has one clear responsibility
+   - Period generation separated from status management
+   - Calendar logic isolated in dedicated module
+
+2. **No Redundancy:**
+   - No `period_end` field (calculated from `period_start` + `interval`)
+   - No `interval_type` field (read from `contribution_type.interval`)
+   - Eliminates data inconsistencies
+
+3. **Immutability Where Important:**
+   - `contribution_type.interval` cannot be changed after creation
+   - Prevents complex migration scenarios
+   - Enforced via Ash change validation
+
+4. **Historical Accuracy:**
+   - `amount` stored per period for audit trail
+   - Enables tracking of contribution changes over time
+   - Old periods retain original amounts
+
+5. **Calendar-Based Periods:**
+   - All periods aligned to calendar boundaries
+   - Simplifies date calculations
+   - Predictable period generation
+
+---
+
+## Domain Structure
+
+### Ash Domain: `Mv.Contributions`
+
+**Purpose:** Encapsulates all contribution-related resources and logic
+
+**Resources:**
+- `ContributionType` - Contribution type definitions (admin-managed)
+- `ContributionPeriod` - Individual contribution periods per member
+
+**Extensions:**
+- Member resource extended with contribution fields
+
+### Module Organization
+
+```
+lib/
+├── contributions/
+│   ├── contributions.ex              # Ash domain definition
+│   ├── contribution_type.ex          # ContributionType resource
+│   ├── contribution_period.ex        # ContributionPeriod resource
+│   └── changes/
+│       ├── prevent_interval_change.ex       # Validates interval immutability
+│       ├── set_contribution_start_date.ex   # Auto-sets start date
+│       └── validate_same_interval.ex        # Validates interval match on type change
+├── mv/
+│   └── contributions/
+│       ├── period_generator.ex              # Period generation algorithm
+│       └── calendar_periods.ex              # Calendar period calculations
+└── membership/
+    └── member.ex                     # Extended with contribution relationships
+```
+
+### Separation of Concerns
+
+**Domain Layer (Ash Resources):**
+- Data validation
+- Relationship management
+- Policy enforcement
+- Action definitions
+
+**Business Logic Layer (`Mv.Contributions`):**
+- Period generation algorithm
+- Calendar calculations
+- Date boundary handling
+- Status transitions
+
+**UI Layer (LiveView):**
+- User interaction
+- Display logic
+- Authorization checks
+- Form handling
+
+---
+
+## Data Architecture
+
+### Database Schema Extensions
+
+**See:** [database-schema-readme.md](./database-schema-readme.md) and [database_schema.dbml](./database_schema.dbml) for complete schema documentation.
+
+### New Tables
+
+1. **`contribution_types`**
+   - Purpose: Define contribution types with fixed intervals
+   - Key Constraint: `interval` field immutable after creation
+   - Relationships: has_many members, has_many contribution_periods
+
+2. **`contribution_periods`**
+   - Purpose: Individual contribution periods for members
+   - Key Design: NO `period_end` or `interval_type` fields (calculated)
+   - Relationships: belongs_to member, belongs_to contribution_type
+   - Composite uniqueness: One period per member per period_start
+
+### Member Table Extensions
+
+**Fields Added:**
+- `contribution_type_id` (FK, NOT NULL with default from settings)
+- `contribution_start_date` (Date, nullable)
+
+**Existing Fields Used:**
+- `joined_at` - For calculating contribution start
+- `left_at` - For limiting period generation
+
+### Settings Integration
+
+**Global Settings:**
+- `contributions.include_joining_period` (Boolean)
+- `contributions.default_contribution_type_id` (UUID)
+
+**Storage:** Existing settings mechanism (TBD: dedicated table or configuration resource)
+
+### Foreign Key Behaviors
+
+| Relationship | On Delete | Rationale |
+|--------------|-----------|-----------|
+| `contribution_periods.member_id → members.id` | CASCADE | Remove periods when member deleted |
+| `contribution_periods.contribution_type_id → contribution_types.id` | RESTRICT | Prevent type deletion if periods exist |
+| `members.contribution_type_id → contribution_types.id` | RESTRICT | Prevent type deletion if assigned to members |
+
+---
+
+## Business Logic Architecture
+
+### Period Generation System
+
+**Component:** `Mv.Contributions.PeriodGenerator`
+
+**Responsibilities:**
+- Calculate which periods should exist for a member
+- Generate missing periods
+- Respect contribution_start_date and left_at boundaries
+- Skip existing periods (idempotent)
+
+**Triggers:**
+1. Member contribution type assigned (via Ash change)
+2. Member created with contribution type (via Ash change)
+3. Scheduled job runs (daily/weekly cron)
+4. Admin manual regeneration (UI action)
+
+**Algorithm Steps:**
+1. Retrieve member with contribution_type and dates
+2. Determine first period start (based on contribution_start_date)
+3. Calculate all period starts from first to today (or left_at)
+4. Query existing periods for member
+5. Generate missing periods with current contribution_type.amount
+6. Insert new periods (batch operation)
+
+**Edge Case Handling:**
+- If contribution_start_date is NULL: Calculate from joined_at + global setting
+- If left_at is set: Stop generation at left_at
+- If contribution_type changes: Handled separately by regeneration logic
+
+### Calendar Period Calculations
+
+**Component:** `Mv.Contributions.CalendarPeriods`
+
+**Responsibilities:**
+- Calculate period boundaries based on interval type
+- Determine current period
+- Determine last completed period
+- Calculate period_end from period_start + interval
+
+**Functions (high-level):**
+- `calculate_period_start/3` - Given date and interval, find period start
+- `calculate_period_end/2` - Given period_start and interval, calculate end
+- `next_period_start/2` - Given period_start and interval, find next
+- `is_current_period?/2` - Check if period contains today
+- `is_last_completed_period?/2` - Check if period just ended
+
+**Interval Logic:**
+- **Monthly:** Start = 1st of month, End = last day of month
+- **Quarterly:** Start = 1st of quarter (Jan/Apr/Jul/Oct), End = last day of quarter
+- **Half-yearly:** Start = 1st of half (Jan/Jul), End = last day of half
+- **Yearly:** Start = Jan 1st, End = Dec 31st
+
+### Status Management
+
+**Component:** Ash actions on `ContributionPeriod`
+
+**Status Transitions:**
+- Simple state machine: unpaid ↔ paid ↔ suspended
+- No complex validation (all transitions allowed)
+- Permissions checked via Ash policies
+
+**Actions Required:**
+- `mark_as_paid` - Set status to :paid
+- `mark_as_suspended` - Set status to :suspended  
+- `mark_as_unpaid` - Set status to :unpaid (error correction)
+
+**Bulk Operations:**
+- `bulk_mark_as_paid` - Mark multiple periods as paid (efficiency)
+
+### Contribution Type Change Handling
+
+**Component:** Ash change on `Member.contribution_type_id`
+
+**Validation:**
+- Check if new type has same interval as old type
+- If different: Reject change (MVP constraint)
+- If same: Allow change
+
+**Side Effects on Allowed Change:**
+1. Keep all existing periods unchanged
+2. Find future unpaid periods
+3. Delete future unpaid periods
+4. Regenerate periods with new contribution_type_id and amount
+
+**Implementation Pattern:**
+- Use Ash change module to validate
+- Use after_action hook to trigger regeneration
+- Use transaction to ensure atomicity
+
+---
+
+## Integration Points
+
+### Member Resource Integration
+
+**Extension Points:**
+1. Add fields via migration
+2. Add relationships (belongs_to, has_many)
+3. Add calculations (current_period_status, overdue_count)
+4. Add changes (auto-set contribution_start_date, validate interval)
+
+**Backward Compatibility:**
+- New fields nullable or with defaults
+- Existing members get default contribution type from settings
+- No breaking changes to existing member functionality
+
+### Settings System Integration
+
+**Requirements:**
+- Store two global settings
+- Provide UI for admin to modify
+- Default values if not set
+- Validation (e.g., default_contribution_type_id must exist)
+
+**Access Pattern:**
+- Read settings during period generation
+- Read settings during member creation
+- Write settings only via admin UI
+
+### Permission System Integration
+
+**See:** [roles-and-permissions-architecture.md](./roles-and-permissions-architecture.md)
+
+**Required Permissions:**
+- `ContributionType.create/update/destroy` - Admin only
+- `ContributionType.read` - Admin, Treasurer, Board
+- `ContributionPeriod.update` (status changes) - Admin, Treasurer
+- `ContributionPeriod.read` - Admin, Treasurer, Board, Own member
+
+**Policy Patterns:**
+- Use existing HasPermission check
+- Leverage existing roles (Admin, Kassenwart)
+- Member can read own periods (linked via member_id)
+
+### LiveView Integration
+
+**New LiveViews Required:**
+1. ContributionType index/form (admin)
+2. ContributionPeriod table component (member detail view)
+3. Settings form section (admin)
+4. Member list column (contribution status)
+
+**Existing LiveViews to Extend:**
+- Member detail view: Add contributions section
+- Member list view: Add status column
+- Settings page: Add contributions section
+
+**Authorization Helpers:**
+- Use existing `can?/3` helper for UI conditionals
+- Check permissions before showing actions
+
+---
+
+## Acceptance Criteria
+
+### ContributionType Resource
+
+**AC-CT-1:** Admin can create contribution type with name, amount, interval, description  
+**AC-CT-2:** Interval field is immutable after creation (validation error on change attempt)  
+**AC-CT-3:** Admin can update name, amount, description (but not interval)  
+**AC-CT-4:** Cannot delete contribution type if assigned to members  
+**AC-CT-5:** Cannot delete contribution type if periods exist referencing it  
+**AC-CT-6:** Interval must be one of: monthly, quarterly, half_yearly, yearly
+
+### ContributionPeriod Resource
+
+**AC-CP-1:** Period has period_start, status, amount, notes, member_id, contribution_type_id  
+**AC-CP-2:** Period_end is calculated, not stored  
+**AC-CP-3:** Status defaults to :unpaid  
+**AC-CP-4:** One period per member per period_start (uniqueness constraint)  
+**AC-CP-5:** Amount is set at generation time from contribution_type.amount  
+**AC-CP-6:** Periods cascade delete when member deleted  
+**AC-CP-7:** Admin/Treasurer can change status  
+**AC-CP-8:** Member can read own periods
+
+### Member Extensions
+
+**AC-M-1:** Member has contribution_type_id field (NOT NULL with default)  
+**AC-M-2:** Member has contribution_start_date field (nullable)  
+**AC-M-3:** New members get default contribution type from global setting  
+**AC-M-4:** contribution_start_date auto-set based on joined_at and global setting  
+**AC-M-5:** Admin can manually override contribution_start_date  
+**AC-M-6:** Cannot change to contribution type with different interval (MVP)
+
+### Period Generation
+
+**AC-PG-1:** Periods generated when member gets contribution type  
+**AC-PG-2:** Periods generated when member created (via change hook)  
+**AC-PG-3:** Scheduled job generates missing periods daily  
+**AC-PG-4:** Generation respects contribution_start_date  
+**AC-PG-5:** Generation stops at left_at if member exited  
+**AC-PG-6:** Generation is idempotent (skips existing periods)  
+**AC-PG-7:** Periods align to calendar boundaries (1st of month/quarter/half/year)  
+**AC-PG-8:** Amount comes from contribution_type at generation time
+
+### Calendar Logic
+
+**AC-CL-1:** Monthly periods: 1st to last day of month  
+**AC-CL-2:** Quarterly periods: 1st of Jan/Apr/Jul/Oct to last day of quarter  
+**AC-CL-3:** Half-yearly periods: 1st of Jan/Jul to last day of half  
+**AC-CL-4:** Yearly periods: Jan 1 to Dec 31  
+**AC-CL-5:** Period_end calculated correctly for all interval types  
+**AC-CL-6:** Current period determined correctly based on today's date  
+**AC-CL-7:** Last completed period determined correctly
+
+### Contribution Type Change
+
+**AC-TC-1:** Can change to type with same interval  
+**AC-TC-2:** Cannot change to type with different interval (error message)  
+**AC-TC-3:** On allowed change: future unpaid periods regenerated  
+**AC-TC-4:** On allowed change: paid/suspended periods unchanged  
+**AC-TC-5:** On allowed change: amount updated to new type's amount  
+**AC-TC-6:** Change is atomic (transaction)
+
+### Settings
+
+**AC-S-1:** Global setting: include_joining_period (boolean, default true)  
+**AC-S-2:** Global setting: default_contribution_type_id (UUID, required)  
+**AC-S-3:** Admin can modify settings via UI  
+**AC-S-4:** Settings validated (e.g., default type must exist)  
+**AC-S-5:** Settings applied to new members immediately
+
+### UI - Member List
+
+**AC-UI-ML-1:** New column shows contribution status  
+**AC-UI-ML-2:** Default: Shows last completed period status  
+**AC-UI-ML-3:** Optional: Toggle to show current period status  
+**AC-UI-ML-4:** Color coding: green (paid), red (unpaid), gray (suspended)  
+**AC-UI-ML-5:** Filter: Unpaid in last period  
+**AC-UI-ML-6:** Filter: Unpaid in current period
+
+### UI - Member Detail
+
+**AC-UI-MD-1:** Contributions section shows all periods  
+**AC-UI-MD-2:** Table columns: Period, Interval, Amount, Status, Actions  
+**AC-UI-MD-3:** Checkbox per period for bulk marking  
+**AC-UI-MD-4:** "Mark selected as paid" button  
+**AC-UI-MD-5:** Dropdown to change contribution type (same interval only)  
+**AC-UI-MD-6:** Warning if different interval selected  
+**AC-UI-MD-7:** Only show actions if user has permission
+
+### UI - Contribution Types Admin
+
+**AC-UI-CTA-1:** List all contribution types  
+**AC-UI-CTA-2:** Show: Name, Amount, Interval, Member count  
+**AC-UI-CTA-3:** Create new contribution type form  
+**AC-UI-CTA-4:** Edit form: Name, Amount, Description editable  
+**AC-UI-CTA-5:** Edit form: Interval grayed out (not editable)  
+**AC-UI-CTA-6:** Warning on amount change (explain impact)  
+**AC-UI-CTA-7:** Cannot delete if members assigned  
+**AC-UI-CTA-8:** Only admin can access
+
+### UI - Settings Admin
+
+**AC-UI-SA-1:** Contributions section in settings  
+**AC-UI-SA-2:** Dropdown to select default contribution type  
+**AC-UI-SA-3:** Checkbox: Include joining period  
+**AC-UI-SA-4:** Explanatory text with examples  
+**AC-UI-SA-5:** Save button with validation
+
+---
+
+## Testing Strategy
+
+### Unit Testing
+
+**Period Generator Tests:**
+- Correct period_start calculation for all interval types
+- Correct period count from start to end date
+- Respects contribution_start_date boundary
+- Respects left_at boundary
+- Skips existing periods (idempotent)
+- Handles edge dates (year boundaries, leap years)
+
+**Calendar Periods Tests:**
+- Period boundaries correct for all intervals
+- Period_end calculation correct
+- Current period detection
+- Last completed period detection
+- Next period calculation
+
+**Validation Tests:**
+- Interval immutability enforced
+- Same interval validation on type change
+- Status transitions allowed
+- Uniqueness constraints enforced
+
+### Integration Testing
+
+**Period Generation Flow:**
+- Member creation triggers generation
+- Type assignment triggers generation
+- Type change regenerates future periods
+- Scheduled job generates missing periods
+- Left member stops generation
+
+**Status Management Flow:**
+- Mark single period as paid
+- Bulk mark multiple periods
+- Status transitions work
+- Permissions enforced
+
+**Contribution Type Management:**
+- Create type
+- Update amount (regeneration triggered)
+- Cannot update interval
+- Cannot delete if in use
+
+### LiveView Testing
+
+**Member List:**
+- Status column displays correctly
+- Toggle between last/current works
+- Filters work correctly
+- Color coding applied
+
+**Member Detail:**
+- Periods table displays all periods
+- Checkboxes work
+- Bulk marking works
+- Type change validation works
+- Actions only shown with permission
+
+**Admin UI:**
+- Type CRUD works
+- Settings save correctly
+- Validations display errors
+- Only authorized users can access
+
+### Edge Case Testing
+
+**Interval Change Attempt:**
+- Error message displayed
+- No data modified
+- User can cancel/choose different type
+
+**Exit with Unpaid:**
+- Warning shown
+- Option to suspend offered
+- Exit completes correctly
+
+**Amount Change:**
+- Warning displayed
+- Only future unpaid regenerated
+- Historical periods unchanged
+
+**Date Boundaries:**
+- Today = period start handled
+- Today = period end handled
+- Leap year handled
+
+### Performance Testing
+
+**Period Generation:**
+- Generate 10 years of monthly periods: < 100ms
+- Generate for 1000 members: < 5 seconds
+- Idempotent check efficient (no full scan)
+
+**Member List Query:**
+- With status column: < 200ms for 1000 members
+- Filters applied efficiently
+- No N+1 queries
+
+---
+
+## Security Considerations
+
+### Authorization
+
+**Permissions Required:**
+- ContributionType management: Admin only
+- ContributionPeriod status changes: Admin + Treasurer
+- View all periods: Admin + Treasurer + Board
+- View own periods: All authenticated users
+
+**Policy Enforcement:**
+- All actions protected by Ash policies
+- UI shows/hides based on permissions
+- Backend validates permissions (never trust UI alone)
+
+### Data Integrity
+
+**Validation Layers:**
+1. Database constraints (NOT NULL, UNIQUE, CHECK)
+2. Ash validations (business rules)
+3. UI validations (user experience)
+
+**Immutability Protection:**
+- Interval change prevented at multiple layers
+- Period amounts immutable (audit trail)
+- Settings changes logged (future)
+
+### Audit Trail
+
+**Tracked Information:**
+- Period status changes (who, when) - future enhancement
+- Type amount changes (implicit via period amounts)
+- Member type assignments (via timestamps)
+
+---
+
+## Performance Considerations
+
+### Database Indexes
+
+**Required Indexes:**
+- `contribution_periods(member_id)` - For member period lookups
+- `contribution_periods(contribution_type_id)` - For type queries
+- `contribution_periods(status)` - For unpaid filters
+- `contribution_periods(period_start)` - For date range queries
+- `contribution_periods(member_id, period_start)` - Composite unique index
+- `members(contribution_type_id)` - For type membership count
+
+### Query Optimization
+
+**Preloading:**
+- Load contribution_type with periods (avoid N+1)
+- Load periods when displaying member detail
+- Use Ash's load for efficient preloading
+
+**Calculated Fields:**
+- period_end calculated on-demand (not stored)
+- current_period_status calculated when needed
+- Use Ash calculations for lazy evaluation
+
+**Pagination:**
+- Period list paginated if > 50 periods
+- Member list already paginated
+
+### Caching Strategy
+
+**No caching needed in MVP:**
+- Contribution types rarely change
+- Period queries are fast
+- Settings read infrequently
+
+**Future caching if needed:**
+- Cache settings in application memory
+- Cache contribution types list
+- Invalidate on change
+
+### Scheduled Job Performance
+
+**Period Generation Job:**
+- Run daily or weekly (not hourly)
+- Batch members (process 100 at a time)
+- Skip members with no changes
+- Log failures for retry
+
+---
+
+## Future Enhancements
+
+### Phase 2: Interval Change Support
+
+**Architecture Changes:**
+- Add logic to handle period overlaps
+- Calculate prorata amounts if needed
+- More complex validation
+- Migration path for existing periods
+
+### Phase 3: Payment Details
+
+**Architecture Changes:**
+- Add PaymentTransaction resource
+- Link transactions to periods
+- Support multiple payments per period
+- Reconciliation logic
+
+### Phase 4: vereinfacht.digital Integration
+
+**Architecture Changes:**
+- External API client module
+- Webhook handling for transactions
+- Automatic matching logic
+- Manual review interface
+
+---
+
+**End of Architecture Document**
+
diff --git a/docs/contributions-overview.md b/docs/contributions-overview.md
new file mode 100644
index 0000000..03f347b
--- /dev/null
+++ b/docs/contributions-overview.md
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+# Membership Contributions - Overview
+
+**Project:** Mila - Membership Management System  
+**Feature:** Membership Contribution Management  
+**Version:** 1.0  
+**Last Updated:** 2025-11-27  
+**Status:** Concept - Ready for Review
+
+---
+
+## Purpose
+
+This document provides a comprehensive overview of the Membership Contributions system. It covers business logic, data model, UI/UX design, and technical architecture in a concise, bullet-point format.
+
+**For detailed implementation:** See [contributions-implementation-plan.md](./contributions-implementation-plan.md) (created after concept iterations)
+
+---
+
+## Table of Contents
+
+1. [Core Principle](#core-principle)
+2. [Terminology](#terminology)
+3. [Data Model](#data-model)
+4. [Business Logic](#business-logic)
+5. [UI/UX Design](#uiux-design)
+6. [Edge Cases](#edge-cases)
+7. [Technical Integration](#technical-integration)
+8. [Implementation Scope](#implementation-scope)
+
+---
+
+## Core Principle
+
+**Maximum Simplicity:**
+
+- Minimal complexity
+- Clear data model without redundancies
+- Intuitive operation
+- Calendar period-based (Month/Quarter/Half-Year/Year)
+
+---
+
+## Terminology
+
+### German ↔ English
+
+**Core Entities:**
+
+- Beitragsart ↔ Contribution Type / Membership Fee Type
+- Beitragsintervall ↔ Contribution Period
+- Mitgliedsbeitrag ↔ Membership Fee / Contribution
+
+**Status:**
+
+- bezahlt ↔ paid
+- unbezahlt ↔ unpaid
+- ausgesetzt ↔ suspended / waived
+
+**Intervals:**
+
+- monatlich ↔ monthly
+- quartalsweise ↔ quarterly
+- halbjährlich ↔ half-yearly / semi-annually
+- jährlich ↔ yearly / annually
+
+**UI Elements:**
+
+- "Letztes Intervall" ↔ "Last Period" (e.g., 2023 when in 2024)
+- "Aktuelles Intervall" ↔ "Current Period" (e.g., 2024)
+- "Als bezahlt markieren" ↔ "Mark as paid"
+- "Aussetzen" ↔ "Suspend" / "Waive"
+
+---
+
+## Data Model
+
+### Contribution Type (ContributionType)
+
+```
+- id (UUID)
+- name (String) - e.g., "Regular", "Reduced", "Student"
+- amount (Decimal) - Contribution amount in Euro
+- interval (Enum) - :monthly, :quarterly, :half_yearly, :yearly
+- description (Text, optional)
+- timestamps
+```
+
+**Important:**
+
+- `interval` is **IMMUTABLE** after creation!
+- Admin can only change `name`, `amount`, `description`
+- On change: Future unpaid periods regenerated with new amount
+
+### Contribution Period (ContributionPeriod)
+
+```
+- id (UUID)
+- member_id (FK → members.id)
+- contribution_type_id (FK → contribution_types.id)
+- period_start (Date) - Calendar period start (01.01., 01.04., 01.07., 01.10., etc.)
+- status (Enum) - :unpaid (default), :paid, :suspended
+- amount (Decimal) - Amount at generation time (history when type changes)
+- notes (Text, optional) - Admin notes
+- timestamps
+```
+
+**Important:**
+
+- **NO** `period_end` - calculated from `period_start` + `interval`
+- **NO** `interval_type` - read from `contribution_type.interval`
+- Avoids redundancy and inconsistencies!
+
+**Calendar Period Logic:**
+
+- Monthly: 01.01. - 31.01., 01.02. - 28./29.02., etc.
+- Quarterly: 01.01. - 31.03., 01.04. - 30.06., 01.07. - 30.09., 01.10. - 31.12.
+- Half-yearly: 01.01. - 30.06., 01.07. - 31.12.
+- Yearly: 01.01. - 31.12.
+
+### Member (Extensions)
+
+```
+- contribution_type_id (FK → contribution_types.id, NOT NULL, default from settings)
+- contribution_start_date (Date, nullable) - When to start generating contributions
+- left_at (Date, nullable) - Exit date (existing)
+```
+
+**Logic for contribution_start_date:**
+
+- Auto-set based on global setting `include_joining_period`
+- If `include_joining_period = true`: First day of joining month/quarter/year
+- If `include_joining_period = false`: First day of NEXT period after joining
+- Can be manually overridden by admin
+
+**NO** `include_joining_period` field on Member - unnecessary due to `contribution_start_date`!
+
+### Global Settings
+
+```
+key: "contributions.include_joining_period" 
+value: Boolean (Default: true)
+
+key: "contributions.default_contribution_type_id"
+value: UUID (Required) - Default contribution type for new members
+```
+
+**Meaning include_joining_period:**
+
+- `true`: Joining period is included (member pays from joining period)
+- `false`: Only from next full period after joining
+
+**Meaning default_contribution_type_id:**
+
+- Every new member automatically gets this contribution type
+- Must be configured in admin settings
+- Prevents: Members without contribution type
+
+---
+
+## Business Logic
+
+### Period Generation
+
+**Triggers:**
+
+- Member gets contribution type assigned (also during member creation)
+- New period begins (Cron job daily/weekly)
+- Admin requests manual regeneration
+
+**Algorithm:**
+
+1. Get `member.contribution_start_date` and `member.contribution_type`
+2. Calculate first period based on `contribution_start_date`
+3. Generate all periods from start to today (or `left_at` if present)
+4. Skip existing periods
+5. Set `amount` to current `contribution_type.amount`
+
+**Example (Yearly):**
+
+```
+Joining date: 15.03.2023
+include_joining_period: true
+→ contribution_start_date: 01.01.2023
+
+Generated periods:
+- 01.01.2023 - 31.12.2023 (joining period)
+- 01.01.2024 - 31.12.2024
+- 01.01.2025 - 31.12.2025 (current year)
+```
+
+**Example (Quarterly):**
+
+```
+Joining date: 15.03.2023
+include_joining_period: false
+→ contribution_start_date: 01.04.2023
+
+Generated periods:
+- 01.04.2023 - 30.06.2023 (first full quarter)
+- 01.07.2023 - 30.09.2023
+- 01.10.2023 - 31.12.2023
+- 01.01.2024 - 31.03.2024
+- ...
+```
+
+### Status Transitions
+
+```
+unpaid → paid
+unpaid → suspended
+paid → unpaid
+suspended → paid
+suspended → unpaid
+```
+
+**Permissions:**
+
+- Admin + Treasurer (Kassenwart) can change status
+- Uses existing permission system
+
+### Contribution Type Change
+
+**MVP - Same Interval Only:**
+
+- Member can only choose contribution type with **same interval**
+- Example: From "Regular (yearly)" to "Reduced (yearly)" ✓
+- Example: From "Regular (yearly)" to "Reduced (monthly)" ✗
+
+**Logic on Change:**
+
+1. Check: New contribution type has same interval
+2. If yes: Set `member.contribution_type_id`
+3. Future **unpaid** periods: Delete and regenerate with new amount
+4. Paid/suspended periods: Remain unchanged (historical amount)
+
+**Future - Different Intervals:**
+
+- Enable interval switching (e.g., yearly → monthly)
+- More complex logic for period overlaps
+- Needs additional validation
+
+### Member Exit
+
+**Logic:**
+
+- Periods only generated until `member.left_at`
+- Existing periods remain visible
+- Unpaid exit period can be marked as "suspended"
+
+**Example:**
+
+```
+Exit: 15.08.2024
+Yearly period: 01.01.2024 - 31.12.2024
+
+→ Period 2024 is shown (Status: unpaid)
+→ Admin can set to "suspended"
+→ No periods for 2025+ generated
+```
+
+---
+
+## UI/UX Design
+
+### Member List View
+
+**New Column: "Contribution Status"**
+
+**Default Display (Last Period):**
+
+- Shows status of **last completed** period
+- Example in 2024: Shows contribution for 2023
+- Color coding:
+  - Green: paid ✓
+  - Red: unpaid ✗
+  - Gray: suspended ⊘
+
+**Optional: Show Current Period**
+
+- Toggle: "Show current period" (2024)
+- Admin decides what to display
+
+**Filters:**
+
+- "Unpaid contributions in last period"
+- "Unpaid contributions in current period"
+
+### Member Detail View
+
+**Section: "Contributions"**
+
+**Contribution Type Assignment:**
+
+```
+┌─────────────────────────────────────┐
+│ Contribution Type: [Dropdown]       │
+│ ⚠ Only types with same interval    │
+│   can be selected                   │
+└─────────────────────────────────────┘
+```
+
+**Period Table:**
+
+```
+┌───────────────┬──────────┬────────┬──────────┬─────────┐
+│ Period        │ Interval │ Amount │ Status   │ Action  │
+├───────────────┼──────────┼────────┼──────────┼─────────┤
+│ 01.01.2023-   │ Yearly   │ 50 €   │ ☑ Paid   │         │
+│ 31.12.2023    │          │        │          │         │
+├───────────────┼──────────┼────────┼──────────┼─────────┤
+│ 01.01.2024-   │ Yearly   │ 60 €   │ ☐ Open   │ [Mark   │
+│ 31.12.2024    │          │        │          │ as paid]│
+├───────────────┼──────────┼────────┼──────────┼─────────┤
+│ 01.01.2025-   │ Yearly   │ 60 €   │ ☐ Open   │ [Mark   │
+│ 31.12.2025    │          │        │          │ as paid]│
+└───────────────┴──────────┴────────┴──────────┴─────────┘
+
+Legend: ☑ = paid | ☐ = unpaid | ⊘ = suspended
+```
+
+**Quick Marking:**
+
+- Checkbox in each row for fast marking
+- Button: "Mark selected as paid"
+- Bulk action for multiple periods
+
+### Admin: Contribution Types Management
+
+**List:**
+
+```
+┌────────────┬──────────┬──────────┬────────────┬─────────┐
+│ Name       │ Amount   │ Interval │ Members    │ Actions │
+├────────────┼──────────┼──────────┼────────────┼─────────┤
+│ Regular    │ 60 €     │ Yearly   │ 45         │ [Edit]  │
+│ Reduced    │ 30 €     │ Yearly   │ 12         │ [Edit]  │
+│ Student    │ 20 €     │ Monthly  │ 8          │ [Edit]  │
+└────────────┴──────────┴──────────┴────────────┴─────────┘
+```
+
+**Edit:**
+
+- Name: ✓ editable
+- Amount: ✓ editable
+- Description: ✓ editable
+- Interval: ✗ **NOT** editable (grayed out)
+
+**Warning on Amount Change:**
+
+```
+⚠ Change amount to 65 €?
+  
+Impact:
+- 45 members affected
+- Future unpaid periods will be generated with 65 €
+- Already paid periods remain with old amount
+
+[Cancel] [Confirm]
+```
+
+### Admin: Settings
+
+**Contribution Configuration:**
+
+```
+Default Contribution Type: [Dropdown: Contribution Types]
+
+Selected: "Regular (60 €, Yearly)"
+
+This contribution type is automatically assigned to all new members.
+Can be changed individually per member.
+
+---
+
+☐ Include joining period
+
+When active:
+Members pay from the period of their joining.
+
+Example (Yearly):
+Joining: 15.03.2023
+→ Pays from 2023
+
+When inactive:
+Members pay from the next full period.
+
+Example (Yearly):
+Joining: 15.03.2023
+→ Pays from 2024
+```
+
+---
+
+## Edge Cases
+
+### 1. Contribution Type Change with Different Interval
+
+**MVP:** Blocked (only same interval allowed)
+
+**UI:**
+
+```
+Error: Interval change not possible
+
+Current contribution type: "Regular (Yearly)"
+Selected contribution type: "Student (Monthly)"
+
+Changing the interval is currently not possible.
+Please select a contribution type with interval "Yearly".
+
+[OK]
+```
+
+**Future:**
+
+- Allow interval switching
+- Calculate overlaps
+- Generate new periods without duplicates
+
+### 2. Exit with Unpaid Contributions
+
+**Scenario:**
+
+```
+Member exits: 15.08.2024
+Yearly period 2024: unpaid
+```
+
+**UI Notice on Exit:**
+
+```
+⚠ Unpaid contributions present
+
+This member has 1 unpaid period(s):
+- 2024: 60 € (unpaid)
+
+Do you want to continue?
+
+[ ] Mark contribution as "suspended"
+[Cancel] [Confirm Exit]
+```
+
+### 3. Multiple Unpaid Periods
+
+**Scenario:** Member hasn't paid for 2 years
+
+**Display:**
+
+```
+┌───────────────┬──────────┬────────┬──────────┬─────────┐
+│ 2023          │ Yearly   │ 50 €   │ ☐ Open   │ [✓]     │
+│ 2024          │ Yearly   │ 60 €   │ ☐ Open   │ [✓]     │
+│ 2025          │ Yearly   │ 60 €   │ ☐ Open   │ [ ]     │
+└───────────────┴──────────┴────────┴──────────┴─────────┘
+
+[Mark selected as paid] (2 selected)
+```
+
+### 4. Amount Changes
+
+**Scenario:**
+
+```
+2023: Regular = 50 €
+2024: Regular = 60 € (increase)
+```
+
+**Result:**
+
+- Period 2023: Saved with 50 € (history)
+- Period 2024: Generated with 60 € (current)
+- Both periods show correct historical amount
+
+### 5. Date Boundaries
+
+**Problem:** What if today = 01.01.2025?
+
+**Solution:**
+
+- Current period (2025) is generated
+- Status: unpaid (open)
+- Shown in overview
+
+---
+
+## Implementation Scope
+
+### MVP (Phase 1)
+
+**Included:**
+
+- ✓ Contribution types (CRUD)
+- ✓ Automatic period generation
+- ✓ Status management (paid/unpaid/suspended)
+- ✓ Member overview with contribution status
+- ✓ Period view per member
+- ✓ Quick checkbox marking
+- ✓ Bulk actions
+- ✓ Amount history
+- ✓ Same-interval type change
+- ✓ Default contribution type
+- ✓ Joining period configuration
+
+**NOT Included:**
+
+- ✗ Interval change (only same interval)
+- ✗ Payment details (date, method)
+- ✗ Automatic integration (vereinfacht.digital)
+- ✗ Prorata calculation
+- ✗ Reports/statistics
+- ✗ Reminders/dunning (manual via filters)
+
+### Future Enhancements
+
+**Phase 2:**
+
+- Payment details (date, amount, method)
+- Interval change for future unpaid periods
+- Manual vereinfacht.digital links per member
+- Extended filter options
+
+**Phase 3:**
+
+- Automated vereinfacht.digital integration
+- Automatic payment matching
+- SEPA integration
+- Advanced reports
-- 
2.47.2


From 83911224269f3e68aa86834b93244991b2fdbe9e Mon Sep 17 00:00:00 2001
From: Moritz <moritz.m@local-it.org>
Date: Mon, 1 Dec 2025 15:43:04 +0100
Subject: [PATCH 2/4] resolve review issues

---
 docs/contributions-architecture.md | 8 +++++---
 docs/contributions-overview.md     | 6 +++---
 2 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/docs/contributions-architecture.md b/docs/contributions-architecture.md
index b01ad30..3718a3b 100644
--- a/docs/contributions-architecture.md
+++ b/docs/contributions-architecture.md
@@ -147,6 +147,7 @@ lib/
 **Existing Fields Used:**
 - `joined_at` - For calculating contribution start
 - `left_at` - For limiting period generation
+- These fields must remain member fields and should not be replaced by custom fields in the future
 
 ### Settings Integration
 
@@ -236,6 +237,7 @@ lib/
 
 **Bulk Operations:**
 - `bulk_mark_as_paid` - Mark multiple periods as paid (efficiency)
+  - low priority, can be a future issue
 
 ### Contribution Type Change Handling
 
@@ -403,7 +405,7 @@ lib/
 
 **AC-UI-MD-1:** Contributions section shows all periods  
 **AC-UI-MD-2:** Table columns: Period, Interval, Amount, Status, Actions  
-**AC-UI-MD-3:** Checkbox per period for bulk marking  
+**AC-UI-MD-3:** Checkbox per period for bulk marking (low prio)  
 **AC-UI-MD-4:** "Mark selected as paid" button  
 **AC-UI-MD-5:** Dropdown to change contribution type (same interval only)  
 **AC-UI-MD-6:** Warning if different interval selected  
@@ -466,7 +468,7 @@ lib/
 
 **Status Management Flow:**
 - Mark single period as paid
-- Bulk mark multiple periods
+- Bulk mark multiple periods (low prio)
 - Status transitions work
 - Permissions enforced
 
@@ -487,7 +489,7 @@ lib/
 **Member Detail:**
 - Periods table displays all periods
 - Checkboxes work
-- Bulk marking works
+- Bulk marking works (low prio)
 - Type change validation works
 - Actions only shown with permission
 
diff --git a/docs/contributions-overview.md b/docs/contributions-overview.md
index 03f347b..e0c4bc8 100644
--- a/docs/contributions-overview.md
+++ b/docs/contributions-overview.md
@@ -321,7 +321,7 @@ Legend: ☑ = paid | ☐ = unpaid | ⊘ = suspended
 **Quick Marking:**
 
 - Checkbox in each row for fast marking
-- Button: "Mark selected as paid"
+- Button: "Mark selected as paid/unpaid/suspended"
 - Bulk action for multiple periods
 
 ### Admin: Contribution Types Management
@@ -426,7 +426,7 @@ Member exits: 15.08.2024
 Yearly period 2024: unpaid
 ```
 
-**UI Notice on Exit:**
+**UI Notice on Exit: (Low Prio)**
 
 ```
 ⚠ Unpaid contributions present
@@ -453,7 +453,7 @@ Do you want to continue?
 │ 2025          │ Yearly   │ 60 €   │ ☐ Open   │ [ ]     │
 └───────────────┴──────────┴────────┴──────────┴─────────┘
 
-[Mark selected as paid] (2 selected)
+[Mark selected as paid/unpaid/suspended] (2 selected)
 ```
 
 ### 4. Amount Changes
-- 
2.47.2


From cd1af5aff515ae2dd6e24e2495c3ccd368c0618e Mon Sep 17 00:00:00 2001
From: Moritz <moritz.m@local-it.org>
Date: Tue, 2 Dec 2025 16:39:09 +0100
Subject: [PATCH 3/4] feat: Add contribution management mock-up pages

Add non-functional preview pages for Contribution Types, Settings, and Member Contribution Periods with German translations
---
 docs/feature-roadmap.md                       |   6 +
 lib/mv_web/components/layouts/navbar.ex       |  11 +
 .../live/contribution_period_live/show.ex     | 345 +++++++++++++
 lib/mv_web/live/contribution_settings_live.ex | 277 +++++++++++
 .../live/contribution_type_live/index.ex      | 205 ++++++++
 lib/mv_web/router.ex                          |   5 +
 priv/gettext/de/LC_MESSAGES/default.po        | 451 ++++++++++++++++-
 priv/gettext/default.pot                      | 451 ++++++++++++++++-
 priv/gettext/en/LC_MESSAGES/default.po        | 457 +++++++++++++++++-
 9 files changed, 2187 insertions(+), 21 deletions(-)
 create mode 100644 lib/mv_web/live/contribution_period_live/show.ex
 create mode 100644 lib/mv_web/live/contribution_settings_live.ex
 create mode 100644 lib/mv_web/live/contribution_type_live/index.ex

diff --git a/docs/feature-roadmap.md b/docs/feature-roadmap.md
index 609523c..2f86f5e 100644
--- a/docs/feature-roadmap.md
+++ b/docs/feature-roadmap.md
@@ -187,10 +187,16 @@
 
 **Current State:**
 - ✅ Basic "paid" boolean field on members
+- ✅ **UI Mock-ups for Contribution Types & Settings** (2025-12-02)
 - ⚠️ No payment tracking
 
 **Open Issues:**
 - [#156](https://git.local-it.org/local-it/mitgliederverwaltung/issues/156) - Set up & document testing environment for vereinfacht.digital (L, Low priority)
+- [#226](https://git.local-it.org/local-it/mitgliederverwaltung/issues/226) - Payment/Contribution Mockup Pages (Preview)
+
+**Mock-Up Pages (Non-Functional Preview):**
+- `/contribution_types` - Contribution Types Management
+- `/contribution_settings` - Global Contribution Settings
 
 **Missing Features:**
 - ❌ Membership fee configuration
diff --git a/lib/mv_web/components/layouts/navbar.ex b/lib/mv_web/components/layouts/navbar.ex
index 7ff7f25..1c1138e 100644
--- a/lib/mv_web/components/layouts/navbar.ex
+++ b/lib/mv_web/components/layouts/navbar.ex
@@ -25,6 +25,17 @@ defmodule MvWeb.Layouts.Navbar do
           <li><.link navigate="/members">{gettext("Members")}</.link></li>
           <li><.link navigate="/custom_fields">{gettext("Custom Fields")}</.link></li>
           <li><.link navigate="/users">{gettext("Users")}</.link></li>
+          <li>
+            <details>
+              <summary>{gettext("Contributions")}</summary>
+              <ul class="bg-base-200 rounded-t-none p-2 z-10 w-48">
+                <li><.link navigate="/contribution_types">{gettext("Contribution Types")}</.link></li>
+                <li>
+                  <.link navigate="/contribution_settings">{gettext("Contribution Settings")}</.link>
+                </li>
+              </ul>
+            </details>
+          </li>
         </ul>
       </div>
       <div class="flex gap-2">
diff --git a/lib/mv_web/live/contribution_period_live/show.ex b/lib/mv_web/live/contribution_period_live/show.ex
new file mode 100644
index 0000000..95179ac
--- /dev/null
+++ b/lib/mv_web/live/contribution_period_live/show.ex
@@ -0,0 +1,345 @@
+defmodule MvWeb.ContributionPeriodLive.Show do
+  @moduledoc """
+  Mock-up LiveView for Member Contribution Periods (Admin/Treasurer View).
+
+  This is a preview-only page that displays the planned UI for viewing
+  and managing contribution periods for a specific member.
+  It shows static mock data and is not functional.
+
+  ## Planned Features (Future Implementation)
+  - Display all contribution periods for a member
+  - Show period dates, interval, amount, and status
+  - Quick status change (paid/unpaid/suspended)
+  - Bulk marking of multiple periods
+  - Notes per period
+
+  ## Note
+  This page is intentionally non-functional and serves as a UI mockup
+  for the upcoming Membership Contributions feature.
+  """
+  use MvWeb, :live_view
+
+  @impl true
+  def mount(_params, _session, socket) do
+    {:ok,
+     socket
+     |> assign(:page_title, gettext("Member Contributions"))
+     |> assign(:member, mock_member())
+     |> assign(:periods, mock_periods())
+     |> assign(:selected_periods, MapSet.new())}
+  end
+
+  @impl true
+  def render(assigns) do
+    ~H"""
+    <Layouts.app flash={@flash} current_user={@current_user}>
+      <.mockup_warning />
+
+      <.header>
+        {gettext("Contributions for %{name}", name: "#{@member.first_name} #{@member.last_name}")}
+        <:subtitle>
+          {gettext("Contribution type")}:
+          <span class="font-semibold">{@member.contribution_type}</span>
+          · {gettext("Member since")}: <span class="font-mono">{@member.joined_at}</span>
+        </:subtitle>
+        <:actions>
+          <.link navigate={~p"/contribution_settings"} class="btn btn-ghost btn-sm">
+            <.icon name="hero-arrow-left" class="size-4" />
+            {gettext("Back to Settings")}
+          </.link>
+        </:actions>
+      </.header>
+
+      <%!-- Member Info Card --%>
+      <div class="mb-6 shadow card bg-base-100">
+        <div class="card-body">
+          <div class="grid grid-cols-2 gap-4 md:grid-cols-4">
+            <div>
+              <span class="text-sm text-base-content/60">{gettext("Email")}</span>
+              <p class="font-medium">{@member.email}</p>
+            </div>
+            <div>
+              <span class="text-sm text-base-content/60">{gettext("Contribution Start")}</span>
+              <p class="font-mono">{@member.contribution_start}</p>
+            </div>
+            <div>
+              <span class="text-sm text-base-content/60">{gettext("Total Contributions")}</span>
+              <p class="font-semibold">{length(@periods)}</p>
+            </div>
+            <div>
+              <span class="text-sm text-base-content/60">{gettext("Open Contributions")}</span>
+              <p class="font-semibold text-error">
+                {Enum.count(@periods, &(&1.status == :unpaid))}
+              </p>
+            </div>
+          </div>
+        </div>
+      </div>
+
+      <%!-- Contribution Type Change --%>
+      <div class="mb-6 card bg-base-200">
+        <div class="py-4 card-body">
+          <div class="flex flex-wrap items-center gap-4">
+            <span class="font-semibold">{gettext("Change Contribution Type")}:</span>
+            <select class="w-64 select select-bordered select-sm" disabled>
+              <option selected>{@member.contribution_type} (60,00 €, {gettext("Yearly")})</option>
+              <option>{gettext("Reduced")} (30,00 €, {gettext("Yearly")})</option>
+              <option>{gettext("Honorary")} (0,00 €, {gettext("Yearly")})</option>
+            </select>
+            <span
+              class="text-sm text-base-content/60 cursor-help tooltip tooltip-bottom"
+              data-tip={
+                gettext(
+                  "Members can only switch between contribution types with the same payment interval (e.g., yearly to yearly). This prevents complex period overlaps."
+                )
+              }
+            >
+              <.icon name="hero-question-mark-circle" class="inline size-4" />
+              {gettext("Why are not all contribution types shown?")}
+            </span>
+          </div>
+        </div>
+      </div>
+
+      <%!-- Bulk Actions --%>
+      <div class="flex flex-wrap items-center gap-4 mb-4">
+        <span class="text-sm text-base-content/60">
+          {ngettext(
+            "%{count} period selected",
+            "%{count} periods selected",
+            MapSet.size(@selected_periods),
+            count: MapSet.size(@selected_periods)
+          )}
+        </span>
+        <button class="btn btn-sm btn-success" disabled>
+          <.icon name="hero-check" class="size-4" />
+          {gettext("Mark as Paid")}
+        </button>
+        <button class="btn btn-sm btn-ghost" disabled>
+          <.icon name="hero-minus-circle" class="size-4" />
+          {gettext("Mark as Suspended")}
+        </button>
+        <button class="btn btn-sm btn-ghost" disabled>
+          <.icon name="hero-x-circle" class="size-4" />
+          {gettext("Mark as Unpaid")}
+        </button>
+      </div>
+
+      <%!-- Periods Table --%>
+      <div class="overflow-x-auto">
+        <table class="table table-zebra">
+          <thead>
+            <tr>
+              <th>
+                <input type="checkbox" class="checkbox checkbox-sm" disabled />
+              </th>
+              <th>{gettext("Time Period")}</th>
+              <th>{gettext("Interval")}</th>
+              <th>{gettext("Amount")}</th>
+              <th>{gettext("Status")}</th>
+              <th>{gettext("Notes")}</th>
+              <th>{gettext("Actions")}</th>
+            </tr>
+          </thead>
+          <tbody>
+            <tr :for={period <- @periods} class={period_row_class(period.status)}>
+              <td>
+                <input
+                  type="checkbox"
+                  class="checkbox checkbox-sm"
+                  checked={MapSet.member?(@selected_periods, period.id)}
+                  disabled
+                />
+              </td>
+              <td>
+                <div class="font-mono">
+                  {period.period_start} – {period.period_end}
+                </div>
+                <div :if={period.is_current} class="mt-1 badge badge-info badge-sm">
+                  {gettext("Current")}
+                </div>
+              </td>
+              <td>
+                <span class="badge badge-outline badge-sm">{format_interval(period.interval)}</span>
+              </td>
+              <td>
+                <span class="font-mono">{format_currency(period.amount)}</span>
+              </td>
+              <td>
+                <.status_badge status={period.status} />
+              </td>
+              <td>
+                <span :if={period.notes} class="text-sm italic text-base-content/60">
+                  {period.notes}
+                </span>
+                <span :if={!period.notes} class="text-base-content/30">—</span>
+              </td>
+              <td class="w-0 font-semibold whitespace-nowrap">
+                <div class="flex gap-4">
+                  <.link
+                    href="#"
+                    class={[
+                      "cursor-not-allowed",
+                      if(period.status == :paid, do: "invisible", else: "opacity-50")
+                    ]}
+                  >
+                    {gettext("Paid")}
+                  </.link>
+                  <.link
+                    href="#"
+                    class={[
+                      "cursor-not-allowed",
+                      if(period.status == :suspended, do: "invisible", else: "opacity-50")
+                    ]}
+                  >
+                    {gettext("Suspend")}
+                  </.link>
+                  <.link
+                    href="#"
+                    class={[
+                      "cursor-not-allowed",
+                      if(period.status != :paid, do: "invisible", else: "opacity-50")
+                    ]}
+                  >
+                    {gettext("Reopen")}
+                  </.link>
+                  <.link href="#" class="opacity-50 cursor-not-allowed">
+                    {gettext("Note")}
+                  </.link>
+                </div>
+              </td>
+            </tr>
+          </tbody>
+        </table>
+      </div>
+    </Layouts.app>
+    """
+  end
+
+  # Mock-up warning banner component - subtle orange style
+  defp mockup_warning(assigns) do
+    ~H"""
+    <div class="flex items-center gap-3 px-4 py-3 mb-6 border rounded-lg border-warning text-warning bg-base-100">
+      <.icon name="hero-exclamation-triangle" class="size-5 shrink-0" />
+      <div>
+        <span class="font-semibold">{gettext("Preview Mockup")}</span>
+        <span class="ml-2 text-sm text-base-content/70">
+          – {gettext("This page is not functional and only displays the planned features.")}
+        </span>
+      </div>
+    </div>
+    """
+  end
+
+  # Status badge component
+  attr :status, :atom, required: true
+
+  defp status_badge(%{status: :paid} = assigns) do
+    ~H"""
+    <span class="gap-1 badge badge-success">
+      <.icon name="hero-check-circle-mini" class="size-3" />
+      {gettext("Paid")}
+    </span>
+    """
+  end
+
+  defp status_badge(%{status: :unpaid} = assigns) do
+    ~H"""
+    <span class="gap-1 badge badge-error">
+      <.icon name="hero-x-circle-mini" class="size-3" />
+      {gettext("Unpaid")}
+    </span>
+    """
+  end
+
+  defp status_badge(%{status: :suspended} = assigns) do
+    ~H"""
+    <span class="gap-1 badge badge-neutral">
+      <.icon name="hero-pause-circle-mini" class="size-3" />
+      {gettext("Suspended")}
+    </span>
+    """
+  end
+
+  defp period_row_class(:unpaid), do: "bg-error/5"
+  defp period_row_class(:suspended), do: "bg-base-200/50"
+  defp period_row_class(_), do: ""
+
+  # Mock member data
+  defp mock_member do
+    %{
+      id: "123",
+      first_name: "Maria",
+      last_name: "Weber",
+      email: "maria.weber@example.de",
+      contribution_type: gettext("Regular"),
+      joined_at: "15.03.2021",
+      contribution_start: "01.01.2021"
+    }
+  end
+
+  # Mock periods data
+  defp mock_periods do
+    [
+      %{
+        id: "p1",
+        period_start: "01.01.2025",
+        period_end: "31.12.2025",
+        interval: :yearly,
+        amount: Decimal.new("60.00"),
+        status: :unpaid,
+        notes: nil,
+        is_current: true
+      },
+      %{
+        id: "p2",
+        period_start: "01.01.2024",
+        period_end: "31.12.2024",
+        interval: :yearly,
+        amount: Decimal.new("60.00"),
+        status: :paid,
+        notes: gettext("Paid via bank transfer"),
+        is_current: false
+      },
+      %{
+        id: "p3",
+        period_start: "01.01.2023",
+        period_end: "31.12.2023",
+        interval: :yearly,
+        amount: Decimal.new("50.00"),
+        status: :paid,
+        notes: nil,
+        is_current: false
+      },
+      %{
+        id: "p4",
+        period_start: "01.01.2022",
+        period_end: "31.12.2022",
+        interval: :yearly,
+        amount: Decimal.new("50.00"),
+        status: :paid,
+        notes: nil,
+        is_current: false
+      },
+      %{
+        id: "p5",
+        period_start: "01.01.2021",
+        period_end: "31.12.2021",
+        interval: :yearly,
+        amount: Decimal.new("50.00"),
+        status: :suspended,
+        notes: gettext("Joining year - reduced to 0"),
+        is_current: false
+      }
+    ]
+  end
+
+  defp format_currency(%Decimal{} = amount) do
+    "#{Decimal.to_string(amount)} €"
+  end
+
+  defp format_interval(:monthly), do: gettext("Monthly")
+  defp format_interval(:quarterly), do: gettext("Quarterly")
+  defp format_interval(:half_yearly), do: gettext("Half-yearly")
+  defp format_interval(:yearly), do: gettext("Yearly")
+end
diff --git a/lib/mv_web/live/contribution_settings_live.ex b/lib/mv_web/live/contribution_settings_live.ex
new file mode 100644
index 0000000..713bc8c
--- /dev/null
+++ b/lib/mv_web/live/contribution_settings_live.ex
@@ -0,0 +1,277 @@
+defmodule MvWeb.ContributionSettingsLive do
+  @moduledoc """
+  Mock-up LiveView for Contribution Settings (Admin).
+
+  This is a preview-only page that displays the planned UI for managing
+  global contribution settings. It shows static mock data and is not functional.
+
+  ## Planned Features (Future Implementation)
+  - Set default contribution type for new members
+  - Configure whether joining period is included in contributions
+  - Explanatory text with examples
+
+  ## Settings
+  - `default_contribution_type_id` - UUID of the default contribution type
+  - `include_joining_period` - Boolean whether to include joining period
+
+  ## Note
+  This page is intentionally non-functional and serves as a UI mockup
+  for the upcoming Membership Contributions feature.
+  """
+  use MvWeb, :live_view
+
+  @impl true
+  def mount(_params, _session, socket) do
+    {:ok,
+     socket
+     |> assign(:page_title, gettext("Contribution Settings"))
+     |> assign(:contribution_types, mock_contribution_types())
+     |> assign(:selected_type_id, "1")
+     |> assign(:include_joining_period, true)}
+  end
+
+  @impl true
+  def render(assigns) do
+    ~H"""
+    <Layouts.app flash={@flash} current_user={@current_user}>
+      <.mockup_warning />
+
+      <.header>
+        {gettext("Contribution Settings")}
+        <:subtitle>
+          {gettext("Configure global settings for membership contributions.")}
+        </:subtitle>
+      </.header>
+
+      <div class="grid gap-6 lg:grid-cols-2">
+        <%!-- Settings Form --%>
+        <div class="card bg-base-100 shadow-xl">
+          <div class="card-body">
+            <h2 class="card-title">
+              <.icon name="hero-cog-6-tooth" class="size-5" />
+              {gettext("Global Settings")}
+            </h2>
+
+            <form class="space-y-6">
+              <%!-- Default Contribution Type --%>
+              <fieldset class="fieldset">
+                <label class="label">
+                  <span class="label-text font-semibold">
+                    {gettext("Default Contribution Type")}
+                  </span>
+                </label>
+                <select class="select select-bordered w-full" disabled>
+                  <option :for={ct <- @contribution_types} selected={ct.id == @selected_type_id}>
+                    {ct.name} ({format_currency(ct.amount)}, {format_interval(ct.interval)})
+                  </option>
+                </select>
+                <p class="text-sm text-base-content/60 mt-2">
+                  {gettext(
+                    "This contribution type is automatically assigned to all new members. Can be changed individually per member."
+                  )}
+                </p>
+              </fieldset>
+
+              <%!-- Include Joining Period --%>
+              <fieldset class="fieldset">
+                <label class="label cursor-pointer justify-start gap-3">
+                  <input
+                    type="checkbox"
+                    class="checkbox checkbox-primary"
+                    checked={@include_joining_period}
+                    disabled
+                  />
+                  <span class="label-text font-semibold">
+                    {gettext("Include joining period")}
+                  </span>
+                </label>
+                <div class="ml-9 space-y-2">
+                  <p class="text-sm text-base-content/60">
+                    {gettext("When active: Members pay from the period of their joining.")}
+                  </p>
+                  <p class="text-sm text-base-content/60">
+                    {gettext("When inactive: Members pay from the next full period after joining.")}
+                  </p>
+                </div>
+              </fieldset>
+
+              <div class="divider"></div>
+
+              <button type="button" class="btn btn-primary w-full" disabled>
+                <.icon name="hero-check" class="size-5" />
+                {gettext("Save Settings")}
+              </button>
+            </form>
+          </div>
+        </div>
+
+        <%!-- Examples Card --%>
+        <div class="card bg-base-200">
+          <div class="card-body">
+            <h2 class="card-title">
+              <.icon name="hero-light-bulb" class="size-5" />
+              {gettext("Examples")}
+            </h2>
+
+            <.example_section
+              title={gettext("Yearly Interval - Joining Period Included")}
+              joining_date="15.03.2023"
+              include_joining={true}
+              start_date="01.01.2023"
+              periods={["2023", "2024", "2025"]}
+              note={gettext("Member pays for the year they joined")}
+            />
+
+            <div class="divider"></div>
+
+            <.example_section
+              title={gettext("Yearly Interval - Joining Period Excluded")}
+              joining_date="15.03.2023"
+              include_joining={false}
+              start_date="01.01.2024"
+              periods={["2024", "2025"]}
+              note={gettext("Member pays from the next full year")}
+            />
+
+            <div class="divider"></div>
+
+            <.example_section
+              title={gettext("Quarterly Interval - Joining Period Excluded")}
+              joining_date="15.05.2024"
+              include_joining={false}
+              start_date="01.07.2024"
+              periods={["Q3/2024", "Q4/2024", "Q1/2025"]}
+              note={gettext("Member pays from the next full quarter")}
+            />
+
+            <div class="divider"></div>
+
+            <.example_section
+              title={gettext("Monthly Interval - Joining Period Included")}
+              joining_date="15.03.2024"
+              include_joining={true}
+              start_date="01.03.2024"
+              periods={["03/2024", "04/2024", "05/2024", "..."]}
+              note={gettext("Member pays from the joining month")}
+            />
+          </div>
+        </div>
+      </div>
+
+      <.example_member_card />
+    </Layouts.app>
+    """
+  end
+
+  # Example member card with link to period view
+  defp example_member_card(assigns) do
+    ~H"""
+    <div class="card bg-base-100 shadow-xl mt-6">
+      <div class="card-body">
+        <h2 class="card-title">
+          <.icon name="hero-user" class="size-5" />
+          {gettext("Example: Member Contribution View")}
+        </h2>
+        <p class="text-base-content/70">
+          {gettext(
+            "See how the contribution periods will be displayed for an individual member. This example shows Maria Weber with multiple contribution periods."
+          )}
+        </p>
+        <div class="card-actions justify-end">
+          <.link navigate={~p"/contributions/member/example"} class="btn btn-primary btn-sm">
+            <.icon name="hero-eye" class="size-4" />
+            {gettext("View Example Member")}
+          </.link>
+        </div>
+      </div>
+    </div>
+    """
+  end
+
+  # Mock-up warning banner component - subtle orange style
+  defp mockup_warning(assigns) do
+    ~H"""
+    <div class="border border-warning text-warning bg-base-100 rounded-lg px-4 py-3 mb-6 flex items-center gap-3">
+      <.icon name="hero-exclamation-triangle" class="size-5 shrink-0" />
+      <div>
+        <span class="font-semibold">{gettext("Preview Mockup")}</span>
+        <span class="text-sm text-base-content/70 ml-2">
+          – {gettext("This page is not functional and only displays the planned features.")}
+        </span>
+      </div>
+    </div>
+    """
+  end
+
+  # Example section component
+  attr :title, :string, required: true
+  attr :joining_date, :string, required: true
+  attr :include_joining, :boolean, required: true
+  attr :start_date, :string, required: true
+  attr :periods, :list, required: true
+  attr :note, :string, required: true
+
+  defp example_section(assigns) do
+    ~H"""
+    <div class="space-y-2">
+      <h3 class="font-semibold text-sm">{@title}</h3>
+      <div class="bg-base-300 rounded-lg p-3 text-sm space-y-1">
+        <p>
+          <span class="text-base-content/60">{gettext("Joining date")}:</span>
+          <span class="font-mono">{@joining_date}</span>
+        </p>
+        <p>
+          <span class="text-base-content/60">{gettext("Contribution start")}:</span>
+          <span class="font-mono font-semibold text-primary">{@start_date}</span>
+        </p>
+        <p>
+          <span class="text-base-content/60">{gettext("Generated periods")}:</span>
+          <span class="font-mono">
+            {Enum.join(@periods, ", ")}
+          </span>
+        </p>
+      </div>
+      <p class="text-xs text-base-content/60 italic">→ {@note}</p>
+    </div>
+    """
+  end
+
+  # Mock data for demonstration
+  defp mock_contribution_types do
+    [
+      %{
+        id: "1",
+        name: gettext("Regular"),
+        amount: Decimal.new("60.00"),
+        interval: :yearly
+      },
+      %{
+        id: "2",
+        name: gettext("Reduced"),
+        amount: Decimal.new("30.00"),
+        interval: :yearly
+      },
+      %{
+        id: "3",
+        name: gettext("Student"),
+        amount: Decimal.new("5.00"),
+        interval: :monthly
+      },
+      %{
+        id: "4",
+        name: gettext("Family"),
+        amount: Decimal.new("25.00"),
+        interval: :quarterly
+      }
+    ]
+  end
+
+  defp format_currency(%Decimal{} = amount) do
+    "#{Decimal.to_string(amount)} €"
+  end
+
+  defp format_interval(:monthly), do: gettext("Monthly")
+  defp format_interval(:quarterly), do: gettext("Quarterly")
+  defp format_interval(:half_yearly), do: gettext("Half-yearly")
+  defp format_interval(:yearly), do: gettext("Yearly")
+end
diff --git a/lib/mv_web/live/contribution_type_live/index.ex b/lib/mv_web/live/contribution_type_live/index.ex
new file mode 100644
index 0000000..9a7b602
--- /dev/null
+++ b/lib/mv_web/live/contribution_type_live/index.ex
@@ -0,0 +1,205 @@
+defmodule MvWeb.ContributionTypeLive.Index do
+  @moduledoc """
+  Mock-up LiveView for Contribution Types Management (Admin).
+
+  This is a preview-only page that displays the planned UI for managing
+  contribution types. It shows static mock data and is not functional.
+
+  ## Planned Features (Future Implementation)
+  - List all contribution types
+  - Display: Name, Amount, Interval, Member count
+  - Create new contribution types
+  - Edit existing contribution types (name, amount, description - NOT interval)
+  - Delete contribution types (if no members assigned)
+
+  ## Note
+  This page is intentionally non-functional and serves as a UI mockup
+  for the upcoming Membership Contributions feature.
+  """
+  use MvWeb, :live_view
+
+  @impl true
+  def mount(_params, _session, socket) do
+    {:ok,
+     socket
+     |> assign(:page_title, gettext("Contribution Types"))
+     |> assign(:contribution_types, mock_contribution_types())}
+  end
+
+  @impl true
+  def render(assigns) do
+    ~H"""
+    <Layouts.app flash={@flash} current_user={@current_user}>
+      <.mockup_warning />
+
+      <.header>
+        {gettext("Contribution Types")}
+        <:subtitle>
+          {gettext("Manage contribution types for membership fees.")}
+        </:subtitle>
+        <:actions>
+          <button class="btn btn-primary" disabled>
+            <.icon name="hero-plus" /> {gettext("New Contribution Type")}
+          </button>
+        </:actions>
+      </.header>
+
+      <.table id="contribution_types" rows={@contribution_types} row_id={fn ct -> "ct-#{ct.id}" end}>
+        <:col :let={ct} label={gettext("Name")}>
+          <span class="font-medium">{ct.name}</span>
+          <p :if={ct.description} class="text-sm text-base-content/60">{ct.description}</p>
+        </:col>
+
+        <:col :let={ct} label={gettext("Amount")}>
+          <span class="font-mono">{format_currency(ct.amount)}</span>
+        </:col>
+
+        <:col :let={ct} label={gettext("Interval")}>
+          <span class="badge badge-outline">{format_interval(ct.interval)}</span>
+        </:col>
+
+        <:col :let={ct} label={gettext("Members")}>
+          <span class="badge badge-ghost">{ct.member_count}</span>
+        </:col>
+
+        <:action :let={_ct}>
+          <button class="btn btn-ghost btn-xs" disabled title={gettext("Edit")}>
+            <.icon name="hero-pencil" class="size-4" />
+          </button>
+        </:action>
+
+        <:action :let={ct}>
+          <button
+            class="btn btn-ghost btn-xs text-error"
+            disabled
+            title={
+              if ct.member_count > 0,
+                do: gettext("Cannot delete - members assigned"),
+                else: gettext("Delete")
+            }
+          >
+            <.icon name="hero-trash" class="size-4" />
+          </button>
+        </:action>
+      </.table>
+
+      <.info_card />
+    </Layouts.app>
+    """
+  end
+
+  # Mock-up warning banner component - subtle orange style
+  defp mockup_warning(assigns) do
+    ~H"""
+    <div class="border border-warning text-warning bg-base-100 rounded-lg px-4 py-3 mb-6 flex items-center gap-3">
+      <.icon name="hero-exclamation-triangle" class="size-5 shrink-0" />
+      <div>
+        <span class="font-semibold">{gettext("Preview Mockup")}</span>
+        <span class="text-sm text-base-content/70 ml-2">
+          – {gettext("This page is not functional and only displays the planned features.")}
+        </span>
+      </div>
+    </div>
+    """
+  end
+
+  # Info card explaining the contribution type concept
+  defp info_card(assigns) do
+    ~H"""
+    <div class="card bg-base-200 mt-6">
+      <div class="card-body">
+        <h2 class="card-title">
+          <.icon name="hero-information-circle" class="size-5" />
+          {gettext("About Contribution Types")}
+        </h2>
+        <div class="prose prose-sm max-w-none">
+          <p>
+            {gettext(
+              "Contribution types define different membership fee structures. Each type has a fixed interval (monthly, quarterly, half-yearly, yearly) that cannot be changed after creation."
+            )}
+          </p>
+          <ul>
+            <li>
+              <strong>{gettext("Name & Amount")}</strong>
+              - {gettext("Can be changed at any time. Amount changes affect future periods only.")}
+            </li>
+            <li>
+              <strong>{gettext("Interval")}</strong>
+              - {gettext(
+                "Fixed after creation. Members can only switch between types with the same interval."
+              )}
+            </li>
+            <li>
+              <strong>{gettext("Deletion")}</strong>
+              - {gettext("Only possible if no members are assigned to this type.")}
+            </li>
+          </ul>
+        </div>
+      </div>
+    </div>
+    """
+  end
+
+  # Mock data for demonstration
+  defp mock_contribution_types do
+    [
+      %{
+        id: "1",
+        name: gettext("Regular"),
+        description: gettext("Standard membership fee for regular members"),
+        amount: Decimal.new("60.00"),
+        interval: :yearly,
+        member_count: 45
+      },
+      %{
+        id: "2",
+        name: gettext("Reduced"),
+        description: gettext("Reduced fee for unemployed, pensioners, or low income"),
+        amount: Decimal.new("30.00"),
+        interval: :yearly,
+        member_count: 12
+      },
+      %{
+        id: "3",
+        name: gettext("Student"),
+        description: gettext("Monthly fee for students and trainees"),
+        amount: Decimal.new("5.00"),
+        interval: :monthly,
+        member_count: 8
+      },
+      %{
+        id: "4",
+        name: gettext("Family"),
+        description: gettext("Quarterly fee for family memberships"),
+        amount: Decimal.new("25.00"),
+        interval: :quarterly,
+        member_count: 15
+      },
+      %{
+        id: "5",
+        name: gettext("Supporting Member"),
+        description: gettext("Half-yearly contribution for supporting members"),
+        amount: Decimal.new("100.00"),
+        interval: :half_yearly,
+        member_count: 3
+      },
+      %{
+        id: "6",
+        name: gettext("Honorary"),
+        description: gettext("No fee for honorary members"),
+        amount: Decimal.new("0.00"),
+        interval: :yearly,
+        member_count: 2
+      }
+    ]
+  end
+
+  defp format_currency(%Decimal{} = amount) do
+    "#{Decimal.to_string(amount)} €"
+  end
+
+  defp format_interval(:monthly), do: gettext("Monthly")
+  defp format_interval(:quarterly), do: gettext("Quarterly")
+  defp format_interval(:half_yearly), do: gettext("Half-yearly")
+  defp format_interval(:yearly), do: gettext("Yearly")
+end
diff --git a/lib/mv_web/router.ex b/lib/mv_web/router.ex
index 09a2792..c574e17 100644
--- a/lib/mv_web/router.ex
+++ b/lib/mv_web/router.ex
@@ -75,6 +75,11 @@ defmodule MvWeb.Router do
 
       live "/settings", GlobalSettingsLive
 
+      # Contribution Management (Mock-ups)
+      live "/contribution_types", ContributionTypeLive.Index, :index
+      live "/contribution_settings", ContributionSettingsLive
+      live "/contributions/member/:id", ContributionPeriodLive.Show, :show
+
       post "/set_locale", LocaleController, :set_locale
     end
 
diff --git a/priv/gettext/de/LC_MESSAGES/default.po b/priv/gettext/de/LC_MESSAGES/default.po
index 66bcec1..be7ffef 100644
--- a/priv/gettext/de/LC_MESSAGES/default.po
+++ b/priv/gettext/de/LC_MESSAGES/default.po
@@ -11,6 +11,7 @@ msgstr ""
 "Language: en\n"
 
 #: lib/mv_web/components/core_components.ex:386
+#: lib/mv_web/live/contribution_period_live/show.ex:141
 #, elixir-autogen, elixir-format
 msgid "Actions"
 msgstr "Aktionen"
@@ -34,12 +35,14 @@ msgstr "Verbindung wird wiederhergestellt"
 msgid "City"
 msgstr "Stadt"
 
+#: lib/mv_web/live/contribution_type_live/index.ex:78
 #: lib/mv_web/live/member_live/index.html.heex:250
 #: lib/mv_web/live/user_live/index.html.heex:74
 #, elixir-autogen, elixir-format
 msgid "Delete"
 msgstr "Löschen"
 
+#: lib/mv_web/live/contribution_type_live/index.ex:66
 #: lib/mv_web/live/member_live/index.html.heex:242
 #: lib/mv_web/live/user_live/form.ex:265
 #: lib/mv_web/live/user_live/index.html.heex:66
@@ -53,6 +56,7 @@ msgstr "Bearbeiten"
 msgid "Edit Member"
 msgstr "Mitglied bearbeiten"
 
+#: lib/mv_web/live/contribution_period_live/show.ex:58
 #: lib/mv_web/live/member_live/form.ex:47
 #: lib/mv_web/live/member_live/index.html.heex:112
 #: lib/mv_web/live/member_live/show.ex:50
@@ -121,6 +125,7 @@ msgstr "Austrittsdatum"
 msgid "House Number"
 msgstr "Hausnummer"
 
+#: lib/mv_web/live/contribution_period_live/show.ex:140
 #: lib/mv_web/live/member_live/form.ex:52
 #: lib/mv_web/live/member_live/show.ex:57
 #, elixir-autogen, elixir-format
@@ -129,6 +134,8 @@ msgstr "Notizen"
 
 #: lib/mv_web/live/components/payment_filter_component.ex:94
 #: lib/mv_web/live/components/payment_filter_component.ex:144
+#: lib/mv_web/live/contribution_period_live/show.ex:186
+#: lib/mv_web/live/contribution_period_live/show.ex:242
 #: lib/mv_web/live/member_live/form.ex:48
 #: lib/mv_web/live/member_live/index.html.heex:229
 #: lib/mv_web/live/member_live/show.ex:51
@@ -288,7 +295,7 @@ msgstr "ID"
 msgid "Immutable"
 msgstr "Unveränderlich"
 
-#: lib/mv_web/components/layouts/navbar.ex:102
+#: lib/mv_web/components/layouts/navbar.ex:113
 #, elixir-autogen, elixir-format
 msgid "Logout"
 msgstr "Abmelden"
@@ -305,12 +312,14 @@ msgid "Member"
 msgstr "Mitglied"
 
 #: lib/mv_web/components/layouts/navbar.ex:25
+#: lib/mv_web/live/contribution_type_live/index.ex:61
 #: lib/mv_web/live/member_live/index.ex:73
 #: lib/mv_web/live/member_live/index.html.heex:3
 #, elixir-autogen, elixir-format
 msgid "Members"
 msgstr "Mitglieder"
 
+#: lib/mv_web/live/contribution_type_live/index.ex:48
 #: lib/mv_web/live/custom_field_live/form.ex:51
 #, elixir-autogen, elixir-format
 msgid "Name"
@@ -331,6 +340,7 @@ msgstr "Nicht aktiviert"
 msgid "Not set"
 msgstr "Nicht gesetzt"
 
+#: lib/mv_web/live/contribution_period_live/show.ex:207
 #: lib/mv_web/live/user_live/form.ex:107
 #: lib/mv_web/live/user_live/form.ex:115
 #: lib/mv_web/live/user_live/form.ex:224
@@ -349,7 +359,7 @@ msgstr "OIDC ID"
 msgid "Password Authentication"
 msgstr "Passwort-Authentifizierung"
 
-#: lib/mv_web/components/layouts/navbar.ex:95
+#: lib/mv_web/components/layouts/navbar.ex:106
 #, elixir-autogen, elixir-format
 msgid "Profil"
 msgstr "Profil"
@@ -369,7 +379,7 @@ msgstr "Alle Mitglieder auswählen"
 msgid "Select member"
 msgstr "Mitglied auswählen"
 
-#: lib/mv_web/components/layouts/navbar.ex:99
+#: lib/mv_web/components/layouts/navbar.ex:110
 #, elixir-autogen, elixir-format
 msgid "Settings"
 msgstr "Einstellungen"
@@ -537,14 +547,14 @@ msgstr "Zurück zur Mitgliederliste"
 msgid "Back to users list"
 msgstr "Zurück zur Benutzer*innen-Liste"
 
-#: lib/mv_web/components/layouts/navbar.ex:33
-#: lib/mv_web/components/layouts/navbar.ex:39
+#: lib/mv_web/components/layouts/navbar.ex:44
+#: lib/mv_web/components/layouts/navbar.ex:50
 #, elixir-autogen, elixir-format
 msgid "Select language"
 msgstr "Sprache auswählen"
 
-#: lib/mv_web/components/layouts/navbar.ex:46
-#: lib/mv_web/components/layouts/navbar.ex:66
+#: lib/mv_web/components/layouts/navbar.ex:57
+#: lib/mv_web/components/layouts/navbar.ex:77
 #, elixir-autogen, elixir-format
 msgid "Toggle dark mode"
 msgstr "Dunklen Modus umschalten"
@@ -716,6 +726,7 @@ msgstr "Vereinsdaten"
 msgid "Manage global settings for the association."
 msgstr "Passe übergreifende Einstellungen für den Verein an."
 
+#: lib/mv_web/live/contribution_settings_live.ex:102
 #: lib/mv_web/live/global_settings_live.ex:56
 #, elixir-autogen, elixir-format, fuzzy
 msgid "Save Settings"
@@ -853,6 +864,432 @@ msgstr "Nicht bezahlt"
 msgid "Payment filter"
 msgstr "Zahlungsfilter"
 
+#: lib/mv_web/live/contribution_period_live/show.ex:107
+#, elixir-autogen, elixir-format
+msgid "%{count} period selected"
+msgid_plural "%{count} periods selected"
+msgstr[0] "%{count} Beiträge ausgewählt"
+msgstr[1] "%{count} Beiträge ausgewählt"
+
+#: lib/mv_web/live/contribution_type_live/index.ex:113
+#, elixir-autogen, elixir-format
+msgid "About Contribution Types"
+msgstr "Über Beitragsarten"
+
+#: lib/mv_web/live/contribution_period_live/show.ex:138
+#: lib/mv_web/live/contribution_type_live/index.ex:53
+#, elixir-autogen, elixir-format
+msgid "Amount"
+msgstr "Betrag"
+
+#: lib/mv_web/live/contribution_period_live/show.ex:48
+#, elixir-autogen, elixir-format
+msgid "Back to Settings"
+msgstr "Zurück zu Einstellungen"
+
+#: lib/mv_web/live/contribution_type_live/index.ex:124
+#, elixir-autogen, elixir-format
+msgid "Can be changed at any time. Amount changes affect future periods only."
+msgstr "Kann jederzeit geändert werden. Betragsänderungen wirken sich nur auf zukünftige Beiträge aus."
+
+#: lib/mv_web/live/contribution_type_live/index.ex:77
+#, elixir-autogen, elixir-format
+msgid "Cannot delete - members assigned"
+msgstr "Löschen nicht möglich - Mitglieder zugewiesen"
+
+#: lib/mv_web/live/contribution_period_live/show.ex:83
+#, elixir-autogen, elixir-format
+msgid "Change Contribution Type"
+msgstr "Beitragsart ändern"
+
+#: lib/mv_web/live/contribution_settings_live.ex:42
+#, elixir-autogen, elixir-format
+msgid "Configure global settings for membership contributions."
+msgstr "Globale Einstellungen für Mitgliedsbeiträge konfigurieren."
+
+#: lib/mv_web/components/layouts/navbar.ex:34
+#: lib/mv_web/live/contribution_settings_live.ex:27
+#: lib/mv_web/live/contribution_settings_live.ex:40
+#, elixir-autogen, elixir-format
+msgid "Contribution Settings"
+msgstr "Beitragseinstellungen"
+
+#: lib/mv_web/live/contribution_period_live/show.ex:62
+#, elixir-autogen, elixir-format
+msgid "Contribution Start"
+msgstr "Beitragsbeginn"
+
+#: lib/mv_web/components/layouts/navbar.ex:32
+#: lib/mv_web/live/contribution_type_live/index.ex:25
+#: lib/mv_web/live/contribution_type_live/index.ex:36
+#, elixir-autogen, elixir-format
+msgid "Contribution Types"
+msgstr "Beitragsarten"
+
+#: lib/mv_web/live/contribution_settings_live.ex:224
+#, elixir-autogen, elixir-format
+msgid "Contribution start"
+msgstr "Beitragsbeginn"
+
+#: lib/mv_web/live/contribution_period_live/show.ex:41
+#, elixir-autogen, elixir-format
+msgid "Contribution type"
+msgstr "Beitragsart"
+
+#: lib/mv_web/live/contribution_type_live/index.ex:117
+#, elixir-autogen, elixir-format
+msgid "Contribution types define different membership fee structures. Each type has a fixed interval (monthly, quarterly, half-yearly, yearly) that cannot be changed after creation."
+msgstr "Beitragsarten definieren verschiedene Mitgliedsbeitragsstrukturen. Jede Art hat ein festes Intervall (monatlich, quartalsweise, halbjährlich, jährlich), das nach der Erstellung nicht mehr geändert werden kann."
+
+#: lib/mv_web/components/layouts/navbar.ex:30
+#, elixir-autogen, elixir-format
+msgid "Contributions"
+msgstr "Beiträge"
+
+#: lib/mv_web/live/contribution_period_live/show.ex:39
+#, elixir-autogen, elixir-format
+msgid "Contributions for %{name}"
+msgstr "Beiträge für %{name}"
+
+#: lib/mv_web/live/contribution_period_live/show.ex:159
+#, elixir-autogen, elixir-format
+msgid "Current"
+msgstr "Aktuell"
+
+#: lib/mv_web/live/contribution_settings_live.ex:60
+#, elixir-autogen, elixir-format
+msgid "Default Contribution Type"
+msgstr "Standard-Beitragsart"
+
+#: lib/mv_web/live/contribution_type_live/index.ex:133
+#, elixir-autogen, elixir-format
+msgid "Deletion"
+msgstr "Löschung"
+
+#: lib/mv_web/live/contribution_settings_live.ex:173
+#, elixir-autogen, elixir-format
+msgid "Example: Member Contribution View"
+msgstr "Beispiel: Mitglieder-Beitragsansicht"
+
+#: lib/mv_web/live/contribution_settings_live.ex:113
+#, elixir-autogen, elixir-format
+msgid "Examples"
+msgstr "Beispiele"
+
+#: lib/mv_web/live/contribution_settings_live.ex:262
+#: lib/mv_web/live/contribution_type_live/index.ex:172
+#, elixir-autogen, elixir-format
+msgid "Family"
+msgstr "Familie"
+
+#: lib/mv_web/live/contribution_type_live/index.ex:128
+#, elixir-autogen, elixir-format
+msgid "Fixed after creation. Members can only switch between types with the same interval."
+msgstr "Nach der Erstellung unveränderlich. Mitglieder können nur zwischen Arten mit demselben Intervall wechseln."
+
+#: lib/mv_web/live/contribution_settings_live.ex:228
+#, elixir-autogen, elixir-format
+msgid "Generated periods"
+msgstr "Generierte Beiträge"
+
+#: lib/mv_web/live/contribution_settings_live.ex:52
+#, elixir-autogen, elixir-format
+msgid "Global Settings"
+msgstr "Globale Einstellungen"
+
+#: lib/mv_web/live/contribution_period_live/show.ex:344
+#: lib/mv_web/live/contribution_settings_live.ex:275
+#: lib/mv_web/live/contribution_type_live/index.ex:203
+#, elixir-autogen, elixir-format
+msgid "Half-yearly"
+msgstr "Halbjährlich"
+
+#: lib/mv_web/live/contribution_type_live/index.ex:181
+#, elixir-autogen, elixir-format
+msgid "Half-yearly contribution for supporting members"
+msgstr "Halbjährlicher Beitrag für Fördermitglieder"
+
+#: lib/mv_web/live/contribution_period_live/show.ex:87
+#: lib/mv_web/live/contribution_type_live/index.ex:188
+#, elixir-autogen, elixir-format
+msgid "Honorary"
+msgstr "Ehrenmitglied"
+
+#: lib/mv_web/live/contribution_settings_live.ex:85
+#, elixir-autogen, elixir-format
+msgid "Include joining period"
+msgstr "Zahlt ab Zeitpunkt des Eintritts"
+
+#: lib/mv_web/live/contribution_period_live/show.ex:137
+#: lib/mv_web/live/contribution_type_live/index.ex:57
+#: lib/mv_web/live/contribution_type_live/index.ex:127
+#, elixir-autogen, elixir-format
+msgid "Interval"
+msgstr "Intervall"
+
+#: lib/mv_web/live/contribution_settings_live.ex:220
+#, elixir-autogen, elixir-format
+msgid "Joining date"
+msgstr "Eintrittsdatum"
+
+#: lib/mv_web/live/contribution_period_live/show.ex:332
+#, elixir-autogen, elixir-format
+msgid "Joining year - reduced to 0"
+msgstr "Eintrittsjahr - auf 0 reduziert"
+
+#: lib/mv_web/live/contribution_type_live/index.ex:38
+#, elixir-autogen, elixir-format
+msgid "Manage contribution types for membership fees."
+msgstr "Beitragsarten für Mitgliedsbeiträge verwalten."
+
+#: lib/mv_web/live/contribution_period_live/show.ex:116
+#, elixir-autogen, elixir-format
+msgid "Mark as Paid"
+msgstr "Als bezahlt markieren"
+
+#: lib/mv_web/live/contribution_period_live/show.ex:120
+#, elixir-autogen, elixir-format
+msgid "Mark as Suspended"
+msgstr "Als ausgesetzt markieren"
+
+#: lib/mv_web/live/contribution_period_live/show.ex:124
+#, elixir-autogen, elixir-format
+msgid "Mark as Unpaid"
+msgstr "Als unbezahlt markieren"
+
+#: lib/mv_web/live/contribution_period_live/show.ex:26
+#, elixir-autogen, elixir-format
+msgid "Member Contributions"
+msgstr "Mitgliedsbeiträge"
+
+#: lib/mv_web/live/contribution_settings_live.ex:122
+#, elixir-autogen, elixir-format
+msgid "Member pays for the year they joined"
+msgstr "Mitglied zahlt für das Eintrittsjahr"
+
+#: lib/mv_web/live/contribution_settings_live.ex:155
+#, elixir-autogen, elixir-format
+msgid "Member pays from the joining month"
+msgstr "Mitglied zahlt ab dem Eintrittsmonat"
+
+#: lib/mv_web/live/contribution_settings_live.ex:144
+#, elixir-autogen, elixir-format
+msgid "Member pays from the next full quarter"
+msgstr "Mitglied zahlt ab dem nächsten vollen Quartal"
+
+#: lib/mv_web/live/contribution_settings_live.ex:133
+#, elixir-autogen, elixir-format
+msgid "Member pays from the next full year"
+msgstr "Mitglied zahlt ab dem nächsten vollen Jahr"
+
+#: lib/mv_web/live/contribution_period_live/show.ex:43
+#, elixir-autogen, elixir-format
+msgid "Member since"
+msgstr "Mitglied seit"
+
+#: lib/mv_web/live/contribution_period_live/show.ex:92
+#, elixir-autogen, elixir-format
+msgid "Members can only switch between contribution types with the same payment interval (e.g., yearly to yearly). This prevents complex period overlaps."
+msgstr "Mitglieder können nur zwischen Beitragsarten mit demselben Zahlungsintervall wechseln (z.B. jährlich zu jährlich). Dies verhindert komplexe Periodenüberschneidungen."
+
+#: lib/mv_web/live/contribution_period_live/show.ex:342
+#: lib/mv_web/live/contribution_settings_live.ex:273
+#: lib/mv_web/live/contribution_type_live/index.ex:201
+#, elixir-autogen, elixir-format
+msgid "Monthly"
+msgstr "Monatlich"
+
+#: lib/mv_web/live/contribution_settings_live.ex:150
+#, elixir-autogen, elixir-format
+msgid "Monthly Interval - Joining Period Included"
+msgstr "Monatliches Intervall - Eintrittsperiode eingeschlossen"
+
+#: lib/mv_web/live/contribution_type_live/index.ex:165
+#, elixir-autogen, elixir-format
+msgid "Monthly fee for students and trainees"
+msgstr "Monatlicher Beitrag für Studierende und Auszubildende"
+
+#: lib/mv_web/live/contribution_type_live/index.ex:123
+#, elixir-autogen, elixir-format
+msgid "Name & Amount"
+msgstr "Name & Betrag"
+
+#: lib/mv_web/live/contribution_type_live/index.ex:42
+#, elixir-autogen, elixir-format
+msgid "New Contribution Type"
+msgstr "Neue Beitragsart"
+
+#: lib/mv_web/live/contribution_type_live/index.ex:189
+#, elixir-autogen, elixir-format
+msgid "No fee for honorary members"
+msgstr "Kein Beitrag für Ehrenmitglieder"
+
+#: lib/mv_web/live/contribution_type_live/index.ex:134
+#, elixir-autogen, elixir-format
+msgid "Only possible if no members are assigned to this type."
+msgstr "Nur möglich, wenn keine Mitglieder dieser Art zugewiesen sind."
+
+#: lib/mv_web/live/contribution_period_live/show.ex:70
+#, elixir-autogen, elixir-format
+msgid "Open Contributions"
+msgstr "Offene Beiträge"
+
+#: lib/mv_web/live/contribution_period_live/show.ex:302
+#, elixir-autogen, elixir-format
+msgid "Paid via bank transfer"
+msgstr "Per Überweisung bezahlt"
+
+#: lib/mv_web/live/contribution_period_live/show.ex:226
+#: lib/mv_web/live/contribution_settings_live.ex:197
+#: lib/mv_web/live/contribution_type_live/index.ex:97
+#, elixir-autogen, elixir-format
+msgid "Preview Mockup"
+msgstr "Vorschau"
+
+#: lib/mv_web/live/contribution_period_live/show.ex:343
+#: lib/mv_web/live/contribution_settings_live.ex:274
+#: lib/mv_web/live/contribution_type_live/index.ex:202
+#, elixir-autogen, elixir-format
+msgid "Quarterly"
+msgstr "Quartalsweise"
+
+#: lib/mv_web/live/contribution_settings_live.ex:139
+#, elixir-autogen, elixir-format
+msgid "Quarterly Interval - Joining Period Excluded"
+msgstr "Quartalsintervall - Eintrittsperiode ausgeschlossen"
+
+#: lib/mv_web/live/contribution_type_live/index.ex:173
+#, elixir-autogen, elixir-format
+msgid "Quarterly fee for family memberships"
+msgstr "Quartalsbeitrag für Familienmitgliedschaften"
+
+#: lib/mv_web/live/contribution_period_live/show.ex:86
+#: lib/mv_web/live/contribution_settings_live.ex:250
+#: lib/mv_web/live/contribution_type_live/index.ex:156
+#, elixir-autogen, elixir-format
+msgid "Reduced"
+msgstr "Ermäßigt"
+
+#: lib/mv_web/live/contribution_type_live/index.ex:157
+#, elixir-autogen, elixir-format
+msgid "Reduced fee for unemployed, pensioners, or low income"
+msgstr "Ermäßigter Beitrag für Arbeitslose, Rentner*innen oder Geringverdienende"
+
+#: lib/mv_web/live/contribution_period_live/show.ex:276
+#: lib/mv_web/live/contribution_settings_live.ex:244
+#: lib/mv_web/live/contribution_type_live/index.ex:148
+#, elixir-autogen, elixir-format
+msgid "Regular"
+msgstr "Regulär"
+
+#: lib/mv_web/live/contribution_period_live/show.ex:204
+#, elixir-autogen, elixir-format
+msgid "Reopen"
+msgstr "Wieder öffnen"
+
+#: lib/mv_web/live/contribution_settings_live.ex:176
+#, elixir-autogen, elixir-format
+msgid "See how the contribution periods will be displayed for an individual member. This example shows Maria Weber with multiple contribution periods."
+msgstr "Sehen Sie, wie die Beitragsperioden für ein einzelnes Mitglied angezeigt werden. Dieses Beispiel zeigt Maria Weber mit mehreren Beitragsperioden."
+
+#: lib/mv_web/live/contribution_type_live/index.ex:149
+#, elixir-autogen, elixir-format
+msgid "Standard membership fee for regular members"
+msgstr "Standard-Mitgliedsbeitrag für reguläre Mitglieder"
+
+#: lib/mv_web/live/contribution_period_live/show.ex:139
+#, elixir-autogen, elixir-format
+msgid "Status"
+msgstr "Status"
+
+#: lib/mv_web/live/contribution_settings_live.ex:256
+#: lib/mv_web/live/contribution_type_live/index.ex:164
+#, elixir-autogen, elixir-format
+msgid "Student"
+msgstr "Student*in"
+
+#: lib/mv_web/live/contribution_type_live/index.ex:180
+#, elixir-autogen, elixir-format
+msgid "Supporting Member"
+msgstr "Fördermitglied"
+
+#: lib/mv_web/live/contribution_period_live/show.ex:195
+#, elixir-autogen, elixir-format
+msgid "Suspend"
+msgstr "Aussetzen"
+
+#: lib/mv_web/live/contribution_period_live/show.ex:260
+#, elixir-autogen, elixir-format
+msgid "Suspended"
+msgstr "Ausgesetzt"
+
+#: lib/mv_web/live/contribution_settings_live.ex:69
+#, elixir-autogen, elixir-format
+msgid "This contribution type is automatically assigned to all new members. Can be changed individually per member."
+msgstr "Diese Beitragsart wird automatisch allen neuen Mitgliedern zugewiesen. Kann pro Mitglied individuell geändert werden."
+
+#: lib/mv_web/live/contribution_period_live/show.ex:228
+#: lib/mv_web/live/contribution_settings_live.ex:199
+#: lib/mv_web/live/contribution_type_live/index.ex:99
+#, elixir-autogen, elixir-format
+msgid "This page is not functional and only displays the planned features."
+msgstr "Diese Seite ist nicht funktional und zeigt nur die geplanten Funktionen."
+
+#: lib/mv_web/live/contribution_period_live/show.ex:136
+#, elixir-autogen, elixir-format
+msgid "Time Period"
+msgstr "Zeitraum"
+
+#: lib/mv_web/live/contribution_period_live/show.ex:66
+#, elixir-autogen, elixir-format
+msgid "Total Contributions"
+msgstr "Beiträge gesamt"
+
+#: lib/mv_web/live/contribution_period_live/show.ex:251
+#, elixir-autogen, elixir-format
+msgid "Unpaid"
+msgstr "Unbezahlt"
+
+#: lib/mv_web/live/contribution_settings_live.ex:183
+#, elixir-autogen, elixir-format
+msgid "View Example Member"
+msgstr "Beispielmitglied ansehen"
+
+#: lib/mv_web/live/contribution_settings_live.ex:90
+#, elixir-autogen, elixir-format
+msgid "When active: Members pay from the period of their joining."
+msgstr "Wenn aktiv: Mitglieder zahlen ab der Periode ihres Eintritts."
+
+#: lib/mv_web/live/contribution_settings_live.ex:93
+#, elixir-autogen, elixir-format
+msgid "When inactive: Members pay from the next full period after joining."
+msgstr "Wenn inaktiv: Mitglieder zahlen ab der nächsten vollen Periode nach dem Eintritt."
+
+#: lib/mv_web/live/contribution_period_live/show.ex:98
+#, elixir-autogen, elixir-format
+msgid "Why are not all contribution types shown?"
+msgstr "Warum werden nicht alle Beitragsarten angezeigt?"
+
+#: lib/mv_web/live/contribution_period_live/show.ex:85
+#: lib/mv_web/live/contribution_period_live/show.ex:86
+#: lib/mv_web/live/contribution_period_live/show.ex:87
+#: lib/mv_web/live/contribution_period_live/show.ex:345
+#: lib/mv_web/live/contribution_settings_live.ex:276
+#: lib/mv_web/live/contribution_type_live/index.ex:204
+#, elixir-autogen, elixir-format
+msgid "Yearly"
+msgstr "Jährlich"
+
+#: lib/mv_web/live/contribution_settings_live.ex:128
+#, elixir-autogen, elixir-format
+msgid "Yearly Interval - Joining Period Excluded"
+msgstr "Jährliches Intervall - Eintrittsperiode ausgeschlossen"
+
+#: lib/mv_web/live/contribution_settings_live.ex:117
+#, elixir-autogen, elixir-format
+msgid "Yearly Interval - Joining Period Included"
+msgstr "Jährliches Intervall - Eintrittsperiode eingeschlossen"
+
 #~ #: lib/mv_web/live/member_live/form.ex:48
 #~ #: lib/mv_web/live/member_live/show.ex:51
 #~ #, elixir-autogen, elixir-format
diff --git a/priv/gettext/default.pot b/priv/gettext/default.pot
index 1e0e954..8594746 100644
--- a/priv/gettext/default.pot
+++ b/priv/gettext/default.pot
@@ -12,6 +12,7 @@ msgid ""
 msgstr ""
 
 #: lib/mv_web/components/core_components.ex:386
+#: lib/mv_web/live/contribution_period_live/show.ex:141
 #, elixir-autogen, elixir-format
 msgid "Actions"
 msgstr ""
@@ -35,12 +36,14 @@ msgstr ""
 msgid "City"
 msgstr ""
 
+#: lib/mv_web/live/contribution_type_live/index.ex:78
 #: lib/mv_web/live/member_live/index.html.heex:250
 #: lib/mv_web/live/user_live/index.html.heex:74
 #, elixir-autogen, elixir-format
 msgid "Delete"
 msgstr ""
 
+#: lib/mv_web/live/contribution_type_live/index.ex:66
 #: lib/mv_web/live/member_live/index.html.heex:242
 #: lib/mv_web/live/user_live/form.ex:265
 #: lib/mv_web/live/user_live/index.html.heex:66
@@ -54,6 +57,7 @@ msgstr ""
 msgid "Edit Member"
 msgstr ""
 
+#: lib/mv_web/live/contribution_period_live/show.ex:58
 #: lib/mv_web/live/member_live/form.ex:47
 #: lib/mv_web/live/member_live/index.html.heex:112
 #: lib/mv_web/live/member_live/show.ex:50
@@ -122,6 +126,7 @@ msgstr ""
 msgid "House Number"
 msgstr ""
 
+#: lib/mv_web/live/contribution_period_live/show.ex:140
 #: lib/mv_web/live/member_live/form.ex:52
 #: lib/mv_web/live/member_live/show.ex:57
 #, elixir-autogen, elixir-format
@@ -130,6 +135,8 @@ msgstr ""
 
 #: lib/mv_web/live/components/payment_filter_component.ex:94
 #: lib/mv_web/live/components/payment_filter_component.ex:144
+#: lib/mv_web/live/contribution_period_live/show.ex:186
+#: lib/mv_web/live/contribution_period_live/show.ex:242
 #: lib/mv_web/live/member_live/form.ex:48
 #: lib/mv_web/live/member_live/index.html.heex:229
 #: lib/mv_web/live/member_live/show.ex:51
@@ -289,7 +296,7 @@ msgstr ""
 msgid "Immutable"
 msgstr ""
 
-#: lib/mv_web/components/layouts/navbar.ex:102
+#: lib/mv_web/components/layouts/navbar.ex:113
 #, elixir-autogen, elixir-format
 msgid "Logout"
 msgstr ""
@@ -306,12 +313,14 @@ msgid "Member"
 msgstr ""
 
 #: lib/mv_web/components/layouts/navbar.ex:25
+#: lib/mv_web/live/contribution_type_live/index.ex:61
 #: lib/mv_web/live/member_live/index.ex:73
 #: lib/mv_web/live/member_live/index.html.heex:3
 #, elixir-autogen, elixir-format
 msgid "Members"
 msgstr ""
 
+#: lib/mv_web/live/contribution_type_live/index.ex:48
 #: lib/mv_web/live/custom_field_live/form.ex:51
 #, elixir-autogen, elixir-format
 msgid "Name"
@@ -332,6 +341,7 @@ msgstr ""
 msgid "Not set"
 msgstr ""
 
+#: lib/mv_web/live/contribution_period_live/show.ex:207
 #: lib/mv_web/live/user_live/form.ex:107
 #: lib/mv_web/live/user_live/form.ex:115
 #: lib/mv_web/live/user_live/form.ex:224
@@ -350,7 +360,7 @@ msgstr ""
 msgid "Password Authentication"
 msgstr ""
 
-#: lib/mv_web/components/layouts/navbar.ex:95
+#: lib/mv_web/components/layouts/navbar.ex:106
 #, elixir-autogen, elixir-format
 msgid "Profil"
 msgstr ""
@@ -370,7 +380,7 @@ msgstr ""
 msgid "Select member"
 msgstr ""
 
-#: lib/mv_web/components/layouts/navbar.ex:99
+#: lib/mv_web/components/layouts/navbar.ex:110
 #, elixir-autogen, elixir-format
 msgid "Settings"
 msgstr ""
@@ -538,14 +548,14 @@ msgstr ""
 msgid "Back to users list"
 msgstr ""
 
-#: lib/mv_web/components/layouts/navbar.ex:33
-#: lib/mv_web/components/layouts/navbar.ex:39
+#: lib/mv_web/components/layouts/navbar.ex:44
+#: lib/mv_web/components/layouts/navbar.ex:50
 #, elixir-autogen, elixir-format
 msgid "Select language"
 msgstr ""
 
-#: lib/mv_web/components/layouts/navbar.ex:46
-#: lib/mv_web/components/layouts/navbar.ex:66
+#: lib/mv_web/components/layouts/navbar.ex:57
+#: lib/mv_web/components/layouts/navbar.ex:77
 #, elixir-autogen, elixir-format
 msgid "Toggle dark mode"
 msgstr ""
@@ -717,6 +727,7 @@ msgstr ""
 msgid "Manage global settings for the association."
 msgstr ""
 
+#: lib/mv_web/live/contribution_settings_live.ex:102
 #: lib/mv_web/live/global_settings_live.ex:56
 #, elixir-autogen, elixir-format
 msgid "Save Settings"
@@ -853,3 +864,429 @@ msgstr ""
 #, elixir-autogen, elixir-format
 msgid "Payment filter"
 msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:107
+#, elixir-autogen, elixir-format
+msgid "%{count} period selected"
+msgid_plural "%{count} periods selected"
+msgstr[0] ""
+msgstr[1] ""
+
+#: lib/mv_web/live/contribution_type_live/index.ex:113
+#, elixir-autogen, elixir-format
+msgid "About Contribution Types"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:138
+#: lib/mv_web/live/contribution_type_live/index.ex:53
+#, elixir-autogen, elixir-format
+msgid "Amount"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:48
+#, elixir-autogen, elixir-format
+msgid "Back to Settings"
+msgstr ""
+
+#: lib/mv_web/live/contribution_type_live/index.ex:124
+#, elixir-autogen, elixir-format
+msgid "Can be changed at any time. Amount changes affect future periods only."
+msgstr ""
+
+#: lib/mv_web/live/contribution_type_live/index.ex:77
+#, elixir-autogen, elixir-format
+msgid "Cannot delete - members assigned"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:83
+#, elixir-autogen, elixir-format
+msgid "Change Contribution Type"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:42
+#, elixir-autogen, elixir-format
+msgid "Configure global settings for membership contributions."
+msgstr ""
+
+#: lib/mv_web/components/layouts/navbar.ex:34
+#: lib/mv_web/live/contribution_settings_live.ex:27
+#: lib/mv_web/live/contribution_settings_live.ex:40
+#, elixir-autogen, elixir-format
+msgid "Contribution Settings"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:62
+#, elixir-autogen, elixir-format
+msgid "Contribution Start"
+msgstr ""
+
+#: lib/mv_web/components/layouts/navbar.ex:32
+#: lib/mv_web/live/contribution_type_live/index.ex:25
+#: lib/mv_web/live/contribution_type_live/index.ex:36
+#, elixir-autogen, elixir-format
+msgid "Contribution Types"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:224
+#, elixir-autogen, elixir-format
+msgid "Contribution start"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:41
+#, elixir-autogen, elixir-format
+msgid "Contribution type"
+msgstr ""
+
+#: lib/mv_web/live/contribution_type_live/index.ex:117
+#, elixir-autogen, elixir-format
+msgid "Contribution types define different membership fee structures. Each type has a fixed interval (monthly, quarterly, half-yearly, yearly) that cannot be changed after creation."
+msgstr ""
+
+#: lib/mv_web/components/layouts/navbar.ex:30
+#, elixir-autogen, elixir-format
+msgid "Contributions"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:39
+#, elixir-autogen, elixir-format
+msgid "Contributions for %{name}"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:159
+#, elixir-autogen, elixir-format
+msgid "Current"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:60
+#, elixir-autogen, elixir-format
+msgid "Default Contribution Type"
+msgstr ""
+
+#: lib/mv_web/live/contribution_type_live/index.ex:133
+#, elixir-autogen, elixir-format
+msgid "Deletion"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:173
+#, elixir-autogen, elixir-format
+msgid "Example: Member Contribution View"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:113
+#, elixir-autogen, elixir-format
+msgid "Examples"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:262
+#: lib/mv_web/live/contribution_type_live/index.ex:172
+#, elixir-autogen, elixir-format
+msgid "Family"
+msgstr ""
+
+#: lib/mv_web/live/contribution_type_live/index.ex:128
+#, elixir-autogen, elixir-format
+msgid "Fixed after creation. Members can only switch between types with the same interval."
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:228
+#, elixir-autogen, elixir-format
+msgid "Generated periods"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:52
+#, elixir-autogen, elixir-format
+msgid "Global Settings"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:344
+#: lib/mv_web/live/contribution_settings_live.ex:275
+#: lib/mv_web/live/contribution_type_live/index.ex:203
+#, elixir-autogen, elixir-format
+msgid "Half-yearly"
+msgstr ""
+
+#: lib/mv_web/live/contribution_type_live/index.ex:181
+#, elixir-autogen, elixir-format
+msgid "Half-yearly contribution for supporting members"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:87
+#: lib/mv_web/live/contribution_type_live/index.ex:188
+#, elixir-autogen, elixir-format
+msgid "Honorary"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:85
+#, elixir-autogen, elixir-format
+msgid "Include joining period"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:137
+#: lib/mv_web/live/contribution_type_live/index.ex:57
+#: lib/mv_web/live/contribution_type_live/index.ex:127
+#, elixir-autogen, elixir-format
+msgid "Interval"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:220
+#, elixir-autogen, elixir-format
+msgid "Joining date"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:332
+#, elixir-autogen, elixir-format
+msgid "Joining year - reduced to 0"
+msgstr ""
+
+#: lib/mv_web/live/contribution_type_live/index.ex:38
+#, elixir-autogen, elixir-format
+msgid "Manage contribution types for membership fees."
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:116
+#, elixir-autogen, elixir-format
+msgid "Mark as Paid"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:120
+#, elixir-autogen, elixir-format
+msgid "Mark as Suspended"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:124
+#, elixir-autogen, elixir-format
+msgid "Mark as Unpaid"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:26
+#, elixir-autogen, elixir-format
+msgid "Member Contributions"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:122
+#, elixir-autogen, elixir-format
+msgid "Member pays for the year they joined"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:155
+#, elixir-autogen, elixir-format
+msgid "Member pays from the joining month"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:144
+#, elixir-autogen, elixir-format
+msgid "Member pays from the next full quarter"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:133
+#, elixir-autogen, elixir-format
+msgid "Member pays from the next full year"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:43
+#, elixir-autogen, elixir-format
+msgid "Member since"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:92
+#, elixir-autogen, elixir-format
+msgid "Members can only switch between contribution types with the same payment interval (e.g., yearly to yearly). This prevents complex period overlaps."
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:342
+#: lib/mv_web/live/contribution_settings_live.ex:273
+#: lib/mv_web/live/contribution_type_live/index.ex:201
+#, elixir-autogen, elixir-format
+msgid "Monthly"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:150
+#, elixir-autogen, elixir-format
+msgid "Monthly Interval - Joining Period Included"
+msgstr ""
+
+#: lib/mv_web/live/contribution_type_live/index.ex:165
+#, elixir-autogen, elixir-format
+msgid "Monthly fee for students and trainees"
+msgstr ""
+
+#: lib/mv_web/live/contribution_type_live/index.ex:123
+#, elixir-autogen, elixir-format
+msgid "Name & Amount"
+msgstr ""
+
+#: lib/mv_web/live/contribution_type_live/index.ex:42
+#, elixir-autogen, elixir-format
+msgid "New Contribution Type"
+msgstr ""
+
+#: lib/mv_web/live/contribution_type_live/index.ex:189
+#, elixir-autogen, elixir-format
+msgid "No fee for honorary members"
+msgstr ""
+
+#: lib/mv_web/live/contribution_type_live/index.ex:134
+#, elixir-autogen, elixir-format
+msgid "Only possible if no members are assigned to this type."
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:70
+#, elixir-autogen, elixir-format
+msgid "Open Contributions"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:302
+#, elixir-autogen, elixir-format
+msgid "Paid via bank transfer"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:226
+#: lib/mv_web/live/contribution_settings_live.ex:197
+#: lib/mv_web/live/contribution_type_live/index.ex:97
+#, elixir-autogen, elixir-format
+msgid "Preview Mockup"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:343
+#: lib/mv_web/live/contribution_settings_live.ex:274
+#: lib/mv_web/live/contribution_type_live/index.ex:202
+#, elixir-autogen, elixir-format
+msgid "Quarterly"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:139
+#, elixir-autogen, elixir-format
+msgid "Quarterly Interval - Joining Period Excluded"
+msgstr ""
+
+#: lib/mv_web/live/contribution_type_live/index.ex:173
+#, elixir-autogen, elixir-format
+msgid "Quarterly fee for family memberships"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:86
+#: lib/mv_web/live/contribution_settings_live.ex:250
+#: lib/mv_web/live/contribution_type_live/index.ex:156
+#, elixir-autogen, elixir-format
+msgid "Reduced"
+msgstr ""
+
+#: lib/mv_web/live/contribution_type_live/index.ex:157
+#, elixir-autogen, elixir-format
+msgid "Reduced fee for unemployed, pensioners, or low income"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:276
+#: lib/mv_web/live/contribution_settings_live.ex:244
+#: lib/mv_web/live/contribution_type_live/index.ex:148
+#, elixir-autogen, elixir-format
+msgid "Regular"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:204
+#, elixir-autogen, elixir-format
+msgid "Reopen"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:176
+#, elixir-autogen, elixir-format
+msgid "See how the contribution periods will be displayed for an individual member. This example shows Maria Weber with multiple contribution periods."
+msgstr ""
+
+#: lib/mv_web/live/contribution_type_live/index.ex:149
+#, elixir-autogen, elixir-format
+msgid "Standard membership fee for regular members"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:139
+#, elixir-autogen, elixir-format
+msgid "Status"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:256
+#: lib/mv_web/live/contribution_type_live/index.ex:164
+#, elixir-autogen, elixir-format
+msgid "Student"
+msgstr ""
+
+#: lib/mv_web/live/contribution_type_live/index.ex:180
+#, elixir-autogen, elixir-format
+msgid "Supporting Member"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:195
+#, elixir-autogen, elixir-format
+msgid "Suspend"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:260
+#, elixir-autogen, elixir-format
+msgid "Suspended"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:69
+#, elixir-autogen, elixir-format
+msgid "This contribution type is automatically assigned to all new members. Can be changed individually per member."
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:228
+#: lib/mv_web/live/contribution_settings_live.ex:199
+#: lib/mv_web/live/contribution_type_live/index.ex:99
+#, elixir-autogen, elixir-format
+msgid "This page is not functional and only displays the planned features."
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:136
+#, elixir-autogen, elixir-format
+msgid "Time Period"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:66
+#, elixir-autogen, elixir-format
+msgid "Total Contributions"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:251
+#, elixir-autogen, elixir-format
+msgid "Unpaid"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:183
+#, elixir-autogen, elixir-format
+msgid "View Example Member"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:90
+#, elixir-autogen, elixir-format
+msgid "When active: Members pay from the period of their joining."
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:93
+#, elixir-autogen, elixir-format
+msgid "When inactive: Members pay from the next full period after joining."
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:98
+#, elixir-autogen, elixir-format
+msgid "Why are not all contribution types shown?"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:85
+#: lib/mv_web/live/contribution_period_live/show.ex:86
+#: lib/mv_web/live/contribution_period_live/show.ex:87
+#: lib/mv_web/live/contribution_period_live/show.ex:345
+#: lib/mv_web/live/contribution_settings_live.ex:276
+#: lib/mv_web/live/contribution_type_live/index.ex:204
+#, elixir-autogen, elixir-format
+msgid "Yearly"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:128
+#, elixir-autogen, elixir-format
+msgid "Yearly Interval - Joining Period Excluded"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:117
+#, elixir-autogen, elixir-format
+msgid "Yearly Interval - Joining Period Included"
+msgstr ""
diff --git a/priv/gettext/en/LC_MESSAGES/default.po b/priv/gettext/en/LC_MESSAGES/default.po
index 319bcc3..cf081bf 100644
--- a/priv/gettext/en/LC_MESSAGES/default.po
+++ b/priv/gettext/en/LC_MESSAGES/default.po
@@ -12,6 +12,7 @@ msgstr ""
 "Plural-Forms: nplurals=2; plural=(n != 1);\n"
 
 #: lib/mv_web/components/core_components.ex:386
+#: lib/mv_web/live/contribution_period_live/show.ex:141
 #, elixir-autogen, elixir-format
 msgid "Actions"
 msgstr ""
@@ -35,12 +36,14 @@ msgstr ""
 msgid "City"
 msgstr ""
 
+#: lib/mv_web/live/contribution_type_live/index.ex:78
 #: lib/mv_web/live/member_live/index.html.heex:250
 #: lib/mv_web/live/user_live/index.html.heex:74
 #, elixir-autogen, elixir-format
 msgid "Delete"
 msgstr ""
 
+#: lib/mv_web/live/contribution_type_live/index.ex:66
 #: lib/mv_web/live/member_live/index.html.heex:242
 #: lib/mv_web/live/user_live/form.ex:265
 #: lib/mv_web/live/user_live/index.html.heex:66
@@ -54,6 +57,7 @@ msgstr ""
 msgid "Edit Member"
 msgstr ""
 
+#: lib/mv_web/live/contribution_period_live/show.ex:58
 #: lib/mv_web/live/member_live/form.ex:47
 #: lib/mv_web/live/member_live/index.html.heex:112
 #: lib/mv_web/live/member_live/show.ex:50
@@ -122,6 +126,7 @@ msgstr ""
 msgid "House Number"
 msgstr ""
 
+#: lib/mv_web/live/contribution_period_live/show.ex:140
 #: lib/mv_web/live/member_live/form.ex:52
 #: lib/mv_web/live/member_live/show.ex:57
 #, elixir-autogen, elixir-format
@@ -130,6 +135,8 @@ msgstr ""
 
 #: lib/mv_web/live/components/payment_filter_component.ex:94
 #: lib/mv_web/live/components/payment_filter_component.ex:144
+#: lib/mv_web/live/contribution_period_live/show.ex:186
+#: lib/mv_web/live/contribution_period_live/show.ex:242
 #: lib/mv_web/live/member_live/form.ex:48
 #: lib/mv_web/live/member_live/index.html.heex:229
 #: lib/mv_web/live/member_live/show.ex:51
@@ -289,7 +296,7 @@ msgstr ""
 msgid "Immutable"
 msgstr ""
 
-#: lib/mv_web/components/layouts/navbar.ex:102
+#: lib/mv_web/components/layouts/navbar.ex:113
 #, elixir-autogen, elixir-format
 msgid "Logout"
 msgstr ""
@@ -306,12 +313,14 @@ msgid "Member"
 msgstr ""
 
 #: lib/mv_web/components/layouts/navbar.ex:25
+#: lib/mv_web/live/contribution_type_live/index.ex:61
 #: lib/mv_web/live/member_live/index.ex:73
 #: lib/mv_web/live/member_live/index.html.heex:3
 #, elixir-autogen, elixir-format
 msgid "Members"
 msgstr ""
 
+#: lib/mv_web/live/contribution_type_live/index.ex:48
 #: lib/mv_web/live/custom_field_live/form.ex:51
 #, elixir-autogen, elixir-format
 msgid "Name"
@@ -332,6 +341,7 @@ msgstr ""
 msgid "Not set"
 msgstr ""
 
+#: lib/mv_web/live/contribution_period_live/show.ex:207
 #: lib/mv_web/live/user_live/form.ex:107
 #: lib/mv_web/live/user_live/form.ex:115
 #: lib/mv_web/live/user_live/form.ex:224
@@ -350,7 +360,7 @@ msgstr ""
 msgid "Password Authentication"
 msgstr ""
 
-#: lib/mv_web/components/layouts/navbar.ex:95
+#: lib/mv_web/components/layouts/navbar.ex:106
 #, elixir-autogen, elixir-format
 msgid "Profil"
 msgstr ""
@@ -370,7 +380,7 @@ msgstr ""
 msgid "Select member"
 msgstr ""
 
-#: lib/mv_web/components/layouts/navbar.ex:99
+#: lib/mv_web/components/layouts/navbar.ex:110
 #, elixir-autogen, elixir-format
 msgid "Settings"
 msgstr ""
@@ -538,14 +548,14 @@ msgstr ""
 msgid "Back to users list"
 msgstr ""
 
-#: lib/mv_web/components/layouts/navbar.ex:33
-#: lib/mv_web/components/layouts/navbar.ex:39
+#: lib/mv_web/components/layouts/navbar.ex:44
+#: lib/mv_web/components/layouts/navbar.ex:50
 #, elixir-autogen, elixir-format, fuzzy
 msgid "Select language"
 msgstr ""
 
-#: lib/mv_web/components/layouts/navbar.ex:46
-#: lib/mv_web/components/layouts/navbar.ex:66
+#: lib/mv_web/components/layouts/navbar.ex:57
+#: lib/mv_web/components/layouts/navbar.ex:77
 #, elixir-autogen, elixir-format
 msgid "Toggle dark mode"
 msgstr ""
@@ -717,6 +727,7 @@ msgstr ""
 msgid "Manage global settings for the association."
 msgstr ""
 
+#: lib/mv_web/live/contribution_settings_live.ex:102
 #: lib/mv_web/live/global_settings_live.ex:56
 #, elixir-autogen, elixir-format, fuzzy
 msgid "Save Settings"
@@ -854,8 +865,440 @@ msgstr ""
 msgid "Payment filter"
 msgstr ""
 
+#: lib/mv_web/live/contribution_period_live/show.ex:107
+#, elixir-autogen, elixir-format
+msgid "%{count} period selected"
+msgid_plural "%{count} periods selected"
+msgstr[0] ""
+msgstr[1] ""
+
+#: lib/mv_web/live/contribution_type_live/index.ex:113
+#, elixir-autogen, elixir-format
+msgid "About Contribution Types"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:138
+#: lib/mv_web/live/contribution_type_live/index.ex:53
+#, elixir-autogen, elixir-format
+msgid "Amount"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:48
+#, elixir-autogen, elixir-format
+msgid "Back to Settings"
+msgstr ""
+
+#: lib/mv_web/live/contribution_type_live/index.ex:124
+#, elixir-autogen, elixir-format
+msgid "Can be changed at any time. Amount changes affect future periods only."
+msgstr ""
+
+#: lib/mv_web/live/contribution_type_live/index.ex:77
+#, elixir-autogen, elixir-format
+msgid "Cannot delete - members assigned"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:83
+#, elixir-autogen, elixir-format
+msgid "Change Contribution Type"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:42
+#, elixir-autogen, elixir-format
+msgid "Configure global settings for membership contributions."
+msgstr ""
+
+#: lib/mv_web/components/layouts/navbar.ex:34
+#: lib/mv_web/live/contribution_settings_live.ex:27
+#: lib/mv_web/live/contribution_settings_live.ex:40
+#, elixir-autogen, elixir-format
+msgid "Contribution Settings"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:62
+#, elixir-autogen, elixir-format
+msgid "Contribution Start"
+msgstr ""
+
+#: lib/mv_web/components/layouts/navbar.ex:32
+#: lib/mv_web/live/contribution_type_live/index.ex:25
+#: lib/mv_web/live/contribution_type_live/index.ex:36
+#, elixir-autogen, elixir-format
+msgid "Contribution Types"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:224
+#, elixir-autogen, elixir-format
+msgid "Contribution start"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:41
+#, elixir-autogen, elixir-format
+msgid "Contribution type"
+msgstr ""
+
+#: lib/mv_web/live/contribution_type_live/index.ex:117
+#, elixir-autogen, elixir-format
+msgid "Contribution types define different membership fee structures. Each type has a fixed interval (monthly, quarterly, half-yearly, yearly) that cannot be changed after creation."
+msgstr ""
+
+#: lib/mv_web/components/layouts/navbar.ex:30
+#, elixir-autogen, elixir-format
+msgid "Contributions"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:39
+#, elixir-autogen, elixir-format
+msgid "Contributions for %{name}"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:159
+#, elixir-autogen, elixir-format
+msgid "Current"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:60
+#, elixir-autogen, elixir-format
+msgid "Default Contribution Type"
+msgstr ""
+
+#: lib/mv_web/live/contribution_type_live/index.ex:133
+#, elixir-autogen, elixir-format, fuzzy
+msgid "Deletion"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:173
+#, elixir-autogen, elixir-format
+msgid "Example: Member Contribution View"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:113
+#, elixir-autogen, elixir-format
+msgid "Examples"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:262
+#: lib/mv_web/live/contribution_type_live/index.ex:172
+#, elixir-autogen, elixir-format
+msgid "Family"
+msgstr ""
+
+#: lib/mv_web/live/contribution_type_live/index.ex:128
+#, elixir-autogen, elixir-format
+msgid "Fixed after creation. Members can only switch between types with the same interval."
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:228
+#, elixir-autogen, elixir-format
+msgid "Generated periods"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:52
+#, elixir-autogen, elixir-format, fuzzy
+msgid "Global Settings"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:344
+#: lib/mv_web/live/contribution_settings_live.ex:275
+#: lib/mv_web/live/contribution_type_live/index.ex:203
+#, elixir-autogen, elixir-format
+msgid "Half-yearly"
+msgstr ""
+
+#: lib/mv_web/live/contribution_type_live/index.ex:181
+#, elixir-autogen, elixir-format
+msgid "Half-yearly contribution for supporting members"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:87
+#: lib/mv_web/live/contribution_type_live/index.ex:188
+#, elixir-autogen, elixir-format
+msgid "Honorary"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:85
+#, elixir-autogen, elixir-format
+msgid "Include joining period"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:137
+#: lib/mv_web/live/contribution_type_live/index.ex:57
+#: lib/mv_web/live/contribution_type_live/index.ex:127
+#, elixir-autogen, elixir-format
+msgid "Interval"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:220
+#, elixir-autogen, elixir-format, fuzzy
+msgid "Joining date"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:332
+#, elixir-autogen, elixir-format
+msgid "Joining year - reduced to 0"
+msgstr ""
+
+#: lib/mv_web/live/contribution_type_live/index.ex:38
+#, elixir-autogen, elixir-format
+msgid "Manage contribution types for membership fees."
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:116
+#, elixir-autogen, elixir-format
+msgid "Mark as Paid"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:120
+#, elixir-autogen, elixir-format
+msgid "Mark as Suspended"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:124
+#, elixir-autogen, elixir-format
+msgid "Mark as Unpaid"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:26
+#, elixir-autogen, elixir-format
+msgid "Member Contributions"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:122
+#, elixir-autogen, elixir-format
+msgid "Member pays for the year they joined"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:155
+#, elixir-autogen, elixir-format
+msgid "Member pays from the joining month"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:144
+#, elixir-autogen, elixir-format
+msgid "Member pays from the next full quarter"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:133
+#, elixir-autogen, elixir-format
+msgid "Member pays from the next full year"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:43
+#, elixir-autogen, elixir-format, fuzzy
+msgid "Member since"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:92
+#, elixir-autogen, elixir-format
+msgid "Members can only switch between contribution types with the same payment interval (e.g., yearly to yearly). This prevents complex period overlaps."
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:342
+#: lib/mv_web/live/contribution_settings_live.ex:273
+#: lib/mv_web/live/contribution_type_live/index.ex:201
+#, elixir-autogen, elixir-format
+msgid "Monthly"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:150
+#, elixir-autogen, elixir-format
+msgid "Monthly Interval - Joining Period Included"
+msgstr ""
+
+#: lib/mv_web/live/contribution_type_live/index.ex:165
+#, elixir-autogen, elixir-format
+msgid "Monthly fee for students and trainees"
+msgstr ""
+
+#: lib/mv_web/live/contribution_type_live/index.ex:123
+#, elixir-autogen, elixir-format
+msgid "Name & Amount"
+msgstr ""
+
+#: lib/mv_web/live/contribution_type_live/index.ex:42
+#, elixir-autogen, elixir-format
+msgid "New Contribution Type"
+msgstr ""
+
+#: lib/mv_web/live/contribution_type_live/index.ex:189
+#, elixir-autogen, elixir-format
+msgid "No fee for honorary members"
+msgstr ""
+
+#: lib/mv_web/live/contribution_type_live/index.ex:134
+#, elixir-autogen, elixir-format
+msgid "Only possible if no members are assigned to this type."
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:70
+#, elixir-autogen, elixir-format
+msgid "Open Contributions"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:302
+#, elixir-autogen, elixir-format
+msgid "Paid via bank transfer"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:226
+#: lib/mv_web/live/contribution_settings_live.ex:197
+#: lib/mv_web/live/contribution_type_live/index.ex:97
+#, elixir-autogen, elixir-format
+msgid "Preview Mockup"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:343
+#: lib/mv_web/live/contribution_settings_live.ex:274
+#: lib/mv_web/live/contribution_type_live/index.ex:202
+#, elixir-autogen, elixir-format
+msgid "Quarterly"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:139
+#, elixir-autogen, elixir-format
+msgid "Quarterly Interval - Joining Period Excluded"
+msgstr ""
+
+#: lib/mv_web/live/contribution_type_live/index.ex:173
+#, elixir-autogen, elixir-format
+msgid "Quarterly fee for family memberships"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:86
+#: lib/mv_web/live/contribution_settings_live.ex:250
+#: lib/mv_web/live/contribution_type_live/index.ex:156
+#, elixir-autogen, elixir-format
+msgid "Reduced"
+msgstr ""
+
+#: lib/mv_web/live/contribution_type_live/index.ex:157
+#, elixir-autogen, elixir-format
+msgid "Reduced fee for unemployed, pensioners, or low income"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:276
+#: lib/mv_web/live/contribution_settings_live.ex:244
+#: lib/mv_web/live/contribution_type_live/index.ex:148
+#, elixir-autogen, elixir-format
+msgid "Regular"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:204
+#, elixir-autogen, elixir-format
+msgid "Reopen"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:176
+#, elixir-autogen, elixir-format
+msgid "See how the contribution periods will be displayed for an individual member. This example shows Maria Weber with multiple contribution periods."
+msgstr ""
+
+#: lib/mv_web/live/contribution_type_live/index.ex:149
+#, elixir-autogen, elixir-format
+msgid "Standard membership fee for regular members"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:139
+#, elixir-autogen, elixir-format
+msgid "Status"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:256
+#: lib/mv_web/live/contribution_type_live/index.ex:164
+#, elixir-autogen, elixir-format
+msgid "Student"
+msgstr ""
+
+#: lib/mv_web/live/contribution_type_live/index.ex:180
+#, elixir-autogen, elixir-format
+msgid "Supporting Member"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:195
+#, elixir-autogen, elixir-format
+msgid "Suspend"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:260
+#, elixir-autogen, elixir-format
+msgid "Suspended"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:69
+#, elixir-autogen, elixir-format
+msgid "This contribution type is automatically assigned to all new members. Can be changed individually per member."
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:228
+#: lib/mv_web/live/contribution_settings_live.ex:199
+#: lib/mv_web/live/contribution_type_live/index.ex:99
+#, elixir-autogen, elixir-format
+msgid "This page is not functional and only displays the planned features."
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:136
+#, elixir-autogen, elixir-format
+msgid "Time Period"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:66
+#, elixir-autogen, elixir-format
+msgid "Total Contributions"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:251
+#, elixir-autogen, elixir-format
+msgid "Unpaid"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:183
+#, elixir-autogen, elixir-format
+msgid "View Example Member"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:90
+#, elixir-autogen, elixir-format
+msgid "When active: Members pay from the period of their joining."
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:93
+#, elixir-autogen, elixir-format
+msgid "When inactive: Members pay from the next full period after joining."
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:98
+#, elixir-autogen, elixir-format
+msgid "Why are not all contribution types shown?"
+msgstr ""
+
+#: lib/mv_web/live/contribution_period_live/show.ex:85
+#: lib/mv_web/live/contribution_period_live/show.ex:86
+#: lib/mv_web/live/contribution_period_live/show.ex:87
+#: lib/mv_web/live/contribution_period_live/show.ex:345
+#: lib/mv_web/live/contribution_settings_live.ex:276
+#: lib/mv_web/live/contribution_type_live/index.ex:204
+#, elixir-autogen, elixir-format
+msgid "Yearly"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:128
+#, elixir-autogen, elixir-format
+msgid "Yearly Interval - Joining Period Excluded"
+msgstr ""
+
+#: lib/mv_web/live/contribution_settings_live.ex:117
+#, elixir-autogen, elixir-format
+msgid "Yearly Interval - Joining Period Included"
+msgstr ""
+
 #~ #: lib/mv_web/live/member_live/form.ex:48
 #~ #: lib/mv_web/live/member_live/show.ex:51
 #~ #, elixir-autogen, elixir-format
 #~ msgid "Birth Date"
 #~ msgstr ""
+
+#~ #: lib/mv_web/live/contribution_period_live/show.ex:273
+#~ #: lib/mv_web/live/contribution_settings_live.ex:248
+#~ #, elixir-autogen, elixir-format
+#~ msgid "Related Pages"
+#~ msgstr ""
-- 
2.47.2


From 4057b2d631884be83d2405f5b38d39b16383d56b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rafael=20Eppl=C3=A9e?= <hello@rafa.ee>
Date: Wed, 3 Dec 2025 14:06:24 +0100
Subject: [PATCH 4/4] Extend gettext conflict script to other conflict marker
 styles

---
 Justfile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Justfile b/Justfile
index 876591d..25fb35c 100644
--- a/Justfile
+++ b/Justfile
@@ -90,7 +90,7 @@ clean:
 remove-gettext-conflicts:
   #!/usr/bin/env bash
   set -euo pipefail
-  find priv/gettext -type f -exec sed -i '/^<<<<<<< HEAD$/d; /^=======$/d; /^>>>>>>>/d' {} \;
+  find priv/gettext -type f -exec sed -i '/^<<<<<<</d; /^=======$/d; /^>>>>>>>/d; /^%%%%%%%/d; /^++++++/d; s/^+//' {} \;
 
 # Production environment commands
 # ================================
-- 
2.47.2