feat: add groups to search vector

Co-authored-by: Cursor <cursoragent@cursor.com>

docs/database-schema-readme.md

@@ -233,16 +233,23 @@ Settings (1) → MembershipFeeType (0..1)
 ## Full-Text Search
 
 ### Implementation
-- **Trigger:** `members_search_vector_trigger()`
-- **Function:** Automatically updates `search_vector` on INSERT/UPDATE
+- **Trigger:** `members_search_vector_trigger()` on `members` (INSERT/UPDATE)
+- **Trigger:** `update_member_search_vector_from_member_groups()` on `member_groups` (INSERT/UPDATE/DELETE)
+- **Function:** Automatically updates `search_vector` on member and member_groups changes
 - **Index Type:** GIN (Generalized Inverted Index)
 
 ### Weighted Fields
 - **Weight A (highest):** first_name, last_name
-- **Weight B:** email, notes
+- **Weight B:** email, notes, group names (from member_groups → groups)
 - **Weight C:** city, street, house_number, postal_code, custom_field_values
 - **Weight D (lowest):** join_date, exit_date
 
+### Group Names in Search
+Group names are included in the member search vector so that searching for a group name (e.g. "Vorstand") finds all members in that group:
+- Group names are aggregated from `member_groups` joined with `groups` and receive weight 'B'
+- The trigger `update_member_search_vector_on_member_groups_change` runs on INSERT/UPDATE/DELETE on `member_groups` and refreshes the affected member's `search_vector`
+- See migration `20260217120000_add_group_names_to_member_search_vector.exs` (Issue #375)
+
 ### Custom Field Values in Search
 Custom field values are automatically included in the search vector:
 - All custom field values (string, integer, boolean, date, email) are aggregated and added to the search vector

docs/feature-roadmap.md

@@ -81,12 +81,13 @@
 - ✅ User-Member linking (optional 1:1)
 - ✅ Email synchronization between User and Member
 - ✅ **Bulk email copy** - Copy selected members' email addresses to clipboard (Issue #230)
-- ✅ **Groups** - Organize members into groups (PR #378, #382, closes #371, #372, 2026-01-27)
+- ✅ **Groups** - Organize members into groups (PR #378, #382, #423, closes #371, #372, #374, #375, 2026-01/02)
   - Many-to-many relationship with groups
   - Groups management UI (`/groups`)
   - Filter and sort by groups in member list
   - Per-group filter in member list: one row per group with All / Yes / No (All/Alle); URL params `group_<uuid>=in|not_in`
   - Groups displayed in member overview and detail views
+  - Member search includes group names (search by group name finds members in that group; search_vector + trigger on member_groups)
 - ✅ **CSV Import** - Import members from CSV files (PR #359, #394, #395, closes #335, #336, #338, 2026-01-27)
   - Member field import
   - Custom field value import
@@ -97,6 +98,7 @@
 - ✅ [#162](https://git.local-it.org/local-it/mitgliederverwaltung/issues/162) - Fuzzy and substring search (closed 2025-11-12)
 - ✅ [#371](https://git.local-it.org/local-it/mitgliederverwaltung/issues/371) - Add groups resource (closed 2026-01-27)
 - ✅ [#372](https://git.local-it.org/local-it/mitgliederverwaltung/issues/372) - Groups Admin UI (closed 2026-01-27)
+- ✅ [#375](https://git.local-it.org/local-it/mitgliederverwaltung/issues/375) - Search Integration (group names in member search) (implemented 2026-02-17)
 - ✅ [#335](https://git.local-it.org/local-it/mitgliederverwaltung/issues/335) - CSV Import UI (closed 2026-01-27)
 - ✅ [#336](https://git.local-it.org/local-it/mitgliederverwaltung/issues/336) - Config for import limits (closed 2026-01-27)
 - ✅ [#338](https://git.local-it.org/local-it/mitgliederverwaltung/issues/338) - Custom field CSV import (closed 2026-01-27)

docs/groups-architecture.md

@@ -975,9 +975,11 @@ Each functional unit can be implemented as a **separate issue**:
 ### Issue 5: Search Integration
 **Type:** Backend  
 **Estimation:** 2h  
+**Status:** ✅ Implemented (migration `20260217120000_add_group_names_to_member_search_vector.exs`, Issue #375)
+
 **Tasks:**
 - Update search vector trigger to include group names
-- Extend fuzzy search to search group names
+- Extend fuzzy search to search group names (via search_vector; no Elixir change needed)
 - Test search functionality
 
 **Acceptance Criteria:**