feat: add bulk email copy for selected members (#230)

Copy selected members' emails to clipboard in 'First Last <email>' format

docs/development-progress-log.md

@@ -1327,6 +1327,33 @@ end
 
 ---
 
+## Session: Bulk Email Copy Feature (2025-12-02)
+
+### Feature Summary
+Implemented bulk email copy functionality for selected members (#230). Users can select members and copy their email addresses to clipboard.
+
+**Key Features:**
+- Copy button appears only when visible members are selected
+- Email format: `First Last <email>` with semicolon separator (email client compatible)
+- Button shows count of visible selected members (respects search/filter)
+- CopyToClipboard JavaScript hook with clipboard API + fallback for older browsers
+- Bilingual UI (English/German)
+
+### Key Decisions
+
+1. **Email Format:** "First Last <email>" with semicolon - standard for all major email clients
+2. **Visible Member Count:** Button shows only visible selected members, not total selected (better UX when filtering)
+3. **Server→Client:** Used `push_event/3` - server formats data, client handles clipboard
+
+### Files Changed
+- `lib/mv_web/live/member_live/index.ex` - Event handler, helper function
+- `lib/mv_web/live/member_live/index.html.heex` - Copy button
+- `assets/js/app.js` - CopyToClipboard hook
+- `test/mv_web/member_live/index_test.exs` - 9 new tests
+- `priv/gettext/de/LC_MESSAGES/default.po` - German translations
+
+---
+
 ## Session: User-Member Linking UI Enhancement (2025-01-13)
 
 ### Feature Summary
@@ -1559,8 +1586,8 @@ This project demonstrates a modern Phoenix application built with:
 
 ---
 
-**Document Version:** 1.2  
-**Last Updated:** 2025-11-27  
+**Document Version:** 1.3  
+**Last Updated:** 2025-12-02  
 **Maintainer:** Development Team  
 **Status:** Living Document (update as project evolves)