Add Mitgliederverwaltungs-UI (Phase 1 MVP)

- List view with live search and member count
- Create form (/mitglieder/neu) with group checkboxes
- Detail/Edit view with inline edit toggle
- Delete with confirmation dialog
- Makefile: skip migration files already on DS (avoid root permission error)

Makefile

@@ -73,11 +73,15 @@ deploy: check-ssh
 			cat "$$f" | ssh $(DS_HOST) "cat > $(HOOKS_DST)/$$(basename $$f)"; \
 		done; \
 	fi
-	@echo "→ PocketBase Migrations synchronisieren..."
+	@echo "→ PocketBase Migrations synchronisieren (nur neue)..."
 	@ssh $(DS_HOST) "mkdir -p $(MIGRATIONS_DST)"
 	@if ls $(MIGRATIONS_SRC)/*.js 2>/dev/null | grep -q .; then \
 		for f in $(MIGRATIONS_SRC)/*.js; do \
-			cat "$$f" | ssh $(DS_HOST) "cat > $(MIGRATIONS_DST)/$$(basename $$f)"; \
+			fname=$$(basename "$$f"); \
+			if ! ssh $(DS_HOST) "test -f $(MIGRATIONS_DST)/$$fname" 2>/dev/null; then \
+				cat "$$f" | ssh $(DS_HOST) "cat > $(MIGRATIONS_DST)/$$fname"; \
+				echo "  ✓ $$fname"; \
+			fi; \
 		done; \
 	fi
 	@echo "→ Docker rebuild + restart..."