feat(sprint8): Phase 3 — Mitgliederversammlung (assemblies, voting, protocol PDF)

Backend:
- V19 migration: assemblies, assembly_agenda_items, assembly_attendees, assembly_votes, assembly_vote_records
- Enums: AssemblyType, AssemblyStatus, AgendaItemType, VoteType, VoteDecision, VoteResult
- Entities: Assembly, AssemblyAgendaItem, AssemblyAttendee, AssemblyVote, AssemblyVoteRecord
- Repositories: Assembly, AgendaItem, Attendee, Vote, VoteRecord
- AssemblyService: full lifecycle (create, invite, start, attend, vote, quorum, complete)
- AssemblyProtocolService: OpenPDF protocol generation (§147 AO compliant)
- AssemblyController: admin + portal endpoints
- Extended: AuditEventType, NotificationType, StaffPermission

Frontend:
- Assembly service with full API client and TypeScript types
- Admin assemblies list page with create dialog (agenda builder)
- Admin assembly detail page (quorum, agenda, votes, attendees)
- Navigation: Versammlungen with Gavel icon (after Finanzen)

Legal basis: §32-§40 BGB (Mitgliederversammlung), §147 AO (retention)

cannamanage-frontend/src/hooks/use-forum-subscription.ts

@@ -1,6 +1,6 @@
 "use client"
 
-import { useEffect, useCallback, useRef } from "react"
+import { useEffect, useRef } from "react"
 
 /**
  * Hook to subscribe to forum WebSocket events for a specific club.
@@ -12,6 +12,7 @@ export function useForumSubscription(
   onNewTopic?: (data: ForumTopicEvent) => void,
   onNewReply?: (data: ForumReplyEvent) => void
 ) {
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
   const stompClientRef = useRef<any>(null)
 
   useEffect(() => {
@@ -41,12 +42,15 @@ export function useForumSubscription(
 
           // Subscribe to specific topic if provided
           if (topicId) {
-            client.subscribe(`/topic/club.${clubId}.forum.${topicId}`, (message) => {
-              const data = JSON.parse(message.body)
-              if (data.type === "NEW_REPLY" && onNewReply) {
-                onNewReply(data as ForumReplyEvent)
+            client.subscribe(
+              `/topic/club.${clubId}.forum.${topicId}`,
+              (message) => {
+                const data = JSON.parse(message.body)
+                if (data.type === "NEW_REPLY" && onNewReply) {
+                  onNewReply(data as ForumReplyEvent)
+                }
               }
-            })
+            )
           }
         }
 

cannamanage-frontend/src/hooks/use-info-board-subscription.ts

@@ -10,6 +10,7 @@ export function useInfoBoardSubscription(
   clubId: string | undefined,
   onNewPost?: (data: InfoBoardPostEvent) => void
 ) {
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
   const stompClientRef = useRef<any>(null)
 
   useEffect(() => {