feat(memory): v7 — Gedächtnis-Layer mit MCP-Integration

SQLite-basiertes Memory-System fuer persistentes Gedaechtnis ueber Sessions.
Cline, OpenCode und Claude Code teilen denselben Speicher via MCP-Server.

- routers/memory.py: CRUD + Export-Endpoint (GET/POST/PUT/DELETE /api/memory)
- mcp_memory.py: stdio MCP-Server — Tools: get/add/search/update/delete_memory
- MemoryPanel.svelte: Gedaechtnis-Tab mit Filter, Inline-Edit, Add-Formular
- ConnectPanel.svelte: Gedaechtnis-MCP Setup-Guide (Cline/OpenCode/Bosgame)
- Temporaere Eintraege (ephemeral) nach 7 Tagen automatisch geloescht

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

static/index.html

@@ -22,6 +22,7 @@
       <a class="nav-item" data-view="connect"><span class="ni-ic" data-ic="swap"></span><span class="ni-tx">Verbinden</span></a>
       <a class="nav-item" data-view="news"><span class="ni-ic" data-ic="info"></span><span class="ni-tx">News</span></a>
       <a class="nav-item" data-view="guides"><span class="ni-ic" data-ic="help"></span><span class="ni-tx">Guides</span></a>
+      <a class="nav-item" data-view="memory"><span class="ni-ic" data-ic="database"></span><span class="ni-tx">Gedächtnis</span></a>
     </nav>
     <div class="side-foot">
       <span class="nav-item" id="nav-settings"><span class="ni-ic" data-ic="settings"></span><span class="ni-tx">Einstellungen</span></span>
@@ -48,6 +49,7 @@
       <section class="view" data-view="connect" hidden></section>
       <section class="view" data-view="news" hidden></section>
       <section class="view" data-view="guides" hidden></section>
+      <section class="view" data-view="memory" hidden></section>
     </main>
   </div>
 </div>