feat: Major UI improvements and SSH-only mode

- Tool rendering: Unified tool_use/tool_result cards with collapsible results
- Special rendering for WebSearch, WebFetch, Task, Write tools
- File upload support with drag & drop
- Permission dialog for tool approvals
- Status bar with session stats and permission mode toggle
- SSH-only mode: Removed local container execution
- Host switching disabled during active session with visual indicator
- Directory browser: Browse remote directories via SSH
- Recent directories dropdown with localStorage persistence
- Follow-up messages during generation
- Improved scroll behavior with "back to bottom" button

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

docker-compose.yml

@@ -3,9 +3,17 @@ services:
     build:
       context: ./backend
       dockerfile: Dockerfile
+      network: host
     container_name: claude-webui-backend
     restart: unless-stopped
     network_mode: host
+    deploy:
+      resources:
+        limits:
+          memory: 2G
+          cpus: '2'
+        reservations:
+          memory: 512M
     volumes:
       # Claude CLI binary (read-only from host)
       - /home/sumdex/.local/share/claude:/home/node/.local/share/claude:ro
@@ -31,6 +39,7 @@ services:
     build:
       context: ./frontend
       dockerfile: Dockerfile
+      network: host
       args:
         - VITE_WS_URL=ws://100.105.142.13:3001
         - VITE_API_URL=http://100.105.142.13:3001