feat: complete AIUI integration — all 31 overnight tasks

- Protocol: 10 context categories (apps, system, network, bitcoin, media, files, notes, search, ai-local, wallet)
- ContextBroker: real data wiring for all categories with sanitization
- Permissions: user toggles for all categories in Settings
- Nginx: Claude API, OpenRouter, SearXNG proxy pass-through
- Actions: launch-app, search-web, install-app handlers
- Chat.vue: loading state + connection indicator
- Integration test page: test-aiui.html

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

image-recipe/configs/nginx-archipelago.conf

@@ -12,6 +12,45 @@ server {
         try_files $uri $uri/ /aiui/index.html;
     }
 
+    # AIUI Claude API proxy — forwards API key from AIUI request headers
+    location /aiui/api/claude/ {
+        proxy_pass https://api.anthropic.com/;
+        proxy_http_version 1.1;
+        proxy_set_header Host api.anthropic.com;
+        proxy_set_header Connection "";
+        proxy_ssl_server_name on;
+        proxy_connect_timeout 120s;
+        proxy_read_timeout 120s;
+        proxy_send_timeout 120s;
+    }
+
+    # AIUI OpenRouter API proxy
+    location /aiui/api/openrouter/ {
+        proxy_pass https://openrouter.ai/api/;
+        proxy_http_version 1.1;
+        proxy_set_header Host openrouter.ai;
+        proxy_set_header Connection "";
+        proxy_ssl_server_name on;
+        proxy_connect_timeout 120s;
+        proxy_read_timeout 120s;
+        proxy_send_timeout 120s;
+    }
+
+    # AIUI web search proxy — SearXNG on port 8888
+    location /aiui/api/web-search {
+        proxy_pass http://127.0.0.1:8888/search;
+        proxy_http_version 1.1;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_connect_timeout 30s;
+        proxy_read_timeout 30s;
+        error_page 502 503 =503 @searxng_unavailable;
+    }
+    location @searxng_unavailable {
+        default_type application/json;
+        return 503 '{"error":"SearXNG is not running"}';
+    }
+
     # Serve static files (Vue.js SPA)
     location / {
         try_files $uri $uri/ /index.html;