Add crimata-agent and redesign agentic OS UI

- crimata-agent (TypeScript, port 7702): WebSocket server + HTTP /events
  endpoint, Claude tool-use loop (render/remove/call_api/show_cursor_response),
  session.start fires on first browser connection to seed the canvas
- OS UI redesigned: light grey canvas (#e8e8e8), no dock bar, cursor dot,
  Cmd+Space input bubble above cursor, elements placed by agent
- Canvas elements: app_icon (floating icons with running dot), window (no-chrome
  content cards), cursor_response (text + action pills)
- Component system: HTML fragments fetched from /components/{app}/{name}.html,
  inline scripts re-executed after injection
- contacts/crimata.json: added icon, defaultComponent, components[], api[]
- dock: apps.h/c/main.c extended to parse and serve components + api from
  crimata.json; BUF_SIZE increased for richer JSON output
- ui/components/contacts/list.html + card.html: first component pair
- provision.sh: installs crimata-agent, adds WebSocket + /events + /components
  nginx locations, fixes /auth/ prefix stripping

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

apps/contacts/crimata.json

@@ -1,7 +1,54 @@
 {
   "id": "contacts",
   "name": "Contacts",
+  "icon": "👤",
   "port": 3001,
+  "defaultComponent": "contacts.list",
+  "components": ["contacts.list", "contacts.card"],
   "db": true,
-  "migrate": "npm run migrate"
+  "migrate": "npm run migrate",
+  "api": [
+    {
+      "name": "list_contacts",
+      "description": "Get all contacts ordered by name",
+      "method": "GET",
+      "endpoint": "/contacts"
+    },
+    {
+      "name": "get_contact",
+      "description": "Get a single contact by ID",
+      "method": "GET",
+      "endpoint": "/contacts/:id"
+    },
+    {
+      "name": "create_contact",
+      "description": "Create a new contact (name and domain required)",
+      "method": "POST",
+      "endpoint": "/contacts",
+      "body": {
+        "name": "string",
+        "domain": "string",
+        "avatar_url": "string?",
+        "notes": "string?"
+      }
+    },
+    {
+      "name": "update_contact",
+      "description": "Partially update a contact by ID",
+      "method": "PATCH",
+      "endpoint": "/contacts/:id",
+      "body": {
+        "name": "string?",
+        "domain": "string?",
+        "avatar_url": "string?",
+        "notes": "string?"
+      }
+    },
+    {
+      "name": "delete_contact",
+      "description": "Delete a contact by ID",
+      "method": "DELETE",
+      "endpoint": "/contacts/:id"
+    }
+  ]
 }