fix: restore API response formats + ai-ui-control ws + profile fields

- Restore {plugins: [...], total: N} for /plugins and /plugins/active-manifests
  (flat array broke frontend PluginRegistry → no menu items → empty UI)
- Restore {count: N} for /notifications/unread-count
  (scalar broke frontend notification badge)
- Fix ai_ui_control: on_install → on_activate for WS manager registration
  (WS 403 on every reconnect after container restart)
- Fix double /api/v1 prefix in useAIContext.ts and SuggestionBadge.tsx
- Add first_name, last_name, avatar_url to User model + migration 0032
- Extend UserUpdate schema with profile + password change fields
- Extend user_service.update_user with profile fields + password change
- Extend frontend UserResponse/UserUpdate types

app/schemas/user.py

@@ -16,15 +16,24 @@ class UserCreate(BaseModel):
 
 class UserUpdate(BaseModel):
     name: str | None = Field(None, min_length=1, max_length=200)
+    first_name: str | None = Field(None, max_length=100)
+    last_name: str | None = Field(None, max_length=100)
+    email: EmailStr | None = None
+    avatar_url: str | None = None
     role: str | None = None
     role_id: str | None = Field(default=None, description="UUID of a custom Role; send null to clear")
     is_active: bool | None = None
+    current_password: str | None = Field(None, description="Required when changing password")
+    new_password: str | None = Field(None, min_length=8, description="New password")
 
 
 class UserResponse(BaseModel):
     id: str
     email: str
     name: str
+    first_name: str | None = None
+    last_name: str | None = None
+    avatar_url: str | None = None
     role: str
     role_id: str | None = None
     is_active: bool