feat: prepare 2.2.0 with UI and execution fixes

Add dark theme, richer Markdown and readable plugin results.
Improve Android input evidence, response integrity and diagnostics.
Unify lifecycle, guidance receipts and evidence sources across clients.
Keep direct action dispatch without an added AI quota approval layer.
Align version metadata at 2.2.0 and bundle Helper 1.2.2.

Validation: 3063 backend tests before the version bump; 44 after.
Frontend: 317 tests and production build passed.

apps/admin_console/schemas/task_schema.py

@@ -12,11 +12,13 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from pydantic import BaseModel
+from pydantic import BaseModel, ConfigDict
 from apps.admin_console.services.task_import import TaskOptions
 
 
 class RunRequest(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
     goal: str | None = None
     goals: list[str] | None = None
     profile: str | None = "flash"