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.

tests/unit/test_hierarchy_fidelity.py

@@ -77,7 +77,10 @@ def test_minimal_list_shows_hint_for_empty_inputs_and_errors():
     )
     text, items, labels = format_minimal_list_with_elements(elements[1:], 1000, 1000)
     lines = text.splitlines()
-    assert lines[0] == "[1] Hint: 'Search settings' | Bounds: [0,0][100,100]"
+    assert (
+        lines[0]
+        == "[1] Hint: 'Search settings' | Bounds: [0,0][100,100] | Editable: true | Value: empty"
+    )
     assert lines[1] == "[2] Text: 'abc' | Bounds: [0,200][100,300] | Error: 'Password too short'"
     assert len(lines) == 2 and labels == ["1", "2"]
     assert items[0]["is_hint"] is True and items[0]["text"] == "Search settings"