feat: release 2.2.0 with PC-only tests and execution reliability fixes

Unify task scheduling and queue state, fix Android input and observation recovery, preserve screenshot paths, and match final review criteria accurately. Add collapsible copyable results and publish the complete 2.1.0 upgrade notes. Validation: 3189 backend tests, 326 frontend tests, 24 client tests, production build and quality gates.

artemis/controllers/unified_controller.py

@@ -239,20 +239,10 @@ class UnifiedMobileController:
     async def erase_text(self, nb_chars: int | None = None) -> bool:
         if nb_chars is not None and nb_chars > 0:
             for _ in range(nb_chars):
-                await self._driver.press_key("delete")
+                if not await self._driver.press_key("delete"):
+                    return False
             return True
-        # Best-effort full clear: End -> Ctrl+A -> Delete
-        try:
-            clear_cmd = (
-                "input keyevent 123 && "
-                "input keycombination 113 29 && input keyevent 67 && "
-                "input keyevent 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67"
-            )
-            await self._driver.execute_shell(clear_cmd)
-        except Exception:
-            for _ in range(30):
-                await self._driver.press_key("delete")
-        return True
+        return await self._driver.input_text("", clear_existing=True)
 
     async def get_ui_elements(self) -> list[dict]:
         screen_data = await self._driver.get_screen_data()