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.

apps/admin_console/services/task_import.py

@@ -51,7 +51,9 @@ class TaskOptions(BaseModel):
     action_failure_attempts: int | None = Field(default=None, ge=1, le=10)
     worker_cleanup_timeout_seconds: float | None = Field(default=None, gt=0, le=300)
     plugins: list[PluginSelection] | None = None
-    execution_target: ExecutionTarget | None = None
+    execution_target: ExecutionTarget | None = Field(
+        default=None, description="android (default), computer (PC only, no Android), or mixed"
+    )
 
     @field_serializer("recording", when_used="unless-none")
     def serialize_recording(self, value: RecordingConfig) -> dict:
@@ -117,6 +119,17 @@ def template() -> bytes:
             ),
         ]
     )
+    help_sheet.append(
+        [
+            "示例-PC-001",
+            "电脑桌面",
+            "浏览器检查",
+            "仅 PC 测试",
+            "已启用并授权提供画面观察的电脑插件，无需手机或模拟器在线",
+            "打开电脑浏览器，访问指定网页并核对实际结果。",
+            json.dumps({"profile": "flash", "execution_target": "computer"}, ensure_ascii=False),
+        ]
+    )
     for column in range(1, 8):
         help_sheet.column_dimensions[get_column_letter(column)].width = 70 if column > 5 else 26
     for row in help_sheet: