chore(tests): prune obsolete probes and define truthful offline test gates

scripts/rea/probe-user-message-edit-cancel-20261017.json

@@ -1,13 +0,0 @@
-{
-  "include_fonts": false,
-  "include_message_content": false,
-  "track_selectors": [
-    ".cr-self-bubble",
-    ".cr-toolbar",
-    ".cr-user-message-editor"
-  ],
-  "actions": [
-    { "kind": "click", "step_id": "cancel-editor", "selector": ".cr-user-message-editor__cancel", "index": 0, "frames": 0 },
-    { "kind": "wait", "step_id": "editor-closed", "duration_ms": 500, "frames": 1 }
-  ]
-}