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

scripts/rea/probe-open-target-conversation-20261017.json

@@ -1,15 +0,0 @@
-{
-  "include_fonts": false,
-  "include_message_content": true,
-  "track_selectors": [
-    ".cr-self-bubble",
-    ".cr-frame--right",
-    ".cr-toolbar"
-  ],
-  "actions": [
-    { "kind": "click", "step_id": "open-first-space-task", "selector": ".conversation-item", "index": 0, "frames": 0 },
-    { "kind": "wait", "step_id": "conversation-loaded", "duration_ms": 1500, "frames": 1 },
-    { "kind": "hover", "step_id": "hover-user-message", "selector": ".cr-self-bubble", "index": 0, "frames": 1 },
-    { "kind": "wait", "step_id": "toolbar-visible", "duration_ms": 400, "frames": 1 }
-  ]
-}