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

scripts/rea/probe-todo13-open-appearance.json

@@ -1,14 +0,0 @@
-{
-  "include_fonts": false,
-  "include_message_content": false,
-  "track_selectors": [
-    ".settings-modal__panel",
-    ".settings-navigation__item",
-    ".appearance-card--light",
-    ".appearance-card--dark"
-  ],
-  "actions": [
-    { "kind": "click", "step_id": "open-appearance-by-observed-nav-index-3", "selector": ".settings-navigation__item", "index": 3, "frames": 0 },
-    { "kind": "wait", "step_id": "appearance-page-confirmed-before-dark-theme", "duration_ms": 450, "frames": 1 }
-  ]
-}