chore(release): wire normalize_session_keys + repair stale JS tests

Wire normalize_session_keys import and call into _run_poll_cycle step 13b, running
before the prune step. Use local device id from muxplex.identity.load_device_id().
Best-effort: errors are logged, poll cycle continues.

Fix 10 previously-failing JS tests:
- 8 were stale: regex search windows too narrow, refactored implementations, removed
  UI elements (settings dialog: 4→5 tabs; sessions panel: moved hidden_sessions to Views)
- 2 were DOM drift from feature additions
Each fix has a code comment explaining the change.

Add 3 new end-to-end tests in test_views.py verifying normalize→prune pipeline.

Final test counts: pytest 1266 passing (1263 + 3 new), node --test 396 passing.

muxplex/main.py

@@ -73,7 +73,7 @@ from muxplex.settings import (
     save_settings,
 )
 from muxplex.pruning import load_pruning_state, save_pruning_state
-from muxplex.views import prune_stale_keys
+from muxplex.views import normalize_session_keys, prune_stale_keys
 from muxplex.identity import load_device_id
 from muxplex.ttyd import kill_orphan_ttyd, kill_ttyd, spawn_ttyd, TTYD_PORT
 
@@ -272,6 +272,27 @@ async def _run_poll_cycle() -> None:
             except Exception:
                 _log.exception("settings sync cycle error")
 
+    # 13b. Normalize bare session-key entries to the canonical device_id:name form.
+    #
+    #      Phase 1 added normalize_session_keys() in views.py but it was never
+    #      wired into the runtime.  Running normalization here (before pruning)
+    #      ensures that legacy bare-name entries stored in hidden_sessions or
+    #      view.sessions are upgraded to canonical form so the prune step below
+    #      can compare them cleanly against the live_keys set.
+    try:
+        _norm_settings = load_settings()
+        _norm_device_id = load_device_id()
+        _sessions_for_normalize = [
+            {"name": _n, "sessionKey": f"{_norm_device_id}:{_n}"} for _n in names
+        ]
+        _norm_before = json.dumps(_norm_settings, sort_keys=True)
+        normalize_session_keys(_norm_settings, _sessions_for_normalize)
+        _norm_after = json.dumps(_norm_settings, sort_keys=True)
+        if _norm_before != _norm_after:
+            save_settings(_norm_settings)
+    except Exception:
+        _log.exception("session-key normalize cycle error")
+
     # 14. Prune stale session keys from views and hidden_sessions.
     #
     #     Each device only knows its own live sessions natively.  The live_keys