Restart keys flash when their thing is down; Ableton reopens its last set

- A Restart page key flashes red "HOLD TO FIX" while any check that its
  fix (or a fix/connection in its "watch") covers is down, e.g. DVS
  TRACKS when DANTE misses NA-Tracks.
- Ableton's start and restart reopen the set Live last opened (read from
  its Log.txt before quitting; templates skipped) instead of the default
  template. Tested live: ABLETON and TRANSLATE restart keys.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

status_panel.py

@@ -863,6 +863,23 @@ class Engine:
                     plan.append((ident, "restart", chk["conn"], chk))
         return plan
 
+    def failing_targets(self):
+        """(fix ids, Companion connections) of every check that is down right now: a Restart page
+        key whose fix (or a fix/connection in its "watch") is among them flashes."""
+        fixes, conns = set(), set()
+        for key, tr in self.trackers.items():
+            if not tr.confirmed or tr.result.level != ERR or key not in self.meta:
+                continue
+            _, chk, sub = self.meta[key]
+            fix_id = chk.get("fix")
+            if isinstance(fix_id, dict):
+                fix_id = fix_id.get(sub, fix_id.get("*"))
+            if fix_id:
+                fixes.add(fix_id)
+            if chk.get("conn"):
+                conns.add(chk["conn"])
+        return fixes, conns
+
     def failing(self, tile_id):
         """Is anything on this button (or its members) in a confirmed fault right now?"""
         for key in self.keys_for(tile_id):
@@ -1062,10 +1079,15 @@ def colored(text, level):
 
 def render(engine, service_on):
     out = {}
+    down_fixes, down_conns = engine.failing_targets()
     for kid, key in engine.restart_keys.items():
         note = engine.notes.get(kid)
+        watch = [key["fix"]] + key.get("watch", [])
+        down = any(w[5:] in down_conns if w.startswith("conn:") else w in down_fixes for w in watch)
         if note and engine.now < note["until"]:
             out[kid] = colored(key["label"] + "\n" + note["text"], note["level"])
+        elif down:                                    # flashes: this is the one to hold
+            out[kid] = colored(key["label"] + "\nHOLD TO FIX", "err")
         else:
             out[kid] = colored(key["label"] + "\nHOLD 2s", "idle")
     for tile in engine.cfg["tiles"]:
@@ -1697,6 +1719,9 @@ def load_config(path):
             raise ValueError("restart key %s has a tile's id" % k["id"])
         if k["fix"] not in cfg.get("fixes", {}):
             raise ValueError("restart key %s: unknown fix %s" % (k["id"], k["fix"]))
+        for w in k.get("watch", []):
+            if not w.startswith("conn:") and w not in cfg.get("fixes", {}):
+                raise ValueError("restart key %s: unknown fix %s in watch" % (k["id"], w))
     return cfg