fix(alert): emit onStateChange when WATCHING turns off on command finish

lib/src/lib/alert-manager.test.ts

@@ -492,6 +492,29 @@ describe('AlertManager in isolation', () => {
     expect(manager.getState(id).watchingEnabled).toBe(false);
   });
 
+  it('notifies subscribers when WATCHING turns off as a watched command finishes', () => {
+    const id = 'rule-finish-notify';
+    manager.setWatchedCommands(['claude']);
+
+    manager.applyTerminalSemanticEvents(id, [
+      { type: 'commandLine', commandLine: 'claude' },
+      { type: 'commandStart', source: 'osc633_E', startedAt: Date.now() },
+    ]);
+    expect(manager.getState(id).watchingEnabled).toBe(true);
+
+    // Subscribe after the command has started so we only capture the finish.
+    const watching: boolean[] = [];
+    manager.onStateChange((_id, state) => {
+      if (_id === id) watching.push(state.watchingEnabled);
+    });
+
+    manager.applyTerminalSemanticEvents(id, [{ type: 'commandFinish', exitCode: 0 }]);
+
+    expect(manager.getState(id).watchingEnabled).toBe(false);
+    // The off-transition must reach subscribers, not just live getState reads.
+    expect(watching).toContain(false);
+  });
+
   it('matches on the bare program name, not the whole command line', () => {
     const id = 'rule-argv0';
     manager.setWatchedCommands(['claude']);

lib/src/lib/alert-manager.ts

@@ -397,14 +397,18 @@ export class AlertManager {
     const watch = entry.commandExitWatch;
     entry.commandExitWatch = null;
     entry.pendingCommandLine = null;
-    this.applyWatchingRule(id, entry);
+    // Disposing the WATCHING monitor flips `watchingEnabled`/status, so its
+    // change must propagate even when command-exit never armed — otherwise a
+    // watched command that finishes leaves subscribers on stale WATCHING state
+    // until the next command starts.
+    const watchingChanged = this.applyWatchingRule(id, entry);
 
     const wasArmed = entry.commandExitStatus === 'COMMAND_EXIT_ARMED';
     if (entry.commandExitStatus !== 'ALERT_RINGING') {
       entry.commandExitStatus = 'IDLE';
     }
 
-    if (!watch || !wasArmed) return wasArmed;
+    if (!watch || !wasArmed) return watchingChanged;
     if (this.hasAttention(id)) return true;
 
     if (Date.now() - watch.startedAt < this.inactivityTimeoutMs) return true;