Harden dashboard realtime state and controls

tests/dashboard/shell-status.test.ts

@@ -0,0 +1,22 @@
+import { describe, expect, it } from 'vitest';
+import { deriveShellStatus } from '../../apps/dashboard/src/app/shell-status.js';
+
+describe('global shell status', () => {
+  it('derives safety-critical labels from authoritative snapshots', () => {
+    expect(deriveShellStatus({
+      stats: { isRunning: true, dryRunMode: true, invitationCooldown: { reason: 'Reddit cooldown' } },
+      reddit: { ready: true, loggedIn: true, status: 'authenticated' },
+      realtime: { status: 'reconnecting', isStale: true },
+      sync: { syncing: true, syncingKind: 'full' },
+    })).toEqual({
+      bot: 'Running (dry run)', reddit: 'Reddit authenticated', realtime: 'Realtime reconnecting (stale)',
+      cooldown: 'Reddit cooldown', sync: 'Full sync active', controlAction: 'stop', controlDisabled: false,
+    });
+  });
+
+  it('guards bot controls until the authoritative bot state is available', () => {
+    expect(deriveShellStatus({ realtime: { status: 'idle', isStale: true } })).toMatchObject({
+      bot: 'Bot state unavailable', controlDisabled: true,
+    });
+  });
+});