Add mission persistence: missions table, API routes, and history UI

- MariaDB missions table with scenes JSON
- /api/missions CRUD routes
- MissionTab saves completed missions to DB
- Mission history panel in UI

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

database/server.js

@@ -11,6 +11,7 @@ const rulesRoutes = require('./routes/rulesRoutes');
 const bestiaryRoutes = require('./routes/bestiaryRoutes');
 const weaponsRoutes = require('./routes/weaponsRoutes');
 const rulesStagingRoutes = require('./routes/rulesStagingRoutes');
+const missionRoutes = require('./routes/missionRoutes');
 // const rulesRoutes = require('./routes/rulesRoutes-simple');
 
 const gmkitDir = path.join(__dirname, '..', 'data', 'gamemasters_kit');
@@ -92,7 +93,17 @@ try {
     console.log('Rules staging routes registered');
   } catch (e) {
     console.error('Error mounting /api/rules/staging:', e && e.stack ? e.stack : e);
-  }  // Expose gamemaster kit files and a simple listing API for GM-only resources
+  }
+
+  try {
+    console.log('Registering /api/missions');
+    app.use('/api/missions', missionRoutes);
+    console.log('Mission routes registered');
+  } catch (e) {
+    console.error('Error mounting /api/missions:', e && e.stack ? e.stack : e);
+  }
+
+  // Expose gamemaster kit files and a simple listing API for GM-only resources
   try {
     console.log('Registering /api/gmkit and /gmkit static');
     app.get('/api/gmkit/list', (req, res) => {