Implement configuration-based mod management and fix navigation spacing

## Major Features Added

### Configuration-Based Mod Management
- Implement proper Luanti mod system using load_mod_* entries in world.mt
- Add mod enable/disable via configuration instead of file copying
- Support both global mods (config-enabled) and world mods (physically installed)
- Clear UI distinction with badges: "Global (Enabled)", "World Copy", "Missing"
- Automatic registry verification to sync database with filesystem state

### Game ID Alias System
- Fix minetest_game/minetest technical debt with proper alias mapping
- Map minetest_game → minetest for world.mt files (matches Luanti internal behavior)
- Reference: c9d4c33174/src/content/subgames.cpp (L21)

### Navigation Improvements
- Fix navigation menu spacing and text overflow issues
- Change "Configuration" to "Config" for better fit
- Implement responsive font sizing with clamp() for better scaling
- Even distribution of nav buttons across full width

### Package Registry Enhancements
- Add verifyAndCleanRegistry() to automatically remove stale package entries
- Periodic verification (every 5 minutes) to keep registry in sync with filesystem
- Fix "already installed" errors for manually deleted packages
- Integration across dashboard, ContentDB, and installation workflows

## Technical Improvements

### Mod System Architecture
- Enhanced ConfigParser to handle load_mod_* entries in world.mt files
- Support for both configuration-based and file-based mod installations
- Proper mod type detection and management workflows
- Updated world details to show comprehensive mod information

### UI/UX Enhancements
- Responsive navigation with proper text scaling
- Improved mod management interface with clear action buttons
- Better visual hierarchy and status indicators
- Enhanced error handling and user feedback

### Code Quality
- Clean up gitignore to properly exclude runtime files
- Add package-lock.json for consistent dependency management
- Remove excess runtime database and log files
- Add .claude/ directory to gitignore

🤖 Generated with [Claude Code](https://claude.ai/code)

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

routes/worlds.js

@@ -33,11 +33,17 @@ router.get('/', async (req, res) => {
           let playerCount = 0;
           try {
             const playersDbPath = path.join(worldPath, 'players.sqlite');
-            const db = new sqlite3.Database(playersDbPath);
-            const all = promisify(db.all.bind(db));
-            const result = await all('SELECT COUNT(*) as count FROM players');
-            playerCount = result[0]?.count || 0;
-            db.close();
+            // Only try to read if the database file already exists and has content
+            if (fs.existsSync(playersDbPath)) {
+              const stats = fs.statSync(playersDbPath);
+              if (stats.size > 0) {
+                const db = new sqlite3.Database(playersDbPath, sqlite3.OPEN_READONLY);
+                const all = promisify(db.all.bind(db));
+                const result = await all('SELECT COUNT(*) as count FROM players');
+                playerCount = result[0]?.count || 0;
+                db.close();
+              }
+            }
           } catch (dbError) {}
           
           const gameid = config.gameid || 'minetest_game';
@@ -131,18 +137,29 @@ router.post('/create', async (req, res) => {
       });
     } catch {}
     
-    console.log('Starting world creation for:', name, 'with gameid:', gameid);
+    console.log('Creating world:', name, 'with gameid:', gameid);
     
-    // Start world creation asynchronously and respond immediately
-    serverManager.createWorld(name, gameid || 'minetest_game')
+    // Get the default game if none specified
+    let finalGameId = gameid;
+    if (!finalGameId) {
+      try {
+        const games = await paths.getInstalledGames();
+        finalGameId = games.length > 0 ? games[0].name : 'minetest_game';
+      } catch (error) {
+        finalGameId = 'minetest_game';
+      }
+    }
+    
+    // Start world creation and redirect immediately with creating status
+    serverManager.createWorld(name, finalGameId)
       .then(() => {
-        console.log('Successfully created world using Luanti:', name);
+        console.log('Successfully created world:', name);
         // Notify clients via WebSocket
         const io = req.app.get('socketio');
         if (io) {
           io.emit('worldCreated', { 
             worldName: name, 
-            gameId: gameid || 'minetest_game',
+            gameId: finalGameId,
             success: true 
           });
         }
@@ -154,7 +171,7 @@ router.post('/create', async (req, res) => {
         if (io) {
           io.emit('worldCreated', { 
             worldName: name, 
-            gameId: gameid || 'minetest_game',
+            gameId: finalGameId,
             success: false,
             error: error.message 
           });
@@ -207,6 +224,40 @@ router.get('/:worldName', async (req, res) => {
     } catch {}
     
     let enabledMods = [];
+    
+    // Get configuration-enabled mods (from global mods directory)
+    if (config.enabled_mods) {
+      for (const [modName, enabled] of Object.entries(config.enabled_mods)) {
+        if (enabled) {
+          try {
+            const globalModPath = paths.getModPath(modName);
+            const globalModConfigPath = paths.getModConfigPath(modName);
+            await fs.access(globalModPath);
+            const modConfig = await ConfigParser.parseModConfig(globalModConfigPath);
+            enabledMods.push({
+              name: modName,
+              title: modConfig.title || modName,
+              description: modConfig.description || '',
+              author: modConfig.author || '',
+              location: 'global-enabled',
+              path: globalModPath
+            });
+          } catch {
+            // Global mod not found, but still enabled in config - show as missing
+            enabledMods.push({
+              name: modName,
+              title: modName,
+              description: 'Missing global mod',
+              author: '',
+              location: 'global-missing',
+              path: null
+            });
+          }
+        }
+      }
+    }
+    
+    // Get physically installed world mods
     try {
       const worldModsPath = paths.getWorldModsPath(worldName);
       const modDirs = await fs.readdir(worldModsPath);
@@ -219,7 +270,8 @@ router.get('/:worldName', async (req, res) => {
             title: modConfig.title || modDir,
             description: modConfig.description || '',
             author: modConfig.author || '',
-            location: 'world'
+            location: 'world-installed',
+            path: path.join(worldModsPath, modDir)
           });
         } catch {}
       }