refactor: add name and color columns to mining_areas table and handle migration

server/database.js

@@ -85,12 +85,28 @@ export function initializeDatabase() {
       max_x INTEGER NOT NULL,
       max_y INTEGER NOT NULL,
       max_z INTEGER NOT NULL,
+      name TEXT,
+      color TEXT DEFAULT '#4a8c2a',
       status TEXT DEFAULT 'active',
       created_at INTEGER NOT NULL,
       updated_at INTEGER NOT NULL
     )
   `);
 
+  // Migrate existing mining_areas table to add name/color columns if missing
+  try {
+    const tableInfo = db.prepare("PRAGMA table_info(mining_areas)").all();
+    const columns = tableInfo.map(c => c.name);
+    if (!columns.includes('name')) {
+      db.exec('ALTER TABLE mining_areas ADD COLUMN name TEXT');
+    }
+    if (!columns.includes('color')) {
+      db.exec("ALTER TABLE mining_areas ADD COLUMN color TEXT DEFAULT '#4a8c2a'");
+    }
+  } catch (e) {
+    // Ignore migration errors
+  }
+
   // Mining statistics table
   db.exec(`
     CREATE TABLE IF NOT EXISTS mining_stats (