feat: Add database migration tools and fix Electron integration

- Add comprehensive IndexedDB to SQLite migration service (1,397 lines)
- Create migration UI with progress tracking and validation (1,492 lines)
- Fix Electron TypeScript compilation and SQLite plugin issues
- Expand migration system with detailed documentation and error handling
- Add development guide and coding standards

Resolves: #electron-startup #database-migration #typescript-errors
Impact: Enables user-friendly database migration with full data verification

src/services/migrationService.ts

@@ -113,7 +113,7 @@ class MigrationRegistry {
    * Adds a migration to the list of migrations that will be applied when
    * runMigrations() is called. Migrations should be registered in order
    * of their intended execution.
-   * 
+   *
    * @param migration - The migration to register
    * @throws {Error} If migration name is empty or already exists
    * 
@@ -139,7 +139,7 @@ class MigrationRegistry {
 
   /**
    * Get all registered migrations
-   * 
+   *
    * Returns a copy of all migrations that have been registered with this
    * registry. The migrations are returned in the order they were registered.
    * 
@@ -176,11 +176,11 @@ const migrationRegistry = new MigrationRegistry();
 
 /**
  * Register a migration with the migration service
- * 
+ *
  * This is the primary public API for registering database migrations.
  * Each migration should represent a single, focused schema change that
  * can be applied atomically.
- * 
+ *
  * @param migration - The migration to register
  * @throws {Error} If migration is invalid
  * 
@@ -339,7 +339,7 @@ async function isSchemaAlreadyPresent<T>(
 
 /**
  * Run all registered migrations against the database
- * 
+ *
  * This is the main function that executes the migration process. It:
  * 1. Creates the migrations tracking table if needed
  * 2. Determines which migrations have already been applied
@@ -350,7 +350,7 @@ async function isSchemaAlreadyPresent<T>(
  * 
  * The function is designed to be idempotent - it can be run multiple times
  * safely without re-applying migrations that have already been completed.
- * 
+ *
  * @template T - The type returned by SQL query operations
  * @param sqlExec - Function to execute SQL statements (INSERT, UPDATE, CREATE, etc.)
  * @param sqlQuery - Function to execute SQL queries (SELECT)
@@ -532,14 +532,14 @@ export async function runMigrations<T>(
         } else {
           // For other types of errors, still fail the migration
           console.error(`❌ [Migration] Failed to apply ${migration.name}:`, error);
-          logger.error(
-            `[MigrationService] Failed to apply migration ${migration.name}:`,
-            error,
-          );
-          throw new Error(`Migration ${migration.name} failed: ${error}`);
-        }
+        logger.error(
+          `[MigrationService] Failed to apply migration ${migration.name}:`,
+          error,
+        );
+        throw new Error(`Migration ${migration.name} failed: ${error}`);
       }
     }
+    }
 
     // Step 5: Final validation - verify all migrations are properly recorded
     console.log("\n🔍 [Migration] Final validation - checking migrations table...");