fix(sqlite): resolve duplicate table creation in migrations

Split initial schema into two sequential migrations to prevent duplicate
table creation and improve migration clarity.

Changes:
- Separate initial schema into two distinct migrations:
  * 001_initial_accounts (v1): Create accounts table & index
  * 002_secret_and_settings (v2): Create remaining tables (secret, settings, contacts, logs, temp)
- Add version conflict detection to prevent duplicate migration versions
- Ensure migrations are sequential (no gaps)
- Update rollback scripts to only drop relevant tables

Technical Details:
- Add validateMigrationVersions() to check for:
  * Duplicate version numbers
  * Sequential version ordering
  * Gaps in version numbers
- Validate migrations both at definition time and runtime
- Update schema_version tracking to reflect new versioning

Testing:
- Verified no duplicate table creation
- Confirmed migrations run in correct order
- Validated rollback procedures
- Checked version conflict detection

electron/src/rt/sqlite-migrations.ts

@@ -323,6 +323,31 @@ const parseSQL = (sql: string): ParsedSQL => {
   return result;
 };
 
+// Add version conflict detection
+const validateMigrationVersions = (migrations: Migration[]): void => {
+  const versions = new Set<number>();
+  const duplicates = new Set<number>();
+  
+  migrations.forEach(migration => {
+    if (versions.has(migration.version)) {
+      duplicates.add(migration.version);
+    }
+    versions.add(migration.version);
+  });
+
+  if (duplicates.size > 0) {
+    throw new Error(`Duplicate migration versions found: ${Array.from(duplicates).join(', ')}`);
+  }
+
+  // Verify versions are sequential
+  const sortedVersions = Array.from(versions).sort((a, b) => a - b);
+  for (let i = 0; i < sortedVersions.length; i++) {
+    if (sortedVersions[i] !== i + 1) {
+      throw new Error(`Migration versions must be sequential. Found gap at version ${i + 1}`);
+    }
+  }
+};
+
 // Initial migration for accounts table
 const INITIAL_MIGRATION: Migration = {
   version: 1,
@@ -357,24 +382,10 @@ const INITIAL_MIGRATION: Migration = {
 const MIGRATIONS: Migration[] = [
   INITIAL_MIGRATION,
   {
-    version: 1,
-    name: 'initial_schema',
-    description: 'Initial database schema with accounts, secret, settings, contacts, logs, and temp tables',
+    version: 2,
+    name: '002_secret_and_settings',
+    description: 'Add secret, settings, contacts, logs, and temp tables',
     sql: `
-      -- Accounts table for user identities
-      CREATE TABLE IF NOT EXISTS accounts (
-        id INTEGER PRIMARY KEY AUTOINCREMENT,
-        dateCreated TEXT NOT NULL,
-        derivationPath TEXT,
-        did TEXT NOT NULL,
-        identityEncrBase64 TEXT, -- encrypted & base64-encoded
-        mnemonicEncrBase64 TEXT, -- encrypted & base64-encoded
-        passkeyCredIdHex TEXT,
-        publicKeyHex TEXT NOT NULL
-      );
-
-      CREATE INDEX IF NOT EXISTS idx_accounts_did ON accounts(did);
-
       -- Secret table for storing encryption keys
       -- Note: This is a temporary solution until better secure storage is implemented
       CREATE TABLE IF NOT EXISTS secret (
@@ -447,7 +458,6 @@ const MIGRATIONS: Migration[] = [
       );
     `,
     rollback: `
-      DROP TABLE IF EXISTS accounts;
       DROP TABLE IF EXISTS secret;
       DROP TABLE IF EXISTS settings;
       DROP TABLE IF EXISTS contacts;
@@ -457,6 +467,9 @@ const MIGRATIONS: Migration[] = [
   }
 ];
 
+// Validate migrations before export
+validateMigrationVersions(MIGRATIONS);
+
 // Helper functions
 const verifyPluginState = async (plugin: any): Promise<boolean> => {
   try {
@@ -1004,6 +1017,9 @@ export async function runMigrations(
 ): Promise<MigrationResult[]> {
   logger.info('Starting migration process');
   
+  // Validate migrations before running
+  validateMigrationVersions(MIGRATIONS);
+  
   // Verify plugin is available
   if (!await verifyPluginState(plugin)) {
     throw new Error('SQLite plugin not available');