fix: Resolve all config loading and migration issues

- Fix infinite recursion loop in corrupted config recovery
- Always initialize self.rotations attribute before loading
- Fix invalid default providers.json (remove extra condensation key)
- Fix users table order - create table before column migrations
- Remove invalid extra braces from default rotations.json
- Corrupted configs are now safely backed up with timestamps
- No more JSON decode errors on first run
- No more "no such table: users" warning on first run

aisbf/config.py

@@ -454,6 +454,7 @@ class Config:
 
     def _load_rotations(self):
         import logging
+        import time
         logger = logging.getLogger(__name__)
         logger.info(f"=== Config._load_rotations START ===")
         
@@ -472,6 +473,7 @@ class Config:
                 raise FileNotFoundError("Could not find rotations.json configuration file")
         
         logger.info(f"Loading rotations from: {rotations_path}")
+        self.rotations = {}
         try:
             with open(rotations_path) as f:
                 data = json.load(f)
@@ -524,7 +526,34 @@ class Config:
                             logger.info(f"  ✓ Provider '{provider_id}' is available")
         except json.JSONDecodeError as e:
             logger.error(f"Failed to parse rotations.json: {e}")
+            if rotations_path != Path.home() / '.aisbf' / 'rotations.json':
+                # Not user config, just raise
+                raise ValueError(f"Invalid JSON in rotations.json: {e}")
+            
+            # This is the user's config file - we need to recover
+            logger.warning("⚠️  Detected corrupted user config file!")
+            
+            # Backup corrupted file
+            backup_path = rotations_path.with_suffix(f".json.corrupted.{int(time.time())}")
+            shutil.copy2(rotations_path, backup_path)
+            logger.warning(f"📋  Corrupted config backed up to: {backup_path}")
+            
+            # Copy fresh default config
+            try:
+                source_dir = self._get_config_source_dir()
+                src = source_dir / 'rotations.json'
+                shutil.copy2(src, rotations_path)
+                logger.warning(f"✅  Replaced corrupted rotations.json with default valid file")
+                logger.warning("⚠️  Your previous settings were backed up - you can restore them from the backup file")
+                
+                # Load the fresh config now
+                # Don't call recursively - Uvicorn reloader will restart after file change
+                pass
+                
+            except Exception as backup_err:
+                logger.error(f"Failed to recover corrupted config: {backup_err}")
                 raise ValueError(f"Invalid JSON in rotations.json: {e}")
+                
         except Exception as e:
             logger.error(f"Failed to load rotations.json: {e}")
             raise

aisbf/database.py

@@ -4200,6 +4200,15 @@ def DatabaseManager__run_config_migrations(self, cursor, auto_increment, timesta
     except Exception as e:
         logger.warning(f"Migration check for default free tier: {e}")
 
+    # Migration: Ensure users table exists first
+    try:
+        if self.db_type == 'sqlite':
+            cursor.execute("CREATE TABLE IF NOT EXISTS users (id INTEGER PRIMARY KEY AUTOINCREMENT, email VARCHAR(255) UNIQUE NOT NULL, password_hash VARCHAR(255), created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP, updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP)")
+        else:
+            cursor.execute("CREATE TABLE IF NOT EXISTS users (id INT AUTO_INCREMENT PRIMARY KEY, email VARCHAR(255) UNIQUE NOT NULL, password_hash VARCHAR(255), created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP, updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP)")
+    except Exception as e:
+        logger.warning(f"Failed to create users table: {e}")
+
     # Migration: Add tier_id column to users table
     try:
         if self.db_type == 'sqlite':

config/providers.json

 {
-  "condensation": {
-    "provider_id": "gemini",
-    "model": "gemini-1.5-flash",
-    "enabled": true,
-    "max_context": 8000
-  },
   "providers": {
     "kilo": {
       "id": "kilo",