docs: align config reference with implementation

src/config/schema/oh-my-opencode-config.ts

@@ -60,7 +60,7 @@ export const OhMyOpenCodeConfigSchema = z.object({
   /**
    * Enable runtime fallback (default: false)
    * Set to false to disable, or use object for advanced config:
-   * { "enabled": true, "retry_on_errors": [400, 429], "timeout_seconds": 30 }
+   * { "enabled": true, "retry_on_errors": [429, 500, 502, 503, 504], "timeout_seconds": 30 }
    */
   runtime_fallback: z.union([z.boolean(), RuntimeFallbackConfigSchema]).optional(),
   background_task: BackgroundTaskConfigSchema.optional(),

src/config/schema/runtime-fallback.ts

@@ -3,13 +3,13 @@ import { z } from "zod"
 export const RuntimeFallbackConfigSchema = z.object({
   /** Enable runtime fallback (default: false) */
   enabled: z.boolean().optional(),
-  /** HTTP status codes that trigger fallback (default: [400, 429, 503, 529]) */
+  /** HTTP status codes that trigger fallback (default: [429, 500, 502, 503, 504]) */
   retry_on_errors: z.array(z.number()).optional(),
   /** Maximum fallback attempts per session (default: 3) */
   max_fallback_attempts: z.number().min(1).max(20).optional(),
   /** Cooldown in seconds before retrying a failed model (default: 60) */
   cooldown_seconds: z.number().min(0).optional(),
-  /** Session-level timeout in seconds to advance fallback when provider hangs (default: 30). Set to 0 to disable auto-retry signal detection (only error-based fallback remains active). */
+  /** Session-level timeout in seconds to advance fallback when provider hangs (default: 30). Set to 0 to disable timeout escalation and message.updated auto-retry signal detection. */
   timeout_seconds: z.number().min(0).optional(),
   /** Show toast notification when switching to fallback model (default: true) */
   notify_on_fallback: z.boolean().optional(),