feat: frontend clear-error button, debug trace viewer, debug_logging toggle, docs updates

Agent-Logs-Url: https://github.com/christianlouis/InboxConverge/sessions/5d2918de-630e-4a66-8355-1b036c620b1c

Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>

frontend/src/lib/api.ts

@@ -66,6 +66,7 @@ export interface MailAccount {
   check_interval_minutes: number;
   max_emails_per_check: number;
   delete_after_forward: boolean;
+  debug_logging: boolean;
   status: string;
   provider_name?: string | null;
   auto_detected: boolean;
@@ -95,6 +96,7 @@ export interface MailAccountCreate {
   check_interval_minutes?: number;
   max_emails_per_check?: number;
   delete_after_forward?: boolean;
+  debug_logging?: boolean;
   provider_name?: string | null;
 }
 
@@ -114,6 +116,7 @@ export interface MailAccountUpdate {
   check_interval_minutes?: number;
   max_emails_per_check?: number;
   delete_after_forward?: boolean;
+  debug_logging?: boolean;
   provider_name?: string | null;
 }
 
@@ -361,6 +364,11 @@ export const mailAccountsApi = {
     }>("/mail-accounts/auto-detect", { email_address: emailAddress });
     return response.data;
   },
+
+  async clearError(id: number): Promise<MailAccount> {
+    const response = await api.post<MailAccount>(`/mail-accounts/${id}/clear-error`);
+    return response.data;
+  },
 };
 
 // ── Processing Runs API ─────────────────────────────────────────────────