feat(frontend): Add comprehensive bank account management system.

- Add drawer-based bank account connection flow with country/bank selection
- Create bank connection success page with redirect handling
- Add bank connections status card showing all requisitions and their states
- Move account management actions to appropriate sections (add to connections, edit in accounts)
- Implement proper delete functionality for bank connections via GoCardless API
- Add proper TypeScript types for all bank-related data structures
- Improve error handling for bank connection operations with specific HTTP status codes
- Remove transaction data when disconnecting accounts while preserving history

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

frontend/src/components/AccountSettings.tsx

@@ -202,8 +202,12 @@ export default function AccountSettings() {
                               alt={`${account.institution_id} logo`}
                               className="w-full h-full object-contain"
                               onError={() => {
-                                console.warn(`Failed to load bank logo for ${account.institution_id}: ${account.logo}`);
-                                setFailedImages(prev => new Set([...prev, account.id]));
+                                console.warn(
+                                  `Failed to load bank logo for ${account.institution_id}: ${account.logo}`,
+                                );
+                                setFailedImages(
+                                  (prev) => new Set([...prev, account.id]),
+                                );
                               }}
                             />
                           ) : (