feat: add role-based address limit configuration (#741)

- Add RoleAddressConfig component in admin panel
- Implement role_address_config API endpoints (GET/POST)
- Add getMaxAddressCount function with validation chain
- Priority: role config > global settings
- Support editable table with clearable input
- Add extensible RoleConfig type for future fields
- Use context for current user, query DB for target user
- Optimize state management (remove redundant roleConfigsMap)

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

Co-authored-by: Claude <noreply@anthropic.com>

worker/src/models/index.ts

@@ -154,3 +154,10 @@ export type EmailRuleSettings = {
     blockReceiveUnknowAddressEmail: boolean;
     emailForwardingList: SubdomainForwardAddressList[]
 }
+
+export type RoleConfig = {
+    maxAddressCount?: number;
+    // future configs can be added here
+}
+
+export type RoleAddressConfig = Record<string, RoleConfig>;