feat(admin-web): expose AI point balance and usage ledger

Surfaces the new AI point quota in the workspace shell and adds a
Personal Center → AI Point Usage page that shows balance, base-char
rule, and the paginated reservation/refund history. Updates shared
types for the QuotaSummary and ledger payloads.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

packages/shared-types/src/index.ts

@@ -48,6 +48,8 @@ export interface MembershipInfo {
   end_at: string | null;
   article_generation_limit: number;
   article_quota_cycle: string;
+  ai_points_monthly: number;
+  ai_point_base_chars: number;
   company_limit: number;
   image_storage_bytes: number;
   contact_admin_on_expiry: boolean;
@@ -353,6 +355,34 @@ export interface QuotaSummary {
   used_quota: number;
   balance: number;
   reset_at: string | null;
+  ai_points_total: number;
+  ai_points_used: number;
+  ai_points_balance: number;
+  ai_point_base_chars: number;
+  ai_points_reset_at: string | null;
+}
+
+export interface AIPointUsageLog {
+  id: number;
+  usage_type: string;
+  resource_type: string | null;
+  resource_id: number | null;
+  resource_uid: string | null;
+  request_chars: number;
+  base_chars: number;
+  points: number;
+  status: string;
+  model: string | null;
+  error_message: string | null;
+  completed_at: string | null;
+  created_at: string;
+}
+
+export interface AIPointUsageListResponse {
+  items: AIPointUsageLog[];
+  total: number;
+  page: number;
+  page_size: number;
 }
 
 export interface TemplateCard {