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https://gitee.com/wanwujie/sub2api
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Backend: - Detect and classify 403 responses into three types: validation (account needs Google verification), violation (terms of service / banned), forbidden (generic 403) - Extract verification/appeal URLs from 403 response body (structured JSON parsing with regex fallback) - Add needs_verify, is_banned, needs_reauth, error_code fields to UsageInfo (omitempty for zero impact on other platforms) - Handle 403 in request path: classify and permanently set account error - Save validation_url in error_message for degraded path recovery - Enrich usage with account error on both success and degraded paths - Add singleflight dedup for usage requests with independent context - Differentiate cache TTL: success/403 → 3min, errors → 1min - Return degraded UsageInfo instead of HTTP 500 on quota fetch errors Frontend: - Display forbidden status badges with color coding (red for banned, amber for needs verification, gray for generic) - Show clickable verification/appeal URL links - Display needs_reauth and degraded error states in usage cell - Add Antigravity tier label badge next to platform type Tests: - Comprehensive unit tests for classifyForbiddenType (7 cases) - Unit tests for extractValidationURL (8 cases including unicode escapes) - Integration test for FetchQuota forbidden path