Merge branch 'release/custom-0.1.100' of github.com:touwaeriol/sub2api into release/custom-0.1.100

# Conflicts:
#	backend/internal/pkg/antigravity/client.go
#	backend/internal/service/antigravity_credits_overages.go
#	backend/internal/service/antigravity_credits_overages_test.go
#	frontend/src/components/account/__tests__/AccountStatusIndicator.spec.ts

backend/cmd/server/VERSION

@@ -1 +1 @@
-0.1.100.2
+0.1.100.4

frontend/src/types/index.ts

@@ -668,6 +668,7 @@ export interface Account {
   // Extra fields including Codex usage and model-level rate limits (Antigravity smart retry)
   extra?: (CodexUsageSnapshot & {
     model_rate_limits?: Record<string, { rate_limited_at: string; rate_limit_reset_at: string }>
+    antigravity_credits_overages?: Record<string, { activated_at: string; active_until: string }>
   } & Record<string, unknown>)
   proxy_id: number | null
   concurrency: number