diff --git a/config/quality/quality-baseline.json b/config/quality/quality-baseline.json
index 26f543c0e7..a197c32be8 100644
--- a/config/quality/quality-baseline.json
+++ b/config/quality/quality-baseline.json
@@ -92,9 +92,10 @@
       "_rebaseline_2026_07_13_v3847_release": "39.3 -> 38.0 (-1.3, beyond the 0.5 eps). v3.8.47 cycle drift: the cycle merged ~45 PRs adding API routes (relay repair/free-pool #6909, backpressure #6590, combo context requirements #6907, services/usage endpoints) faster than openapi.yaml documentation; same class as the v3.8.34/v3.8.39 rebaselines. Documented follow-up: raise coverage next cycle via docs/openapi.yaml additions."
     },
     "i18nUiCoverage.pct": {
-      "value": 99,
+      "value": 100,
       "direction": "up",
       "eps": 0.5,
+      "_tighten_2026_08_08_modality_bridge": "99 -> 100. Tighten required by the PR quality gate after the Modality Bridge UI keys were translated across all 42 non-English locales. CI collect-metrics on PR #9782 measured i18nUiCoverage.pct=100 with 0 ESLint warnings and 0 ESLint errors; locale dry-sync and UI coverage also report 100% with no missing keys or placeholders.",
       "_rebaseline_2026_07_04_v3844_release": "77.5 -> 76.8 (-0.7, beyond the 0.5 eps). v3.8.44 cycle drift surfaced only on the release PR (i18n-ui-coverage does NOT run on PR->release fast-gates). The cycle added ~1352 new UI keys to the en.json denominator (Discovery dashboard tab #5939, Bifrost/Mux embedded-service tabs #5817/#6034, proxy batch-ops #5918, fusion defaults #5598, tool-source toggle #5978, quota-row collapse #5977, CodeWhale/Crush CLI cards #5996/#5970, etc.) that the async i18n translation workflow has not yet back-filled (worst locales measure 76.8; __MISSING__ placeholders count as uncovered by design). Same shape and remedy as _rebaseline_2026_06_28_v3839_release. Recover via the i18n workflow next cycle; tighten with --require-tighten once translations land.",
       "_rebaseline_2026_06_28_v3839_release": "78.4 -> 77.5 (-0.9, beyond the 0.5 eps). v3.8.39 cycle drift surfaced ONLY on the release PR (i18n-ui-coverage does NOT run on PR->release fast-gates). The cycle added new UI strings (compression studio TOON A/B table, antigravity remote-login dashboard field, amber warning icon) to the en denominator faster than the 37 non-en locales were translated; those locales need `npm run i18n:run` with OMNIROUTE_TRANSLATION_API_KEY (unavailable locally) — same precedent as _rebaseline_2026_06_18_v3828_cycle_close + _quality_rebaseline_2026_06_20_ci_ratchet. Measured by CI collect-metrics (run 28317145160) = 77.5. My release-finalize tree changes no src/i18n/messages/*.json. Tightening is tracked as follow-up (run i18n:run with creds).",
       "_rebaseline_2026_07_13_v3847_release": "76.8 -> 75.5 (-1.3, beyond the 0.5 eps). v3.8.47 cycle drift: merged UI features added EN strings (relay repair UI #6909, combo builder #6907/#6991, capability override UI #6727) ahead of the 42-locale mirrors; same class as the v3.8.39/v3.8.44 rebaselines.",
diff --git a/src/i18n/messages/zh-TW.json b/src/i18n/messages/zh-TW.json
index bf41f2803a..0b498a3001 100644
--- a/src/i18n/messages/zh-TW.json
+++ b/src/i18n/messages/zh-TW.json
@@ -7168,7 +7168,7 @@
     "modalityBridgeTimeoutMs": "超時 (毫秒)",
     "modalityBridgeMaxImages": "每個請求的最大圖片數量",
     "modalityBridgeCacheEnabled": "快取描述",
-    "modalityBridgeCacheEnabledDesc": "重用相同圖像的描述（SHA-256 鍵控，內存中）。",
+    "modalityBridgeCacheEnabledDesc": "重用相同圖像的描述（SHA-256 鍵控，記憶體中）。",
     "modalityBridgeCacheTtlMinutes": "快取 TTL（分鐘）",
     "modalityBridgeCacheMaxEntries": "快取最大條目數",
     "modalityBridgeStatsBridged": "橋接的",