fix: pick best fuzzy model match

CHANGELOG.md

@@ -10,6 +10,7 @@
 ### Fixes
 - Tools/Models: MiniMax vision now uses the Coding Plan VLM endpoint (`/v1/coding_plan/vlm`) so the `image` tool works with MiniMax keys (also accepts `@/path/to/file.png`-style inputs).
 - Gateway/macOS: reduce noisy loopback WS “closed before connect” logs during tests.
+- Auto-reply: resolve ambiguous `/model` fuzzy matches by picking the best candidate instead of erroring.
 
 ## 2026.1.12-1