Merge pull request #3316 from ahuangsnail/fix/max-output-tokens-zero-fallback

fix: treat zero limit.output as unknown to enable fallback to bundled…

src/shared/model-capabilities/runtime-model-readers.ts

@@ -197,5 +197,7 @@ export function readRuntimeModelLimitOutput(
 		return undefined
 	}
 
-	return readNumber(limit.output)
+	const output = readNumber(limit.output)
+	// Treat 0 or negative as unknown so ?? fallback to bundled snapshot works
+	return output && output > 0 ? output : undefined
 }