chore: upgrade claude-sonnet-4-5 to claude-sonnet-4-6 across codebase

src/tools/delegate-task/constants.ts

@@ -125,7 +125,7 @@ This is NOT a default choice - it's for genuinely unclassifiable moderate-effort
 </Category_Context>
 
 <Caller_Warning>
-THIS CATEGORY USES A MID-TIER MODEL (claude-sonnet-4-5).
+THIS CATEGORY USES A MID-TIER MODEL (claude-sonnet-4-6).
 
 **PROVIDE CLEAR STRUCTURE:**
 1. MUST DO: Enumerate required actions explicitly
@@ -213,7 +213,7 @@ export const DEFAULT_CATEGORIES: Record<string, CategoryConfig> = {
   deep: { model: "openai/gpt-5.3-codex", variant: "medium" },
   artistry: { model: "google/gemini-3-pro", variant: "high" },
   quick: { model: "anthropic/claude-haiku-4-5" },
-  "unspecified-low": { model: "anthropic/claude-sonnet-4-5" },
+  "unspecified-low": { model: "anthropic/claude-sonnet-4-6" },
   "unspecified-high": { model: "anthropic/claude-opus-4-6", variant: "max" },
   writing: { model: "kimi-for-coding/k2p5" },
 }