fix: send tools:false to the router so skill fast-paths cannot hijack reviews

The router's current-info briefing fast-path (enableToolsEffective gate)
was intercepting review prompts whose diffs mention GitHub-like terms and
returning a trending-repos digest instead of the model's review. Reviews
need pure model reasoning; body.tools=false disables the tool layer.

Co-Authored-By: Claude Fable 5 <[email protected]>

src/lib/router.js

@@ -6,7 +6,10 @@ export async function chat({ routerUrl, model, messages, agentId, sessionId, ten
   const res = await fetch(`${routerUrl.replace(/\/$/, '')}/v1/chat`, {
     method: 'POST',
     headers: { 'Content-Type': 'application/json' },
-    body: JSON.stringify({ model, messages, agentId, sessionId, tenantId, stream: false }),
+    // tools:false — reviews need pure model reasoning; it also keeps the
+    // router's tool/skill fast-paths (e.g. current-info briefing) from
+    // hijacking prompts whose diffs mention GitHub/news-like terms.
+    body: JSON.stringify({ model, messages, agentId, sessionId, tenantId, stream: false, tools: false }),
     signal: AbortSignal.timeout(timeoutMs)
   });
   if (!res.ok) {