Increase Claude max_tokens to 180K for larger diffs

- Increase max_tokens from 32K to 180K to allow for larger diff generation
- Note: Actual limit depends on context window (200K total for Sonnet 4.5)
- With ~150K input tokens, effective output limit is ~50K, but API will enforce actual limit

Author: htilly

.github/agent/agent.mjs

@@ -973,7 +973,7 @@ async function callAI(promptText) {
   if (provider === "claude") {
     const response = await aiClient.messages.create({
       model: aiModel,
-      max_tokens: 32768, // Increased to 32K for larger diffs
+      max_tokens: 180000, // Increased to 180K for very large diffs (note: actual limit depends on context window)
       temperature: 0.2,
       messages: [{ role: "user", content: promptText }],
     });