fix: address Cubic round-2 P2 issues

- target-token-truncation: eliminate redundant SDK messages fetch by
  extracting tool results from already-fetched toolPartsByKey map
- recover-thinking-block-order: wrap SDK message fetches in try/catch
  so recovery continues gracefully on API errors
- thinking-strip: guard against missing part.id before calling
  deletePart to prevent invalid HTTP requests

src/hooks/session-recovery/storage/thinking-strip.ts

@@ -52,7 +52,7 @@ export async function stripThinkingPartsAsync(
 
     let anyRemoved = false
     for (const part of targetMsg.parts) {
-      if (THINKING_TYPES.has(part.type)) {
+      if (THINKING_TYPES.has(part.type) && part.id) {
         const deleted = await deletePart(client, sessionID, messageID, part.id)
         if (deleted) anyRemoved = true
       }