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/recover-thinking-block-order.ts

@@ -74,8 +74,13 @@ async function findMessagesWithOrphanThinkingFromSDK(
   client: Client,
   sessionID: string
 ): Promise<string[]> {
-  const response = await client.session.messages({ path: { id: sessionID } })
-  const messages = (response.data ?? []) as MessageData[]
+  let messages: MessageData[]
+  try {
+    const response = await client.session.messages({ path: { id: sessionID } })
+    messages = (response.data ?? []) as MessageData[]
+  } catch {
+    return []
+  }
 
   const result: string[] = []
   for (const msg of messages) {
@@ -103,8 +108,13 @@ async function findMessageByIndexNeedingThinkingFromSDK(
   sessionID: string,
   targetIndex: number
 ): Promise<string | null> {
-  const response = await client.session.messages({ path: { id: sessionID } })
-  const messages = (response.data ?? []) as MessageData[]
+  let messages: MessageData[]
+  try {
+    const response = await client.session.messages({ path: { id: sessionID } })
+    messages = (response.data ?? []) as MessageData[]
+  } catch {
+    return null
+  }
 
   if (targetIndex < 0 || targetIndex >= messages.length) return null
 

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
       }