fix(cloud-task): don't show file_unchanged read sentinel as sidebar content

[tatoalo]

Problem

In cloud tasks, opening a file the agent had created and read showed the wrong thing in the file sidebar, root cause: when the agent Reads a file that hasn't changed since its last read, claude returns a file_unchanged result whose content block is that "Wasted call…" sentinel, not the file body. The cloud file-panel reconstruction (extractCloudFileContent) treated any read tool call's content as the file body, so the sentinel became the displayed content and falsely flipped touched to true.

Changes

packages/core/src/task-detail/cloudToolChanges.ts:

• capture each tool call's rawOutput in ParsedToolCall / buildCloudEventSummary / mergeToolCall
• in extractCloudFileContent, skip reads whose rawOutput.type === "file_unchanged" so the dedup sentinel is never treated as content or touched. A real prior read/edit's content is preserved

[github-actions]

React Doctor found no issues in the changed files. 🎉

_{Reviewed by React Doctor for commit 4cb4601.}

[greptile-apps]

_{Reviews (1): Last reviewed commit: "fix(cloud-task): don't show file_unchang..." | Re-trigger Greptile}

[github-actions]

Focused bug fix in core task-detail logic — adds a sentinel guard to skip file_unchanged reads in extractCloudFileContent, with full test coverage. No showstoppers; all review comments resolved.

[greptile-apps]

_{Reviews (2): Last reviewed commit: "chore(cloud-task): fix biome formatting ..." | Re-trigger Greptile}