fix(patch): cherry-pick d03496b to release/v0.15.2-pr-13099 to patch version v0.15.2 and create version 0.15.3

[gemini-cli-robot]

This PR automatically cherry-picks commit d03496b to patch version v0.15.2 in the stable release to create version 0.15.3.

[gemini-code-assist]

Summary of Changes

Hello @gemini-cli-robot, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request consolidates the UI's warning display logic by introducing a generic warningMessage state, allowing for more flexible warning notifications. It also addresses potential issues with large paste operations by significantly extending the paste timeout duration and providing a user-facing warning if a paste operation fails due to a timeout. This improves the user experience by providing clearer feedback for various UI-related events.

Highlights

• Unified Warning System: The UI state management for warnings has been refactored to use a single warningMessage state variable, replacing the previous selectionWarning boolean. This allows for more generic and flexible display of warning messages to the user.
• Enhanced Paste Timeout Handling: A new mechanism has been implemented to detect and display a warning when a paste operation times out. The PASTE_TIMEOUT constant has been significantly increased from 50ms to 30,000ms (30 seconds) to accommodate larger paste operations, and an AppEvent.PasteTimeout is now emitted upon timeout.
• Event-Driven Warning Integration: The new paste timeout warning is integrated into the existing event-driven system, utilizing AppEvent.PasteTimeout to trigger the display of the relevant message, aligning with how other UI warnings are handled.

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[gemini-code-assist]

Code Review

This pull request refactors the warning message system to be more generic and fixes an issue with paste operations timing out too quickly. A new warning message is now displayed when a paste times out. The changes are a good improvement, but I've identified one high-severity issue where partially pasted content is processed upon timeout, which could lead to unintended behavior. I've provided a suggestion to fix this.

[gemini-code-assist]

Upon a paste timeout, a warning is correctly emitted. However, the partially pasted content in the buffer is still processed afterwards. This can lead to the execution of incomplete and potentially erroneous commands. To prevent this, the buffer should be cleared when a timeout occurs.

Suggested change

	if (key === null) {
	appEvents.emit(AppEvent.PasteTimeout);
	break;
	}
	if (key === null) {
	appEvents.emit(AppEvent.PasteTimeout);
	buffer = '';
	break;
	}

[github-actions]

Size Change: +401 B (0%)

Total Size: 20.5 MB

ℹ️ View Unchanged

Filename	Size	Change
./bundle/gemini.js	20.5 MB	+401 B (0%)
./bundle/sandbox-macos-permissive-closed.sb	1.03 kB	0 B
./bundle/sandbox-macos-permissive-open.sb	890 B	0 B
./bundle/sandbox-macos-permissive-proxied.sb	1.31 kB	0 B
./bundle/sandbox-macos-restrictive-closed.sb	3.29 kB	0 B
./bundle/sandbox-macos-restrictive-open.sb	3.36 kB	0 B
./bundle/sandbox-macos-restrictive-proxied.sb	3.56 kB	0 B

_{compressed-size-action}

[jacob314]