fix(tui): restore activity picker/edit behavior after runtime refactor

[ponbac]

Greptile Summary

This PR fixes a critical bug where the activity picker wouldn't properly load activities when editing historical entries after the runtime refactor. The fix ensures activities are loaded asynchronously via the action queue before opening the picker.

• Fixed duplicate key event processing by filtering to KeyEventKind::Press events only
• Refactored activity loading logic into reusable ensure_activities_for_project helper function
• Added OpenEditActivityPicker action to handle async activity loading in edit mode
• Improved UX by resetting activity picker search state on exit
• Added backspace shortcut to clear project/activity or note fields when timer is stopped
• Updated handle_entry_edit_enter signature to accept action queue for proper async handling

Confidence Score: 5/5

• This PR is safe to merge with minimal risk - it fixes real bugs and improves code quality
• The changes are well-structured, fix legitimate bugs (activity loading in edit mode, duplicate key events), and follow established patterns in the codebase. The refactoring improves code reusability without introducing breaking changes. All modifications are localized to the TUI runtime and properly handle async operations through the action queue.
• No files require special attention

Important Files Changed

Filename	Overview
toki-tui/src/runtime/event_loop.rs	Added KeyEventKind::Press filter to prevent duplicate key event processing from key releases
toki-tui/src/runtime/action_queue.rs	Added OpenEditActivityPicker action to support async activity loading when editing entries
toki-tui/src/runtime/actions.rs	Refactored activity loading into reusable ensure_activities_for_project helper; updated handle_entry_edit_enter to use action queue for async operations
toki-tui/src/app/mod.rs	Added clear_project_activity and clear_note methods; activity picker now resets search state on exit for clean re-entry
toki-tui/src/runtime/views/timer.rs	Added backspace handling to clear project/activity or note when timer is stopped; updated call to handle_entry_edit_enter with action queue parameter
toki-tui/src/runtime/views/history.rs	Updated call to handle_entry_edit_enter to pass action queue parameter for async activity loading

_{Last reviewed commit: 0e4dfda}

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Project	Deployment	Actions	Updated (UTC)
toki2	Ready	Preview, Comment	Feb 28, 2026 0:20am

[chatgpt-codex-connector]

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[greptile-apps]

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[alxhall]

Tested and verified, so I believe this should be safe to merge!