feat: configurable Archive hotkey, TODONT settings, and transition fixes

[salmonumbrella]

Summary

• Configurable Archive TODO hotkey via extension settings (default: Cmd/Ctrl+Shift+Enter)
• TODONT mode and hotkey settings moved into the main settings panel for discoverability
• Fixed ARCHIVED→TODO transitions: Cmd/Ctrl+Enter on an ARCHIVED block now correctly replaces with TODO instead of prepending TODO+ARCHIVED
• Fixed DONE transition detection: blocks edited from non-TODO to DONE now fire onDone callbacks via focusin/focusout tracking
• Improved click handler for TODO menu items using .closest() instead of fragile parent traversal
• Settled state reads: setTimeout wrappers so block text is read after Roam processes state changes
• Proper cleanup on extension unload (listeners, styles, command palette)

PR consolidates work from #11 and #13, which have been closed. The changes are tightly coupled (hotkey config depends on the transition fixes, and the settings panel reorganization touches the same code), so they're submitted together.

What was broken / missing?

• ARCHIVED blocks got a TODO+ARCHIVED prefix on Cmd/Ctrl+Enter instead of cleanly becoming TODO (Handle ARCHIVED => TODO #4)
• Checkbox logic was inverted — checked=DONE / unchecked=TODO callbacks were swapped (On Todo does not add text #8)
• Duplicate triggers fired from multiple event paths (Results in duplicate tasks #10)
• Archive hotkey was hardcoded with no way to customize it (Make Archive TODO hotkey configurable via Roam Hotkeys #11)

What changed?

• src/index.ts: settings panel gains TODONT mode + hotkey fields, ARCHIVED→TODO normalization on Cmd/Ctrl+Enter, focusin/focusout tracking for DONE detection, proper unload cleanup
• src/utils/todont.ts: hotkey registration via Roam command palette instead of raw keydown, ARCHIVED button styling via CSS class instead of text replacement, extracted todontCallback for reuse
• src/utils/normalizeTodoArchivedPrefix.ts (new): regex helper to collapse TODO+ARCHIVED into TODO

How was it verified?

Manual testing in Roam.

video-for-github.mp4

Test plan

• Cmd/Ctrl+Shift+Enter on a TODO block → becomes ARCHIVED
• Cmd/Ctrl+Shift+Enter on a DONE block → becomes ARCHIVED
• Cmd/Ctrl+Shift+Enter on an ARCHIVED block → ARCHIVED removed
• Cmd/Ctrl+Enter on an ARCHIVED block → becomes TODO (not TODO+ARCHIVED)
• Cmd/Ctrl+Enter on an multiple blocks → becomes ARCHIVED
• Change hotkey in settings → new hotkey works
• Toggle TODONT mode (off / icon / strikethrough) → styling updates live
• Edit a plain block to start with DONE → onDone callback fires

Closes #4, closes #8, closes #10.

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[salmonumbrella]

@mdroidian done + Loom! Ready for you.

[mdroidian]

@mdroidian done + Loom! Ready for you.

Hi — thank you for putting this together. I appreciate the effort here.

PRs that touch multiple concerns are significantly harder to review, and I have limited bandwidth right now. Following the guide helps ensure contributions can be reviewed and merged much more quickly.

https://github.com/RoamJS/contributing/blob/main/contributing.md

A couple adjustments are needed before this can move forward:

• One PR = One Issue — this PR currently spans multiple issues. Please split it into separate PRs (one per issue).
• Keep PRs small and tightly scoped per the size guidelines.

Once this is split up, I’ll be happy to take a look.

[salmonumbrella]

Splitting this into 3 smaller, focused PRs per the contributing guidelines (one issue per PR, <500 lines each). The changes will be submitted as stacked PRs:

1. Fix ARCHIVED → TODO transition (closes Handle ARCHIVED => TODO #4)
2. Fix TODO state detection and prevent duplicates (closes On Todo does not add text #8, Results in duplicate tasks #10)
3. Refactor TODONT module with configurable hotkey and bulk archive (new feature issue)

Each PR will be independently reviewable. The stacked approach ensures changes don't conflict since some fixes are prerequisites for others.