refactor(editor): move the add-note dialog to src/add-note.js (R2, step 40)

[byrongamatos]

What

Step 40 of the R2 refactor: move the add-note dialog (addNoteData state, showAddNote / hideAddNote, and the editorConfirmAddNote handler that commits an undoable AddNoteCmd) out of src/main.js into a new native ES module src/add-note.js. The boot-teardown machinery that shared the "Add note dialog" banner stays.

How the seam is drawn

• showAddNote / hideAddNote are host hooks — main.js imports them (the existing thunk/shorthand host wiring resolves by name) — plus 2 re-attached window handlers.
• addNoteData is exported as a live binding read by main.js's boot Enter-key handler across the module boundary.
• draw/updateStatus route through host. Removed 2 dead main.js imports (AddNoteCmd, noteToMidi).

main.js drops ~53 lines. 41 modules.

Verification

• 90/90 JS suites pass; ESLint gate clean (0 errors); strict no-undef clean on add-note.js.
• Codex preflight: 0 regressions.
• New headless harness (verify_add_note.py) double-clicks empty grid to open the dialog (proving showAddNote via the mouse host hook), confirms the default note (note count 3→4, proving editorConfirmAddNote + AddNoteCmd + host.draw), and undoes it (4→3) — zero page errors. Negative-checked by dropping a re-attach.

🤖 Generated with Claude Code

Summary by CodeRabbit

• New Features
  • Added an Add Note dialog for entering notes in fret or pitch mode.
  • Automatically positions the dialog and focuses the relevant input.
  • Supports note timing, string, fret, and sustain values with input validation.
  • Refreshes the editor and status display after adding a note.
• Bug Fixes
  • Improved dialog cleanup when closing the Add Note editor.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: e8db36c8-854d-4689-be64-7b99b1ba5edb

📥 Commits

Reviewing files that changed from the base of the PR and between 59e7e27 and d6e8251.

📒 Files selected for processing (2)

• src/add-note.js
• src/main.js

---

📝 Walkthrough

Walkthrough

The Add Note dialog implementation moves from src/main.js into a new src/add-note.js module. The module owns dialog state, input handling, note creation, command execution, and editor refreshes. Global editor handlers in main.js now delegate to the extracted functions.

Changes

Add Note extraction

Layer / File(s)	Summary
Add Note dialog module src/add-note.js	Adds shared dialog state and functions for showing, hiding, validating, and committing notes in fret-entry and pitch-entry modes.
Main editor integration src/main.js	Removes the inlined Add Note implementation and obsolete imports, then wires global editor handlers to the extracted module functions.

Estimated code review effort: 3 (Moderate) | ~20 minutes

Possibly related PRs

• got-feedBack/feedBack-plugin-editor#169: Refactors the AddNoteCmd implementation and related command imports used by the extracted Add Note flow.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	Clearly describes the main change: extracting the add-note dialog into src/add-note.js.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch refactor/r2-step40-add-note

---

_{Comment @coderabbitai help to get the list of available commands.}