feat: remember preview/edit mode per note

[jancborchardt]

In Nextcloud Notes for Android, currently the Preview/Edit toggle in the top right of the note detail view changes this setting for all notes. It would be nice to have the setting remembered implicitly per note.

This is nice if you have some notes which are usually more useful in view-mode, like a packlist or grocery list where you want to check off items.

Summary

• Adds a noteMode column to the Note table (DB migration 29 → 30) to persist each note's view mode locally
• When a user explicitly toggles Preview/Edit/Direct Edit, the selected mode is saved immediately to that note
• Notes that have never been toggled continue to follow the global preference (Settings → Note display mode) unchanged
• Also commits the missing 29.json schema file required for the existing @AutoMigration(from = 28, to = 29)

Resolves the existing TODO comment in EditNoteActivity.close():

TODO enhancement: store last mode in note

How it works

getPreferenceMode() now checks the note's stored noteMode first, and only falls back to the global SharedPreference if no per-note mode is set. changeMode() persists the new mode to the note immediately on toggle.

Test plan

• Open a note → toggle to Preview → back out → re-open: should open in Preview
• Open a different note that was never toggled: should open in the global default mode
• Change Settings → Note display mode: notes with no per-note mode should follow the new setting; notes with a stored mode should not
• Toggle a note to Edit → close → re-open: should open in Edit
• Upgrade from a previous install: existing notes should open in the global default (no stored mode), new toggles are remembered

🤖 Generated with Claude Code

[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

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🟢 Metrics 5 complexity

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[tobiasKaminsky]

How will this work with?

As far as I can see from code side, it would always use per-note setting?
But it should only keep it if last one is selected?
Or do we wanna change this to "First opening behaviour" (and remove "remember").

Then user can select what they want to do with new notes, and all other notes remember their last behaviour?

[github-actions]

APK file: https://github.com/nextcloud/notes-android/actions/runs/28641578560/artifacts/8059004566
To test this change/fix you can simply download above APK file and install and test it in parallel to your existing Nextcloud app.
(please click on link to get QR code displayed)

[github-actions]

APK file: https://github.com/nextcloud/notes-android/actions/runs/29742449519/artifacts/8461014167
To test this change/fix you can simply download above APK file and install and test it in parallel to your existing Nextcloud app.
(please click on link to get QR code displayed)

[jancborchardt]

@tobiasKaminsky yeah, makes sense, adjusted and removed the remember option, as it always remembers. Evveryone who had "Remember last" selected now defaults to "Edit" for untouched notes and their per-note toggles are remembered going forward.

@alperozturk96 your review comments are also addressed. :)

[github-actions]

APK file: https://github.com/nextcloud/notes-android/actions/runs/29743282507/artifacts/8461412104
To test this change/fix you can simply download above APK file and install and test it in parallel to your existing Nextcloud app.
(please click on link to get QR code displayed)