fix: preserve locally modified bookmark titles, folders, and ordering during sync

[Preshy]

Summary

• Fix bookmark label/title reversion: When a user renames a bookmark locally (e.g., "incident" → "s"), the change was being overwritten by stale cloud data on the next sync. The locallyModifiedBookmarkIds protection only blocked index-only changes from cloud, but allowed title and folder changes through — assuming they were "meaningful edits from another browser." Now all cloud-driven updates are skipped for locally modified bookmarks, letting the local change survive the pull phase and get pushed to cloud.
• Fix bookmark ordering: Bookmarks were being moved to the end of the toolbar on sync instead of preserving their position (from prior commit on this branch).
• Version bump to v0.8.30

Root Cause

In categorizeCloudBookmarks and updateLocalBookmarksFromCloud, the locally-modified guard only skipped index-only cloud updates. Title and folder differences were allowed through unconditionally, overwriting local edits. By the time the push phase ran, the local title had already been reverted, so the checksum matched cloud and nothing got pushed — the user's change was silently lost.

[Copilot]

Pull request overview

This PR adjusts the extension’s two-way bookmark sync conflict-resolution so that locally modified bookmarks (including title/folder/order changes) are not overwritten by cloud data during the pull phase, and it refines ordering behavior to avoid “moved to end” outcomes. It also bumps versions to v0.8.30 across packages and browser manifests.

Changes:

• Skip all cloud→local updates for bookmarks tracked in locallyModifiedBookmarkIds (title/folder/index), ensuring local edits survive the pull and get pushed.
• Rework ordering behavior by creating bookmarks/folders without indices during pull and relying on a reorder pass, using a snapshot of user-modified IDs to avoid sync-driven pollution.
• Version bump to 0.8.30 across packages/apps/manifests.

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
apps/extension/src/background/index.js	Updates sync logic to fully protect locally modified bookmarks from cloud overwrites; adjusts ordering creation/reorder flow and adds a “user-modified IDs” snapshot.
apps/extension/src/manifest.chrome.json	Bumps extension version to 0.8.30.
apps/extension/src/manifest.firefox.json	Bumps extension version to 0.8.30.
apps/extension/src/manifest.safari.json	Bumps extension version to 0.8.30.
apps/extension/package.json	Bumps package version to 0.8.30.
apps/web/package.json	Bumps package version to 0.8.30.
packages/core/package.json	Bumps package version to 0.8.30.
packages/sources/package.json	Bumps package version to 0.8.30.
packages/types/package.json	Bumps package version to 0.8.30.
package.json	Bumps monorepo version to 0.8.30.

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