* feat(whats-new): remote release notes with dev workspace mode
Add WHATS_NEW.md, CI whats-new.md asset upload, and client fetch/cache
with embedded fallbacks. Dev and -dev builds read the full file from the
repo for debugging; RC/stable download the release asset on first use.
* fix(whats-new): render ## headings and add changelog tab
Parse h2 sections in release-notes markdown; load changelog alongside
highlights and let users switch views on the What's New page.
* fix(whats-new): prefetch on startup and fix CI typecheck prebuild
Prefetch whats-new asset when the shell loads on RC/stable builds.
Run prebuild:release-notes before tsc and coverage jobs so the
gitignored generated bundle exists in CI.
* docs: CHANGELOG and credits for What's New remote notes (PR #1058)
* fix(whats-new): always slice embedded release notes to current line
Drop full CHANGELOG embed for -dev bundles; tauri:dev still reads live
markdown from the repo. Ignore all of src/generated/ in git.
* fix(whats-new): fetch release asset via Rust to bypass CORS
Route whats-new.md download through fetch_url_bytes; rename the
technical tab label; add fetch unit tests (PR #1058 review).
cucadmuh