chore: release v0.7.6

[winterdrive]

Summary

Integration release bundling the 6 routine maintenance PRs merged this cycle:

• [Routine - VT] fix: preserve sourceScopeId when duplicating a group #67 fix: preserve sourceScopeId when duplicating a group
• [Routine - VT] fix: set up FileSystemWatchers for scopes added after workspace folder change #68 fix: set up FileSystemWatchers for scopes added after workspace folder change
• [Routine - VT] fix(GroupManager): return structuredClone on cache-miss path to prevent cache corruption #69 fix(GroupManager): return structuredClone on cache-miss path to prevent cache corruption
• [Routine - VT] fix(BookmarkManager): use normalized membership check in createBookmark #73 fix(BookmarkManager): use normalized membership check in createBookmark
• [Routine - VT] fix(sendTo): guard against empty destFolders (Infinity step) #74 fix(sendTo): guard against empty destFolders (Infinity step)
• [Routine - VT] test(FileSorter): add unit tests for all sort criteria #75 test(FileSorter): add unit tests for all sort criteria

Version bump only: package.json, package-lock.json → 0.7.6, CHANGELOG.md updated with per-fix entries.

Test plan

• npm ci
• npm test → 25 suites / 175 tests passed, tsc -p ./ clean
• Manual local verification before merge (requested by maintainer) — hold off merging until confirmed

[winterdrive]

Ready to publish