feat(diff-view): add Branch section for full-branch diff vs default#2707

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SpielerNogard wants to merge 8 commits into

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SpielerNogard:emdash/diffview-z3mme

Commits on Jun 29, 2026

feat(diff-view): extend diff-group union with 'branch'
SpielerNogard
committed
feat(diff-view): add BranchDiffStore for branch-vs-default file list
SpielerNogard
committed
feat(diff-view): own BranchDiffStore and persist branchCompareMode
SpielerNogard
committed
feat(changes-panel): add Branch section with Committed/All toggle
SpielerNogard
committed
feat(diff-view): render branch diffs (committed + all modes)
SpielerNogard
committed
fix(diff-view): protect branch tabs from lifecycle-store and active-file corruption
SpielerNogard
committed
chore(diff-view): apply oxfmt formatting
SpielerNogard
committed
fix(diff-view): pin branch diff to merge-base in both modes
SpielerNogard
committed