Reapply the remembered panel selection when entering focus mode and keep the visible focus border in sync with the active panel state.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Bumps the npm_and_yarn group with 1 update in the / directory: [@xmldom/xmldom](https://github.com/xmldom/xmldom).


Updates `@xmldom/xmldom` from 0.8.12 to 0.8.13
- [Release notes](https://github.com/xmldom/xmldom/releases)
- [Changelog](https://github.com/xmldom/xmldom/blob/master/CHANGELOG.md)
- [Commits](xmldom/xmldom@0.8.12...0.8.13)

---
updated-dependencies:
- dependency-name: "@xmldom/xmldom"
  dependency-version: 0.8.13
  dependency-type: indirect
  dependency-group: npm_and_yarn
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

#84)

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Cmd/Ctrl+Shift+Up/Down scrolls one line, Cmd/Ctrl+Shift+PgUp/PgDn
scrolls one page. Dispatched on the terminal layer so the PTY never
sees the key.

Without a terminal, the shell section has no internal resize handle and
its single-row toolbar sits flush against the panels above and below. Add
6px of top/bottom padding (matching the resize-handle height) and grow
the reserved size to 40px so the Terminal button gets the same breathing
room it has when a terminal is open.

Stale local main (fetched but not pulled) caused worktree diffs to include
the origin-vs-local delta: git resolved bare `main` to refs/heads/main,
putting the merge-base at the old tip instead of the worktree's actual
branch point.

Drop the reactive `requestSize` + neighbor-absorb loop in favor of native
CSS flex. Each ResizablePanel child is `flex: 0 0 auto` (content-sized),
one or more `absorberId` children get `flex: 1 1 0`, and a user-drag pin
(stored in `panelUserSize`) overrides with `flex: 0 0 Xpx`. Drag releases
never pin a sole absorber, so the AI terminal always fills remaining
height; multi-absorber trees (notes/changed-files) still honor pins so
user splits survive. Content-side min/max heights declared inline on each
panel body. One-shot migration wipes stale `task:*` pins from prior
iterations; `tiling:*` and `sidebar:*` pins carry over. New tests cover
the ui API and the panelUserSize migration.

- Fix panel-entry leak in cleanupPanelEntries: match task:${id}:* and
  tiling:${id} key shapes, not just bare id.
- Tighten isStringNumberRecord to reject NaN/Infinity/negatives and cap
  at MAX_PANEL_PX so a corrupted state file can't propagate NaN pixels.
- ResizablePanel: memoize absorberSet, replace children[idx*2] indexing
  with wrapperRefs, rename absorberId to absorberIds (always array),
  self-heal stale sole-absorber pins via a createEffect, simplify unpin.
- TilingLayout: wrap wheel-zoom loop in batch() so consumers re-run once
  per tick instead of once per key.
- Tests: new core.test.ts for cleanupPanelEntries key shapes; extra
  validator cases in persistence.test.ts.

Steps panel was content-sized with only `height: 100%`, so a long step
list could balloon the panel and push the AI terminal and prompt below
the visible area. Add `max-height: 40vh` so the internal scroll body
takes over past that cap.

Shell-section natural height drops from 200 → 140 px in non-focus mode.
The drag floor was already 28 px via the PanelChild minSize, but 200 px
combined with overflow:hidden made smaller sizes feel useless because
the content was clipped rather than compressed.

Stack-mode shell-section is a non-absorber, so a user drag locks its
wrapper to a pixel pin. When the last terminal closed, the inner content
collapsed to the 28 px toolbar but the wrapper kept the pinned height,
leaving an empty band above the AI terminal. Delete the pin reactively
so the flex-first tree falls back to content size and the absorber
reclaims the space.

Replaces hardcoded "main" text throughout MergeDialog with the resolved
base branch from the task (or backend detection) so users can see which
branch they are merging into when it isn't main.

The previous rule (commit 50e24db) always preferred origin/<branch>
over local <branch> when both existed. That fixed one failure mode —
stale local main leaking the origin-vs-local delta into the diff —
but introduced the inverse: when local <branch> is ahead of origin
(user merged a PR locally without pushing, or pulled into <branch>
after creating the worktree), the merge-base against origin/<branch>
is older than the worktree's actual branch point, so commits already
on local <branch> appear as feature-branch changes.

Either ref can be stale; the merge-base closer to HEAD is always
right. The new pickMergeBase computes both candidate merge-bases and
keeps whichever is a descendant of the other; on divergence (both
refs picked up commits the other lacks since the branch point) it
prefers local, since that is what the user thinks they branched from.

All diff-base call sites — getChangedFiles, getAllFileDiffs,
getFileDiff, computeBranchDiffStats, getChangedFilesFromBranch,
getAllFileDiffsFromBranch, getFileDiffFromBranch — now route through
the new picker via detectMergeBase. The redundant inline merge-base
lookup inside getFileDiffFromBranch is removed. resolveBaseRef is
deleted. Spec deltas live in openspec/changes/auto-detect-diff-base/.

In focus-mode split layout, shell-section is the right-column flex
absorber. The inner div's `min-height: max(200px, 33vh)` exists to give
the panel a sensible default size when content-sized — but as the
absorber it overflowed the wrapper once steps grew and compressed the
column, and xterm sized to the 33vh inner. The wrapper's overflow:hidden
then clipped the bottom of the terminal output.

Fall back to a 0 floor when this section is the absorber so the inner
shrinks with the wrapper and xterm fits the visible area.