The smart-copy gate only entered its selection-check block behind
hasSelection(), so a selection-less Ctrl+Shift+C skipped straight to
`return true` and ceded the keystroke to the browser's own handling
(e.g. Chrome's Inspect-Element binding) instead of matching Pane A's
"never falls through" contract for that chord.
Verified live in a real browser that this is a UX-parity fix, not an
interrupt-safety one: xterm's evaluateKeyboardEvent never emits PTY
data for a shifted ctrl-letter regardless of any gate (only "_" and
"@" get special-cased), so no accidental 0x03 was ever at risk. The
regression test added here asserts on the dispatched event's
defaultPrevented rather than the absence of a WS frame, since the
frame-count check passes vacuously for this exact key combo whether
or not the gate fires.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
- buildSplitPickerSessions() now excludes any session with pid === null
(exited CLI, tripped PTY-exit breaker, a restore that never re-attached).
Pane B has no equivalent of selectSession()'s auto re-attach POST, so a
split opened onto one had nothing reading its tmux pane: no terminal
events ever arrived and Session.write() silently dropped every keystroke
with no ack either way, while the socket itself reported healthy.
- Fixed the hollow chord regression test: the synthetic keydowns carried no
keyCode, which is what xterm's evaluateKeyboardEvent switches on to
produce a data frame at all, so the assertion held regardless of whether
the gate fired. Adding real keyCodes surfaced a second, real bug in the
Alt+B case: the event bubbles to app.js's own document-level shortcut
dispatcher, which really toggles the sidebar and resets the layout
attribute the gate reads before Pane B's own (later, non-capture) handler
ever sees it — fixed by driving the app's real settings cache instead of
only the DOM attribute.
- Ported the two remaining primary-pane gates with real consequences:
Ctrl+Z (SIGTSTP) is swallowed for every non-shell session, matching
terminal-ui.js's reasoning (an Ink/TUI agent loop stops dead with no
visible output otherwise), and Shift/Ctrl+Enter now POSTs to
/api/sessions/:id/send-key for THIS pane's own session instead of
letting xterm send a bare \r, which used to submit an incomplete prompt
instead of inserting a newline. Smart-copy Ctrl+C is re-implemented
against Pane B's own terminal (copying app.copyTerminalSelection() would
have copied Pane A's selection instead).
- Updated docs/architecture-invariants.md and docs/split-pane-sessions-plan.md
to match, and added CLAUDE.md's missing .split-picker-menu z-index entry.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Pane B had no attachCustomKeyEventHandler of its own, so the document
capture-phase shortcut handler's preventDefault() (which does not stop
xterm) left Ctrl+K/Alt+1/Alt+B ALSO writing their raw byte/escape
sequence into Pane B's live PTY on top of whatever the app action did
to Pane A. Pane B now installs the same registry-aware gates the
primary pane's own attachCustomKeyEventHandler uses. Ctrl+V is left on
xterm's default paste — no image-paste trap to route it to.
Plus the rest of the review's smaller items:
- Narrowing the window past the desktop gate now closes an open split
instead of leaving it stranded on screen.
- Split is refused while a web tab is active (activeWebviewId), which
used to open Pane B's socket behind a hidden container.
- Pane B now handles the server's `{t:'r'}` refresh frame via a shared
_loadBuffer() helper (also used by connect()), instead of ignoring it.
- The divider drag now uses pointer events + setPointerCapture (mirrors
tab-rail-resize.js), a button!==0 guard, preventDefault, and a
body.split-pane-resizing cursor/selection lock — a plain mousedown
drag selected the text under the cursor as it crossed both terminals.
- Pane B's close control and the picker rows are real <button>s now
(keyboard-reachable), with matching CSS chrome resets.
- Dropped the redundant CodemanBase.base prefix on the buffer fetch
(the global fetch wrapper already applies it).
- data-preview-order for the Split settings chip moved from a collision
with Ultracode Agents (both 15/12) to 11.5, matching its real
position between Multi-monitor and Ultracode Agents in the header;
widened test/app-settings-structure.test.ts's regex to allow the
decimal (Number() already parses it fine for the preview sort).
- Added zh-CN i18n entries for the Split button and empty-picker text.
- Dropped the stray unused `vi` import Ark0N flagged as unrelated to
this feature (vitest's `globals: true` makes it ambient anyway).
- Documented the fix and the deliberate no-cid/seq choice in the
split-pane-sessions architecture-invariants entry.
Added a real-Chromium regression test asserting Ctrl+K/Alt+1/Alt+B
dispatched at Pane B's own textarea send no `{t:'i'}` frame over its
WebSocket. Full CI gate green (409 files, 7736 tests) plus all 8
split-pane browser tests.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Real-browser regression coverage for the previous commit:
- SplitTerminalPane connects onto an already-quiet session and shows its
existing scrollback with no new output, proving the ?full=1 fetch (not
a live echo) populated the pane.
- openSplitPane() force-resizes Pane A synchronously as part of opening
a split.
- Dragging the divider force-resizes Pane A once, at drag end.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
