* Fix minimal mode toggle not properly updating titlebar state
UpdateTitlebarAccessoryController only re-evaluated titlebar accessories
on window focus events (didBecomeKey/didBecomeMain), not when the
presentation mode actually changed. This caused:
1. Switching to minimal: accessories weren't immediately removed
2. Switching back to standard: accessories were never re-attached
(removeAccessoryIfPresent cleared attachedWindows, but no event
triggered re-attachment)
3. Repeated toggling left the window in inconsistent states
Add a UserDefaults observer that detects presentation mode changes and
re-evaluates all windows. When switching to minimal, accessories are
removed; when switching to standard, fresh accessories are created and
attached. Also handle the fullscreen edge case where re-attached
accessories must be hidden to avoid doubling with SwiftUI overlay
controls.
* Hide window toolbar in minimal mode to eliminate titlebar gap
The NSToolbar (attached by WindowToolbarController) creates a non-zero
titlebar area even in minimal mode, leaving an empty gap above the
Bonsplit tab bar. In minimal mode there's no need for the toolbar (it
shows a "Cmd:" text that's hidden anyway with titleVisibility=.hidden).
Hide the toolbar when switching to minimal mode and restore it when
switching back to standard. Also set initial visibility on attachment
based on the current mode.
* Apply ignoresSafeArea to contentAndSidebarLayout in minimal mode
The titlebar gap persisted because intermediate SwiftUI views still
respected the window's safe area even though MainWindowHostingView
zeroes safeAreaInsets. Apply .ignoresSafeArea(.container, edges: .top)
directly to the contentAndSidebarLayout when in minimal mode so the
entire content (sidebar + terminal) extends into the titlebar area.
* Remove toolbar entirely in minimal mode instead of just hiding
toolbar.isVisible=false still reserves titlebar space. Remove the
toolbar entirely (window.toolbar=nil) when switching to minimal mode
and re-attach it when switching back to standard. Skip toolbar
attachment entirely when launching in minimal mode.
* Add BonsplitTabDragUITests.swift to cmuxUITests target
The test file existed on disk but was missing from the Xcode project,
causing all BonsplitTabDrag UI tests (including minimal mode tests) to
silently report 0 tests on CI.
* Use negative titlebar padding in minimal mode to extend content into titlebar
The native titlebar area (28.5pt for traffic lights) persists even
without a toolbar and despite .ignoresSafeArea() modifiers. Use
negative padding (-titlebarPadding) in minimal mode to pull the
terminal content up into the titlebar area. The sidebar's internal
trafficLightPadding spacer keeps sidebar content properly offset
below the traffic lights.
* Add window drag handle to Bonsplit top strip in minimal mode
In minimal mode, the custom titlebar (which provides the window drag
handle) is hidden. Add a WindowDragHandleView to the top strip overlay
so users can drag-to-move the window from the Bonsplit tab bar area.
The TitlebarDoubleClickMonitorView is kept as a background for
double-click-to-zoom.
* Use native titlebar drag in minimal mode instead of WindowDragHandleView
WindowDragHandleView defers to interactive siblings (Bonsplit tab bar),
so it never captures hits. Instead, set window.isMovable=true in
minimal mode so the native titlebar area handles drag-to-move and
double-click-to-zoom. Remove the non-functional overlay from
WorkspaceContentView.
* Enable isMovableByWindowBackground in minimal mode for window dragging
window.isMovable alone doesn't work because the Bonsplit tab bar
captures all hits before the native titlebar drag engages. Use
isMovableByWindowBackground=true so any area that doesn't handle
mouse events becomes a drag handle. Also capture
workspacePresentationMode in the WindowAccessor closure so the
window properties update when toggling modes.
* Add debug logging for minimal mode window drag diagnosis
* Intercept double-click in minimal mode tab bar to zoom instead of new tab
Bonsplit's EmptyTabBarDoubleClickMonitorView creates a new tab on
double-click in the tab bar empty space. In minimal mode, intercept
these double-clicks with a higher-priority local event monitor and
perform the standard macOS titlebar action (zoom/minimize based on
System Settings) instead. Only intercepts in the top 30pt strip and
only when minimal mode is active.
* Fix double-click monitor ordering and coordinate calculation
NSEvent local monitors are called LIFO (last installed first). Install
the minimal-mode double-click interceptor with a 0.5s delay so it's
added after Bonsplit's EmptyTabBarDoubleClickMonitorView monitors,
ensuring it runs first and can consume the event. Also fix the
distance-from-top calculation to use window frame height instead of
contentLayoutRect height, since the tab bar is in the titlebar area.
* Remove unnecessary delay from double-click monitor installation
* Show split buttons on hover only in minimal mode, fix sidebar controls re-attachment
Two fixes:
1. Add splitButtonsOnHover to BonsplitConfiguration.Appearance. In
minimal mode, the Bonsplit split buttons (terminal, browser, split
right/down) fade in only when hovering the tab bar. Revert to
always-visible when switching back to standard mode.
2. Delay titlebar accessory re-attachment when switching to standard
mode so the toolbar is re-added first. Without this, the accessory
attaches before the toolbar exists, causing the sidebar controls
to not appear in the titlebar.
* Fix splitButtonsOnHover via onChange instead of body eval, add debug logs
* Update bonsplit submodule for splitButtonsOnHover
* Remove debug logs, verified splitButtonsOnHover and accessory re-attachment on macmini
* Read presentationMode directly in TabBarView via @AppStorage
The @Observable configuration propagation wasn't reliably triggering
re-renders in TabBarView. Read the workspacePresentationMode directly
via @AppStorage in TabBarView instead, which SwiftUI reactively
updates when UserDefaults changes. Remove the syncSplitButtonsOnHover
workaround from WorkspaceContentView.
* Fix tab drag, double-click zone, and sidebar controls re-attachment
- Revert isMovableByWindowBackground to false; it breaks Bonsplit tab
reordering. Keep isMovable=true in minimal mode so the sidebar area
(which has WindowDragHandleView) is draggable.
- Increase double-click intercept zone from 30pt to 40pt to cover the
full tab bar height (33pt).
- Use asyncAfter(0.1s) for titlebar accessory re-attachment when
switching to standard mode, giving the toolbar time to re-attach.
* Add debug logging for titlebar accessory re-attachment diagnosis
* Fix crash and sidebar controls re-attachment
Remove debug logging that crashed when accessing window properties
during iteration. Increase deferred re-attachment delay to 0.3s to
give the WindowAccessor callback time to set the window identifier
and toolbar before attachIfNeeded checks isMainTerminalWindow.
* Keep titlebar accessories attached in minimal mode instead of removing
The remove/re-add cycle was fragile: re-attachment depended on window
identifiers being set, toolbar being re-added, and timing delays.
Instead, keep TitlebarControlsAccessoryViewController always attached
and let its own UserDefaults observer handle visibility. It already
hides itself (view.isHidden=true, preferredContentSize=.zero) in
minimal mode and shows itself in standard mode. No timing hacks needed.
* Force titlebar accessory layout after toolbar re-addition
* Use both self.isHidden and view.alphaValue/isHidden for accessory visibility
self.isHidden alone doesn't reliably hide the accessory when the
toolbar is nil on macOS 26. Add view.alphaValue=0 and view.isHidden
as visual fallbacks. Crucially, don't zero preferredContentSize or
frames so fittingSize returns valid values when switching back.
* Set window.isMovable=false always to fix sidebar button clicks
window.isMovable=true in minimal mode blocks clicks on the sidebar
controls because the native titlebar drag intercepts mouse events in
the overlapping area. The sidebar's WindowDragHandleView already
handles drag-to-move via performDrag with withTemporaryWindowMovableEnabled,
so native isMovable isn't needed.
* Add drag-to-move from empty bonsplit tab bar space in minimal mode
* Use overlay for tab bar drag, smart hitTest passes through tabs/buttons
* Add double-click zoom/minimize to tab bar drag view
* Add leading padding for traffic lights when sidebar collapsed in minimal mode
* Add traffic light inset to tab bar when sidebar collapsed in minimal mode
* Fix accessory space and double-click in minimal mode
- Zero preferredContentSize in minimal mode (so accessory takes no
space) but seed hostingView with cached size before querying
fittingSize when switching back (so size can be restored).
- Skip EmptyTabBarDoubleClickMonitorView in minimal mode so
DraggableTabBarView handles double-click for zoom instead.
- Remove redundant ContentView double-click monitor.
* Auto-detect traffic light inset in TabBarView via GeometryReader
Instead of propagating sidebar state through config, the tab bar
detects its own position relative to the window. If in minimal mode
and the tab bar's leading edge is near the window edge (< 20pt, no
sidebar), add 72pt spacer for traffic light clearance.
* Increase traffic light spacer to 80pt
* Fix tab click passthrough in minimal mode drag overlay
* Check full window for interactive hits in drag overlay
* Fix drag overlay capturing all clicks via reentrancy guard in hitTest
* Distinguish interactive controls from hosting views in drag hitTest
* Walk ancestor chain for button detection in drag overlay hitTest
* Replace overlay with background drag view per ensemble recommendation
* Only add traffic light inset for top-left pane
* Use GeometryReader for traffic light inset, check screen position
* Fix operator precedence in traffic light inset check
* Use window frame for traffic light inset detection
* Set tabBarLeadingInset from ContentView via onChange handlers
Replace unreliable coordinate-based detection with direct state from
ContentView, which knows both sidebar visibility and minimal mode.
Syncs on appear, sidebar toggle, and mode toggle.
* Use allPaneIds.first for top-left pane detection, no hierarchy threading needed
* Update bonsplit submodule to merged main
---------
Co-authored-by: Lawrence Chen <lawrencecchen@users.noreply.github.com>
Four call sites used `line.data(using: .utf8)!` to convert a String to
Data for FileHandle.write(). While .utf8 encoding never fails for Swift
strings (making the force unwrap safe in practice), `Data(line.utf8)` is
the idiomatic Swift equivalent that avoids the force unwrap entirely.
Changed files:
- GhosttyTerminalView.swift (3 occurrences: init log, surface log, size log)
- WorkspaceContentView.swift (1 occurrence: panel debug log)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* Honor Ghostty background-opacity across all cmux chrome
Parse background-opacity from Ghostty config and propagate it through
the entire chrome pipeline: bonsplit tab bar (via RRGGBBAA hex),
browser panel/omnibar, titlebar, empty panel, and window background.
Decouple glass effect from sidebar blend mode — bgGlassEnabled now
defaults to false so opacity works independently. Add
GhosttyBackgroundTheme helper for consistent color+opacity resolution
across all UI surfaces.
Fixes https://github.com/manaflow-ai/cmux/issues/263
* Titlebar and chrome opacity matches terminal background-opacity
Use CALayer-level opacity for the titlebar background instead of SwiftUI
Color alpha, matching the terminal's Metal compositing path. Account for
the double alpha stacking in the terminal area (Bonsplit container bg +
Ghostty renderer) so the titlebar visually matches.
Also fix opacity-only config changes not triggering titlebar refresh on
Cmd+Shift+, reload.
* Fix manual unread clear race on focused tab
* Add mark-as-read tab action and show ring for manual unread
* Flash then clear manual unread on tab focus
Replace @ObservedObject notificationStore in TerminalPanelView and
PanelContentView with a plain `let hasUnreadNotification: Bool`.
The parent WorkspaceContentView already subscribes to the store
via @EnvironmentObject; it now computes the per-panel Bool and
passes it down, so child views only re-render when their own
notification state actually changes.
Nested NSHostingController layers (from bonsplit's SinglePaneWrapper)
prevent AppKit's NSDraggingDestination routing from reaching terminal
views. Install a transparent FileDropOverlayView on the window's theme
frame that intercepts file drags and forwards drops to the GhosttyNSView
under the cursor. Mouse events pass through via a hide-send-unhide
pattern.
Fix y-axis inversion in split targeting: hitTest expects coordinates in
the receiver's superview's coordinate system, not the receiver's own.
Converting to contentView's coords flipped y because NSHostingView is
flipped, causing top/bottom split drops to land in the wrong terminal.
Also adds bonsplit onFileDrop API, PaneDragContainerView, and
drop_hit_test socket command for testing coordinate-to-terminal mapping.
* Fix multi-workspace drag/drop, WebView click focus, and add regression tests
- Wire bonsplit isInteractive to workspace active state so inactive
workspace NSViews are hidden from AppKit event routing
- Add CmuxWebView.mouseDown notification for browser panel focus
tracking (AppKit delivers clicks to WKWebView, not SwiftUI overlays)
- Add multi-workspace focus regression test covering isHidden fix,
rapid workspace switching, and browser panel focus routing
* Bump version to 1.36.0
* Fix terminal keys (arrows, Ctrl+N/P) swallowed after opening browser
After a browser panel is shown, SwiftUI's internal focus system activates
and its _NSHostingView starts consuming arrow keys and other non-Command
key events via performKeyEquivalent, preventing them from reaching the
terminal's keyDown handler.
Fix: In the NSWindow performKeyEquivalent swizzle, when GhosttyNSView is
the first responder and the event has no Command modifier, route directly
to the terminal's performKeyEquivalent — bypassing SwiftUI's view hierarchy
walk entirely.
Also clear stale browserAddressBarFocusedPanelId when a terminal surface
has focus, preventing Cmd+N from being eaten by omnibar selection logic
after focus transitions away from a browser.
Adds DEBUG-only keyboard event ring buffer (KeyDebugLog) that dumps to
/tmp/cmux-key-debug.log for diagnosing future key routing issues.
* Fix split focus and Cmd+Shift+N swallowed after opening browser
Split focus: capture the source terminal's hostedView before bonsplit
mutates focusedPaneId, so focusPanel moves focus FROM the old pane
instead of from the new pane to itself. Also retry ensureFocus when the
new terminal's view has no window yet (matching the existing retry
pattern for isVisibleInUI).
Cmd+Shift+N: after WKWebView has been in the responder chain, SwiftUI's
internal focus system can intercept Command-key events in the content
view hierarchy (returning true) without firing the CommandGroup action
closure. Fix by dispatching Command-key events directly to NSApp.mainMenu
when the terminal is first responder, bypassing the broken SwiftUI path.
Also add Cmd+Shift+N to handleCustomShortcut so it's customizable and
doesn't depend on SwiftUI menu dispatch at all.
* Unified debug event log: merge key/mouse/focus into /tmp/cmux-debug.log
- Delete KeyDebugLog, MouseDebugLog, klog(), mlog() from AppDelegate
- Replace all klog/mlog calls with dlog() (provided by bonsplit)
- Remove debugLogCallback wiring from Workspace
- Add focus change logging: focus.panel, focus.firstResponder,
split.created, focus.moveFocus
- Add import Bonsplit where needed for dlog access
- Fix stale drag state on cancelled tab drags (bonsplit submodule)
* Fix split focus stolen by re-entrant becomeFirstResponder during reparenting
During programmatic splits (Cmd+D / Cmd+Shift+D), SwiftUI reparents the old
terminal view, which fires becomeFirstResponder → onFocus → focusPanel for the
OLD panel, stealing focus from the newly created pane.
Add programmaticFocusTargetPanelId guard to suppress re-entrant focusPanel
calls for non-target panels during split creation.
Also document the unified debug event log in CLAUDE.md.
* Clear stale title/favicon when browser navigation fails
When a page fails to load (e.g. connection refused), the tab was still
showing the previous page's title and favicon. Now didFailProvisionalNavigation
resets pageTitle to the failed URL and clears faviconPNGData.
* Fix Cmd+N swallowed by browser omnibar and improve split focus suppression
- Only Ctrl+N/P trigger omnibar navigation, not Cmd+N/P (Cmd+N should
always create new workspace regardless of address bar focus)
- Move split focus suppression from workspace-level guard to source:
suppress becomeFirstResponder side-effects (onFocus + ghostty_surface_set_focus)
directly on the old GhosttyNSView during reparenting, preventing both
model-level and libghostty-level focus divergence
- Remove programmaticFocusTargetPanelId from Workspace.focusPanel
* Fix omnibar hang, WebView white flash, drag-over-browser, and idle CPU spin
- Omnibar: first click selects all without entering NSTextView tracking loop;
subsequent clicks have 3s synthetic mouseUp safety net to prevent hang
- WebView: set underPageBackgroundColor to match window so new browsers don't
flash white before content loads
- Drag/drop: register custom UTType (com.splittabbar.tabtransfer) in Info.plist
so WKWebView doesn't intercept tab drags; override registerForDraggedTypes
on CmuxWebView as belt-and-suspenders
- CPU: fix infinite makeFirstResponder loop in controlTextDidEndEditing by
checking both the text field and its field editor (the actual first responder)
* Fix blank terminal after split operations and add visual tests
## Blank Terminal Fix
- Add `needsRefreshAfterWindowChange` flag in GhosttyTerminalView
- Force terminal refresh when view is added to window, even if size unchanged
- Add `ghostty_surface_refresh()` call in attachToView for same-view reattachment
- Add debug logging for surface attachment lifecycle (DEBUG builds only)
## Bonsplit Migration
- Add bonsplit as local Swift package (vendor/bonsplit submodule)
- Replace custom SplitTree with BonsplitController
- Add Panel protocol with TerminalPanel and BrowserPanel implementations
- Add SidebarTab as main tab container with BonsplitController
- Remove old Splits/ directory (SplitTree, SplitView, TerminalSplitTreeView)
## Visual Screenshot Tests
- Add test_visual_screenshots.py for automated visual regression testing
- Uses in-app screenshot API (CGWindowListCreateImage) - no screen recording needed
- Generates HTML report with before/after comparisons
- Tests: splits, browser panels, focus switching, close operations, rapid cycles
- Includes annotation fields for easy feedback
## Browser Shortcut (⌘⇧B)
- Add keyboard shortcut to open browser panel in current pane
- Add openBrowser() method to TabManager
- Add shortcut configuration in KeyboardShortcutSettings
## Screenshot Command
- Add 'screenshot' command to TerminalController for in-app window capture
- Returns OK with screenshot ID and path
## Other
- Add tests/visual_output/ and tests/visual_report.html to .gitignore
* Add browser title subscription and set tab height to 30px
- Subscribe to BrowserPanel.$pageTitle changes to update bonsplit tabs
- Update tab titles in real-time as page navigation occurs
- Clean up subscriptions when panels are removed
- Set bonsplit tab bar and tab height to 30px (in submodule)
* Fix socket API regressions in list_surfaces, list_bonsplit_tabs, focus_pane
- list_surfaces: Remove [terminal]/[browser] suffix to keep UUID-only format
that clients and tests expect for parsing
- list_bonsplit_tabs --pane: Properly look up pane by UUID instead of
creating a new PaneID (requires bonsplit PaneID.id to be public)
- focus_pane: Accept both UUID strings and integer indices as documented
* Fix browser panel stability and keyboard shortcuts
- Prevent WKWebView focus lifecycle crashes during split/view reshuffles
- Match bracket shortcuts via keyCode (Cmd+Shift+[ / ], Cmd+Ctrl+[ / ])
- Support Ghostty config goto_split:* keybinds when WebView is focused
- Add focus_webview/is_webview_focused socket commands and regression tests
- Rename SidebarTab to Workspace and update docs
* Make ctrl+enter keybind test skippable
Skip when the Ghostty keybind isn't configured or when osascript can't send keystrokes (no Accessibility permission), so VM runs stay green.
* Auto-focus browser omnibar when blank
When a browser surface is focused but no URL is loaded yet, focus the address bar instead of the WKWebView.
* Stabilize socket surface indexing
* Focus browser omnibar escape; add webview keybind UI tests
- Escape in omnibar now returns focus to WKWebView\n- Add UI tests for Cmd+Ctrl+H pane navigation with WebKit focused (including Ghostty config)\n- Avoid flaky element screenshots in UpdatePillUITests on the UTM VM
* Fix browser drag-to-split blanks and socket parsing
* Fix webview-focused shortcuts and stabilize browser splits
- Match ctrl/shift shortcuts by keyCode where needed (Ctrl+H, bracket keys)
- Load Ghostty goto_split triggers reliably and refresh on config load
- Add debug socket helpers: set_shortcut + simulate_shortcut for tests
- Convert browser goto_split/keybind tests to socket-based injection (no osascript)
- Bump bonsplit for drag-to-split fixes
* Fix split layout collapse and harden socket pane APIs
* Stabilize OSC 99 notification test timing
* Fix terminal focus routing after split reparent
* Support simulate_shortcut enter for focus routing test
* Stabilize terminal focus routing test
* Fix frozen new terminal tabs after many splits
* Fix frozen new terminal tabs after splits
* Fix terminal freeze on launch/new tabs
* Update ghostty submodule
* Fix terminal focus/render stalls after split churn
* Fix nested split collapsing existing pane
* Fix nested split collapse + stabilize new-surface focus
* Update bonsplit submodule
* Fix SIGINT test flake
* Remove bonsplit tab-switch crossfade
* Remove PROJECTS.md
* Remove bonsplit tab selection animation
* Ignore generated test reports
* Middle click closes tab
* Revert unintended .gitignore change
* Fix build after main merge
* Revert "Fix build after main merge"
This reverts commit 16bf9816d0856b5385d52f886aa5eb50f3c9d9a4.
* Revert "Merge remote-tracking branch 'origin/main' into fix/blank-terminal-and-visual-tests"
This reverts commit 7c20fb53fd71fea7a19a3673f2dd73e5f0c783c4, reversing
changes made to 0aff107d787bc9d8bbc28220090b4ca7af72e040.
* Remove tab close fade animation
* Use terminal.fill icon
* Make terminal tab icon smaller
* Match browser globe tab icon size
* Bonsplit: tab min width 48 and tighter close button
* Bonsplit: smaller tab title font
* Show unread notification badge in bonsplit tabs and improve UI polish
Sync unread notification state to bonsplit tab badges (blue dot).
Improve EmptyPanelView with Terminal/Browser buttons and shortcut hints.
Add tooltips to close tab button and search overlay buttons.
* Fix reload.sh single-instance safety check on macOS
Replace GNU-only `ps -o etimes=` with portable `ps -o etime=` and
parse the dd-hh:mm:ss format manually for macOS compatibility.
* Centralize keyboard shortcut definitions into Action enum
Replace per-shortcut boilerplate with a single Action enum that holds
the label, defaults key, and default binding for each shortcut. All
call sites now use shortcut(for:). Settings UI is data-driven via
ForEach(Action.allCases). Titlebar tooltips update dynamically when
shortcuts are changed. Remove duplicate .keyboardShortcut() modifiers
from menu items that are already handled by the event monitor.
* Fix WKWebView consuming app menu shortcuts and close panel confirmation
Add CmuxWebView subclass that routes key equivalents through the main
menu before WebKit, so Cmd+N/Cmd+W/tab switching work when a browser
pane is focused. Fix Cmd+W close-panel path: bypass Bonsplit delegate
gating after the user confirms the running-process dialog by tracking
forceCloseTabIds. Add unit tests (CmuxWebViewKeyEquivalentTests) and
UI test scaffolding (MenuKeyEquivalentRoutingUITests) with a new
cmux-unit Xcode scheme.
* Update CLAUDE.md and PROJECTS.md with recent changes
CLAUDE.md: enforce --tag for reload commands, add cleanup safety rules.
PROJECTS.md: log notification badge, reload.sh fix, Cmd+W fix, WebView
key equiv fix, and centralized shortcuts work.
* Keep selection index stable on close
* Add concepts page documenting terminology hierarchy
New docs page explaining Window > Workspace > Pane > Surface > Panel
hierarchy with aligned ASCII diagram. Updated tabs.mdx and splits.mdx
to use consistent terminology (workspace instead of tab, surface
instead of panel) and corrected outdated CLI command references.
* Update bonsplit submodule
* WIP: improve split close stability and UI regressions
* Close terminal panel on child exit; hide terminal dirty dot
* Fix split close/focus regressions and stabilize UI tests
* Add unread Dock/Cmd+Tab badge with settings toggle
* Fix browser-surface shortcuts and Cmd+L browser opening
* Snapshot current workspace state before regression fixes
* Update bonsplit submodule snapshot
* Stabilize split-close regression capture and sidebar resize assertions
* Change default Show Notifications shortcut from Cmd+Shift+I to Cmd+I
* Fix update check readiness race, enable release update logging, and improve checking spinner
* Restore terminal file drop, fix browser omnibar click focus, and add panel workspace ID mutation for surface moves
* Add Cmd+digit workspace hints, titlebar shortcut pills, sidebar drag-reorder, and workspace placement settings
* Add v2 browser automation API, surface move/reorder commands, and short-handle ref system to TerminalController
* Add CLI browser command surface, --id-format flag, and move/reorder commands
* Extend test clients with move/reorder APIs, ref-handle support, and increased timeouts
* Harden test runner scripts with deterministic builds, retry logic, and robust socket readiness
* Stabilize existing test suites with focus-wait helpers, increased timeouts, and API shape updates
* Add terminal file drop e2e regression test
* Add v2 browser API, CLI ref resolution, and surface move/reorder test suites
* Add unit tests for shortcut hints, workspace reorder, drop planner, and update UI test stabilization
* Add cmux-debug-windows skill with snapshot script and agent config
* Update project docs: mark browser parity and move/reorder phases complete, add parallel agent workflow guidelines
* Update bonsplit submodule: re-entrant setPosition guard, tab shortcut hints, and moveTab/reorderTab API
* Add browser agent UX improvements: snapshot refs, placement reuse, diagnostics, and skill docs
- Upgrade browser.snapshot to emit accessibility tree text with element refs (eN)
- Add right-sibling pane reuse policy for browser.open_split placement
- Add rich not_found diagnostics with retry logic for selector actions
- Support --snapshot-after for post-action verification on mutating commands
- Allow browser fill with empty text for clearing inputs
- Default CLI --id-format to refs-first (UUIDs opt-in via --id-format uuids|both)
- Format legacy new-pane/new-surface output with short surface refs
- Add skills/cmuxterm-browser/ and skills/cmuxterm/ end-user skill docs
- Add regression tests for placement policy, snapshot refs, diagnostics, and ID defaults
* Update bonsplit submodule: keep raster favicons in color when inactive
