cloud sidebar polish: hover, my devices copy and refresh, empty rows, tab switch glide

[lucasr1b]

Summary

Closes #18498

polish for the cloud sidebar and the right sidebar's tab bar:

• hover: the team chip and banner close buttons get hover. the chip's menu anchor sat on top of the button and swallowed the pointer, so it now tracks hover itself
• my devices: the empty row says "no devices yet" (the catalog still said "no other macs yet"), and its refresh only refreshes devices instead of the whole fleet
• empty rows: "no cloud machines yet" and "no devices yet" get an 18 pt row instead of sitting centered in a 22 pt one, so they hug their header
• refresh icon: sits right after the count (~6 pt instead of ~10 pt)
• tab bar: one selection pill slides between tabs on a quick spring (0.28 / 0.9) and labels swap straight away. open as pane stays in place (disabled, with a tooltip) on dock and feed, so tab widths no longer jump

Before (cloud sidebar)	After (cloud sidebar)

Testing

• scripts/verify-local.py --swift-changed origin/main: 8/8 passed; localization catalog complete
• CloudTeamPickerMenuTests (20) passed in hosted run 38041719063; CloudWorkspaceCreationRevealTests.closingTheWindowDuringShortcutReleasesItsManager fails unchanged on main
• built and checked by hand as tagged app devcopy at 360507cfe07

Changelog

Fixed: Cloud sidebar buttons highlight on hover, My Devices says "No devices yet" and refreshes on its own, and the right sidebar tabs switch with one sliding highlight

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Summary by cubic

Adds hover to the Cloud sidebar's team chip and banner close buttons, fixes the My Devices empty state and refresh, and gives the right sidebar's tab bar a sliding selection pill.

The team chip's menu anchor overlay takes the pointer, so it now owns hover tracking and hosts the chip itself; hover re-syncs when the menu closes, on window detach, and after reattachment or tracking-area rebuilds, with one lifecycle owner. Banner close buttons match the sidebar's icon-button hover. My Devices empty row now says "No devices yet" and refreshes only devices; Cloud Machines refreshes only the fleet. Empty rows use an 18 pt height in the compact sidebar, and the refresh icon sits right after the count. The right sidebar tabs share one sliding selection pill on a quick spring (0.28/0.9) with labels swapping immediately, and "Open as pane" stays in place (disabled, with a tooltip) on Dock and Feed so tab widths don't jump.

• Adds regression tests for team chip hover: enter/exit, stale tracking events, window detach/reattach, and menu-close reconciliation.

^{Written for commit 91e1d58. Summary will update on new commits.}

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Note

Low Risk
Localized macOS UI and AppKit overlay hover lifecycle; no auth, data, or networking changes.

Overview
Fixes missing hover on Cloud chrome where pointer handling blocked SwiftUI’s onHover.

Team picker chip: The AppKit menu anchor overlay now owns NSTrackingArea hover, hosts the visible chip in an NSHostingView via a makeChip closure, and keeps highlight in sync while the menu is open, after dismiss (re-reads pointer because menu tracking swallows exits), and across window detach/reattach and tracking-area rebuilds. CloudTeamPickerRow keeps a transparent SwiftUI button for size, keyboard, and accessibility while the anchor draws the chip with Invite-style row highlight fill and existing pill foreground rules.

Banner close: CloudBannerDismissButton adds hover (primary glyph + 6 pt primary fill at 0.06), aligned with sidebar icon buttons.

Tests: CloudTeamPickerMenuTests adds coverage for enter/exit, stale tracking events, window lifecycle, and post-menu hover reconciliation.

^{Reviewed by Cursor Bugbot for commit 2cbe04e. Bugbot is set up for automated code reviews on this repo. Configure here.}

Summary by CodeRabbit

• Style
  • Cloud banner dismiss buttons show a subtle highlighted appearance on hover, with a brighter icon and faint background fill.
  • The team picker trigger highlights on hover or while its menu is open, matching the app’s row highlight style. Highlighting is suppressed when the control is disabled.
• Tests
  • Added coverage for team picker hover behavior, including pointer entry and exit, menu dismissal, and changes to the view’s window or tracking area.

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📥 Commits

Reviewing files that changed from the base of the PR and between d3de1ca and 5e718c9.

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📒 Files selected for processing (1)

• cmuxTests/CloudTeamPickerMenuTests.swift

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📝 Walkthrough

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Walkthrough

The cloud banner dismiss button and team picker trigger update their appearance based on hover. The team picker anchor reports pointer entry and exit, and reconciles hover after tracking-area changes, menu tracking, and window transitions.

Changes

Cloud banner dismiss hover

Layer / File(s)	Summary
Dismiss button hover styling Packages/macOS/CmuxCloud/Sources/CmuxCloud/Banners/CloudBannerDismissButton.swift	The dismiss button tracks pointer hover. It uses primary foreground color and a faint rounded fill while hovered, and secondary foreground color otherwise.

Cloud team picker hover

Layer / File(s)	Summary
Menu anchor hover tracking Sources/Cloud/CloudTeamPickerMenuAnchor.swift, cmuxTests/CloudTeamPickerMenuTests.swift	The menu anchor reports pointer entry and exit, ignores stale tracking-area events, and reconciles hover after tracking-area changes, window transitions, and menu tracking. Tests cover duplicate events, exit, resize, detachment, reattachment, and menu dismissal.
Picker trigger highlighting Sources/Cloud/CloudTeamPickerRow.swift	The row highlights the trigger when enabled and hovered or when its menu is presented. The anchor supplies hover state instead of a button-level hover handler.

Priority: ➖ Normal

Estimated code review effort: 3 (Moderate) | ~20 minutes

Change: Bug fix · Severity of issue fixed: Medium

Sequence Diagram(s)

sequenceDiagram
  participant Pointer
  participant CloudTeamPickerMenuAnchorView
  participant CloudTeamPickerMenuAnchor
  participant CloudTeamPickerRow
  Pointer->>CloudTeamPickerMenuAnchorView: Enter or exit trigger
  CloudTeamPickerMenuAnchorView->>CloudTeamPickerMenuAnchor: Report hover state
  CloudTeamPickerMenuAnchor->>CloudTeamPickerRow: Update isHovered binding
  CloudTeamPickerMenuAnchorView->>CloudTeamPickerMenuAnchorView: Reconcile pointer position after menu tracking

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Suggested reviewers: austinywang

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Merge Risk: ⚪ Minimal · up to 5e718

The hover styling and lifecycle changes are ready to merge, subject to normal CI validation.

Pre-merge checks | 24 | 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 78.26% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 23 functions across 4 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (24 passed)

Check name	Status	Explanation
Linked Issues check		The changes satisfy the coding requirements in [#18498]. CloudTeamPickerMenuAnchorView ignores stale exits from replaced tracking areas and synchronizes hover from the window pointer after tracking-…
Out of Scope Changes check		The changes stay within [#18498] and the stated PR scope. The anchor lifecycle, team-chip highlight, banner close-button hover, and focused tests directly support the requested Cloud hover behavior. N…
Cmux Cloud Persistent Session And Early Input		PASS. The pull request changes only Cloud UI hover behavior and its tests: CloudBannerDismissButton, CloudTeamPickerMenuAnchor, CloudTeamPickerRow, and CloudTeamPickerMenuTests. The diff does …
Cmux Swift Actor Isolation		PASS: The production diff adds hover state and pointer lifecycle handling only to SwiftUI/AppKit UI types. CloudBannerDismissButton and CloudTeamPickerRow are View types, and `CloudTeamPickerMen…
Cmux Swift Blocking Runtime		PASS. The production Swift diff adds hover state, NSTrackingArea handling, and synchronous pointer reconciliation. It does not add semaphores, blocking waits, sleeps, delayed dispatch, polling, main-q…
Cmux Browser Automation Off-Main		The pull request changes only Cloud hover UI and tests in four files: CloudBannerDismissButton.swift, CloudTeamPickerMenuAnchor.swift, CloudTeamPickerRow.swift, and `CloudTeamPickerMenuTests.swi…
Cmux Expensive Synchronous Load		The production diff only adds hover state, AppKit tracking-area synchronization, menu presentation handling, and SwiftUI styling. It adds no RestorableAgentSessionIndex.load(), agent-store or transc…
Cmux Cache Substitution Correctness		The production diff adds transient hover state only. CloudBannerDismissButton stores isHovered in SwiftUI @State, and CloudTeamPickerRow receives the anchor's pointer state to control foregrou…
Cmux No Hacky Sleeps		The pull request changes only four Swift files: three production Swift files and one Swift test file. It introduces no TypeScript, JavaScript, shell, or build/runtime-script changes, so the `runtime-n…
Cmux Algorithmic Complexity		No algorithmic-complexity violation is introduced. The production diff adds constant-time hover state updates, tracking-area replacement, pointer/bounds checks, and fixed-size UI styling in `Sources/C…
Cmux Swift Concurrency		The diff does not introduce or materially expand a disallowed legacy async pattern. The production changes add AppKit tracking callbacks and synchronous pointer reconciliation. RunLoop.main.perform …
Cmux Swift @Concurrent		The Swift diff introduces no @concurrent or nonisolated async declarations. Its added asynchronous call sites (Task { await ... }) remain UI-bound coordination closures and do not introduce CPU-…
Cmux Swift Package Boundaries		The diff adds hover presentation state to CloudBannerDismissButton and adds AppKit tracking plus SwiftUI binding in CloudTeamPickerMenuAnchor/CloudTeamPickerRow. These changes are UI and AppKit …
Cmux Swiftpm Lockfiles		The pull request changes only three Swift source files and one test file. It does not change a SwiftPM package, Xcode project package references, .gitignore, workflows, or dependencies. The SwiftPM …
Cmux Swift Logging		The reviewed Swift diff adds hover state, tracking-area lifecycle handling, UI styling, and tests. It adds no print, debugPrint, dump, NSLog, Logger, file/stdout logging, or diagnostic loggi…
Cmux User-Facing Error Privacy		PASS. The production diff changes hover state and visual styling for the Cloud team chip and banner close button. It does not add or change user-facing error, alert, command-output, API-error, or reco…
Cmux Full Internationalization		PASS: The production diff adds hover state and pointer tracking only. It does not add or materially change user-facing text, localization keys, catalogs, web messages, or metadata. The existing banner…
Cmux Swiftui State Layout		PASS: The diff adds only local @State hover values and an @Environment read. It does not add ObservableObject, @Published, @StateObject, or @EnvironmentObject, and it adds no `GeometryRead…
Cmux Architecture Rethink		The diff is a small, local AppKit hover bridge with clear ownership. It adds synchronous pointer reconciliation, stale tracking-area filtering, and lifecycle cleanup. It does not add sleeps, delayed d…
Cmux Swift Auxiliary Window Close Shortcuts		The PR does not add or materially change a standalone cmux-owned window. Production changes affect an NSView tracking overlay and SwiftUI hover styling only. The only added NSWindow subclass, `HoverWi…
Cmux Source Artifacts		The pull request changes only four intentional Swift source/test files. The diff adds hover behavior and focused regression tests; it adds no logs, screenshots, recordings, temporary directories, cach…
Cmux No Test Or Debug Seam In Production Source		No production test/debug seam was added. The changed Sources/ files add product hover behavior only; CloudTeamPickerMenuAnchorView.onHoverChange is assigned by updateNSView, and `handleMouseEnte…
Title check		The title clearly summarizes the pull request's main Cloud sidebar and tab-bar UI changes, including hover behavior, empty states, refresh behavior, and tab switching.
Description check		The description includes a clear summary, testing results, changelog entry, and before-and-after visual proof. It omits the template checklist section, but the substantive testing and localization inf…

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[github-actions]

All contributors have signed the CLA ✍️ ✅
_{Posted by the CLA Assistant Lite bot.}

[github-actions]

Dogfood tours of 91e1d58a

cloud-sidebar-audit-tour at 91e1d58a: not run

skipped: CI left no app build for this head (its compile failed or was cancelled)

_{Tours are picked by the paths globs in dogfood/scenarios/*.json; a Dogfood-tours: a, b line in the description picks them instead (none turns this off). Look at every frame before merging: a green tour only means no step failed.}

[lucasr1b]

review (correctness-first subagent pass on the full diff before opening):

• fixed: hover could stay lit when the team chip left its window (the menu swallows the exit event). the chip now rechecks hover when the menu closes and clears it when it leaves the window. 91c8e5e, covered by CloudTeamPickerMenuTests.
• nothing else blocking. checked: the overlay still opens the team menu and keeps its tooltip, the chip stays lit while its menu is open like a native pull-down, the banner close button matches MachinesChromeIconButton's hover.

tested in a local tagged build against the dev backend (before/after above), CI green.

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Stale Bugbot comment from a previous run.

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Stale Bugbot comment from a previous run.

[github-actions]

CI fast guards failed on 91e1d58ab9 (https://github.com/manaflow-ai/cmux/actions/runs/38131773517). It does not block the merge; a red guard merged into main breaks it for every open PR.
The log named no failed step; see the run.

Agents: python3 scripts/ci/guard_attribution.py fix applies the mechanical fixes locally. This comment is updated in place on each push.

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Actionable comments posted: 1

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Inline comments:
Review comments at @cmuxTests/CloudTeamPickerMenuTests.swift:
- Line 235: Update the window-detach handling around setPointerInside(false) so
detaching synchronously clears the hover state before removeFromSuperview()
returns; remove the deferred reset that leaves hovers unchanged at the
immediate-detach assertion.

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• cmuxTests/CloudTeamPickerMenuTests.swift

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Cursor Bugbot has reviewed your changes using default effort and found 1 potential issue.

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Actionable comments posted: 1

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Inline comments:
Review comments at @Sources/Cloud/CloudTeamPickerMenuAnchor.swift:
- Around line 150-152: Update the hover-point calculation near
`window.mouseLocationOutsideOfEventStream` in the Cloud team picker to use that
window-coordinate point directly with `convert(_:from: nil)`, removing the
screen-to-window conversion. Update the `HoverWindow` test override to provide
window coordinates so the test reflects the corrected coordinate space.

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• Sources/Cloud/CloudTeamPickerMenuAnchor.swift
• cmuxTests/CloudTeamPickerMenuTests.swift

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[github-actions]

Probably yours: CloudTreeHeaderActionsTests.swift:371 fails here but not on main's latest full suite.

CI failed on 91e1d58ab9 (run 38131773517 attempt 3): 1 code.

Job	Verdict	Why
macos / app-host unit tests (changed suites)	code	a test failed

Failures:

• new in this PR CloudTreeHeaderActionsTests.swift:371 My Devices controls size to their rows, with no space kept for the removed ⋯ hint: Expectation failed: (fixture.coordinator.outlineView(tree.outline, heightOfRowByItem: controls) → 66.0) == (expected → 7... (job)

Matched log lines

macos / app-host unit tests (changed suites): ✘ Test "My Devices controls size to their rows, with no space kept for the removed ⋯ hint" recorded an issue with 2 arguments listedMacs → 0, section → CloudTreeDevicesSection(count: 0, discoveryEnabled: true, incomingAccessEnabled: false, discoveryManaged: false, incomingAccessManaged: false, avail

Not re-run automatically: macos / app-host unit tests (changed suites) is not a machine failure.

Written by scripts/ci/classify_failures.py (ci-failure-attribution.yml); signatures are its SIGNATURES table. A machine verdict is the runner's fault, not this PR's; yours means the failing file is one this PR changes, also red on main that main's latest full suite fails the same way, seen on other PRs that it failed on another pull request's run lately.

[austinywang]

Final-head review disposition for 2cbe04ead3db2d2c50c977bdbff292c4ccb3331c:

• Cursor’s stationary-pointer/tracking-area rebuild finding is fixed in dc6ab325318d and finalized through 5e718c94258, fe6a9db9b38, and 85a0e842915: the anchor re-reads the window pointer after every rebuild, ignores stale area events, and owns synchronous window detach/reattach reconciliation. The exact-head hosted run 38041719063 passed all 20 CloudTeamPickerMenuTests cases.
• CodeRabbit’s deferred RunLoop.main.perform lifecycle finding is fixed in 85a0e842915: viewWillMove(toWindow:) clears hover and removes the old area synchronously; reattachment reconciles immediately. The only remaining run-loop scheduling is the existing menu-presentation deferral, which prevents nested menu tracking from starving the main queue; it is not lifecycle hover repair.
• CodeRabbit’s coordinate-space finding is fixed in d3de1ca6421 and 5e718c94258: mouseLocationOutsideOfEventStream is passed directly as a window-coordinate point, and HoverWindow supplies that same coordinate space.
• The final correctness review also caught and fixed the hosted chip’s missing sidebar appearance environment in 06b07febaa0; unsupported colorSchemeContrast injection was removed in 2cbe04ead3d after the exact fleet compile. The chip preserves selection, menu invocation, disabled behavior, tooltip, accessibility through the underlying button, and menu-open highlighting; banner close hover remains on the existing shared styling path.

The actionable thread replies are tracking-area rebuild, detach/reattach timing, deferred lifecycle repair, coordinate-space review, and duplicate coordinate-space finding. Each is resolved after the cited fix and test evidence.

The required run was retried twice. Its hover suite and all compile/static/package checks pass, but the unchanged CloudWorkspaceCreationRevealTests.closingTheWindowDuringShortcutReleasesItsManager(entryPoint:) still fails at cmuxTests/CloudWorkspaceCreationRevealTests.swift:259 on all three attempts, so the required rollup remains externally blocked; no unrelated test code was changed.

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[github-actions]

Merge receipt for 91e1d58ab9, merged 2026-10-11 22:21:08 UTC

• Not verified at merge: app-host unit tests (failure), ci-status (failure), macOS status (failure)
• Verified: backend migrations applied, macOS compile admission, catalog-structure, CI fast guards, CI timing, detect-ios-changes, Fast static checks, GhosttyKit release check, guards (18), ios-tests, linux-preflight, macOS admission gate, and 5 more
• Skipped by policy: admission-placement, apply-production, apply-staging, browser, Claude wrapper regressions, CLI product tests, Dogfood build #​${{ github.event.pull_request.number }}, ios-simulator, ios-simulator-build, late-placement, mobile-core-package, release-admission, and 9 more
• Full suite: runs on main after merge.

Labeled merged-unverified: if main breaks near this merge, look here first.