cmux-next: Feed kinds, inbox controls and GitHub actions draw registry icons

[azooz2003-bit]

Summary

Seventh PR of the icon registry lane (after #17538, #17558, #17582, #17583, #17593 and #17597). The Feed showed each item's kind with SF Symbols at the font size of its text, plus SF labels on GitHub actions, prompt summaries and the inbox header. The Feed now draws them from the cmux icon registry, with one semantic name per meaning, at the row size of the text beside them. Because of #17597, they land on whole pixels.

Kind glyphs (FeedGlyph.icon(for:)):

Item	Was (SF)	Now (registry)
Notice from an integration	arrow.triangle.pull	integration
Notice from a server or VM	server.rack	machine.remote
Notice from an automation	gearshape.2	automation
System notice with a terminal	terminal	terminal
Other notices	bell	notification
Approve: command	terminal	terminal
Approve: edit	pencil.line	action.edit
Approve: network	network	network
Approve: install	shippingbox	package
Approve: tool or custom	wrench.and.screwdriver	tools
Question	text.bubble	agent.question
Choice	list.bullet	feed.choice
Confirm	checkmark.circle	action.confirm
Sign in	person.badge.key	account.signin
Passkey	person.badge.key.fill	account.passkey
Review	doc.text.magnifyingglass	action.review
Input	rectangle.and.pencil.and.ellipsis	feed.input
File	doc.badge.plus	file.new
Handoff	hand.raised	agent.handoff
Custom	square.grid.2x2	feed.custom

The glyph box is iconRowSize(textSize) (11 → 13, 12 → 14, 15 → 18). The frame stays size + 6.

Other converted call sites:

Surface	Was (SF)	Now (registry)
PosterLine this-Mac mark	laptopcomputer	machine.local
FeedInboxHeader connection tabs	arrow.triangle.pull, tray	brand.github, inbox
FeedInboxHeader add connection	plus	action.add
FeedInboxHeader search	magnifyingglass	search
FeedInboxHeader filter menu	line.3.horizontal.decrease, .circle.fill when filtered	filter, Line or Solid when filtered
FeedInboxHeader refresh	arrow.clockwise	action.reload
FeedToast close	xmark 9 pt	action.close at iconFloor
FeedEmptyState, inbox placeholder	tray	inbox.empty
FeedMenubarView open Feed	arrow.up.forward.app	app.open.external
FeedApproveControls scope menu	chevron.up.chevron.down 8 pt	control.popup at iconFloor
FeedInboxView snooze menu	moon.zzz	action.snooze
FeedGitHubActions branch, checks, error	arrow.triangle.branch, checkmark.circle/xmark.circle, exclamationmark.triangle	git.branch, status.success/status.error, status.warning
FeedGitHubActions buttons	arrow.up.right, arrow.down.to.line, sparkles, checkmark, exclamationmark.bubble	link.external, git.branch, agent.chat.new, action.confirm, action.review
FeedAnswerControls closed line	checkmark, minus.circle	status.success, action.remove
FeedPromptSummary checklist, origin, attachment	circle, lock, doc.text	list.bullet.item, security.lock, file.text

Menu labels (filter, scope, snooze) draw NSImage.icon template images rather than the canvas-backed Icon. AppKit renders menu labels and keeps images but drops custom views, so a canvas could leave the control blank.

Not converted: mark-all-read keeps checkmark.circle. action.confirm means approve, and the pack has no mark-read icon yet. FeedTunables.section keeps its symbol string because TunableSection takes one.

Testing

Red commit a1b1873 adds FeedRegistryIconTests; the fix follows. The red run failed to compile on base (FeedGlyph has no member icon or side).

• Approve-command, integration, system and server items name terminal, integration, notification and machine.remote.
• A glyph's box is iconRowSize of its text size.

scripts/verify-local.py --affected: feature-flags passed; package-groups fails on base's cmux.xcworkspace grouping, as on earlier PRs in this lane.

Changelog

Changed: Feed items, inbox controls and GitHub actions use the cmux icon set at the size of their text

Demo Video

Fleet builds of base (96f7421) and the fix (ba71143), on a capture mini (1x display), with the Feed opened from the Window menu. The mini has no Feed items, so the captures show the header and the empty state. The two runs came up in different appearances (light before, dark after).

Before	After

Empty-state tray at 8x (before left, after right):

The first after build drew the tray at a 20 pt box. A pack drawing inks about two thirds of its box, so the tray was 14 px wide against the SF tray's 23. The empty states now use 32 and 44 pt boxes, and the tray inks 24 px wide.

Checklist

• Behavior changes have added or updated tests, or Testing says why not
• UI change with no new or changed user-facing strings; localization not affected

🤖 Generated with Claude Code

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Migrated from #17620 after correcting the PR author identity. The original head commit f443cc9 is preserved.

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Summary by cubic

Feed items, inbox controls, and GitHub actions now draw their icons from the cmux registry instead of SF Symbols, with one semantic icon per meaning at the row size of the text beside them. CmuxNextFeed adds a CmuxNextIcons dependency, and new tests verify the mappings and glyph sizing.

• Menu labels (filter, scope, snooze) render template NSImages since AppKit drops custom SwiftUI icon canvases in menus.
• Empty-state trays use 32 and 44 pt boxes because registry packs ink about two thirds of their box, keeping them visually equal to the 20 and 27 pt SF Symbols they replaced.
• Mark-all-read and FeedTunables.section keep their SF symbols because the registry lacks matching icons and TunableSection takes a symbol string.

^{Written for commit f443cc9. Summary will update on new commits.}

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[github-actions]

Not verified: macOS jobs did not run: compile and app tests were skipped on f443cc97bd; ci-status is green without them.

CI passes on f443cc97bd (run 37527110135 attempt 1).
macOS jobs did not run: compile and app tests were skipped: Fast static checks skipped (the macos job needs both to succeed). Re-run CI once they pass, before merging.

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.