#17692 cmux-next: Feed kinds, inbox controls and GitHub actions draw registry icons

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 a1b1873daac 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 (96f7421369d) and the fix (ba711434f18), 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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Summary by cubic

The Feed now draws item kind glyphs, inbox controls, and GitHub actions icons from the cmux icon registry instead of SF Symbols, with one semantic name per meaning at the row size of the text beside them.

• Kind glyphs use registry names like .integration, .machineRemote, .automation, and .terminal; the glyph box is iconRowSize of the text size.
• Converted inbox header controls (connection tabs, add, search, filter, refresh), toast close, empty states, menubar, approve scope, snooze, GitHub actions, answer controls, and prompt summary icons.
• Menu labels (filter, scope, snooze) draw template NSImages because AppKit keeps images but drops canvas-backed views.
• Empty-state trays are sized so the pack's ink matches the SF Symbols they replaced.
• FeedIconLabel is a new reusable label; FeedRegistryIconTests cover the glyph-to-icon mapping and row sizing.