[Bug]: Mobile composer doesn't show which account a thread uses (web shows the account badge)

[vitalyiegorov]

Before submitting

• I searched existing issues and did not find a duplicate.
• I included enough detail to reproduce or investigate the problem.

Area

apps/mobile

Steps to reproduce

1. Set up two accounts of one provider, for example two Claude instances named "Personal" and "Work".
2. Open a thread on the Work account on web and on mobile.
3. Compare the model control in the composer.

Expected behavior

The mobile composer shows the account badge (WO) next to the model, as web does. That's how you can tell which account the next message will use.

Actual behavior

Mobile shows only the bare provider glyph, so the same thread looks identical on Personal and on Work. You only find out which account it uses by opening the model sheet. Same thread, same moment:

Web:

Mobile (iOS 26.5 simulator):

Cause

ThreadComposer.tsx (renderIcon) draws the plain ProviderIcon. Mobile already has the shared ProviderInstanceIcon and the shouldShowInstanceBadge rule, which the thread rows use since #9898 → #9899.

The other mobile places that pick or show a thread's account have the same gap: the new-task draft (NewTaskDraftScreen.tsx), the thread settings sheet (ThreadSettingsSheet.tsx), and subagent rows (SubagentRow.tsx, thread-subagent-group.tsx). On web, each of these has the badge.

Impact

Minor bug or occasional failure

Version or commit

main at a1d9d72

Environment

iOS 26.5 simulator (iPhone 17) and web, against one Linux host with two Claude accounts.

Workaround

Open the model sheet and read the instance name.

Related

• [Bug]: Mobile thread rows hide the provider account badge the web sidebar shows #9898 / fix(mobile): show the provider account badge on thread rows #9899: mobile thread rows got the badge.
• [Bug]: Switching accounts mid-thread shows the handoff as "Claude Opus 5.5 → Claude Opus 5.5" #15476 / fix(clients): handoffs between accounts show which account is on each side #15477: the context handoff divider.
• fix(mobile): account badges no longer clip wide initials like WO #15908: wide initials such as WO no longer clip in the mobile badge.

[juliusmarminge]

Note

Grok responding on behalf of Julius.

Triage

Thanks for the thorough surface-by-surface table, @vitalyiegorov!

What I found

• On current main (unchanged since a1d9d72), the composer, model sheet, and subagent bar still render ProviderIcon. This is separate from [Bug]: Switching accounts mid-thread shows the handoff as "Claude Opus 5.5 → Claude Opus 5.5" #15476/fix(clients): handoffs between accounts show which account is on each side #15477 and from fix(mobile): account badges no longer clip wide initials like WO #15908.
• Composer: ThreadComposer and NewTaskDraftScreen pass ProviderIcon into the model control, and the label is the model name, so two Claude accounts look identical. Web's ProviderModelPicker uses ProviderInstanceIcon with shouldShowInstanceBadge.
• Subagent bar: mobile ProviderSubagentBar only receives { driver, iconUrl }. Web's bar gets the instance entry and showInstanceBadge from ChatView.
• Model sheet header: ThreadSettingsSheet is a bare glyph, and providerDisplayLabel in apps/mobile/src/lib/modelOptions.ts returns displayName whenever it's set, so two instances named "Claude" stay indistinguishable. Web's ModelPickerSidebar badges and names the instance with resolveProviderInstanceDisplayName.
• A few of the cited spots follow a different treatment on web too:
  • SubagentRow already prefixes resolveProviderInstanceDisplayName. Web's subagent tooltip adds the account name when shouldShowInstanceBadge is true.
  • Web's SubagentAvatar (V2LifecycleRow.tsx) is also a bare glyph, like mobile's in thread-subagent-group.tsx.
  • The web environment provider list only badges when an accent color is set (ProviderInstanceCard, showBadge={Boolean(accentColor)}). Mobile's SettingsEnvironmentDetailRouteScreen never badges.
• ProviderInstanceIcon draws the glyph at 60% opacity even when showBadge is false, which is worth keeping in mind when swapping it in.

Likely fix area

• Switching the composer, new-task draft, model sheet header, and subagent bar to ProviderInstanceIcon with shouldShowInstanceBadge, and passing the instance entry into mobile ProviderSubagentBar.
• Optionally using resolveProviderInstanceDisplayName for the model sheet header to match web.
• Whether the subagent avatar and environment list should match web's narrower rules or badge everywhere is a separate choice. fix(mobile): account badges no longer clip wide initials like WO #15908's layout fix would carry over automatically once these use the shared component.

A maintainer will decide on the fix direction.

[vitalyiegorov]

PR opened: #15922. The composer and new-task draft draw the account badge using the shared shouldShowInstanceBadge rule and ProviderInstanceIcon. Before and after screenshots of the same thread are in the PR.