Task 01: Compact shared profile warning

Acceptance

A profile whose saved start model is absent from the known host catalog remains selectable and renders one focusable/hoverable amber warning icon without nesting an interactive control in the selected combobox trigger.
The existing localized host-probe sentence is absent from the persistent option row and appears in a fine-pointer tooltip or coarse-pointer drawer when the warning icon is inspected.
The create-task desktop and mobile flows retain the warning behavior, profile selectability, and mobile no-horizontal-overflow guarantee.

Verification

From a fresh worktree, first run:

cd apps && pnpm install --frozen-lockfile

Then run the focused checks:

cd apps/web && pnpm vitest run components/task-create-dialog-options.test.tsx
cd apps/web && pnpm run typecheck
cd apps/web && pnpm run i18n:ratchet
cd apps/web && pnpm e2e:run --project chromium tests/settings/no-silent-model-fallback.spec.ts
cd apps/web && pnpm e2e:run --project mobile-chrome tests/settings/mobile-no-silent-model-fallback.spec.ts

Files likely touched

apps/web/components/task-create-dialog-options.tsx
apps/web/components/combobox.tsx
apps/web/components/task-create-dialog-options.test.tsx
apps/web/e2e/tests/settings/no-silent-model-fallback.spec.ts
apps/web/e2e/tests/settings/mobile-no-silent-model-fallback.spec.ts

Dependencies

None.

Parallelism

Sequential. The unit and E2E assertions share the warning trigger contract.

Inputs

docs/specs/agents/requirements/no-silent-model-fallback.md, section 8 and frontend test requirements.
docs/decisions/2026-08-15-executor-authoritative-model-selection.md, which keeps the host probe advisory and the executor authoritative.
apps/web/AGENTS.md, especially tooltip, i18n, and mobile guidance.
Existing Combobox disabled-option tooltip pattern in apps/web/components/combobox.tsx.

Risks

The warning trigger is nested inside a command option. Keep focus and pointer handling from accidentally selecting or dismissing the profile option while the user inspects the message.
Radix tooltip content is portalled. E2E selectors must target the visible tooltip content, not a hidden or stale portal instance.

Output contract

Report the summary, actual files changed, exact commands and results, any mobile-rendered verification, blockers, and synchronized task/plan status.

Results

Implemented the compact warning trigger in the shared agent-profile option renderer. The warning remains selectable, has an accessible focusable trigger, opens in a fine-pointer tooltip or coarse-pointer Drawer, and uses a noninteractive indicator in the selected combobox trigger. The advisory sentence is no longer persistent option content.

Verification:

cd apps && pnpm install --frozen-lockfile — passed.
cd apps/web && pnpm vitest run components/task-create-dialog-options.test.tsx — passed, 17 tests.
cd apps/web && pnpm exec eslint components/combobox.tsx components/task-create-dialog-options.tsx components/task-create-dialog-options.test.tsx e2e/tests/settings/no-silent-model-fallback.spec.ts e2e/tests/settings/mobile-no-silent-model-fallback.spec.ts — passed.
cd apps/web && pnpm run typecheck — passed.
cd apps/web && pnpm run i18n:ratchet — passed, zero new or modified violations.
cd apps/web && pnpm e2e:run --project chromium tests/settings/no-silent-model-fallback.spec.ts — passed, 1 test.
cd apps/web && pnpm e2e:run --project mobile-chrome tests/settings/mobile-no-silent-model-fallback.spec.ts — passed, 1 test.
git diff --check — passed.
Fresh synthetic desktop and mobile screenshots were captured, inspected, and compressed for the PR description.
Review remediation completed: the selected trigger no longer nests an interactive warning button, and coarse-pointer inspection uses the shared Drawer pattern.

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