* test(e2e): cover add-fallback flow in Router Settings as proxy admin
The Router Settings → Fallbacks → Add Fallbacks flow was an uncovered
manual-QA path. This adds a test that opens the modal, picks a primary
+ fallback from the seeded mock models, saves, and verifies both render
in the fallback table.
* fix(e2e): make router-fallback test idempotent and pick antd options by text
- Match `.ant-select-item-option` by text instead of `getByTitle(...)` —
FallbackGroupConfig uses `options=` (not <Select.Option> children), so
no `title` attribute is emitted and the title-based selector hangs.
- Add before/after hooks that wipe any fallback for fake-openai-gpt-4 via
/config/update so retries and local reruns don't trip on leftover state.
- Tighten the success assertion to a single tbody row containing BOTH the
primary and the fallback names — pre-existing rows can no longer
vacuously satisfy the check.
- Fix the stale "Three tabs" comment to "Four tabs".
Addresses Greptile P2s on PR #29069.
* fix(e2e): keyboard-select fallback models + correct cleanup endpoint
- Replace mouse-based option clicks with click-to-focus + type + Enter.
FallbackGroupConfig's Selects use `options=` and a custom
getPopupContainer, so locating options via `.ant-select-dropdown`
hit several races: DOM-clicks left antd's popup state stale (the
primary popup then intercepted the fallback click), `getByRole`
matched always-mounted hidden options, and pointer stability fought
the open animation. Typing into the showSearch input narrows the
listbox to one option and Enter selects it cleanly.
- Assert on dialog-side state changes (the active tab adopts the
primary model name; the chain helper shows "1/10 used") instead of
popup contents — these reflect the actual selection landing.
- Cleanup helper now hits /get/config/callbacks (the real endpoint;
/get/callbacks returns 404), so the before/after reset actually
clears prior router_settings.fallbacks state.
b0ea013042