* studio/tests: make Playwright model-selector probe best-effort
The Mac Studio UI CI run 25664825320 / job 75334476211 failed at
playwright_chat_ui.py:483 with:
playwright._impl._errors.TimeoutError:
Locator.text_content: Timeout 60000ms exceeded.
Timeline from that job's log:
11:40:51 [ui] OK default_models[0] = unsloth/gemma-4-E2B-it-GGUF
11:41:51 TimeoutError (exactly 60 s later)
Root cause: count() and text_content() are two independent queries
against the live DOM. The chat surface re-mounts the model selector
while /api/models/list resolves the default-model badge, so the
button matches the OR-selector at count() time but is briefly
detached when text_content() re-queries. The page-wide default
action timeout was bumped to 60 s on line 177, so the informational
probe blocked for a full minute and then hard-failed.
The block is clearly best-effort: it is gated on if count() > 0 and
the only side effects are info(...) and shoot(...). Replace the
count-then-text dance with a single text_content(timeout=2_000)
inside a try/except, matching the pattern the rest of this file
already uses for networkidle, screenshot capture, and composer
wait. Happy path still prints the button text and snaps
03b-default-model-button; a miss now logs WARN and continues to the
/api/inference/load step.
* [pre-commit.ci] auto fixes from pre-commit.com hooks
for more information, see https://pre-commit.ci
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