fix: align e2e quality model with runtime default

tests/e2e_quality.py

@@ -34,6 +34,8 @@ from playwright.sync_api import Page, sync_playwright
 
 sys.path.insert(0, str(Path(__file__).parent.parent))
 
+from llm_config import DEFAULT_LLM_MODEL
+
 # ---------------------------------------------------------------------------
 # Setup
 # ---------------------------------------------------------------------------
@@ -68,7 +70,7 @@ RUN_SETTINGS = {
     "object_prefix":      "tst",
     "share_with":         "mike.boone@thoughtspot.com",
     "geo_scope":          "USA Only",
-    "ai_model":           "gpt-5.5",                   # DEFAULT_LLM_MODEL — change to test other LLMs
+    "ai_model":           DEFAULT_LLM_MODEL,           # Follow app runtime default/temporary failover
     "ts_environment":     "secloud - primary",          # change to test other TS instances
 }
 
@@ -236,9 +238,23 @@ def build_test_suite(config: dict) -> list:
 def select_gradio_dropdown(page: Page, label: str, value: str):
     """Select a value from a Gradio dropdown using aria-label (confirmed from DOM inspection)."""
     inp = page.locator(f'input[aria-label="{label}"]').first
+    try:
+        current_value = (inp.input_value(timeout=1000) or "").strip()
+        if current_value == value:
+            return
+    except Exception:
+        pass
     inp.click(timeout=5000)
     page.wait_for_timeout(300)
-    page.get_by_role('option', name=value, exact=True).click(timeout=5000)
+    option = page.get_by_role('option', name=value, exact=True)
+    try:
+        option.click(timeout=5000)
+    except Exception as e:
+        visible_options = page.locator('[role="option"]').all_inner_texts()
+        raise RuntimeError(
+            f"Dropdown {label!r} does not contain {value!r}. "
+            f"Visible options: {visible_options}"
+        ) from e
     page.wait_for_timeout(300)