fix(iace): confirmation dialog for ungrouping + undo/regroup

- X button replaced with confirmation dialog: "Als eigenen Punkt fuehren" / "Abbrechen"
- Dialog explains the action and that it's reversible
- Ungrouped items show orange "Zurueck in Block" button
- Info bar shows count of ungrouped items + "alle zuruecksetzen" link
- No destructive action without user confirmation

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

consent-tester/services/banner_detector.py

@@ -467,15 +467,36 @@ async def click_button(page: Page, selector: str, timeout: int = 5000) -> bool:
         text_pattern = selector[len("shadow-click:"):]
         return await _click_in_shadow_dom(page, text_pattern)
 
+    # 1. Try main document
     try:
         locator = page.locator(selector).first
         await locator.wait_for(state="visible", timeout=timeout)
         await locator.click()
         return True
     except Exception:
-        # Fallback: try Shadow DOM click with selector text
-        # Extract button text from selector like 'button:has-text("Accept all")'
-        if ':has-text("' in selector:
-            text = selector.split(':has-text("')[1].rstrip('")')
-            return await _click_in_shadow_dom(page, text)
-        return False
+        pass
+
+    # 2. Fallback: try inside iframes (Sourcepoint, Quantcast, etc.)
+    try:
+        for iframe_sel in [
+            "iframe[id^='sp_message']",  # Sourcepoint
+            "iframe[id*='consent']",
+            "iframe[title*='SP Consent']",
+            "iframe[title*='consent']",
+        ]:
+            try:
+                frame = page.frame_locator(iframe_sel)
+                btn = frame.locator(selector).first
+                if await btn.count() > 0:
+                    await btn.click(timeout=timeout)
+                    return True
+            except Exception:
+                continue
+    except Exception:
+        pass
+
+    # 3. Fallback: Shadow DOM
+    if ':has-text("' in selector:
+        text = selector.split(':has-text("')[1].rstrip('")')
+        return await _click_in_shadow_dom(page, text)
+    return False