fix: switch gemini preset to inpaint strategy

unmark/presets.py

@@ -10,16 +10,19 @@
 
 
 def gemini(img: np.ndarray) -> np.ndarray:
-    """Google Gemini puts a small light sparkle in the bottom-right corner on the
-    generated image's background. Mirror-patch from bottom-left works cleanly when
-    the background is near-uniform (typical for portrait avatars)."""
+    """Google Gemini stamps a bright diamond/sparkle in the bottom-right corner on every
+    generated image. Inpaint detects the bright pixels and fills from immediate
+    neighbors, so whatever content sits behind the sparkle (fog, gradient, sky,
+    vignette) is preserved instead of being replaced with content from the opposite
+    corner. Works on both uniform and non-uniform backgrounds."""
     return remove_watermark(
         img,
-        strategy="mirror",
+        strategy="inpaint",
         corner="bottom-right",
-        patch_ratio=0.22,
-        full_radius_ratio=0.42,
-        fade_radius_ratio=0.78,
+        region_ratio=0.20,
+        brightness_threshold=200,
+        dilate_iters=4,
+        inpaint_radius=12,
     )