feat(h5): align third feedback with latest PSD and scanning screen

tools/export_psd_assets.py

@@ -19,18 +19,18 @@ ASSETS = ROOT / "h5/assets/img/ui-20261009"
 ASSET_SPECS = [
     ("bg-splash.jpg", "0/0", "0"),
     ("bg-profile.jpg", "3/0/0", "3"),
-    ("bg-login.jpg", "9/0/0", "9"),
+    ("bg-login.jpg", "login/0/0", "login"),
     ("bg-report.jpg", "8/0", "8"),
     ("bg-history.jpg", "2/0", "2"),
     ("brand-logo.png", "0/1/0", None),
-    ("brand-login.png", "9/7/1", None),
+    ("brand-login.png", "login/7/1", None),
     ("icon-close.png", "1/6", None),
     ("icon-dropdown.png", "3/1/2", None),
     ("icon-back.png", "3/6/0", None),
     ("icon-album.png", "5/1/1", None),
     ("icon-switch-camera.png", "5/1/0", None),
-    ("icon-wechat.png", "9/7/6", None),
-    ("icon-guest.png", "9/7/7", None),
+    ("icon-wechat.png", "login/7/6", None),
+    ("icon-guest.png", "login/7/7", None),
     ("icon-shutter.png", "5/1/2", None),
     ("skin-0-dry.png", "3/3/1/0/2", None),
     ("skin-1-mixeddry.png", "3/3/1/1/2", None),
@@ -59,7 +59,13 @@ ASSET_SPECS = [
 def layer_at(psd, indices):
     layer = psd
     for part in indices.split("/"):
-        layer = layer[int(part)]
+        if part == "login":
+            matches = [page for page in psd if page.name == "登录"]
+            if len(matches) != 1:
+                raise ValueError("Expected exactly one 登录 page; refusing incorrect asset mapping")
+            layer = matches[0]
+        else:
+            layer = layer[int(part)]
     return layer
 
 
@@ -111,7 +117,7 @@ def main():
         print(f"Page {index}: {page.name}", flush=True)
         # Cached layer pixels preserve Photoshop text appearance without local fonts.
         target = DESIGN / "pages" / f"{index + 1:02d}-{page.name}.png"
-        if args.assets_only:
+        if args.assets_only and target.exists():
             image = Image.open(target)
         else:
             image = page.composite(viewport=page.bbox)
@@ -160,7 +166,7 @@ def main():
         thumb.thumbnail((180, 190))
         thumbs.append((filename, thumb))
 
-    sheet = Image.new("RGB", (5 * 236, 2 * 1620), "#eeeeee")
+    sheet = Image.new("RGB", (5 * 236, ((len(previews)+4)//5) * 1620), "#eeeeee")
     draw = ImageDraw.Draw(sheet)
     for i, (_, preview) in enumerate(previews):
         x, y = (i % 5) * 236 + 10, (i // 5) * 1620 + 35