fix: render asset tabs as ratio-preserving grid

src/app/globals.css

@@ -785,28 +785,19 @@ input, textarea {
 }
 
 .asset-strip {
-  display: flex;
+  display: grid;
+  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
+  align-items: start;
   gap: 12px;
-  overflow-x: auto;
+  overflow-x: visible;
   overflow-y: visible;
-  padding-bottom: 4px;
-  scroll-snap-type: x proximity;
-  scrollbar-width: thin;
-  scrollbar-color: rgba(255,255,255,0.18) transparent;
-}
-
-.asset-strip::-webkit-scrollbar {
-  height: 8px;
-}
-
-.asset-strip::-webkit-scrollbar-thumb {
-  border-radius: 999px;
-  background: rgba(255,255,255,0.16);
 }
 
 .asset-tile {
-  flex: 0 0 clamp(136px, 12vw, 172px);
-  scroll-snap-align: start;
+  display: flex;
+  min-width: 0;
+  height: 100%;
+  flex-direction: column;
   border-radius: 8px;
   background: rgba(255,255,255,0.035);
   box-shadow: inset 0 0 0 1px rgba(255,255,255,0.07);
@@ -820,7 +811,6 @@ input, textarea {
   box-shadow:
     inset 0 0 0 1px rgba(230,245,120,0.22),
     0 18px 50px -34px rgba(230,245,120,0.55);
-  transform: translateY(-1px);
 }
 
 .asset-tile:focus-visible {
@@ -831,7 +821,6 @@ input, textarea {
 .asset-tile__thumb {
   position: relative;
   display: grid;
-  height: 118px;
   width: 100%;
   place-items: center;
   overflow: visible;
@@ -841,7 +830,9 @@ input, textarea {
 }
 
 .asset-tile__thumb > img {
-  max-height: 118px;
+  display: block;
+  width: 100%;
+  height: 100%;
 }
 
 .asset-tile__state {
@@ -867,7 +858,10 @@ input, textarea {
 }
 
 .asset-tile__body {
+  display: flex;
   min-width: 0;
+  flex: 1;
+  flex-direction: column;
   padding-top: 9px;
 }
 
@@ -1074,8 +1068,8 @@ input, textarea {
     display: none;
   }
 
-  .asset-tile {
-    flex-basis: 142px;
+  .asset-strip {
+    grid-template-columns: repeat(auto-fill, minmax(136px, 1fr));
   }
 
   .asset-detail-drawer {

src/components/PackPanel.tsx

@@ -82,7 +82,7 @@ function AssetTile({ template, asset, onOpen }: {
           {template.required && <span className="shrink-0 text-[9px] text-[#e6f578]/75">必备</span>}
         </div>
         <p className="mt-1 line-clamp-2 text-left text-[10px] leading-relaxed text-white/42">{template.description}</p>
-        <div className="mt-2 flex items-center justify-between gap-2">
+        <div className="mt-auto flex items-center justify-between gap-2 pt-2">
           <span className="font-mono text-[9px] text-white/34">{ASPECT_PX[template.aspectRatio]}</span>
           <span className={`font-mono text-[10px] ${ready ? 'text-[#dff5a8]' : 'text-white/28'}`}>
             {ready ? `L${asset!.derivationLevel}` : 'EMPTY'}