style(icons): apply reviewed icon set

assets/icons/paste.svg

@@ -1,16 +1,6 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24">
-  <!-- Clipboard board -->
-  <rect x="3" y="6" width="14" height="16" rx="1"
-        fill="#455A64" stroke="#78909C" stroke-width="1"/>
-  <!-- Clip at top -->
-  <rect x="7" y="4" width="6" height="4" rx="1"
-        fill="#546E7A" stroke="#78909C" stroke-width="0.8"/>
-  <!-- Content lines -->
-  <line x1="6" y1="12" x2="14" y2="12" stroke="#90A4AE" stroke-width="1"/>
-  <line x1="6" y1="15" x2="14" y2="15" stroke="#90A4AE" stroke-width="1"/>
-  <line x1="6" y1="18" x2="11" y2="18" stroke="#90A4AE" stroke-width="1"/>
-  <!-- Arrow pointing down-left into clipboard -->
-  <polyline points="19,3 19,11 15,11" fill="none"
-            stroke="#FFD740" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"/>
-  <polygon points="12,11 16,9 16,13" fill="#FFD740"/>
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" role="img" aria-label="Paste">
+  <rect x="5" y="5" width="14" height="16" rx="1" stroke="#B4B6B9" stroke-width="1.625" stroke-linecap="round" stroke-linejoin="round" fill="none"/>
+  <rect x="8" y="3" width="8" height="5" rx="1" stroke="#6DB7ED" stroke-width="1.625" stroke-linecap="round" stroke-linejoin="round" fill="none"/>
+  <line x1="8" y1="11" x2="16" y2="11" stroke="#B4B6B9" stroke-width="1.625" stroke-linecap="round" stroke-linejoin="round" fill="none"/>
+  <line x1="8" y1="15" x2="14" y2="15" stroke="#B4B6B9" stroke-width="1.625" stroke-linecap="round" stroke-linejoin="round" fill="none"/>
 </svg>