chore: remove ServiceLink integration

- Drop the ServiceLink submodule, link-serve command, and serve --rpc mode.
- Remove the now-unused httpx dependency and regenerate uv.lock.
- Add a privacy policy for Chrome Web Store publication.
- Refresh extension icons and bump package/extension version to 0.14.2.
- Keep the native TCP serve path as the only remote-control endpoint.

extension/icon.svg

@@ -1,28 +1,31 @@
 <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 128 128" role="img" aria-labelledby="title">
   <title>browser-cli icon</title>
   <defs>
-    <linearGradient id="bg" x1="12" y1="10" x2="116" y2="118" gradientUnits="userSpaceOnUse">
+    <linearGradient id="bg" x1="16" y1="16" x2="112" y2="112" gradientUnits="userSpaceOnUse">
       <stop offset="0" stop-color="#0f766e" />
       <stop offset="1" stop-color="#0f172a" />
     </linearGradient>
-    <linearGradient id="panel" x1="28" y1="24" x2="100" y2="104" gradientUnits="userSpaceOnUse">
+    <linearGradient id="panel" x1="32" y1="29" x2="96" y2="99" gradientUnits="userSpaceOnUse">
       <stop offset="0" stop-color="#f8fafc" />
       <stop offset="1" stop-color="#cbd5e1" />
     </linearGradient>
   </defs>
 
-  <rect x="8" y="8" width="112" height="112" rx="28" fill="url(#bg)" />
-  <rect x="25" y="25" width="78" height="66" rx="14" fill="url(#panel)" />
-  <rect x="25" y="25" width="78" height="15" rx="14" fill="#94a3b8" />
-  <circle cx="36" cy="32.5" r="2.5" fill="#f8fafc" />
-  <circle cx="44" cy="32.5" r="2.5" fill="#f8fafc" opacity="0.85" />
-  <circle cx="52" cy="32.5" r="2.5" fill="#f8fafc" opacity="0.7" />
+  <!-- Chrome Web Store compliant: 96x96 artwork centered in 128x128 canvas. -->
+  <rect x="16" y="16" width="96" height="96" rx="24" fill="url(#bg)" />
+  <rect x="17" y="17" width="94" height="94" rx="23" fill="none" stroke="#ccfbf1" stroke-opacity="0.55" stroke-width="2" />
 
-  <path d="M46 56 35 64l11 8" fill="none" stroke="#0f172a" stroke-linecap="round" stroke-linejoin="round" stroke-width="8" />
-  <path d="M62 52h19" fill="none" stroke="#0f766e" stroke-linecap="round" stroke-width="8" />
-  <path d="M62 65h26" fill="none" stroke="#0f766e" stroke-linecap="round" stroke-width="8" />
+  <rect x="32" y="31" width="64" height="54" rx="11" fill="url(#panel)" />
+  <path d="M32 42c0-6.075 4.925-11 11-11h42c6.075 0 11 4.925 11 11v3H32z" fill="#94a3b8" />
+  <circle cx="42" cy="38.5" r="2.2" fill="#f8fafc" />
+  <circle cx="49" cy="38.5" r="2.2" fill="#f8fafc" opacity="0.85" />
+  <circle cx="56" cy="38.5" r="2.2" fill="#f8fafc" opacity="0.7" />
 
-  <rect x="69" y="77" width="26" height="17" rx="6" fill="#14b8a6" />
-  <rect x="56" y="84" width="26" height="17" rx="6" fill="#2dd4bf" />
-  <rect x="43" y="91" width="26" height="17" rx="6" fill="#99f6e4" />
+  <path d="M49 57 40 64l9 7" fill="none" stroke="#0f172a" stroke-linecap="round" stroke-linejoin="round" stroke-width="7" />
+  <path d="M62 55h17" fill="none" stroke="#0f766e" stroke-linecap="round" stroke-width="7" />
+  <path d="M62 67h23" fill="none" stroke="#0f766e" stroke-linecap="round" stroke-width="7" />
+
+  <rect x="70" y="78" width="22" height="15" rx="5" fill="#14b8a6" />
+  <rect x="59" y="84" width="22" height="15" rx="5" fill="#2dd4bf" />
+  <rect x="48" y="90" width="22" height="15" rx="5" fill="#99f6e4" />
 </svg>