add: add extension icons to manifest and adjust SidePanelShell width

Author: starwingChen

assets/icon.png

@@ -3,6 +3,12 @@
   "name": "EasyChat",
   "description": "Compare multiple AI assistants in one Chrome side panel.",
   "version": "1.0.0",
+  "icons": {
+    "16": "icon.png",
+    "32": "icon.png",
+    "48": "icon.png",
+    "128": "icon.png"
+  },
   "permissions": [
     "sidePanel",
     "storage",
@@ -35,7 +41,13 @@
     "type": "module"
   },
   "action": {
-    "default_title": "Open EasyChat"
+    "default_title": "Open EasyChat",
+    "default_icon": {
+      "16": "icon.png",
+      "32": "icon.png",
+      "48": "icon.png",
+      "128": "icon.png"
+    }
   },
   "side_panel": {
     "default_path": "index.html"

public/icon.png

@@ -81,7 +81,7 @@ export function SidePanelShell() {
         />
       ) : (
         <>
-          <aside className="flex w-14 shrink-0 flex-col overflow-x-hidden border-r border-slate-200 bg-slate-50/80 py-4">
+          <aside className="flex w-[57px] shrink-0 flex-col overflow-x-hidden border-r border-slate-200 bg-slate-50/80 py-4">
             <div className="flex min-h-0 flex-1 flex-col px-2">
               <div className="flex flex-col items-center gap-2">
                 <CollapsedSidebarItem