feat: add functional plugin icons

plugins/cjysa-spreadsheets/.codex-plugin/plugin.json

@@ -20,6 +20,8 @@
     "capabilities": ["Interactive", "Read", "Write"],
     "websiteURL": "https://git.cjysa.top/CJYSA/codex-free-market",
     "brandColor": "#107C41",
+    "composerIcon": "./assets/icon.png",
+    "logo": "./assets/logo.png",
     "defaultPrompt": [
       "把这份 CSV 整理成带公式和格式的 Excel。",
       "分析这个工作簿并解释关键指标。",

plugins/cjysa-spreadsheets/assets/icon.svg

@@ -0,0 +1,7 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512">
+  <rect width="512" height="512" rx="112" fill="#107C41"/>
+  <rect x="112" y="106" width="288" height="300" rx="20" fill="#fff"/>
+  <rect x="144" y="164" width="224" height="198" fill="#DCFCE7"/>
+  <path d="M144 230h224M144 296h224M218 164v198M292 164v198" stroke="#107C41" stroke-width="18"/>
+  <path d="M144 132h224" stroke="#86EFAC" stroke-width="26"/>
+</svg>