feat: 详情页复制按钮改用 fa-copy 图标

以内联 SVG 内嵌 Font Awesome copy/check 字形（viewBox 0 0 448 512），复制成功后切换为对勾；不再为单个图标引入整个 Font Awesome 依赖。

src/views/ProjectView.vue

@@ -92,7 +92,19 @@ watch(() => route.params.name, load, { immediate: true })
           <p class="banner-summary">{{ project.PackageDesc || t.project.noDesc }}</p>
           <div class="install">
             <code class="install-cmd">{{ installCommand }}</code>
-            <button class="copy" @click="copyInstall">{{ copied ? 'OK' : 'COPY' }}</button>
+            <button class="copy" :title="copied ? 'Copied' : 'Copy'" @click="copyInstall">
+              <!-- fa fa-copy / fa fa-check（内联 SVG，避免为单个图标引入 Font Awesome） -->
+              <svg v-if="!copied" viewBox="0 0 448 512" aria-hidden="true">
+                <path
+                  d="M208 0H332.1c12.7 0 24.9 5.1 33.9 14.1l67.9 67.9c9 9 14.1 21.2 14.1 33.9V336c0 26.5-21.5 48-48 48H208c-26.5 0-48-21.5-48-48V48c0-26.5 21.5-48 48-48zM48 128h80v64H64V448h256V416h64v48c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V176c0-26.5 21.5-48 48-48z"
+                />
+              </svg>
+              <svg v-else viewBox="0 0 448 512" aria-hidden="true">
+                <path
+                  d="M438.6 105.4c12.5 12.5 12.5 32.8 0 45.3l-256 256c-12.5 12.5-32.8 12.5-45.3 0l-128-128c-12.5-12.5-12.5-32.8 0-45.3s32.8-12.5 45.3 0L160 338.7 393.4 105.4c12.5-12.5 32.8-12.5 45.3 0z"
+                />
+              </svg>
+            </button>
           </div>
           <p class="banner-hint">{{ t.project.installHint }}</p>
         </template>
@@ -304,17 +316,24 @@ watch(() => route.params.name, load, { immediate: true })
 
 .copy {
   flex-shrink: 0;
-  font-size: 0.72rem;
+  display: inline-flex;
-  font-weight: 700;
+  align-items: center;
-  letter-spacing: 0.08em;
+  justify-content: center;
+  width: 30px;
+  height: 28px;
   color: #006dad;
   background: #fff;
   border: 1px solid transparent;
   border-radius: var(--radius-sm);
-  padding: 5px 11px;
   transition: background 0.15s, color 0.15s;
 }
 
+.copy svg {
+  width: 14px;
+  height: 14px;
+  fill: currentColor;
+}
+
 .copy:hover {
   background: rgba(255, 255, 255, 0.85);
 }