fix: 顶栏文案去重与文档/连库体验更新

顶栏定为：连接 · 新建连接 · 新建查询 · 查询历史 · 快捷键；
同步 docs/落地页、对象树与 connection-types 注册表整理。

apps/desktop/src-tauri/icons/options/cylinder.svg

@@ -0,0 +1,10 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="512" height="512" viewBox="0 0 512 512">
+  <rect width="512" height="512" rx="112" fill="#0B182C"/>
+  <ellipse cx="256" cy="156" rx="128" ry="40" fill="#60A5FA"/>
+  <path d="M128 156v64c0 22 57 40 128 40s128-18 128-40v-64" fill="#3B82F6"/>
+  <ellipse cx="256" cy="220" rx="128" ry="40" fill="#93C5FD"/>
+  <path d="M128 220v64c0 22 57 40 128 40s128-18 128-40v-64" fill="#3B82F6"/>
+  <ellipse cx="256" cy="284" rx="128" ry="40" fill="#BFDBFE"/>
+  <path d="M128 284v88c0 22 57 40 128 40s128-18 128-40v-88" fill="#2563EB"/>
+  <ellipse cx="256" cy="372" rx="128" ry="40" fill="#3B82F6"/>
+</svg>

apps/desktop/src-tauri/icons/options/star.svg

@@ -0,0 +1,7 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="512" height="512" viewBox="0 0 512 512">
+  <rect width="512" height="512" rx="112" fill="#EF4444"/>
+  <g transform="rotate(8 256 256)">
+    <path d="M256 88 L298 214 L432 214 L324 292 L364 420 L256 344 L148 420 L188 292 L80 214 L214 214 Z"
+          fill="none" stroke="#FFFFFF" stroke-width="36" stroke-linejoin="round" stroke-linecap="round"/>
+  </g>
+</svg>

apps/desktop/src-tauri/icons/options/tilt.svg

@@ -0,0 +1,7 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="512" height="512" viewBox="0 0 512 512">
+  <rect width="512" height="512" rx="112" fill="#EF4444"/>
+  <g transform="rotate(12 256 256)">
+    <path d="M256 96 L294 214 L420 214 L318 288 L354 408 L256 336 L158 408 L194 288 L92 214 L218 214 Z"
+          fill="none" stroke="#FFFFFF" stroke-width="34" stroke-linejoin="round" stroke-linecap="round"/>
+  </g>
+</svg>