feat: 侧边栏顺序调整、模型选择去除积分价格、修复canvas.css语法错误

- 侧边栏：社区移到底部，工具盒移到资产库上方
- 生成页面：图像/视频模型选择下拉去除积分价格文本
- 修复 canvas.css 多余的右花括号语法错误

src/styles/pages/ecommerce-video.css

@@ -6,9 +6,13 @@
   align-content: initial;
   justify-items: initial;
   gap: 0;
-  overflow: hidden;
+  overflow: auto;
   background: #0e1014;
-  scrollbar-color: #353b45 #0e1014;
+  scrollbar-width: none;
+  -ms-overflow-style: none;
+}
+.product-clone-page[data-tool="clone"] .product-clone-preview--video::-webkit-scrollbar {
+  display: none;
 }
 
 .ecom-video-workspace {
@@ -20,6 +24,11 @@
   overflow: hidden;
   background: #0e1014;
   color: #e5ebf4;
+  scrollbar-width: none;
+  -ms-overflow-style: none;
+}
+.ecom-video-workspace::-webkit-scrollbar {
+  display: none;
 }
 
 .ecom-video-flowbar {
@@ -112,6 +121,42 @@
   gap: 8px;
 }
 
+/* ── Flowbar zoom controls ─────────────────────────── */
+.ecom-video-flowbar__zoom {
+  display: inline-flex;
+  align-items: center;
+  gap: 5px;
+}
+.ecom-video-flowbar__zoom button {
+  width: 26px;
+  height: 26px;
+  border: 1px solid #2c3038;
+  border-radius: 6px;
+  background: #1a1d24;
+  color: #8890a0;
+  font-size: 14px;
+  font-weight: 700;
+  cursor: pointer;
+  display: grid;
+  place-items: center;
+  transition: border-color 150ms ease, color 150ms ease;
+}
+.ecom-video-flowbar__zoom button:hover:not(:disabled) {
+  border-color: #00ff88;
+  color: #00ff88;
+}
+.ecom-video-flowbar__zoom button:disabled {
+  opacity: 0.35;
+  cursor: not-allowed;
+}
+.ecom-video-flowbar__zoom span {
+  min-width: 38px;
+  text-align: center;
+  font-size: 11px;
+  font-weight: 600;
+  color: #6a7282;
+}
+
 .ecom-video-flowbar__error {
   max-width: min(260px, 28vw);
   overflow: hidden;
@@ -181,8 +226,13 @@
   background: #101318;
   padding: 32px 40px;
   display: flex;
-  align-items: stretch;
+  align-items: flex-start;
   justify-content: center;
+  scrollbar-width: none;
+  -ms-overflow-style: none;
+}
+.ecom-video-flow-canvas::-webkit-scrollbar {
+  display: none;
 }
 
 .ecom-video-flow-map {
@@ -418,22 +468,23 @@
   width: 38px;
   height: 38px;
   place-items: center;
-  border: 1px solid #3d3020;
-  border-radius: 8px;
-  background: #15181f;
-  color: #ffe1ad;
+  border: 1px solid #00cc6a;
+  border-radius: 9px;
+  background: #00ff88;
+  color: #06130d;
   font-size: 16px;
+  font-weight: 700;
   cursor: pointer;
   transition:
     transform 150ms ease,
-    border-color 150ms ease,
-    background-color 150ms ease;
+    filter 150ms ease,
+    box-shadow 150ms ease;
 }
 
 .ecom-video-flow-dock button:hover {
-  border-color: #4d3a1a;
-  background: #241c12;
-  transform: translateY(-1px);
+  filter: brightness(1.08);
+  box-shadow: 0 2px 12px rgba(0, 255, 136, 0.25);
+  transform: translateY(-2px);
 }
 
 .ecom-video-flow-notice {