refactor(theme): A 类主题通道接入+本地样式回收、操作列统一 actionColumn、顶栏三态头像

- P1 通道：view-ui-plus 锁 1.3.24（A 类 loader + vite /static dev 代理核验，五档/断源降级走查）
- P2 回收：删本地 layout.css/icons.css(+bak) 并清 main.ts import；骨架六类对齐 + 品牌色 var(--brand) 化；index CSS 779→393kB
- P3 操作列：新增 utils/tableActions.ts（同构 UserBase，7 函数+2 表，无 AUTO_MODE）；7 页迁 actionColumn text 形态；旧 operatingHandle/operatingTextHandle 薄封装保留、签名不变
- P4 外观：接入三态头像 avatar.ts+UserAvatar.vue（同步自 YschTheme），顶栏裸 img 替换；外观三键红线零写
- 失效注释订正（layout.vue/def-editor）

src/views/flow/admin/def-editor/components/NodeCard.vue

@@ -55,7 +55,7 @@ function onOpen(e: MouseEvent): void {
     transition: all 0.15s;
 }
 .node-card:hover {
-    border-color: #2d8cf0;
+    border-color: var(--brand);
 }
 .node-card.error {
     border-color: #ed4014;
@@ -72,7 +72,7 @@ function onOpen(e: MouseEvent): void {
     height: 26px;
     border-radius: 6px;
     background: #e8f3ff;
-    color: #2d8cf0;
+    color: var(--brand);
     display: flex;
     align-items: center;
     justify-content: center;

src/views/flow/admin/def-editor/components/OutletLanes.vue

@@ -90,7 +90,7 @@ function renameOutlet(i: number, v: string): void {
 }
 .ol-title {
     text-align: center;
-    color: #2d8cf0;
+    color: var(--brand);
     font-weight: 600;
     font-size: 13px;
     cursor: pointer;
@@ -139,7 +139,7 @@ function renameOutlet(i: number, v: string): void {
 }
 .ol-col-no {
     flex: none;
-    color: #2d8cf0;
+    color: var(--brand);
     font-weight: 600;
     font-size: 13px;
 }
@@ -150,12 +150,12 @@ function renameOutlet(i: number, v: string): void {
     border-radius: 6px;
     padding: 2px 8px;
     font-size: 12px;
-    color: #2d8cf0;
+    color: var(--brand);
     font-weight: 600;
 }
 .ol-outlet:focus {
     outline: none;
-    border-color: #2d8cf0;
+    border-color: var(--brand);
 }
 .ol-col-del {
     flex: none;
@@ -170,8 +170,8 @@ function renameOutlet(i: number, v: string): void {
 .ol-add {
     margin-top: 12px;
     border-style: dashed;
-    color: #2d8cf0;
-    border-color: #2d8cf0;
+    color: var(--brand);
+    border-color: var(--brand);
     background: transparent;
     width: auto;
     padding: 0 16px;
@@ -182,7 +182,7 @@ function renameOutlet(i: number, v: string): void {
 .ol-add:hover {
     background: #f0faff;
     color: #2b85e4;
-    border-color: #2d8cf0;
+    border-color: var(--brand);
 }
 .ol-issue {
     text-align: center;

src/views/flow/admin/def-editor/components/PlusButton.vue

@@ -75,8 +75,8 @@ function pick(kind: "approval" | "parallel" | "notify" | "condition"): void {
     height: 22px;
     border-radius: 50%;
     background: #fff;
-    border: 1px solid #2d8cf0;
-    color: #2d8cf0;
+    border: 1px solid var(--brand);
+    color: var(--brand);
     display: flex;
     align-items: center;
     justify-content: center;
@@ -90,7 +90,7 @@ function pick(kind: "approval" | "parallel" | "notify" | "condition"): void {
 }
 .plus-wrap:hover .plus-btn {
     opacity: 1;
-    background: #2d8cf0;
+    background: var(--brand);
     color: #fff;
     box-shadow: 0 0 0 4px rgba(45, 140, 240, 0.15);
 }
@@ -117,7 +117,7 @@ function pick(kind: "approval" | "parallel" | "notify" | "condition"): void {
     font-size: 12px;
 }
 .mi-icon.approval {
-    background: #2d8cf0;
+    background: var(--brand);
 }
 .mi-icon.notify {
     background: #13a8a8;