diff --git a/src/components/ConfirmDialog.vue b/src/components/ConfirmDialog.vue
index 52a4ea6..eeeafec 100644
--- a/src/components/ConfirmDialog.vue
+++ b/src/components/ConfirmDialog.vue
@@ -84,6 +84,8 @@ watch(() => props.visible, () => {})
   color: var(--df-text, #333);
   line-height: 1.5;
   margin-bottom: 16px;
+  /* anywhere:长 Windows 路径等无空格长串可断行,不撑破 360px 弹窗 */
+  overflow-wrap: anywhere;
 }
 .confirm-actions {
   display: flex;
diff --git a/src/components/project/FilePreview.vue b/src/components/project/FilePreview.vue
index 00126f9..6aca8db 100644
--- a/src/components/project/FilePreview.vue
+++ b/src/components/project/FilePreview.vue
@@ -641,7 +641,7 @@ onUnmounted(() => {
 }
 
 .preview-size { color: var(--df-text-dim); flex-shrink: 0; }
-.preview-truncated { color: #f0a020; flex-shrink: 0; }
+.preview-truncated { color: var(--df-git-modified); flex-shrink: 0; }
 
 .git-badge {
   flex-shrink: 0;
@@ -655,7 +655,7 @@ onUnmounted(() => {
 
 .git-modified { background: color-mix(in srgb, var(--df-git-modified) 18%, transparent); color: var(--df-git-modified); }
 .git-added { background: color-mix(in srgb, var(--df-git-added) 18%, transparent); color: var(--df-git-added); }
-.git-untracked { background: rgba(150, 150, 150, 0.18); color: #999; }
+.git-untracked { background: rgba(150, 150, 150, 0.18); color: var(--df-git-untracked); }
 .git-deleted { background: color-mix(in srgb, var(--df-git-deleted) 18%, transparent); color: var(--df-git-deleted); }
 .git-other { background: color-mix(in srgb, var(--df-git-untracked) 18%, transparent); color: var(--df-git-untracked); }
 
@@ -737,7 +737,7 @@ onUnmounted(() => {
   font-size: 13px;
 }
 
-.preview-error { color: #e05050; }
+.preview-error { color: var(--df-danger); }
 .binary-icon { font-size: 32px; opacity: 0.5; }
 
 .preview-image {
@@ -1062,7 +1062,9 @@ onUnmounted(() => {
 
 .diff-line-text {
   flex: 1;
-  white-space: pre;
+  /* pre-wrap + break-all:diff 长行折行显示,替代旧 pre+hidden 的静默裁剪(内容不可达) */
+  white-space: pre-wrap;
+  word-break: break-all;
   overflow: hidden;
 }
 
diff --git a/src/components/project/ProjectCard.vue b/src/components/project/ProjectCard.vue
index e0418cf..5f53f40 100644
--- a/src/components/project/ProjectCard.vue
+++ b/src/components/project/ProjectCard.vue
@@ -137,7 +137,7 @@ watch(() => props.view, () => nextTick(measureDesc))
 .stage-testing { background: rgba(255,217,61,0.15); color: var(--df-warning); }
 .stage-release { background: rgba(100,255,218,0.15); color: var(--df-success); }
 /* WK-1:暂停/取消置灰(PROJECT_STATUS_BADGE_CLASS 映射) */
-.stage-dim { background: rgba(158,158,158,0.15); color: #9e9e9e; }
+.stage-dim { background: rgba(158,158,158,0.15); color: var(--df-text-dim); }
 
 .card-desc-wrap {
   position: relative;
diff --git a/src/components/task/TaskBatchBar.vue b/src/components/task/TaskBatchBar.vue
index 3c4fbb1..19b26c3 100644
--- a/src/components/task/TaskBatchBar.vue
+++ b/src/components/task/TaskBatchBar.vue
@@ -269,8 +269,8 @@ function confirmDelete() {
   box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
   max-width: 80vw;
 }
-.tbb-toast--success { border-color: rgba(82, 196, 26, 0.5); color: #67c23a; }
-.tbb-toast--warning { border-color: rgba(230, 162, 60, 0.5); color: #e6a23c; }
+.tbb-toast--success { border-color: color-mix(in srgb, var(--df-success) 50%, transparent); color: var(--df-success); }
+.tbb-toast--warning { border-color: color-mix(in srgb, var(--df-warning) 50%, transparent); color: var(--df-warning); }
 .tbb-toast--error { border-color: rgba(240, 101, 101, 0.5); color: var(--df-danger); }
 .toast-enter-active, .toast-leave-active { transition: opacity 0.2s; }
 .toast-enter-from, .toast-leave-to { opacity: 0; }
diff --git a/src/components/task/TaskOutputCard.vue b/src/components/task/TaskOutputCard.vue
index b786d1f..edce7ab 100644
--- a/src/components/task/TaskOutputCard.vue
+++ b/src/components/task/TaskOutputCard.vue
@@ -94,6 +94,7 @@ const reviewSuggestions = computed<string[]>(() => {
   display: flex;
   flex-direction: column;
   gap: 10px;
+  overflow-x: auto;
 }
 /* 自审结论卡:verdict 红绿标(pass 绿 / fail 红 / unknown 灰),复用全局 --df-success/danger token */
 .review-card {
diff --git a/src/i18n/en/tasks.ts b/src/i18n/en/tasks.ts
index df8f12d..9f0fdff 100644
--- a/src/i18n/en/tasks.ts
+++ b/src/i18n/en/tasks.ts
@@ -127,6 +127,7 @@ export default {
       createFailed: 'Failed to create task',
       deleteFailed: 'Failed to delete task',
       updateFailed: 'Failed to update task',
+      selectProject: 'Please select a project',
     },
   },
 }
diff --git a/src/i18n/zh-CN/tasks.ts b/src/i18n/zh-CN/tasks.ts
index ea137e6..050cb48 100644
--- a/src/i18n/zh-CN/tasks.ts
+++ b/src/i18n/zh-CN/tasks.ts
@@ -127,6 +127,7 @@ export default {
       createFailed: '创建任务失败',
       deleteFailed: '删除任务失败',
       updateFailed: '更新任务失败',
+      selectProject: '请选择项目',
     },
   },
 }
diff --git a/src/router/index.ts b/src/router/index.ts
index 9941946..9b13430 100644
--- a/src/router/index.ts
+++ b/src/router/index.ts
@@ -65,12 +65,15 @@ const routes = [
     component: () => import('../views/AuditLog.vue'),
     meta: { title: '审批历史' },
   },
-  {
-    path: '/dev/x6',
-    name: 'X6Demo',
-    component: () => import('../components/dev/X6Demo.vue'),
-    meta: { title: 'X6 v3 验证' },
-  },
+  // X6 v3 验证 demo:仅开发环境注册,生产构建不含该路由
+  ...(import.meta.env.DEV
+    ? [{
+        path: '/dev/x6',
+        name: 'X6Demo',
+        component: () => import('../components/dev/X6Demo.vue'),
+        meta: { title: 'X6 v3 验证' },
+      }]
+    : []),
   {
     path: '/settings',
     name: 'Settings',
diff --git a/src/styles/global.css b/src/styles/global.css
index 14ac998..43f7e02 100644
--- a/src/styles/global.css
+++ b/src/styles/global.css
@@ -49,6 +49,10 @@
   --df-border:            rgba(255,255,255,0.06);
   --df-border-strong:     rgba(255,255,255,0.10);
 
+  /* — Scrollbar: 滚动条 thumb(默认深色值,浅色主题在 [data-theme="light"] 覆写)— */
+  --df-scrollbar:         rgba(255,255,255,0.08);
+  --df-scrollbar-hover:   rgba(255,255,255,0.14);
+
   /* — Radius: 2/4/6/8/10 渐进（全站统一走 token）— */
   --df-radius-xs:         2px;
   --df-radius-sm:         4px;
@@ -107,6 +111,9 @@
 
   --df-border:            rgba(0,0,0,0.08);
   --df-border-strong:     rgba(0,0,0,0.14);
+
+  --df-scrollbar:         rgba(0,0,0,0.2);
+  --df-scrollbar-hover:   rgba(0,0,0,0.3);
 }
 
 * { margin: 0; padding: 0; box-sizing: border-box; }
@@ -129,8 +136,8 @@ html, body, #app {
 /* — Scrollbar — */
 ::-webkit-scrollbar { width: 5px; height: 5px; }
 ::-webkit-scrollbar-track { background: transparent; }
-::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.08); border-radius: var(--df-radius-xs); }
-::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.14); }
+::-webkit-scrollbar-thumb { background: var(--df-scrollbar); border-radius: var(--df-radius-xs); }
+::-webkit-scrollbar-thumb:hover { background: var(--df-scrollbar-hover); }
 
 /* — Selection — */
 /* 选中态用 accent 实色 + 白字：保证紫底气泡(accent)选中也高对比可读,
diff --git a/src/views/FileExplorerDetached.vue b/src/views/FileExplorerDetached.vue
index 6068f35..467539c 100644
--- a/src/views/FileExplorerDetached.vue
+++ b/src/views/FileExplorerDetached.vue
@@ -1,10 +1,11 @@
 <template>
   <div class="fe-detached-shell">
-    <!-- 等待 projectId 参数加载 -->
-    <div v-if="!projectId" class="fe-detached-loading">
-      <span class="spinner"></span>
+    <!-- projectId 来自 URL query(同步可得),缺失时直接给错误态而非无限 spinner -->
+    <FileExplorer v-if="projectId" :project-id="projectId" />
+    <div v-else class="fe-detached-error">
+      <span class="fe-detached-error-icon">⚠️</span>
+      <p>缺少 projectId 参数，无法打开文件浏览器</p>
     </div>
-    <FileExplorer v-else :project-id="projectId" />
   </div>
 </template>
 
@@ -29,27 +30,19 @@ const projectId = computed(() => (route.query.projectId as string) || '')
   background: var(--df-bg);
 }
 
-.fe-detached-loading {
+.fe-detached-error {
   display: flex;
+  flex-direction: column;
   justify-content: center;
   align-items: center;
+  gap: 12px;
   height: 100%;
   color: var(--df-text-dim);
   font-size: 14px;
 }
 
-.spinner {
-  width: 20px;
-  height: 20px;
-  border: 2px solid var(--df-border, #444);
-  border-top-color: var(--df-accent, #3a8);
-  border-radius: 50%;
-  animation: df-spin 0.8s linear infinite;
-  display: inline-block;
-  margin-right: 8px;
-}
-
-@keyframes df-spin {
-  to { transform: rotate(360deg); }
+.fe-detached-error-icon {
+  font-size: 40px;
+  opacity: 0.6;
 }
 </style>
diff --git a/src/views/ProjectDetail.vue b/src/views/ProjectDetail.vue
index 54effd1..7a95e73 100644
--- a/src/views/ProjectDetail.vue
+++ b/src/views/ProjectDetail.vue
@@ -1427,13 +1427,14 @@ onUnmounted(() => {
   border-radius: var(--df-radius-lg);
   font-weight: 500;
 }
-.stage-planning { background: rgba(100,181,246,0.15); color: #64b5f6; }
+/* 阶段色全走语义 token(对齐全站约定:releasing/completed=success,见 ActiveProjectsPanel dot-release) */
+.stage-planning { background: var(--df-info-bg); color: var(--df-info); }
 .stage-in_progress { background: var(--df-accent-soft); color: var(--df-accent); }
-.stage-testing { background: rgba(255,193,7,0.15); color: #ffc107; }
-.stage-releasing { background: rgba(156,39,176,0.15); color: #ce93d8; }
-.stage-completed { background: rgba(100,200,100,0.15); color: #64c864; }
-.stage-paused { background: rgba(158,158,158,0.15); color: #9e9e9e; }
-.stage-cancelled { background: rgba(244,67,54,0.15); color: #f44336; }
+.stage-testing { background: var(--df-warning-bg); color: var(--df-warning); }
+.stage-releasing { background: var(--df-success-bg); color: var(--df-success); }
+.stage-completed { background: var(--df-success-bg); color: var(--df-success); }
+.stage-paused { background: rgba(158,158,158,0.15); color: var(--df-text-dim); }
+.stage-cancelled { background: var(--df-danger-bg); color: var(--df-danger); }
 
 /* .header-actions 已提取到 styles/global.css 全局 */
 
diff --git a/src/views/TaskDetail.vue b/src/views/TaskDetail.vue
index 82027b6..dfa1874 100644
--- a/src/views/TaskDetail.vue
+++ b/src/views/TaskDetail.vue
@@ -874,7 +874,7 @@ onBeforeUnmount(() => {
   border-radius: var(--df-radius-xs);
 }
 .priority-critical { background: rgba(255,107,107,0.2); color: var(--df-danger); }
-.priority-high { background: rgba(255,152,0,0.2); color: #ff9800; }
+.priority-high { background: rgba(255,152,0,0.2); color: var(--df-warning); }
 .priority-medium { background: rgba(100,181,246,0.2); color: var(--df-info); }
 .priority-low { background: rgba(90,99,128,0.2); color: var(--df-text-dim); }
 
@@ -916,6 +916,7 @@ onBeforeUnmount(() => {
 .description-wrap {
   position: relative;
   overflow: hidden;
+  overflow-x: auto;
   transition: max-height 0.25s var(--df-ease);
 }
 .desc-toggle {
diff --git a/src/views/Tasks.vue b/src/views/Tasks.vue
index 4cd79b6..c0eccae 100644
--- a/src/views/Tasks.vue
+++ b/src/views/Tasks.vue
@@ -825,7 +825,7 @@ function openCreateModal(parent?: TaskRecord) {
 }
 
 async function confirmCreate() {
-  if (!newTaskProjectId.value) { alert('请选择项目'); return }
+  if (!newTaskProjectId.value) { showToast(t('tasks.err.selectProject'), 'error'); return }
   if (!newTaskTitle.value.trim()) return
   submitting.value = true
   try {
@@ -1244,7 +1244,7 @@ onUnmounted(() => {
   flex-shrink: 0;
 }
 .priority-critical { background: rgba(255,107,107,0.2); color: var(--df-danger); }
-.priority-high { background: rgba(255,152,0,0.2); color: #ff9800; }
+.priority-high { background: rgba(255,152,0,0.2); color: var(--df-warning); }
 .priority-medium { background: rgba(100,181,246,0.2); color: var(--df-info); }
 .priority-low { background: rgba(90,99,128,0.2); color: var(--df-text-dim); }