Add tab/project quick-switch dropdowns to the project breadcrumb

The project header breadcrumb now always shows the active tab
(previously Overview was hidden), and both the project-name and
tab-level crumbs become dropdowns: project name lists all projects
(with a checkmark on the active one, plus "All Projects"), and the
tab crumb lists Overview/Shots/Assets/Tasks/Schedule/Settings with a
checkmark on the current tab. The trailing ">" separator is skipped
after any crumb that renders as a dropdown.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

frontend/src/components/layout/AppHeader.vue

@@ -8,13 +8,53 @@
     <Breadcrumb class="flex-1">
       <BreadcrumbList>
         <BreadcrumbItem v-for="(crumb, index) in breadcrumbs" :key="index">
-          <BreadcrumbLink v-if="crumb.href" :href="crumb.href">
+          <DropdownMenu v-if="crumb.isProjectCrumb && projectsForSwitcher.length > 0">
+            <DropdownMenuTrigger
+              class="flex items-center gap-1 hover:text-foreground transition-colors outline-none"
+              :class="{ 'font-semibold text-foreground': crumb.isActive }"
+            >
+              {{ crumb.label }}
+              <ChevronDown class="h-3 w-3" />
+            </DropdownMenuTrigger>
+            <DropdownMenuContent align="start">
+              <DropdownMenuItem v-for="project in projectsForSwitcher" :key="project.id" as-child>
+                <router-link :to="`/projects/${project.id}`" class="flex items-center justify-between gap-4 w-full">
+                  {{ project.name }}
+                  <Check v-if="String(project.id) === projectIdParam" class="h-4 w-4 flex-shrink-0" />
+                </router-link>
+              </DropdownMenuItem>
+              <DropdownMenuSeparator />
+              <DropdownMenuItem as-child>
+                <router-link to="/projects">All Projects</router-link>
+              </DropdownMenuItem>
+            </DropdownMenuContent>
+          </DropdownMenu>
+
+          <DropdownMenu v-else-if="crumb.isTabCrumb && projectIdParam">
+            <DropdownMenuTrigger
+              class="flex items-center gap-1 hover:text-foreground transition-colors outline-none"
+              :class="{ 'font-semibold text-foreground': crumb.isActive }"
+            >
+              {{ crumb.label }}
+              <ChevronDown class="h-3 w-3" />
+            </DropdownMenuTrigger>
+            <DropdownMenuContent align="start">
+              <DropdownMenuItem v-for="tabItem in projectTabItems" :key="tabItem.tab" as-child>
+                <router-link :to="`/projects/${projectIdParam}${tabItem.path}`" class="flex items-center justify-between gap-4 w-full">
+                  {{ tabItem.label }}
+                  <Check v-if="currentTab === tabItem.tab" class="h-4 w-4 flex-shrink-0" />
+                </router-link>
+              </DropdownMenuItem>
+            </DropdownMenuContent>
+          </DropdownMenu>
+
+          <BreadcrumbLink v-else-if="crumb.href" :href="crumb.href">
             {{ crumb.label }}
           </BreadcrumbLink>
           <BreadcrumbPage v-else :class="{ 'font-semibold': crumb.isActive }">
             {{ crumb.label }}
           </BreadcrumbPage>
-          <BreadcrumbSeparator v-if="index < breadcrumbs.length - 1" />
+          <BreadcrumbSeparator v-if="index < breadcrumbs.length - 1 && !isDropdownCrumb(crumb)" />
         </BreadcrumbItem>
       </BreadcrumbList>
     </Breadcrumb>
@@ -76,7 +116,7 @@
 </template>
 
 <script setup lang="ts">
-import { computed, ref, watch } from 'vue'
+import { computed, onMounted, ref, watch } from 'vue'
 import { useRoute, useRouter } from 'vue-router'
 import { SidebarTrigger } from '@/components/ui/sidebar'
 import { Separator } from '@/components/ui/separator'
@@ -97,10 +137,11 @@ import {
   BreadcrumbPage,
   BreadcrumbSeparator,
 } from '@/components/ui/breadcrumb'
-import { User, Settings, LogOut } from 'lucide-vue-next'
+import { User, Settings, LogOut, ChevronDown, Check } from 'lucide-vue-next'
 
 import { Avatar, AvatarFallback, AvatarImage } from '@/components/ui/avatar'
 import { useAuthStore } from '@/stores/auth'
+import { useProjectsStore } from '@/stores/projects'
 import { BreadcrumbService, type BreadcrumbItem as BreadcrumbData } from '@/services/breadcrumb'
 import ThemeToggle from '@/components/ui/theme/ThemeToggle.vue'
 import NotificationCenter from './NotificationCenter.vue'
@@ -123,6 +164,42 @@ const { getAvatarUrl } = useAvatarUrl()
 // Generate breadcrumbs based on current route with enhanced context
 const breadcrumbs = ref<BreadcrumbData[]>([])
 
+// The current tab's breadcrumb (Overview/Shots/Assets/...) becomes a quick-nav
+// dropdown instead of a plain link/label - see BreadcrumbItem.isTabCrumb.
+const projectIdParam = computed(() => {
+  const id = route.params.projectId
+  return typeof id === 'string' ? id : Array.isArray(id) ? id[0] : null
+})
+
+const currentTab = computed(() => route.meta?.tab as string | undefined)
+
+const projectTabItems = [
+  { tab: 'overview', label: 'Overview', path: '' },
+  { tab: 'shots', label: 'Shots', path: '/shots' },
+  { tab: 'assets', label: 'Assets', path: '/assets' },
+  { tab: 'tasks', label: 'Tasks', path: '/tasks' },
+  { tab: 'schedule', label: 'Schedule', path: '/schedule' },
+  { tab: 'settings', label: 'Settings', path: '/settings' }
+]
+
+// Project-name breadcrumb becomes a project-switcher dropdown - see BreadcrumbItem.isProjectCrumb.
+const projectsStore = useProjectsStore()
+const projectsForSwitcher = computed(() => projectsStore.projects)
+
+onMounted(() => {
+  if (projectsStore.projects.length === 0 && !projectsStore.isLoading) {
+    projectsStore.fetchProjects()
+  }
+})
+
+// Mirrors the v-if conditions that actually render a crumb as a dropdown,
+// so the trailing ">" separator can be skipped for it.
+function isDropdownCrumb(crumb: BreadcrumbData): boolean {
+  if (crumb.isProjectCrumb) return projectsForSwitcher.value.length > 0
+  if (crumb.isTabCrumb) return !!projectIdParam.value
+  return false
+}
+
 const updateBreadcrumbs = async () => {
   try {
     breadcrumbs.value = await BreadcrumbService.generateBreadcrumbs(route)

frontend/src/services/breadcrumb.ts

@@ -7,6 +7,10 @@ export interface BreadcrumbItem {
   label: string
   href?: string
   isActive?: boolean
+  /** True for the crumb representing the current project tab (Overview/Shots/Assets/...), so the header can render a tab-switcher dropdown on it. */
+  isTabCrumb?: boolean
+  /** True for the crumb representing the current project name, so the header can render a project-switcher dropdown on it. */
+  isProjectCrumb?: boolean
 }
 
 export class BreadcrumbService {
@@ -33,7 +37,8 @@ export class BreadcrumbService {
         // Add project breadcrumb
         crumbs.push({
           label: project ? project.name : `Project ${projectId}`,
-          href: `/projects/${projectId}`
+          href: `/projects/${projectId}`,
+          isProjectCrumb: true
         })
 
         // Handle tab-based navigation
@@ -45,7 +50,8 @@ export class BreadcrumbService {
           if (tab === 'shots' && route.params.episodeId) {
             crumbs.push({
               label: tabLabel,
-              href: `/projects/${projectId}/shots`
+              href: `/projects/${projectId}/shots`,
+              isTabCrumb: true
             })
             
             // Add episode context
@@ -66,11 +72,12 @@ export class BreadcrumbService {
                 })
               }
             }
-          } else if (pathSegments[2] || tab !== 'overview') {
+          } else {
-            // Regular tab navigation (don't show Overview in breadcrumbs unless explicitly navigated to)
+            // Regular tab navigation (Overview included, so the trail always reads Home > Project > Tab)
             crumbs.push({
               label: tabLabel,
-              isActive: true
+              isActive: true,
+              isTabCrumb: true
             })
           }
         }
@@ -85,7 +92,8 @@ export class BreadcrumbService {
               if (crumbs.length > 1) {
                 crumbs[crumbs.length - 1] = {
                   label: 'Shots',
-                  href: `/projects/${projectId}/shots`
+                  href: `/projects/${projectId}/shots`,
+                  isTabCrumb: true
                 }
               }
               crumbs.push({