Frontend: dynamic status pipeline, categories/projects, tag+assign+reallocate UI

- Board/List/Today views now render the admin-editable status pipeline
  instead of a hardcoded todo/doing/done enum (StatusesContext)
- Category filter chip-bar on Board and List views (ported the idea from
  reviewing the FD's own build, simplified to match our flat single-category
  model rather than his tree)
- New Projects list + detail views, project create/edit modal
- New Dispatch view for the 'reallocate' cap -- flat cross-user task list
  with an inline move action (deliberately not routed through the shared
  task drawer, since GET /api/tasks/:id only grants visibility to
  owner/assignee/tagged users, not dispatchers)
- Task drawer: dynamic status pills, category/project selects, tag
  picker (share/watch, no cap needed), assign field (owner + assign cap),
  reallocate field (reallocate cap) -- all fields disabled for non-owners
  since the backend's single PATCH endpoint is owner-gated
- Settings page: status pipeline + category management (settings cap)
- Fixed missing input[type="datetime-local"]/[type="time"] styling -- the
  Due/Remind fields were rendering with unstyled browser defaults

frontend/src/App.tsx

@@ -5,10 +5,16 @@ import IosInstallHint from './components/IosInstallHint'
 import { useVersionCheck } from './hooks/useVersionCheck'
 import Layout from './components/Layout'
 import { ListsProvider } from './context/ListsContext'
+import { StatusesProvider } from './context/StatusesContext'
+import { CategoriesProvider } from './context/CategoriesContext'
+import { ProjectsProvider } from './context/ProjectsContext'
 import { TaskDrawerProvider } from './components/TaskDrawer'
 import TodayView from './pages/TodayView'
 import ListView from './pages/ListView'
 import BoardView from './pages/BoardView'
+import ProjectsView from './pages/ProjectsView'
+import ProjectDetailView from './pages/ProjectDetailView'
+import DispatchView from './pages/DispatchView'
 import Settings from './pages/Settings'
 
 export default function App() {
@@ -18,18 +24,27 @@ export default function App() {
       <BrowserRouter basename="/tasks">
         <AuthGate>
           <ListsProvider>
-            <TaskDrawerProvider>
-              <Layout>
-                <Routes>
-                  <Route path="/" element={<Navigate to="/today" replace />} />
-                  <Route path="/today" element={<TodayView />} />
-                  <Route path="/board" element={<BoardView />} />
-                  <Route path="/list/:id" element={<ListView />} />
-                  <Route path="/settings" element={<Settings />} />
-                  <Route path="*" element={<Navigate to="/today" replace />} />
-                </Routes>
-              </Layout>
-            </TaskDrawerProvider>
+            <StatusesProvider>
+              <CategoriesProvider>
+                <ProjectsProvider>
+                  <TaskDrawerProvider>
+                    <Layout>
+                      <Routes>
+                        <Route path="/" element={<Navigate to="/today" replace />} />
+                        <Route path="/today" element={<TodayView />} />
+                        <Route path="/board" element={<BoardView />} />
+                        <Route path="/list/:id" element={<ListView />} />
+                        <Route path="/projects" element={<ProjectsView />} />
+                        <Route path="/project/:id" element={<ProjectDetailView />} />
+                        <Route path="/dispatch" element={<DispatchView />} />
+                        <Route path="/settings" element={<Settings />} />
+                        <Route path="*" element={<Navigate to="/today" replace />} />
+                      </Routes>
+                    </Layout>
+                  </TaskDrawerProvider>
+                </ProjectsProvider>
+              </CategoriesProvider>
+            </StatusesProvider>
           </ListsProvider>
         </AuthGate>
       </BrowserRouter>