feat: complete web application — FastAPI backend + Vue 3 SPA frontend

- Full FastAPI backend with JWT auth, file management, processing pipeline,
  memory CRUD, barcode mappings, config management, cloud sync
- Vue 3 + Element Plus frontend with dashboard, task history, HTTP logs,
  memory editor, barcode editor, config editor, sync page
- HTTP request logging middleware with SQLite persistence
- Task history tracking with progress and retry support
- File metadata recording for upload/download operations
- WebAuth section in config.ini for bcrypt password storage
- Bug fix: logs.py count query returns tuple not dict

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

web/frontend/src/stores/auth.ts

@@ -0,0 +1,34 @@
+import { defineStore } from 'pinia'
+import { ref, computed } from 'vue'
+import api from '../api'
+
+export const useAuthStore = defineStore('auth', () => {
+  const token = ref(localStorage.getItem('token') || '')
+  const username = ref('')
+
+  const isAuthenticated = computed(() => !!token.value)
+
+  async function login(user: string, password: string) {
+    const res = await api.post('/auth/login', { username: user, password })
+    token.value = res.data.access_token
+    localStorage.setItem('token', token.value)
+    username.value = user
+  }
+
+  function logout() {
+    token.value = ''
+    username.value = ''
+    localStorage.removeItem('token')
+  }
+
+  async function fetchUser() {
+    try {
+      const res = await api.get('/auth/me')
+      username.value = res.data.username
+    } catch {
+      logout()
+    }
+  }
+
+  return { token, username, isAuthenticated, login, logout, fetchUser }
+})