Add system settings, audit logging, user management, and dark mode fixes

System Settings:
- Add SystemSettings.vue with Zabbix integration, SMTP/email config, SAML SSO settings
- Add Setting model with key-value storage and typed values
- Add settings API with caching

Audit Logging:
- Add AuditLog model tracking user, IP, action, entity changes
- Add comprehensive audit logging to all CRUD operations:
  - Machines, Computers, Equipment, Network devices, VLANs, Subnets
  - Printers, USB devices (including checkout/checkin)
  - Applications, Settings, Users/Roles
- Track old/new values for all field changes
- Mask sensitive values (passwords, tokens) in logs

User Management:
- Add UsersList.vue with full user CRUD
- Add Role management with granular permissions
- Add 41 predefined permissions across 10 categories
- Add users API with roles and permissions endpoints

Reports:
- Add TonerReport.vue for printer supply monitoring

Dark Mode Fixes:
- Fix map position section in PCForm, PrinterForm
- Fix alert-warning in KnowledgeBaseDetail
- All components now use CSS variables for theming

CLI Commands:
- Add flask seed permissions
- Add flask seed settings

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/src/api/index.js

@@ -668,6 +668,75 @@ export const employeesApi = {
 // Alias for different casing
 export const businessUnitsApi = businessunitsApi
 
+// System Settings API
+export const settingsApi = {
+  list(params = {}) {
+    return api.get('/settings', { params })
+  },
+  get(key) {
+    return api.get(`/settings/${key}`)
+  },
+  update(key, value) {
+    return api.put(`/settings/${key}`, { value })
+  },
+  create(data) {
+    return api.post('/settings', data)
+  }
+}
+
+// Audit Logs API
+export const auditLogsApi = {
+  list(params = {}) {
+    return api.get('/auditlogs', { params })
+  },
+  getEntityHistory(entitytype, entityid) {
+    return api.get(`/auditlogs/entity/${entitytype}/${entityid}`)
+  },
+  getStats() {
+    return api.get('/auditlogs/stats')
+  }
+}
+
+// Users API
+export const usersApi = {
+  list() {
+    return api.get('/users')
+  },
+  get(id) {
+    return api.get(`/users/${id}`)
+  },
+  create(data) {
+    return api.post('/users', data)
+  },
+  update(id, data) {
+    return api.put(`/users/${id}`, data)
+  },
+  delete(id) {
+    return api.delete(`/users/${id}`)
+  },
+  // Permissions
+  permissions: {
+    list() {
+      return api.get('/users/permissions')
+    }
+  },
+  // Roles
+  roles: {
+    list() {
+      return api.get('/users/roles')
+    },
+    create(data) {
+      return api.post('/users/roles', data)
+    },
+    update(id, data) {
+      return api.put(`/users/roles/${id}`, data)
+    },
+    delete(id) {
+      return api.delete(`/users/roles/${id}`)
+    }
+  }
+}
+
 // Network API (devices, subnets, and VLANs)
 export const networkApi = {
   // Network devices