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/views/settings/SettingsIndex.vue

@@ -62,12 +62,30 @@
         <h3>Subnets</h3>
         <p>Manage IP subnets and DHCP</p>
       </router-link>
+
+      <router-link to="/settings/system" class="settings-card">
+        <div class="card-icon"><Settings :size="28" /></div>
+        <h3>System Settings</h3>
+        <p>Configure integrations and system options</p>
+      </router-link>
+
+      <router-link to="/settings/auditlogs" class="settings-card">
+        <div class="card-icon"><FileText :size="28" /></div>
+        <h3>Audit Logs</h3>
+        <p>View system activity and change history</p>
+      </router-link>
+
+      <router-link to="/settings/users" class="settings-card">
+        <div class="card-icon"><Users :size="28" /></div>
+        <h3>Users & Roles</h3>
+        <p>Manage user accounts and permissions</p>
+      </router-link>
     </div>
   </div>
 </template>
 
 <script setup>
-import { Factory, MapPin, Tag, Package, Monitor, Laptop, Cog, Building, Globe, Link } from 'lucide-vue-next'
+import { Factory, MapPin, Tag, Package, Monitor, Laptop, Cog, Building, Globe, Link, Settings, FileText, Users } from 'lucide-vue-next'
 </script>
 
 <style scoped>