Add getting started tutorials for DashCaddy

Tutorials covering:
- Getting Started (setup wizard, timezone, deployment modes)
- Theme Customization (theme builder, presets, color customization)
- Viewing Logs (log viewer, live streaming, filtering)
- Quick Search (keyboard shortcuts, navigation)
- Backup & Restore (manual/automated backup, restore workflow)
- Stats Monitoring (resource monitor, live stats, alerts)

Also includes:
- Self-contained HTML getting started guide
- 30+ screenshots capturing UI workflows
- Issues/notes documenting test instance observations

Workflows documented:
- Light theme screenshots
- Dark theme screenshots (partial - theme builder)
- App selector (noted as empty in test instance)
- Theme builder modal
- Logs viewer
- Quick search
- Backup modal
- Stats monitoring

Total: 6 tutorial files, 30+ screenshots, 1 HTML guide

public/tutorials/issues.md

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+# Issues and Notes
+
+## Test Instance Observations
+
+### App Selector Empty
+The App Selector modal opens but shows no apps in the grid. The "Choose an App" message appears with just a Cancel button. This could mean:
+- The test instance doesn't have app templates loaded
+- The app catalog API isn't responding
+- The apps need to be fetched from a backend that's not configured
+
+**Impact:** Could not complete "Deploy Your First App" workflow
+
+**Workaround:** App selector needs backend/app catalog to be configured
+
+### Menu Navigation Issues
+The TOOLS, STATUS, and ADMIN sections in the dashboard have expandable menus. Clicking on section headers (like "TOOLS") didn't expand the menu via standard click methods in headless Chrome.
+
+**Impact:** Could not navigate to some features through normal menu interaction
+
+**Workaround:** Used JavaScript to directly show modals by manipulating CSS display property
+
+### Theme Switching Not Working Properly
+The "🎨 Light" button in the top bar appears to be a display of current theme rather than a toggle. Clicking it doesn't switch themes.
+
+**Impact:** Theme workflow only partially captured - theme builder modal opens but theme switching via the quick button doesn't work
+
+**Workaround:** Use Theme Builder modal to change themes
+
+### Logs/Services Show "Loading..."
+Some services show "Loading logs..." or "Loading container stats..." which suggests the backend APIs aren't returning data in the test instance.
+
+**Impact:** Could see the UI for these features but not actual data
+
+**Workaround:** Document UI even when no data is present
+
+## Technical Observations
+
+### Puppeteer/Chromium Issues
+- Background Chromium processes were being killed by SIGKILL
+- Some clickable elements weren't being recognized as clickable by puppeteer
+- Had to use JavaScript clicks (`element.click()` via `page.evaluate()`) for some interactions
+
+### Session Management
+- TOTP codes expire every 30 seconds
+- Had to generate fresh TOTP for each session
+- Used `process.exit(0)` to avoid graceful cleanup issues that triggered process kills
+
+## Screenshots Captured
+
+### Workflows Documented:
+1. **Getting Started** - Setup wizard, timezone, deployment mode (partial)
+2. **Theme Customization** - Theme builder modal, presets (partial)
+3. **Viewing Logs** - Complete workflow
+4. **Quick Search** - Complete workflow  
+5. **Backup & Restore** - Complete workflow (UI)
+6. **Stats Monitoring** - Complete workflow (UI)
+
+### Workflows Not Fully Documented:
+1. **Deploy First App** - App selector empty, couldn't complete
+2. **Dark Theme Toggle** - Theme builder works but quick toggle doesn't
+3. **Service Status Cards** - Not deeply explored
+4. **Smart Arr Setup** - Not explored
+
+## Recommendations
+
+1. App Selector needs app catalog/backend to show templates
+2. Menu expansion should be tested with real user interaction
+3. Test instance should have some sample services running to show actual data in logs/stats
+4. Consider adding a "demo mode" with fake data for tutorial purposes