huge documentaton restructure for docusaurus

docs/help/en/guest/getting-started.md

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+---
+title: "Quick Start: Join an Event"
+locale: en
+slug: getting-started
+audience: guest
+summary: "Install the Fotospiel app, join an event, and learn the core gestures in under two minutes."
+version_introduced: 2025.4
+requires_app_version: "^3.2.0"
+status: draft
+translation_state: aligned
+last_reviewed_at: 2025-02-22
+owner: guest-success@fotospiel.app
+related:
+  - slug: uploading-photos
+  - slug: offline-sync
+---
+
+## When to read this
+You just received an event code or QR and want to start sharing photos. This guide assumes you have a modern mobile browser (Safari, Chrome, Edge, Samsung Internet) and basic connectivity once for the initial sync.
+
+## Steps
+1. **Open the invite link or scan the QR.** The browser launches the Fotospiel guest app landing page.
+2. **Install for full-screen mode.** Tap *Add to Home Screen* (iOS) or *Install app* (Android). Installation is optional but unlocks offline mode and faster uploads.
+3. **Enter the event code.** Six characters, case-insensitive. If you scanned the QR, the field auto-fills.
+4. **Choose a display name.** This appears next to your uploads within the event feed. No account or email needed.
+5. **Grant camera & storage permissions.** Select “Allow once” or “Allow while using the app” so Fotospiel can capture and store photos locally.
+6. **Sync starter pack.** The app downloads current albums, achievements, and upload rules. A progress bar ensures everything is cached offline.
+7. **Explore gestures.** Swipe up to open the camera, left/right to switch album tabs, long-press a photo to like or report.
+
+## Tips
+- Pin the app to your dock/home row before the event so you can reopen it instantly.
+- If several guests share one device, clear the display name in Settings → Profile between sessions.
+- Screenshots never leave your device unless you upload them manually.
+
+### Need more help?
+See `uploading-photos` for editing and batch upload tips, or `privacy-and-support` if you have questions about data retention.