new raceday and backup

README.md

@@ -116,6 +116,12 @@ Recommended deployment:
   - `Race Setup` = untimed Open Practice or competition races with personal driver transponders
 - Grouped navigation follows the operating flow: `Start`, `Create`, `Run and follow`, `Directory`, and `System and help`.
 - `Dashboard -> Getting started` links directly to system setup, driver registration, race/practice creation, Timing, and Overlay.
+- Race Day operation:
+  - focused current/next/after-next heat queue
+  - preflight for decoder, participants, transponders, duplicate IDs, lap window, grid and audio
+  - shared start/finish/pause logic with the existing Timing view
+  - automatic consistent SQLite backup before every session start, full data import and data clear operation
+  - latest 30 server backups listed under `Settings -> Storage`
 - Storage/import tools:
   - full race-data export/import for backup or moving to another machine
   - directory export/import for only classes, drivers and cars
@@ -631,6 +637,37 @@ npm run start:fg
 - `windows\start_all.bat`: start AMMC and backend, then open the browser
 - `windows\stop_all.bat`: stop the backend and `ammc-amb.exe`
 
+### Restore a server backup
+
+Backups are stored in `data/backups/`. Restore is intentionally a local server command and is not exposed through the unauthenticated web API.
+
+1. Stop RC RaceCore.
+2. Copy the backup filename from `Settings -> Storage` or list the files in `data/backups/`.
+3. Run the restore command with the explicit confirmation flag.
+4. Start RC RaceCore again.
+
+Windows PowerShell:
+
+```powershell
+npm.cmd stop
+$backup = Get-ChildItem .\data\backups\*.sqlite | Sort-Object LastWriteTime -Descending | Select-Object -First 1
+$backup.Name
+npm.cmd run backup:restore -- $backup.Name --confirm
+npm.cmd start
+```
+
+Linux:
+
+```bash
+npm stop
+backup=$(find data/backups -maxdepth 1 -name '*.sqlite' -printf '%T@ %f\n' | sort -nr | head -n 1 | cut -d' ' -f2-)
+printf 'Restoring %s\n' "$backup"
+npm run backup:restore -- "$backup" --confirm
+npm start
+```
+
+The restore command validates the selected SQLite file and creates a `pre_restore` backup of the current database before replacing it.
+
 ### Update an existing installation without losing data
 
 The SQLite database and local configuration are in `data/`. Do not delete or replace this directory during an update.