feat: add smoke tests, agent credit ledger, and player cashback page

Introduce admin smoke-test suite with API probes, agent credit transaction history, and player cashback records; fix SmokeTestModule DI and polish admin/player UI assets.

Co-authored-by: Cursor <cursoragent@cursor.com>

scripts/backup-db.ps1

@@ -0,0 +1,23 @@
+# PostgreSQL backup for TheBet365 (dev/docker-compose defaults)
+param(
+  [string]$OutDir = ".\backups",
+  [string]$DbName = "thebet365",
+  [string]$DbUser = "thebet365",
+  [string]$DbHost = "127.0.0.1",
+  [int]$DbPort = 5432
+)
+
+$ErrorActionPreference = "Stop"
+New-Item -ItemType Directory -Force -Path $OutDir | Out-Null
+
+$stamp = Get-Date -Format "yyyyMMdd-HHmmss"
+$outFile = Join-Path $OutDir "thebet365-$stamp.sql"
+
+Write-Host "Backing up $DbName to $outFile ..."
+$env:PGPASSWORD = $env:THEBET365_DB_PASSWORD
+if (-not $env:PGPASSWORD) {
+  Write-Warning "Set THEBET365_DB_PASSWORD if your Postgres requires a password."
+}
+
+pg_dump -h $DbHost -p $DbPort -U $DbUser -d $DbName -F p -f $outFile
+Write-Host "Done: $outFile"