Show unseen Server commits after login.

Bake first-parent git log at Server build and remember the SHA in a browser cookie.

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

tools/embed-changelog.ps1

@@ -0,0 +1,40 @@
+# UTF-8 first-parent log for HSchool.Server. Keep in sync with embed-changelog.sh.
+param(
+    [Parameter(Mandatory = $true)]
+    [string] $RepoRoot,
+    [Parameter(Mandatory = $true)]
+    [string] $Output
+)
+
+$ErrorActionPreference = "Stop"
+
+$dir = Split-Path -Parent $Output
+if (-not (Test-Path -LiteralPath $dir)) {
+    New-Item -ItemType Directory -Path $dir | Out-Null
+}
+
+$sha = ""
+$log = ""
+Push-Location -LiteralPath $RepoRoot
+try {
+    $sha = (git rev-parse HEAD 2>$null | Out-String).Trim()
+    if ($LASTEXITCODE -ne 0 -or $sha.Length -ne 40) {
+        $sha = ""
+    }
+    elseif ($sha.Length -eq 40) {
+        $log = git -c core.quotepath=false log --first-parent --encoding=UTF-8 --pretty=format:%H%x1f%cI%x1f%s
+        if ($LASTEXITCODE -ne 0) {
+            $log = ""
+        }
+    }
+}
+finally {
+    Pop-Location
+}
+
+$text = $sha + "`n"
+if (-not [string]::IsNullOrEmpty($log)) {
+    $text += $log.TrimEnd() + "`n"
+}
+
+[System.IO.File]::WriteAllText($Output, $text, [System.Text.UTF8Encoding]::new($false))

tools/embed-changelog.sh

@@ -0,0 +1,23 @@
+#!/bin/sh
+# UTF-8 first-parent log for HSchool.Server. Keep in sync with embed-changelog.ps1.
+set -e
+RepoRoot=$1
+Output=$2
+if [ -z "$RepoRoot" ] || [ -z "$Output" ]; then
+  echo "usage: embed-changelog.sh <repo-root> <output>" >&2
+  exit 1
+fi
+mkdir -p "$(dirname "$Output")"
+sha=
+log=
+if sha=$(git -C "$RepoRoot" rev-parse HEAD 2>/dev/null) && [ "${#sha}" -eq 40 ]; then
+  log=$(git -C "$RepoRoot" -c core.quotepath=false log --first-parent --encoding=UTF-8 --pretty=format:%H%x1f%cI%x1f%s) || log=
+else
+  sha=
+fi
+{
+  printf '%s\n' "$sha"
+  if [ -n "$log" ]; then
+    printf '%s\n' "$log"
+  fi
+} > "$Output"