Build Number Hash Alignment

Nucleic-Session: F8E9CC32-59CC-4022-B42C-0B0694C57F42
Co-authored-by: Nucleic <[email protected]>

NucleicRemote/NucleicRemote/Views/BuildBanner.swift

@@ -32,11 +32,16 @@ enum BuildChannel {
 }
 
 /// Build identity for the running app: which channel it came from and its build label.
-/// The Mac embeds a git commit via a prebuild plugin; the iOS build number is derived from
-/// `git rev-list --count` at archive time (scripts/ios-release.sh), so `CFBundleVersion`
-/// plays the same role here.
+/// Both platforms show the short git commit: the Mac embeds it via a prebuild plugin, and
+/// here the NucleicRemote target's "Stamp git commit into Info.plist" build phase writes
+/// `git rev-parse --short HEAD` into the `NucleicCommit` Info.plist key. Falls back to
+/// `CFBundleVersion` (the `git rev-list --count` build number from scripts/ios-release.sh)
+/// when git isn't available.
 struct BuildInfo {
     let channel: BuildChannel
+    /// The short git commit the binary was built from (e.g. "a1b2c3d", "+" suffix when the
+    /// tree was dirty) — matching the Mac's banner. Falls back to `CFBundleVersion` / "local"
+    /// if the build phase couldn't resolve a hash.
     let buildLabel: String
     /// `CFBundleShortVersionString` when present, else `nil`.
     let version: String?
@@ -47,7 +52,13 @@ struct BuildInfo {
     init() {
         let info = Bundle.main.infoDictionary
         version = info?["CFBundleShortVersionString"] as? String
-        buildLabel = (info?["CFBundleVersion"] as? String) ?? "local"
+        // Prefer the stamped git commit (mirrors the Mac's GitCommit.hash); an empty or
+        // "unknown" value means git wasn't available at build time, so fall back to the
+        // bundle build number.
+        let commit = info?["NucleicCommit"] as? String
+        buildLabel = commit.flatMap { $0.isEmpty || $0 == "unknown" ? nil : $0 }
+            ?? (info?["CFBundleVersion"] as? String)
+            ?? "local"
         channel = Self.detectChannel(stamped: info?["NucleicChannel"] as? String)
     }