Sublime-style Build-n versioning + About box

Build n = commit count, baked at build time into a gitignored
version.gen.ts (postinstall + all build scripts regenerate it). About
lives in the macOS app menu and as a footer row in the options popover
(the cross-platform path), showing build, commit, date and engines.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/shared/branding.ts

@@ -1,12 +1,18 @@
 // The single place to rebrand the app. Everything (window title, bundle name,
 // app-data directory, UI header, icon) reads from here.
+import { BUILD } from "./version.gen";
+
 export const BRANDING = {
 	appName: "miniSCP",
 	identifier: "es.teknes.miniscp",
 	// Previous app names: their app-data folders are migrated on boot
 	// (see migrateLegacyDataDir in src/bun/store/paths.ts).
 	legacyNames: ["BunSCP"],
-	version: "0.1.0",
+	// Sublime-style versioning: n = commit count (scripts/gen-version.ts).
+	// `version` stays semver-shaped for electrobun's config/updater.
+	version: `0.1.${BUILD.number}`,
+	buildLabel: `Build ${BUILD.number}`,
+	build: BUILD,
 	// macOS build converts this .iconset folder into AppIcon.icns.
 	// Regenerate from assets/icon.png with scripts/gen-iconset.sh.
 	icon: "assets/icon.iconset",