feat(version): respect GPUSTACK_UI_* env overrides in build info

Allow a wrapping build that checks this source tree out as a
sub-package to stamp its own release tag and commit id onto the UI
(otherwise the version panel reports the host tree's git HEAD,
which the wrapper doesn't control).

GPUSTACK_UI_VERSION overrides the release tag and GPUSTACK_UI_COMMIT_ID
overrides the short commit id; both fall back to the git tag /
commit at HEAD when unset, preserving existing behavior. Names are
namespaced to avoid colliding with the many tools and CI runners
that already set a generic VERSION.

config/utils.ts

@@ -1,13 +1,27 @@
-const child_process = require('child_process');
+import { execSync } from 'child_process';
 
 export const getBranchInfo = () => {
-  const latestCommit = child_process
-    .execSync('git rev-parse HEAD')
-    .toString()
-    .trim();
-  const versionTag = child_process
-    .execSync(`git tag --contains ${latestCommit}`)
-    .toString()
-    .trim();
-  return { version: versionTag || '', commitId: latestCommit.slice(0, 7) };
+  // git may be absent (source archive, bare container) or this tree may
+  // not be a git checkout. Swallow the failure and fall back to the env
+  // overrides below — losing build info shouldn't fail the build.
+  let latestCommit = '';
+  let versionTag = '';
+  try {
+    latestCommit = execSync('git rev-parse HEAD').toString().trim();
+    versionTag = execSync(`git tag --contains ${latestCommit}`)
+      .toString()
+      .trim();
+  } catch {
+    // Not a git checkout / git unavailable; rely on env overrides.
+  }
+  // Respect explicit GPUSTACK_UI_* overrides so a wrapping build that
+  // checks this source tree out as a sub-package can stamp its own
+  // release tag and commit id onto the UI (otherwise the panel reports
+  // the host tree's git HEAD, which the wrapper doesn't control).
+  const overrideVersion = process.env.GPUSTACK_UI_VERSION?.trim();
+  const overrideCommitId = process.env.GPUSTACK_UI_COMMIT_ID?.trim();
+  return {
+    version: overrideVersion || versionTag || '',
+    commitId: overrideCommitId || latestCommit.slice(0, 7)
+  };
 };