feat(ci): stamp build metadata and validate footer version hash

apps/web/src/lib/build-info.test.ts

@@ -0,0 +1,29 @@
+import { afterEach, describe, expect, it, vi } from "vitest"
+
+import { getBuildInfo } from "./build-info"
+
+afterEach(() => {
+  vi.unstubAllEnvs()
+})
+
+describe("getBuildInfo (web)", () => {
+  it("returns fallback values when env is missing", () => {
+    vi.stubEnv("NEXT_PUBLIC_APP_VERSION", "")
+    vi.stubEnv("NEXT_PUBLIC_GIT_SHA", "")
+
+    expect(getBuildInfo()).toEqual({
+      version: "0.0.1-dev",
+      sha: "local",
+    })
+  })
+
+  it("uses env values and truncates git sha", () => {
+    vi.stubEnv("NEXT_PUBLIC_APP_VERSION", "0.2.0")
+    vi.stubEnv("NEXT_PUBLIC_GIT_SHA", "123456789abc")
+
+    expect(getBuildInfo()).toEqual({
+      version: "0.2.0",
+      sha: "1234567",
+    })
+  })
+})