Add version numbering (v1.0.0)

- package.json: bump to 1.0.0
- server/config.js: export APP_VERSION (from package.json) and GIT_COMMIT
  (from COMMIT_SHA env var set by CI, or git rev-parse --short HEAD fallback)
- GET /api/version: new public endpoint returning { version, commit }
- GET /api/admin-auth/status: includes version and commit in response
- AdminPage sidebar: displays version string (e.g. "v1.0.0 (1d43875)")
  below the Log Out button, styled as muted metadata text

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/AdminPage.tsx

@@ -1070,6 +1070,7 @@ export default function AdminPage({ content, onSave, onLogout }: Props) {
 
   // TOTP management state
   const [totpEnabled, setTotpEnabled] = useState<boolean | null>(null)
+  const [appVersion, setAppVersion] = useState<string>('')
   const [totpSetupQr, setTotpSetupQr] = useState<string | null>(null)
   const [totpSetupSecret, setTotpSetupSecret] = useState<string | null>(null)
   const [totpConfirmCode, setTotpConfirmCode] = useState('')
@@ -1291,7 +1292,10 @@ export default function AdminPage({ content, onSave, onLogout }: Props) {
   useEffect(() => {
     fetch('/api/admin-auth/status')
       .then(r => r.ok ? r.json() : Promise.reject())
-      .then(data => setTotpEnabled(!!(data as { totpEnabled?: boolean }).totpEnabled))
+      .then((data: { totpEnabled?: boolean; version?: string; commit?: string }) => {
+        setTotpEnabled(!!data.totpEnabled)
+        if (data.version) setAppVersion(data.commit ? `v${data.version} (${data.commit})` : `v${data.version}`)
+      })
       .catch(() => {})
   }, [])
 
@@ -3102,6 +3106,9 @@ export default function AdminPage({ content, onSave, onLogout }: Props) {
               Log Out
             </button>
           </div>
+          {appVersion && (
+            <div className="admin-sidebar-version">{appVersion}</div>
+          )}
 
           <div className="admin-nav-search">
             <label htmlFor="admin-nav-search-input">Find a section</label>

src/App.css

@@ -7203,6 +7203,13 @@
     color: var(--brand-warm-white);
   }
 
+  .admin-sidebar-version {
+    padding: 0.5rem 1.1rem 0.75rem;
+    font-size: 0.72rem;
+    color: rgba(240,234,216,0.28);
+    letter-spacing: 0.04em;
+  }
+
   .admin-nav-search {
     display: grid;
     gap: 0.4rem;