[feat](trx-rs): show server/client build info in HTTP footer

Add compile-time build dates for trx-server and trx-frontend-http, propagate server build metadata through rig state/snapshot, and render both versions + build dates in the HTTP footer.

Co-authored-by: OpenAI Codex <codex@openai.com>
Signed-off-by: Stanislaw Grams <stanislawgrams@gmail.com>

src/trx-client/trx-frontend/trx-frontend-http/Cargo.toml

@@ -6,6 +6,7 @@
 name = "trx-frontend-http"
 version = "0.1.0"
 edition = "2021"
+build = "build.rs"
 
 [dependencies]
 trx-core = { path = "../../../trx-core" }

src/trx-client/trx-frontend/trx-frontend-http/assets/web/app.js

@@ -629,10 +629,19 @@ function setDisabled(disabled) {
 }
 
 let serverVersion = null;
+let serverBuildDate = null;
 let serverCallsign = null;
 let serverLat = null;
 let serverLon = null;
 
+function updateFooterBuildInfo() {
+  const serverEl = document.getElementById("footer-server-build");
+  if (!serverEl) return;
+  const ver = serverVersion || "--";
+  const build = serverBuildDate || "--";
+  serverEl.textContent = `trx-server v${ver} ${build}`;
+}
+
 function updateTitle() {
   let title = rigName || "Rig";
   if (serverCallsign) title = `${serverCallsign}'s ${title}`;
@@ -643,10 +652,12 @@ function render(update) {
   if (!update) return;
   if (update.info && update.info.model) rigName = update.info.model;
   if (update.server_version) serverVersion = update.server_version;
+  if (update.server_build_date) serverBuildDate = update.server_build_date;
   if (update.server_callsign) serverCallsign = update.server_callsign;
   if (update.server_latitude != null) serverLat = update.server_latitude;
   if (update.server_longitude != null) serverLon = update.server_longitude;
   updateTitle();
+  updateFooterBuildInfo();
 
   initialized = !!update.initialized;
   if (!initialized) {

src/trx-client/trx-frontend/trx-frontend-http/assets/web/index.html

@@ -266,7 +266,11 @@
       </table>
     </div>
     <div class="footer">
-      <div class="copyright">Built by <a href="https://www.qrzcq.com/call/SP2SJG" target="_blank" rel="noopener">SP2SJG</a> from <a href="https://haxx.space" target="_blank" rel="noopener">haxx.space</a> — <span id="copyright-year"></span></div>
+      <div class="copyright">
+        Built by <a href="https://www.qrzcq.com/call/SP2SJG" target="_blank" rel="noopener">SP2SJG</a> from <a href="https://haxx.space" target="_blank" rel="noopener">haxx.space</a> — <span id="copyright-year"></span>
+        - <span id="footer-server-build">trx-server v-- --</span>
+        - <span id="footer-client-build">trx-client v{ver} {client_build_date}</span>
+      </div>
       <div class="hint" id="power-hint">Connecting…</div>
     </div>
   </div>

src/trx-client/trx-frontend/trx-frontend-http/build.rs

@@ -0,0 +1,25 @@
+use std::time::{SystemTime, UNIX_EPOCH};
+
+fn utc_ymd_from_unix_secs(secs: i64) -> (i32, u32, u32) {
+    let days = secs.div_euclid(86_400);
+    let z = days + 719_468;
+    let era = if z >= 0 { z } else { z - 146_096 } / 146_097;
+    let doe = z - era * 146_097;
+    let yoe = (doe - doe / 1_460 + doe / 36_524 - doe / 146_096) / 365;
+    let mut y = yoe + era * 400;
+    let doy = doe - (365 * yoe + yoe / 4 - yoe / 100);
+    let mp = (5 * doy + 2) / 153;
+    let d = doy - (153 * mp + 2) / 5 + 1;
+    let m = mp + if mp < 10 { 3 } else { -9 };
+    y += if m <= 2 { 1 } else { 0 };
+    (y as i32, m as u32, d as u32)
+}
+
+fn main() {
+    let secs = match SystemTime::now().duration_since(UNIX_EPOCH) {
+        Ok(d) => d.as_secs() as i64,
+        Err(_) => 0,
+    };
+    let (y, m, d) = utc_ymd_from_unix_secs(secs);
+    println!("cargo:rustc-env=TRX_CLIENT_BUILD_DATE={y:04}-{m:02}-{d:02}");
+}

src/trx-client/trx-frontend/trx-frontend-http/src/api.rs

@@ -625,6 +625,7 @@ async fn wait_for_view(mut rx: watch::Receiver<RigState>) -> Result<RigSnapshot,
         initialized: state.initialized,
         server_callsign: state.server_callsign,
         server_version: state.server_version,
+        server_build_date: state.server_build_date,
         server_latitude: state.server_latitude,
         server_longitude: state.server_longitude,
         pskreporter_status: state.pskreporter_status,

src/trx-client/trx-frontend/trx-frontend-http/src/status.rs

@@ -4,6 +4,7 @@
 
 const PKG_NAME: &str = env!("CARGO_PKG_NAME");
 const PKG_VERSION: &str = env!("CARGO_PKG_VERSION");
+const CLIENT_BUILD_DATE: &str = env!("TRX_CLIENT_BUILD_DATE");
 
 const INDEX_HTML: &str = include_str!("../assets/web/index.html");
 pub const STYLE_CSS: &str = include_str!("../assets/web/style.css");
@@ -17,4 +18,5 @@ pub fn index_html() -> String {
     INDEX_HTML
         .replace("{pkg}", PKG_NAME)
         .replace("{ver}", PKG_VERSION)
+        .replace("{client_build_date}", CLIENT_BUILD_DATE)
 }