[feat](trx-frontend-http): rework the page footer

The footer floated in space below the content with no rule to close the
page, its two clusters sat on a text baseline that left the source pill
hanging, and the status hint was a plain line of text a size larger than
the attribution beside it.

Now a hairline closes the page the way .tab-bar opens it, the clusters
centre on one line, and the attribution drops the opacity it stacked on
top of --text-muted, which had put it below a readable contrast ratio.

The status hint becomes a pill with a state dot: green when ready, amber
while a command is in flight, red on connection loss.  The colour comes
from a data-state attribute, so every hint now goes through setPowerHint
instead of assigning textContent directly.  --status-ok carries the
indicator green; .about-status-on picks it up too, which darkens it on
light themes where the old value was barely legible.

Signed-off-by: Stan Grams <sjg@haxx.space>

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

@@ -2724,6 +2724,17 @@ if (headerStylePickSelect) {
 function readyText() {
   return lastClientCount !== null ? `Ready · ${lastClientCount} user${lastClientCount !== 1 ? "s" : ""}` : "Ready";
 }
+var HINT_ERROR_RE = /failed|missing|unavailable|unknown|lost|required/i;
+var HINT_BUSY_RE = /initializ|connecting|retrying|scanning|shifting|waiting|sending|switching|toggling|setting|not fully/i;
+function hintState(msg) {
+  if (HINT_ERROR_RE.test(msg)) return "error";
+  if (HINT_BUSY_RE.test(msg) || /[\u2026]$|\.\.\.$/.test(msg)) return "busy";
+  return "ok";
+}
+function setPowerHint(msg) {
+  powerHint.textContent = msg;
+  powerHint.dataset.state = hintState(msg);
+}
 function rigBadgeColor(rigId) {
   const text = (rigId || "rx").toString();
   let hash = 0;
@@ -2837,12 +2848,12 @@ function refreshOperatorLayoutCapabilities() {
   });
 }
 function showHint(msg, duration) {
-  powerHint.textContent = msg;
+  setPowerHint(msg);
   if (hintTimer) clearTimeout(hintTimer);
   if (duration) hintTimer = setTimeout(() => {
-    powerHint.textContent = readyText();
+    setPowerHint(readyText());
   }, duration);
-  if (/failed|missing|unavailable|unknown|lost|required/i.test(msg)) {
+  if (HINT_ERROR_RE.test(msg)) {
     window.trxUi?.notify(msg, { kind: "error" });
   }
 }
@@ -4405,13 +4416,13 @@ function render(update) {
       console.info("Rig initializing:", { manufacturer: manu, model, revision: rev });
       loadingEl.style.display = "";
       if (contentEl) contentEl.style.display = "none";
-      powerHint.textContent = "Initializing rig…";
+      setPowerHint("Initializing rig…");
       setDisabled(true);
       return;
     }
     loadingEl.style.display = "none";
     if (contentEl) contentEl.style.display = "";
-    powerHint.textContent = "Rig not fully initialized yet";
+    setPowerHint("Rig not fully initialized yet");
   } else {
     loadingEl.style.display = "none";
     if (contentEl) contentEl.style.display = "";
@@ -4730,7 +4741,7 @@ function render(update) {
     powerBtn.disabled = true;
     powerBtn.textContent = "Power unavailable";
     powerBtn.setAttribute("aria-pressed", "false");
-    powerHint.textContent = "State unknown";
+    setPowerHint("State unknown");
   }
   if (update.status && update.status.tx && typeof update.status.tx.limit === "number") {
     txLimitInput.value = String(update.status.tx.limit);
@@ -4827,7 +4838,7 @@ function render(update) {
   if (Array.isArray(update.remotes)) {
     applyRigList(typeof update.active_remote === "string" ? update.active_remote : null, update.remotes);
   }
-  powerHint.textContent = readyText();
+  setPowerHint(readyText());
   lastLocked = update.status?.lock === true;
   window.trxUi?.setButtonState(lockBtn, {
     active: lastLocked,
@@ -4905,11 +4916,11 @@ function connect() {
       render(data);
       lastEventAt = Date.now();
       if (data.server_connected === false) {
-        powerHint.textContent = "trx-server connection lost";
+        setPowerHint("trx-server connection lost");
         if (tabMainEl) tabMainEl.classList.add("server-disconnected");
       } else {
         if (tabMainEl) tabMainEl.classList.remove("server-disconnected");
-        if (data.initialized) powerHint.textContent = readyText();
+        if (data.initialized) setPowerHint(readyText());
       }
     } catch (e) {
       console.error("Bad event data", e);
@@ -4932,7 +4943,7 @@ function connect() {
   });
   source.onerror = () => {
     if (source.readyState === EventSource.CLOSED) {
-      powerHint.textContent = "trx-client connection lost, retrying…";
+      setPowerHint("trx-client connection lost, retrying…");
       setConnLostOverlay(true, "trx-client connection lost", "Retrying…", true);
       source.close();
       void pollFreshSnapshot();
@@ -4942,7 +4953,7 @@ function connect() {
   esHeartbeat = setInterval(() => {
     const now = Date.now();
     if (now - lastEventAt > 15e3) {
-      powerHint.textContent = "trx-client connection lost, retrying…";
+      setPowerHint("trx-client connection lost, retrying…");
       setConnLostOverlay(true, "trx-client connection lost", "Retrying…", true);
       source.close();
       void pollFreshSnapshot();