Refactor server state and add health checks

webui/app.js

@@ -54,6 +54,10 @@ function setBusy(button, busy) {
   button.disabled = busy;
 }
 
+function confirmAction(message) {
+  return window.confirm(message);
+}
+
 function renderAuth(auth) {
   document.getElementById("auth-status").textContent = auth.status;
   document.getElementById("auth-details").textContent = auth.details || "";
@@ -133,6 +137,7 @@ function renderChannels(channels) {
     });
 
     node.querySelector(".remove-btn").addEventListener("click", async () => {
+      if (!confirmAction(`Remove ${channel.name} from tracked channels?`)) return;
       await api("/api/channels/remove", {
         method: "POST",
         body: JSON.stringify({ channel_id: channel.channel_id }),
@@ -321,6 +326,7 @@ async function main() {
   });
 
   document.getElementById("scrape-all-btn").addEventListener("click", async (event) => {
+    if (!confirmAction("Queue scraping for all tracked channels?")) return;
     setBusy(event.currentTarget, true);
     try {
       await api("/api/jobs/scrape", { method: "POST", body: JSON.stringify({}) });
@@ -331,6 +337,7 @@ async function main() {
   });
 
   document.getElementById("export-all-btn").addEventListener("click", async (event) => {
+    if (!confirmAction("Queue export for all tracked channels?")) return;
     setBusy(event.currentTarget, true);
     try {
       await api("/api/jobs/export", { method: "POST", body: JSON.stringify({}) });
@@ -439,6 +446,9 @@ async function main() {
     const channels = Array.from(document.querySelectorAll(".continuous-channel-checkbox:checked")).map(
       (item) => item.value,
     );
+    if (!runAllTracked && channels.length === 0 && enabled) {
+      if (!confirmAction("Continuous scraping is enabled with no selected channels. Save anyway?")) return;
+    }
     await api("/api/continuous", {
       method: "POST",
       body: JSON.stringify({