[feat](trx-frontend-http): implement Phase 1 UX/UI quick wins from Settings analysis

- IX-2: Add confirm() dialogs before all destructive actions (10 history
  clear buttons, scheduler reset, background decode reset)
- IX-6: Add Select All / Deselect All buttons for background decode
  bookmark checklist
- IX-1: Add dirty-state indicator (pulsing dot) on Save buttons when
  unsaved changes exist in scheduler and background decode panels
- A-4: Add role="alert" and aria-live="polite" to toast notification
  elements for screen reader accessibility
- A-3: Add Unicode symbol prefixes to background decode state labels
  (checkmark/triangle/cross) so state is distinguishable without color

https://claude.ai/code/session_01ShfPMW9hPLD3czp9YovkbJ
Signed-off-by: Claude <noreply@anthropic.com>

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

@@ -1074,7 +1074,7 @@
       </div>
       <div id="subtab-settings-scheduler" class="sub-tab-panel">
         <div id="scheduler-panel" class="sch-panel">
-          <div class="sch-toast" id="scheduler-toast" style="display:none;"></div>
+          <div class="sch-toast" id="scheduler-toast" role="alert" aria-live="polite" style="display:none;"></div>
           <!-- Now Playing status card (moved to top) -->
           <div class="now-playing-card">
             <div id="scheduler-status-card" class="sch-status-card">No activity yet.</div>
@@ -1254,7 +1254,7 @@
       </div>
       <div id="subtab-settings-background-decode" class="sub-tab-panel" style="display:none;">
         <div id="background-decode-panel" class="sch-panel">
-          <div class="sch-toast" id="background-decode-toast" style="display:none;"></div>
+          <div class="sch-toast" id="background-decode-toast" role="alert" aria-live="polite" style="display:none;"></div>
           <!-- Now Playing status card (moved to top) -->
           <div class="now-playing-card">
             <div id="background-decode-status-card" class="sch-status-card">No background decode bookmarks configured.</div>
@@ -1273,6 +1273,10 @@
               <label class="sch-label" style="min-width:100%;">Bookmarks
                 <input type="text" id="bgd-bookmark-filter" class="bgd-checklist-filter" placeholder="Filter bookmarks..." />
               </label>
+              <div class="bgd-select-actions">
+                <button type="button" id="bgd-select-all-btn" class="bgd-select-btn" aria-label="Select all bookmarks">Select All</button>
+                <button type="button" id="bgd-deselect-all-btn" class="bgd-select-btn" aria-label="Deselect all bookmarks">Deselect All</button>
+              </div>
               <div id="bgd-bookmark-checklist" class="bgd-checklist"></div>
             </div>
           </div>

src/trx-client/trx-frontend/trx-frontend-http/assets/web/plugins/ais.js

@@ -378,6 +378,7 @@ window.pruneAisHistoryView = function() {
 };
 
 document.getElementById("settings-clear-ais-history")?.addEventListener("click", async () => {
+  if (!confirm("Clear all AIS decode history? This cannot be undone.")) return;
   try {
     await postPath("/clear_ais_decode");
     window.resetAisHistoryView();

src/trx-client/trx-frontend/trx-frontend-http/assets/web/plugins/aprs.js

@@ -438,6 +438,7 @@ window.restoreAprsHistory = function(packets) {
 };
 
 document.getElementById("settings-clear-aprs-history")?.addEventListener("click", async () => {
+  if (!confirm("Clear all APRS decode history? This cannot be undone.")) return;
   try {
     await postPath("/clear_aprs_decode");
     window.resetAprsHistoryView();

src/trx-client/trx-frontend/trx-frontend-http/assets/web/plugins/background-decode.js

@@ -12,6 +12,7 @@
   let currentConfig = null;
   let bookmarkList = [];
   let statusInterval = null;
+  let bgdDirty = false;
 
   function initBackgroundDecode(rigId, role) {
     backgroundDecodeRole = role;
@@ -77,6 +78,7 @@
         currentConfig = config || { remote: rigId, enabled: false, bookmark_ids: [] };
         bookmarkList = Array.isArray(bookmarks) ? bookmarks : [];
         renderBackgroundDecode();
+        clearBgdDirty();
         pollBackgroundDecodeStatus();
       })
       .catch(function (err) {
@@ -175,6 +177,7 @@
     } else if (!checked) {
       currentConfig.bookmark_ids = currentConfig.bookmark_ids.filter(function (id) { return id !== bookmarkId; });
     }
+    markBgdDirty();
   }
 
   function saveBackgroundDecode() {
@@ -191,6 +194,7 @@
       .then(function (saved) {
         currentConfig = saved;
         renderBackgroundDecode();
+        clearBgdDirty();
         pollBackgroundDecodeStatus();
         showToast("Background decode saved.");
       })
@@ -205,10 +209,12 @@
   function resetBackgroundDecode() {
     const rigId = currentRigId;
     if (!rigId) return;
+    if (!confirm("Reset background decode configuration? This cannot be undone.")) return;
     apiResetConfig(rigId)
       .then(function (saved) {
         currentConfig = saved;
         renderBackgroundDecode();
+        clearBgdDirty();
         pollBackgroundDecodeStatus();
         showToast("Background decode reset.");
       })
@@ -272,17 +278,17 @@
 
   function prettyState(state) {
     switch (state) {
-      case "active": return "Active";
+      case "active": return "\u2713 Active";
-      case "out_of_span": return "Out of span";
+      case "out_of_span": return "\u25B3 Out of span";
-      case "waiting_for_spectrum": return "Waiting";
+      case "waiting_for_spectrum": return "\u25B3 Waiting";
-      case "waiting_for_user": return "No user";
+      case "waiting_for_user": return "\u25B3 No user";
-      case "missing_bookmark": return "Missing";
+      case "missing_bookmark": return "\u2717 Missing";
-      case "no_supported_decoders": return "Unsupported";
+      case "no_supported_decoders": return "\u2717 Unsupported";
-      case "disabled": return "Disabled";
+      case "disabled": return "\u25B3 Disabled";
-      case "handled_by_scheduler": return "Scheduler";
+      case "handled_by_scheduler": return "\u25B3 Scheduler";
-      case "scheduler_has_control": return "Scheduler";
+      case "scheduler_has_control": return "\u25B3 Scheduler";
-      case "handled_by_virtual_channel": return "VChan";
+      case "handled_by_virtual_channel": return "\u25B3 VChan";
-      default: return "Inactive";
+      default: return "\u25B3 Inactive";
     }
   }
 
@@ -306,6 +312,19 @@
       .replace(/"/g, """);
   }
 
+  function markBgdDirty() {
+    if (bgdDirty) return;
+    bgdDirty = true;
+    var btn = document.getElementById("background-decode-save-btn");
+    if (btn) btn.classList.add("sch-dirty");
+  }
+
+  function clearBgdDirty() {
+    bgdDirty = false;
+    var btn = document.getElementById("background-decode-save-btn");
+    if (btn) btn.classList.remove("sch-dirty");
+  }
+
   function showToast(msg, isError) {
     const el = document.getElementById("background-decode-toast");
     if (!el) return;
@@ -317,6 +336,25 @@
     }, 3000);
   }
 
+  function selectAllBookmarks() {
+    if (!currentConfig) {
+      currentConfig = { remote: currentRigId, enabled: false, bookmark_ids: [] };
+    }
+    var ids = supportedBookmarks().map(function (bm) { return bm.id; });
+    currentConfig.bookmark_ids = ids;
+    renderBookmarkChecklist(document.getElementById("bgd-bookmark-filter")?.value);
+    markBgdDirty();
+  }
+
+  function deselectAllBookmarks() {
+    if (!currentConfig) {
+      currentConfig = { remote: currentRigId, enabled: false, bookmark_ids: [] };
+    }
+    currentConfig.bookmark_ids = [];
+    renderBookmarkChecklist(document.getElementById("bgd-bookmark-filter")?.value);
+    markBgdDirty();
+  }
+
   function wireBackgroundDecodeEvents() {
     const filterInput = document.getElementById("bgd-bookmark-filter");
     if (filterInput && !filterInput._wired) {
@@ -326,6 +364,24 @@
       });
     }
 
+    const enabledCb = document.getElementById("background-decode-enabled");
+    if (enabledCb && !enabledCb._wired) {
+      enabledCb._wired = true;
+      enabledCb.addEventListener("change", function () { markBgdDirty(); });
+    }
+
+    const selectAllBtn = document.getElementById("bgd-select-all-btn");
+    if (selectAllBtn && !selectAllBtn._wired) {
+      selectAllBtn._wired = true;
+      selectAllBtn.addEventListener("click", selectAllBookmarks);
+    }
+
+    const deselectAllBtn = document.getElementById("bgd-deselect-all-btn");
+    if (deselectAllBtn && !deselectAllBtn._wired) {
+      deselectAllBtn._wired = true;
+      deselectAllBtn.addEventListener("click", deselectAllBookmarks);
+    }
+
     const saveBtn = document.getElementById("background-decode-save-btn");
     if (saveBtn && !saveBtn._wired) {
       saveBtn._wired = true;

src/trx-client/trx-frontend/trx-frontend-http/assets/web/plugins/cw.js

@@ -360,6 +360,7 @@ window.resetCwHistoryView = function() {
 };
 
 document.getElementById("settings-clear-cw-history")?.addEventListener("click", async () => {
+  if (!confirm("Clear all CW decode history? This cannot be undone.")) return;
   try {
     await postPath("/clear_cw_decode");
     window.resetCwHistoryView();

src/trx-client/trx-frontend/trx-frontend-http/assets/web/plugins/ft2.js

@@ -190,6 +190,7 @@ ft2DecodeToggleBtn?.addEventListener("click", async () => {
 });
 
 document.getElementById("settings-clear-ft2-history")?.addEventListener("click", async () => {
+  if (!confirm("Clear all FT2 decode history? This cannot be undone.")) return;
   try {
     await postPath("/clear_ft2_decode");
     window.resetFt2HistoryView();

src/trx-client/trx-frontend/trx-frontend-http/assets/web/plugins/ft4.js

@@ -190,6 +190,7 @@ ft4DecodeToggleBtn?.addEventListener("click", async () => {
 });
 
 document.getElementById("settings-clear-ft4-history")?.addEventListener("click", async () => {
+  if (!confirm("Clear all FT4 decode history? This cannot be undone.")) return;
   try {
     await postPath("/clear_ft4_decode");
     window.resetFt4HistoryView();

src/trx-client/trx-frontend/trx-frontend-http/assets/web/plugins/ft8.js

@@ -458,6 +458,7 @@ ft8DecodeToggleBtn?.addEventListener("click", async () => {
 });
 
 document.getElementById("settings-clear-ft8-history")?.addEventListener("click", async () => {
+  if (!confirm("Clear all FT8 decode history? This cannot be undone.")) return;
   try {
     await postPath("/clear_ft8_decode");
     window.resetFt8HistoryView();

src/trx-client/trx-frontend/trx-frontend-http/assets/web/plugins/hf-aprs.js

@@ -384,6 +384,7 @@ hfAprsDecodeToggleBtn?.addEventListener("click", async () => {
 });
 
 document.getElementById("settings-clear-hf-aprs-history")?.addEventListener("click", async () => {
+  if (!confirm("Clear all HF APRS decode history? This cannot be undone.")) return;
   try {
     await postPath("/clear_hf_aprs_decode");
     window.resetHfAprsHistoryView();

src/trx-client/trx-frontend/trx-frontend-http/assets/web/plugins/sat.js

@@ -278,6 +278,7 @@ satDom.typeFilter?.addEventListener("change", () => renderSatHistoryTable());
 document
   .getElementById("settings-clear-sat-history")
   ?.addEventListener("click", async () => {
+    if (!confirm("Clear all satellite decode history? This cannot be undone.")) return;
     try {
       await postPath("/clear_lrpt_decode");
       window.resetSatHistoryView();

src/trx-client/trx-frontend/trx-frontend-http/assets/web/plugins/scheduler.js

@@ -19,6 +19,7 @@
   let interleaveTicker = null;
   let schedulerStepPending = false;
   let schEntryEditIdx = null;     // null = adding, number = editing that index
+  let schedulerDirty = false;     // true when unsaved changes exist
   // Satellite entry editing state moved to sat-scheduler.js
 
   // -------------------------------------------------------------------------
@@ -127,6 +128,7 @@
         bookmarkList = Array.isArray(bms) ? bms : [];
         populateTsBookmarkSelect();
         renderScheduler();
+        clearSchedulerDirty();
         renderSchedulerInterleaveStatus();
       })
       .catch(function (e) {
@@ -569,6 +571,7 @@
 
     schCloseEntryForm();
     renderTimespanEntries();
+    markSchedulerDirty();
   }
 
   // -------------------------------------------------------------------------
@@ -781,6 +784,7 @@
     if (!currentConfig || !currentConfig.entries) return;
     currentConfig.entries.splice(idx, 1);
     renderTimespanEntries();
+    markSchedulerDirty();
   }
 
   // -------------------------------------------------------------------------
@@ -830,6 +834,7 @@
       .then(function (saved) {
         currentConfig = saved;
         renderScheduler();
+        clearSchedulerDirty();
         showSchedulerToast("Scheduler saved.");
       })
       .catch(function (e) {
@@ -859,6 +864,7 @@
           entries: [],
         };
         renderScheduler();
+        clearSchedulerDirty();
         showSchedulerToast("Scheduler reset.");
       })
       .catch(function (e) {
@@ -866,6 +872,22 @@
       });
   }
 
+  // -------------------------------------------------------------------------
+  // Dirty-state tracking
+  // -------------------------------------------------------------------------
+  function markSchedulerDirty() {
+    if (schedulerDirty) return;
+    schedulerDirty = true;
+    var btn = document.getElementById("scheduler-save-btn");
+    if (btn) btn.classList.add("sch-dirty");
+  }
+
+  function clearSchedulerDirty() {
+    schedulerDirty = false;
+    var btn = document.getElementById("scheduler-save-btn");
+    if (btn) btn.classList.remove("sch-dirty");
+  }
+
   // -------------------------------------------------------------------------
   // Toast helper
   // -------------------------------------------------------------------------
@@ -918,6 +940,21 @@
       schedulerSelectRelativeEntry(1);
     });
 
+    // Dirty-state: mark dirty on any user input/change within the scheduler panel
+    var schPanel = document.getElementById("scheduler-panel");
+    if (schPanel && !schPanel._dirtyWired) {
+      schPanel._dirtyWired = true;
+      schPanel.addEventListener("input", function (e) {
+        // Ignore the entry-form inputs (they don't affect saved config until submitted)
+        if (e.target.closest("#sch-entry-form") || e.target.closest("#sch-sat-form")) return;
+        markSchedulerDirty();
+      });
+      schPanel.addEventListener("change", function (e) {
+        if (e.target.closest("#sch-entry-form") || e.target.closest("#sch-sat-form")) return;
+        markSchedulerDirty();
+      });
+    }
+
     wireExtraBmAdd();
     wireSatelliteEvents();
   }

src/trx-client/trx-frontend/trx-frontend-http/assets/web/plugins/vdes.js

@@ -313,6 +313,7 @@ window.restoreVdesHistory = function(messages) {
 };
 
 document.getElementById("settings-clear-vdes-history")?.addEventListener("click", async () => {
+  if (!confirm("Clear all VDES decode history? This cannot be undone.")) return;
   try {
     await postPath("/clear_vdes_decode");
     window.resetVdesHistoryView();

src/trx-client/trx-frontend/trx-frontend-http/assets/web/plugins/wspr.js

@@ -266,6 +266,7 @@ wsprDecodeToggleBtn?.addEventListener("click", async () => {
 });
 
 document.getElementById("settings-clear-wspr-history")?.addEventListener("click", async () => {
+  if (!confirm("Clear all WSPR decode history? This cannot be undone.")) return;
   try {
     await postPath("/clear_wspr_decode");
     window.resetWsprHistoryView();

src/trx-client/trx-frontend/trx-frontend-http/assets/web/style.css

@@ -4502,6 +4502,21 @@ button:focus-visible, input:focus-visible, select:focus-visible {
   border-color: var(--accent-green);
   font-weight: 700;
 }
+.sch-save-btn.sch-dirty::after {
+  content: "";
+  display: inline-block;
+  width: 7px;
+  height: 7px;
+  border-radius: 50%;
+  background: #fff;
+  margin-left: 0.45rem;
+  vertical-align: middle;
+  animation: sch-dirty-pulse 1.5s ease-in-out infinite;
+}
+@keyframes sch-dirty-pulse {
+  0%, 100% { opacity: 1; }
+  50% { opacity: 0.4; }
+}
 .sch-status-card {
   font-size: 0.9rem;
   color: var(--text-muted);
@@ -4829,6 +4844,26 @@ button:focus-visible, input:focus-visible, select:focus-visible {
   color: var(--text-muted);
   font-size: 0.85rem;
 }
+/* ── Select All / Deselect All buttons ────────────────────────────── */
+.bgd-select-actions {
+  display: flex;
+  gap: 0.5rem;
+}
+.bgd-select-btn {
+  background: var(--bg-secondary);
+  border: 1px solid var(--border-light);
+  border-radius: 0.3rem;
+  color: var(--text-muted);
+  font-size: 0.78rem;
+  font-weight: 600;
+  padding: 0.25rem 0.65rem;
+  cursor: pointer;
+  transition: background 0.15s, color 0.15s;
+}
+.bgd-select-btn:hover {
+  background: var(--card-bg);
+  color: var(--text);
+}
 /* ── SVG State Dot Badges ─────────────────────────────────────────── */
 .bgd-state-dot {
   width: 8px;