Add program reminders and category filtering to the guide UI

Enhance health diagnostics with EPG quality and source metrics

src/js/utils.js

@@ -10,6 +10,7 @@ let channels = [];
 let programs = {};
 let m3uStreams = {}; // Normalized slug -> stream URL.
 let scrollListenerAdded = false; // Keeps the channel column vertically synced with the timeline.
+let availableCategories = [];
 
 function pad(n) { return String(n).padStart(2,'0'); }
 
@@ -123,6 +124,27 @@ function formatCategories(categories) {
   return Array.isArray(categories) && categories.length ? categories.join(' · ') : '';
 }
 
+function normalizeCategory(value) {
+  return String(value || '').trim().toLowerCase();
+}
+
+function collectAvailableCategories() {
+  const seen = new Set();
+  const list = [];
+  Object.values(programs).forEach(items => {
+    items.forEach(program => {
+      (program.categories || []).forEach(category => {
+        const label = String(category || '').trim();
+        const key = normalizeCategory(label);
+        if (!label || seen.has(key)) return;
+        seen.add(key);
+        list.push(label);
+      });
+    });
+  });
+  availableCategories = list.sort((a, b) => a.localeCompare(b, undefined, { sensitivity: 'base' }));
+}
+
 function parseAirDate(value) {
   if (!value) return null;
   const match = String(value).trim().match(/^(\d{4})/);
@@ -162,11 +184,22 @@ function parseAndRender(doc) {
   });
   Object.keys(programs).forEach(id => programs[id].sort((a,b) => a.start - b.start));
 
+  collectAvailableCategories();
+  if (typeof refreshCategoryFilterOptions === 'function') refreshCategoryFilterOptions();
   renderAll();
+  if (typeof refreshReminderSchedules === 'function') refreshReminderSchedules();
   startLiveUpdates();
 }
 
-function renderAll() {
+function renderUnfiltered() {
   if (isMobile()) { renderMobile(); }
   else { renderGrid(); setTimeout(centerNow, 150); }
 }
+
+function renderAll() {
+  if (typeof applyFilters === 'function') {
+    applyFilters();
+    return;
+  }
+  renderUnfiltered();
+}