implement caching for TeslaCam directory scan and add refresh endpoint

templates/index.html

@@ -1029,18 +1029,31 @@
           }
         });
 
-        // Auto-play next clip when video finishes
+        // Auto-play next clip of the same camera when video finishes
         player.addEventListener("ended", function () {
-          const list = getFiltered();
-          const i = list.findIndex(function (c) {
+          if (!current) return;
+          // Build a list of clips for the SAME camera, sorted like the sidebar
+          const sameCam = clips
+            .filter(function (c) {
+              return c.cam === current.cam;
+            })
+            .sort(function (a, b) {
+              if (sortMode === "name")
+                return a.filename.localeCompare(b.filename);
+              const da = tsToDate(a.timestamp),
+                db = tsToDate(b.timestamp);
+              const ta = da ? da.getTime() : 0,
+                tb = db ? db.getTime() : 0;
+              return sortMode === "oldest" ? ta - tb : tb - ta;
+            });
+          const i = sameCam.findIndex(function (c) {
             return (
-              current &&
               c.cam === current.cam &&
               c.timestamp === current.timestamp &&
               c.filename === current.filename
             );
           });
-          if (i > -1 && list[i + 1]) playClip(list[i + 1]);
+          if (i > -1 && sameCam[i + 1]) playClip(sameCam[i + 1]);
         });
 
         render();