feat(videos): add manual Convert button per MOV file on Pi

- New POST /api/local-video/convert route triggers queue_convert(force=True)
- queue_convert() now returns True/False/None and accepts force param
  to bypass the auto-convert toggle (manual always works)
- Convert button shown for non-MP4, non-converting files in video list
- Clicking spins the button and refreshes list after 1s to show badge

Co-authored-by: Copilot <[email protected]>

static/js/local-videos.js

@@ -172,6 +172,16 @@
             playButton.innerHTML = '<i class="fas fa-play"></i><span class="btn-label"> Play</span>';
             actionsDiv.appendChild(playButton);
 
+            // Convert button — only for non-MP4 files not already converting
+            if (!file.converting && !file.path.toLowerCase().endsWith(".mp4")) {
+                const convertButton = document.createElement("button");
+                convertButton.type = "button";
+                convertButton.className = "btn btn-sm btn-outline-secondary btn-icon-mobile";
+                convertButton.dataset.convertPath = file.path;
+                convertButton.innerHTML = '<i class="fas fa-exchange-alt"></i><span class="btn-label"> Convert</span>';
+                actionsDiv.appendChild(convertButton);
+            }
+
             const deleteButton = document.createElement("button");
             deleteButton.type = "button";
             deleteButton.className = "btn btn-sm btn-outline-danger btn-icon-mobile";
@@ -238,6 +248,22 @@
             deleteVideo(deleteButton.dataset.deleteLocalPath).finally(function () {
                 deleteButton.disabled = false;
             });
+            return;
+        }
+        const convertButton = event.target.closest("[data-convert-path]");
+        if (convertButton) {
+            convertButton.disabled = true;
+            convertButton.innerHTML = '<i class="fas fa-spinner fa-spin"></i>';
+            fetch("/api/local-video/convert", {
+                method: "POST",
+                headers: { "Content-Type": "application/json" },
+                body: JSON.stringify({ path: convertButton.dataset.convertPath }),
+            }).then(function () {
+                setTimeout(refreshFiles, 1000);
+            }).catch(function (err) {
+                summary.textContent = `Convert failed: ${err.message}`;
+                convertButton.disabled = false;
+            });
         }
     });