Add local settings management

Add cellular-first ntfy delivery with WiFi fallback and safe SIM868 HTTP header framing.

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

static/js/dash.js

@@ -285,59 +285,3 @@ scanForDashcam();
 refreshDashcamFiles();
 
 // --- Remote server upload status/toggle ---
-
-const uploadStatusEl = document.getElementById('upload-status');
-const dashcamToggle = document.getElementById('dashcam-upload-toggle');
-
-function describeUploadStatus(status) {
-    if (!status.configured) {
-        return 'Remote server not configured on this device (see db/upload_creds.env).';
-    }
-    let text = `Pending trip-log rows to upload: ${status.pending_tracking_rows}.`;
-    if (status.last_success_at) {
-        text += ` Last successful upload: ${status.last_success_at}`;
-        if (status.last_network_path) {
-            text += ` (via ${status.last_network_path === 'cellular' ? 'cellular fallback' : 'WiFi/Ethernet'})`;
-        }
-        text += '.';
-    }
-    if (status.cellular_fallback_configured) {
-        text += ' Cellular (SIM868) fallback is enabled for trip logs if WiFi/Ethernet is unreachable.';
-    }
-    if (status.last_error) {
-        text += ` Last error: ${status.last_error}.`;
-    }
-    return text;
-}
-
-function refreshUploadStatus() {
-    fetch('/api/upload/status')
-        .then(response => response.json())
-        .then(status => {
-            uploadStatusEl.textContent = describeUploadStatus(status);
-            dashcamToggle.checked = status.dashcam_upload_enabled;
-            dashcamToggle.disabled = !status.configured;
-        })
-        .catch(err => {
-            uploadStatusEl.textContent = 'Error while checking upload status: ' + err;
-        });
-}
-
-dashcamToggle.addEventListener('change', () => {
-    fetch('/api/upload/dashcam_toggle', {
-        method: 'POST',
-        headers: { 'Content-Type': 'application/json' },
-        body: JSON.stringify({ enabled: dashcamToggle.checked }),
-    })
-        .then(response => response.json())
-        .then(status => {
-            uploadStatusEl.textContent = describeUploadStatus(status);
-            dashcamToggle.checked = status.dashcam_upload_enabled;
-        })
-        .catch(err => {
-            uploadStatusEl.textContent = 'Error while updating toggle: ' + err;
-        });
-});
-
-refreshUploadStatus();
-setInterval(refreshUploadStatus, 15000);