Add Pi-side upload client for Phase 9 remote server

- app_sql.py: add UPLOADED column + migration on tracking table, add
  settings and dashcam_uploads tables, add helpers for unsent-row
  queries, marking rows uploaded, and dashcam upload dedupe tracking.
- app_upload.py: new background upload client. Periodically batches
  unsent tracking rows to POST /api/v1/tracking/batch and uploads new
  dashcam files (sha256-verified) to POST /api/v1/dashcam/upload, with
  exponential backoff on failure. Exposes get_status() and a
  dashcam-upload enable/disable toggle backed by the settings table.
- app.py: start the upload client thread at startup, add
  GET /api/upload/status and POST /api/upload/dashcam_toggle routes.
- dash.html/dash.js: add a "Remote server upload" card with upload
  status and a toggle switch to pause dashcam video uploads while
  trip/GPS log uploads keep running (per user request - useful on a
  slow/metered connection).
- db/upload_creds.env: new gitignore-exempted template (mirrors
  db/creds.env) for YARIS_SERVER_URL/YARIS_DEVICE_NAME/YARIS_API_KEY.
- requirements.txt: add requests.

Tested against the real deployed unraid server: tracking batch upload
+ dedupe, dashcam upload + dedupe, and toggle-off correctly pausing
dashcam uploads while tracking uploads continue. Also verified the
full Flask app imports/runs cleanly and the new API routes + dash.html
toggle render correctly in a headless browser.

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

static/js/dash.js

@@ -63,3 +63,54 @@ importBtn.addEventListener('click', importDashcam);
 
 // Auto-scan once when the page loads.
 scanForDashcam();
+
+// --- 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_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);