feat(dashcam): mobile layout fix + optional hw-encode conversion on import

- yaris.css: on mobile (<576px) hide file/size/date/upload cols, show
  filename inside thumb cell, icon-only buttons, dash-actions-td nowrap
- local-videos.js: filename in thumb cell for mobile; Converting badge with
  spinner; auto-refresh every 10s while any file is converting
- app_video.py: CONVERT_SETTING, is_convert_enabled(), queue_convert(),
  _convert_bg() — h264_v4l2m2m + aac faststart, deletes original on success
- app_dash.py: call queue_convert() after each successful copy on import
- app_settings.py: expose video_convert_enabled in get/save settings
- settings.html: toggle for 'Convert imported videos for web playback'

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

modules/app_settings.py

@@ -38,6 +38,7 @@ def get_settings():
     return {
         "dashcam_upload_enabled": app_upload.is_dashcam_upload_enabled(),
         "local_video_retention_days": app_video.retention_days(),
+        "video_convert_enabled": app_video.is_convert_enabled(),
         "cellular_enabled": _setting_bool(
             "cellular_enabled", "YARIS_CELLULAR_ENABLED"
         ),
@@ -98,6 +99,7 @@ def update_settings(body):
     values = {}
     for field in (
         "dashcam_upload_enabled",
+        "video_convert_enabled",
         "cellular_enabled",
         "ntfy_enabled",
         "clear_ntfy_url",
@@ -182,9 +184,8 @@ def update_settings(body):
         app_upload.DASHCAM_UPLOAD_SETTING_KEY: (
             "1" if values["dashcam_upload_enabled"] else "0"
         ),
-        app_video.RETENTION_SETTING: str(
-            values["local_video_retention_days"]
-        ),
+        app_video.RETENTION_SETTING: str(values["local_video_retention_days"]),
+        app_video.CONVERT_SETTING: "1" if values["video_convert_enabled"] else "0",
         "cellular_enabled": "1" if values["cellular_enabled"] else "0",
         "cellular_apn": apn,
         "alerts_enabled": "1" if values["ntfy_enabled"] else "0",