Revive yaris-obd: USB OBD adapter, real GPS/GNSS, offline map, hotspot, SQLite logging, dashcam retrieval

Squashed rewrite of the project revival work (replaces prior history on this
branch to remove personal data that had been accidentally committed - real
LAN IP, GPS coordinates, home WiFi SSID, and phone model). See PLAN.md for
full phase-by-phase details. Summary:

- Phase 2: adapt app_obd.py for a USB OBD-II adapter (was Bluetooth-only),
  auto-detect /dev/ttyUSB*, fix several pre-existing crash bugs.
- Phase 3/4: make the web UI work fully offline (vendored Socket.IO/Leaflet/
  Chart.js/FontAwesome, offline map tile downloader script, live GPS marker
  tracking fix).
- Phase 5: systemd deployment/autostart on the Pi.
- Phase 6: WiFi hotspot mode via NetworkManager (auto-switch between home
  WiFi and a local AP for in-car web UI access), mDNS hostname + port 80
  redirect so the UI is reachable at a plain hostname with no port number.
- Phase 7: fix app_db.py/app_sql.py bugs, wire up local SQLite trip logging.
- Phase 8: brand-agnostic USB dashcam file retrieval (lsblk transport-based
  detection, works with any dashcam brand/folder layout).
- Rewritten readme.md with a proper project overview.

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

app.py

@@ -1,5 +1,5 @@
-from flask import Flask, render_template, make_response, json
-from modules import app_gps, app_events, app_car, app_account, app_gps,app_obd 
+from flask import Flask, render_template, make_response, json, jsonify
+from modules import app_gps, app_events, app_car, app_account, app_gps,app_obd, app_sql, app_dash
 import time
 from gevent.pywsgi import WSGIServer
 
@@ -10,7 +10,8 @@ app_events.socketio.init_app(app)
 account = app_account.Account()
 obd = app_obd.OBD()
 car = app_car.Car()
-gps = app_gps.get_gps()
+gps = app_gps.start_gps()
+app_sql.start_logging()
 
 @app.route('/')
 def index():
@@ -26,6 +27,16 @@ def dtc():
 def dash():
     return render_template('dash.html', account = account, car = car)
 
+@app.route('/api/dash/devices')
+def dash_devices():
+    devices = app_dash.list_usb_storage_partitions()
+    return jsonify({"devices": devices})
+
+@app.route('/api/dash/import', methods=['POST'])
+def dash_import():
+    summary = app_dash.import_dashcam()
+    return jsonify(summary)
+
 # not sure if im gonna use this
 @app.route('/api/obd_speed/')
 def data():