Phone App: add Charging screen + Settings integration tabs

Brings the Flutter app to parity with the recent Web App changes, which
touched features the Phone App did not yet have — so this builds the
Charging and Integrations subsystems, then applies the tab/fold structure.

Charging (new nav destination): split into "Public chargers" (stylized
discovery map + demo session + nearby public stations) and "Home chargers"
(the real Anker Solix OCPP control card — serial refresh, connector/energy
tiles, start/stop, current limit, password step-up on reset — plus the
user's home charger list). Gated by the per-user control mode, degrading to
a Settings hint when off.

Settings: split into "Personal settings" (the existing account/appearance/
profile/security/privacy/danger sections) and "Integrations". The latter
holds foldable Toyota and Anker Solix cards over the superadmin -> org ->
user cascade: locked fields with "inherited from" notes, org-admin scope
switch, enable toggle, save/test with health result, and Anker OCPP token
provisioning. Both tabs stay mounted (IndexedStack) so in-flight edits
survive a switch.

Adds the integration + OCPP control endpoints to api.dart, the resolved
IntegrationView/Scope/Field, IntegrationHealth and AnkerControl models, and
charging.*/settings.tabs.*/nav.charging strings (en/pl/da) plus
settings.integrations.* (en) — mirroring the Web App's own pl/da coverage,
which leaves integrations and charger control untranslated as an English
fallback.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Phone App/assets/i18n/en.json

@@ -13,6 +13,7 @@
 
   "nav": {
     "garage": "Garage",
+    "charging": "Charging",
     "settings": "Settings",
     "users": "Users"
   },
@@ -76,9 +77,123 @@
     }
   },
 
+  "charging": {
+    "eyebrow": "CHARGING & MAP",
+    "title": "Nearby chargers",
+    "tabs": {
+      "public": "Public chargers",
+      "home": "Home chargers"
+    },
+    "liveMap": "Live map",
+    "youAreHere": "You are here",
+    "session": {
+      "chargingNow": "Charging now",
+      "rate": "Rate",
+      "added": "Added",
+      "cost": "Cost",
+      "done": "Done",
+      "stop": "Stop charging",
+      "idle": "Not charging",
+      "idleHint": "Plug in at a station to start a session."
+    },
+    "control": {
+      "title": "Charger control",
+      "connected": "Connected",
+      "disconnected": "Offline",
+      "serialPlaceholder": "Charger serial (e.g. A5191-XXXXXXXX)",
+      "refresh": "Refresh",
+      "status": "Connector",
+      "meter": "Energy",
+      "start": "Start charging",
+      "stop": "Stop charging",
+      "limit": "Current limit",
+      "applyLimit": "Apply limit",
+      "clearLimit": "Clear limit",
+      "reset": "Reset charger",
+      "resetConfirm": "Reboot this charger now? Any active charging session will be interrupted. Re-enter your password to confirm.",
+      "resetPassword": "Your account password",
+      "connectHint": "Enter your charger's serial and refresh. The charger must be connected to DriverVault's OCPP backend (set up in Settings → Integrations)."
+    },
+    "stations": {
+      "heading": "Nearby",
+      "homeHeading": "Your chargers",
+      "noControlHint": "Turn on Own or Proxy CSMS in Settings → Integrations to control your home charger here.",
+      "count": {
+        "one": "{n} station",
+        "other": "{n} stations"
+      },
+      "free": "{avail} of {total} free",
+      "full": "Full",
+      "offPeak": "off-peak",
+      "homeCharger": "Home charger"
+    }
+  },
+
   "settings": {
     "title": "Settings",
 
+    "tabs": {
+      "personal": "Personal settings",
+      "integrations": "Integrations"
+    },
+
+    "integrations": {
+      "title": "Integrations",
+      "subtitle": "Connect external services to your account.",
+      "toyota": "Toyota Connected (MyToyota)",
+      "toyotaDesc": "Sign in with your MyToyota account to pull vehicle data from Toyota Connected Europe. Europe only.",
+      "enable": "Enable for my account",
+      "enableOrg": "Enable for the organization",
+      "unavailable": "This integration is turned off by the administrator.",
+      "orgDisabled": "This integration is turned off for your organization.",
+      "scopeMy": "My settings",
+      "scopeOrg": "Organization",
+      "scopeHint": "Organization settings apply to everyone in your organization who leaves a field blank.",
+      "readOnly": "You manage this integration's shared settings in the API Server panel; here it is read-only.",
+      "email": "MyToyota email",
+      "password": "MyToyota password",
+      "brand": "Brand",
+      "brandToyota": "Toyota",
+      "brandLexus": "Lexus",
+      "inherited": "Set above your level",
+      "inheritedFrom": "Inherited from {source}",
+      "sourceGlobal": "the administrator",
+      "sourceOrg": "your organization",
+      "sourceUser": "you",
+      "passwordKeep": "Leave blank to keep the saved password.",
+      "test": "Test connection",
+      "testing": "Testing…",
+      "save": "Save",
+      "saved": "Saved ✓",
+      "connected": "Connected",
+      "notConnected": "Not connected",
+      "ankerSolix": "Anker Solix (V1 Smart EV Charger)",
+      "ankerSolixDesc": "Sign in with your Anker account to pull EV charger data from the Anker Solix cloud.",
+      "ankerEmail": "Anker account email",
+      "ankerPassword": "Anker account password",
+      "country": "Country",
+      "countryHint": "Two-letter country code of your Anker account (e.g. DE, GB, US).",
+      "controlMode": "Control mode",
+      "controlModeHint": "How DriverVault controls the charger over OCPP.",
+      "controlOff": "Off (monitoring only)",
+      "controlOwn": "Own CSMS (full control)",
+      "controlProxy": "Proxy CSMS (relay + control)",
+      "controlTitle": "Charger control (OCPP)",
+      "controlOwnHint": "The charger connects directly to DriverVault as its Central System. Point the charger's OCPP backend at the endpoint below.",
+      "controlProxyHint": "DriverVault relays to Anker's cloud and can inject commands. Point the charger's OCPP backend at the endpoint below.",
+      "controlProvisionSteps": "In the Anker app (or the charger's OCPP settings), set the OCPP backend URL to the endpoint and the authorization key to the token above.",
+      "chargerSerial": "Charger serial",
+      "controlCheck": "Check status",
+      "controlGenerate": "Generate token",
+      "controlEndpoint": "OCPP endpoint",
+      "controlToken": "Auth token",
+      "controlTokenOnce": "Copy this token now — it's shown only once and can't be retrieved later.",
+      "controlRevoke": "Revoke token",
+      "controlRevokeConfirm": "Revoke this charger's control token? It will disconnect and can't reconnect until you generate a new one.",
+      "controlConnected": "Connected to control backend",
+      "controlDisconnected": "Not connected"
+    },
+
     "account": {
       "title": "Account",
       "name": "Name",