App 2.12.0, server 2.5.0: enter settings on the phone

The ABRP credentials are long to type on the car. "Enter on phone"
(Live data tab, and Settings next to the charging price) shows a QR
code; it opens a form on the server where the phone sends the ABRP API
key and user token, charging price and usable capacity, confirmed with
the approval password. The car polls with its own token and collects
the values once, then saves them through the same checks as the fields
on screen.

Same device-flow shape as pairing. The server keeps the values in memory
only, at most ten minutes, hands them out once with no-store, and never
logs them or puts them back into the page; a paired token only reaches
its own installation's request. Pairing's QR dialog is now shared
(PhoneQrDialog), and the phone pages share one stylesheet.

The config file also takes charging_price and usable_kwh.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QLJfZQZeAKAwSqViTmLzki

app/src/main/res/layout-w1000dp/pane_service.xml

@@ -19,6 +19,7 @@
                 </com.google.android.material.textfield.TextInputLayout>
                 <com.google.android.material.button.MaterialButton android:id="@+id/abrp_save_button" style="@style/Widget.EV.Button" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/btn_save" android:layout_marginTop="20dp" />
                 <com.google.android.material.button.MaterialButton android:id="@+id/abrp_test_button" style="@style/Widget.EV.Button.Outlined" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/btn_test" android:layout_marginTop="8dp" />
+                <com.google.android.material.button.MaterialButton android:id="@+id/abrp_phone_button" style="@style/Widget.EV.Button.Outlined" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/btn_phone_settings" android:layout_marginTop="8dp" />
                 <TextView android:id="@+id/abrp_status_text" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="12dp" android:textAppearance="@style/Text.EV.Body" />
             </LinearLayout>
         </LinearLayout>

app/src/main/res/layout-w1000dp/pane_settings.xml

@@ -28,6 +28,8 @@
                     <com.google.android.material.textfield.TextInputEditText android:id="@+id/charge_price_input" android:layout_width="match_parent" android:layout_height="wrap_content" android:inputType="numberDecimal" android:maxLength="10" android:minHeight="72dp"/>
                 </com.google.android.material.textfield.TextInputLayout>
                 <com.google.android.material.button.MaterialButton android:id="@+id/charge_price_save" style="@style/Widget.EV.Button" android:layout_width="match_parent" android:layout_height="72dp" android:layout_marginTop="8dp" android:text="Save price"/>
+                <com.google.android.material.button.MaterialButton android:id="@+id/settings_phone_button" style="@style/Widget.EV.Button.Outlined" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/btn_phone_settings" android:layout_marginTop="8dp" />
+                <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="8dp" android:text="@string/hint_phone_settings" android:textAppearance="@style/Text.EV.Secondary" />
             </LinearLayout>
         </LinearLayout>
         <LinearLayout android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:orientation="vertical">

app/src/main/res/layout/pane_service.xml

@@ -18,6 +18,7 @@
             </com.google.android.material.textfield.TextInputLayout>
             <com.google.android.material.button.MaterialButton android:id="@+id/abrp_save_button" style="@style/Widget.EV.Button" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/btn_save" android:layout_marginTop="20dp" />
             <com.google.android.material.button.MaterialButton android:id="@+id/abrp_test_button" style="@style/Widget.EV.Button.Outlined" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/btn_test" android:layout_marginTop="8dp" />
+            <com.google.android.material.button.MaterialButton android:id="@+id/abrp_phone_button" style="@style/Widget.EV.Button.Outlined" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/btn_phone_settings" android:layout_marginTop="8dp" />
             <TextView android:id="@+id/abrp_status_text" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="12dp" android:textAppearance="@style/Text.EV.Body" />
         </LinearLayout>
         <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" android:padding="24dp" android:background="@drawable/bg_glass" android:layout_marginTop="16dp">

app/src/main/res/layout/pane_settings.xml

@@ -27,6 +27,8 @@
                 <com.google.android.material.textfield.TextInputEditText android:id="@+id/charge_price_input" android:layout_width="match_parent" android:layout_height="wrap_content" android:inputType="numberDecimal" android:maxLength="10" android:minHeight="72dp"/>
             </com.google.android.material.textfield.TextInputLayout>
             <com.google.android.material.button.MaterialButton android:id="@+id/charge_price_save" style="@style/Widget.EV.Button" android:layout_width="match_parent" android:layout_height="72dp" android:layout_marginTop="8dp" android:text="Save price"/>
+            <com.google.android.material.button.MaterialButton android:id="@+id/settings_phone_button" style="@style/Widget.EV.Button.Outlined" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/btn_phone_settings" android:layout_marginTop="8dp" />
+            <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="8dp" android:text="@string/hint_phone_settings" android:textAppearance="@style/Text.EV.Secondary" />
         </LinearLayout>
         <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" android:padding="24dp" android:background="@drawable/bg_glass" android:layout_marginTop="16dp">
             <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/wifi_card_title" android:textAppearance="@style/Text.EV.Eyebrow" />

app/src/main/res/values/strings.xml

@@ -100,6 +100,7 @@
     <string name="import_ok_deleted">Config imported and saved; the file was deleted</string>
     <string name="import_ok_not_deleted">Config imported and saved, but the file could not be deleted. It holds your token: delete %1$s</string>
     <string name="import_err_read">Could not read that file</string>
+    <string name="import_err_values">The charging price or usable capacity in the file is not plausible</string>
     <string name="import_err_empty">No settings found in that file</string>
     <string name="import_err_not_found">No config file found. Copy it to %1$s</string>
 
@@ -134,6 +135,16 @@
     <string name="abrp_test_failed">ABRP refused: HTTP %1$d</string>
     <string name="abrp_test_offline">ABRP not reachable: %1$s</string>
     <string name="abrp_not_set">Set both first</string>
+    <string name="btn_phone_settings">Enter on phone</string>
+    <string name="hint_phone_settings">Type the ABRP credentials, charging price and usable capacity on your phone instead: a QR code opens a form on your server.</string>
+    <string name="phone_settings_title">Enter settings on your phone</string>
+    <string name="phone_settings_scan">Scan the QR code with your phone, or open %1$s and enter the code %2$s. Fill in what you want to change and send it with the approval password.</string>
+    <string name="phone_settings_waiting">Waiting for the phone…</string>
+    <string name="phone_settings_needs_server">Set up the server first (Server tab): the form for the phone runs on your server.</string>
+    <string name="phone_settings_not_enabled">Not available on the server: it needs version 2.5.0 or newer and an APPROVAL_PASSWORD</string>
+    <string name="pair_expired_settings">The code expired — press Enter on phone again</string>
+    <string name="phone_settings_applied">Settings from the phone saved</string>
+    <string name="phone_settings_partly">Some values from the phone were not plausible and were not saved</string>
 
 
     <!-- Cadence configuration -->