Move the server to car.k8s.stinnesbeck.com

The server's host is car.k8s.stinnesbeck.com, not car.stinnesbeck.com:
IngressRoute, PUBLIC_URL (so the pairing QR code points there), the
app's pre-filled server URL and hint, and the docs. Grafana's
placeholder host follows to car-grafana.k8s.stinnesbeck.com, so one
*.k8s.stinnesbeck.com default certificate covers both. App 2.4.1 for the
new default; the server image is unchanged (its URL comes from the
manifest).

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

app/build.gradle

@@ -34,8 +34,8 @@ android {
         applicationId "com.stinnesbeck.nilsmg4"
         minSdk 27
         targetSdk 36
-        versionCode 58
-        versionName "2.4.0"
+        versionCode 59
+        versionName "2.4.1"
 
         // Nothing about the server ships in the APK: its URL and ingest token are entered in
         // the app's Server tab (ServerConfig), and the database is only reachable by the server.

app/src/main/java/com/evsuite/abrp/ConfigImport.java

@@ -7,7 +7,7 @@ package com.evsuite.abrp;
  *
  * <pre>
  *   # Nils' MG4 config
- *   server_url      = https://car.stinnesbeck.com
+ *   server_url      = https://car.k8s.stinnesbeck.com
  *   token           = 0123abcd...            (the server's INGEST_TOKEN)
  *   installation_id = 6f1a2b3c-4d5e-4f60-8a9b-0c1d2e3f4a5b
  *   interval_sec    = 60

app/src/main/java/com/evsuite/abrp/ServerConfig.java

@@ -28,7 +28,7 @@ final class ServerConfig {
             Pattern.CASE_INSENSITIVE);
 
     /** Pre-filled so pairing needs no typing in the car; can still be changed. */
-    static final String DEFAULT_URL = "https://car.stinnesbeck.com";
+    static final String DEFAULT_URL = "https://car.k8s.stinnesbeck.com";
 
     /** The server refuses shorter ingest tokens outright. */
     static final int MIN_TOKEN_LENGTH = 24;

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

@@ -49,7 +49,7 @@
     <!-- Server page -->
     <string name="server_card_title">Car server</string>
     <string name="hint_server_url">Server URL</string>
-    <string name="helper_server_url">For example https://car.stinnesbeck.com</string>
+    <string name="helper_server_url">For example https://car.k8s.stinnesbeck.com</string>
     <string name="hint_server_token">Ingest token</string>
     <string name="helper_server_token">The server\'s INGEST_TOKEN, at least 24 characters</string>
     <string name="hint_installation_id">Installation ID</string>