feat: make all maps tappable to open external map app

- Dashboard location card: opens geo: URI at car coordinates
- Drive detail map: opens Google Maps with route from start to end
- Charge detail map: opens geo: URI at charge location
- Dashboard now shows coordinates when car is not at a saved location

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/src/main/java/com/matedroid/ui/screens/charges/ChargeDetailScreen.kt

@@ -1,7 +1,10 @@
 package com.matedroid.ui.screens.charges
 
+import android.content.Intent
 import android.graphics.Paint
+import android.net.Uri
 import androidx.compose.foundation.Canvas
+import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
@@ -369,8 +372,16 @@ private fun LocationHeaderCard(detail: ChargeDetail) {
 private fun ChargeMapCard(latitude: Double, longitude: Double) {
     val context = LocalContext.current
 
+    fun openInMaps() {
+        val geoUri = Uri.parse("geo:$latitude,$longitude?q=$latitude,$longitude")
+        val intent = Intent(Intent.ACTION_VIEW, geoUri)
+        context.startActivity(intent)
+    }
+
     Card(
-        modifier = Modifier.fillMaxWidth(),
+        modifier = Modifier
+            .fillMaxWidth()
+            .clickable { openInMaps() },
         colors = CardDefaults.cardColors(
             containerColor = MaterialTheme.colorScheme.surface
         )

app/src/main/java/com/matedroid/ui/screens/drives/DriveDetailScreen.kt

@@ -1,8 +1,11 @@
 package com.matedroid.ui.screens.drives
 
+import android.content.Intent
 import android.graphics.Color as AndroidColor
 import android.graphics.Paint
+import android.net.Uri
 import androidx.compose.foundation.Canvas
+import androidx.compose.foundation.clickable
 import androidx.compose.foundation.background
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
@@ -358,8 +361,27 @@ private fun DriveMapCard(positions: List<DrivePosition>) {
 
     if (validPositions.isEmpty()) return
 
+    val startPoint = validPositions.firstOrNull()
+    val endPoint = validPositions.lastOrNull()
+
+    fun openInMaps() {
+        if (startPoint != null && endPoint != null) {
+            // Open Google Maps with directions from start to end
+            val uri = Uri.parse(
+                "https://www.google.com/maps/dir/?api=1" +
+                        "&origin=${startPoint.latitude},${startPoint.longitude}" +
+                        "&destination=${endPoint.latitude},${endPoint.longitude}" +
+                        "&travelmode=driving"
+            )
+            val intent = Intent(Intent.ACTION_VIEW, uri)
+            context.startActivity(intent)
+        }
+    }
+
     Card(
-        modifier = Modifier.fillMaxWidth(),
+        modifier = Modifier
+            .fillMaxWidth()
+            .clickable { openInMaps() },
         colors = CardDefaults.cardColors(
             containerColor = MaterialTheme.colorScheme.surface
         )