Location notes (#482)

* try 1

* works

* equalize UI with ios

* ui cleanup

* geohash chats: no building

* load notes in background

* insta

* simplify and tor icon change

* icons nice

* refactor

* unify location enabled / disabled

* cooler

* simplify, doesnt subscribe right away

* load when clicked

* plus minus location notes

* load when tor is available

* translations

* fix transalations

* implement review comments

app/src/main/java/com/bitchat/android/ui/LocationNotesButton.kt

@@ -0,0 +1,67 @@
+package com.bitchat.android.ui
+
+import androidx.compose.foundation.layout.size
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.outlined.Description
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.livedata.observeAsState
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.unit.dp
+import com.bitchat.android.R
+import com.bitchat.android.geohash.ChannelID
+import com.bitchat.android.geohash.LocationChannelManager
+import com.bitchat.android.nostr.LocationNotesManager
+
+/**
+ * Location Notes button component for MainHeader
+ * Shows in mesh mode when location permission granted AND services enabled
+ * Icon turns primary color when notes exist, gray otherwise
+ */
+@Composable
+fun LocationNotesButton(
+    viewModel: ChatViewModel,
+    onClick: () -> Unit,
+    modifier: Modifier = Modifier
+) {
+    val colorScheme = MaterialTheme.colorScheme
+    val context = LocalContext.current
+    
+    // Get channel and permission state
+    val selectedLocationChannel by viewModel.selectedLocationChannel.observeAsState()
+    val locationManager = remember { LocationChannelManager.getInstance(context) }
+    val permissionState by locationManager.permissionState.observeAsState()
+    val locationServicesEnabled by locationManager.locationServicesEnabled.observeAsState(false)
+
+    // Check both permission AND location services enabled
+    val locationPermissionGranted = permissionState == LocationChannelManager.PermissionState.AUTHORIZED
+    val locationEnabled = locationPermissionGranted && locationServicesEnabled
+    
+    // Get notes count from LocationNotesManager
+    val notesManager = remember { LocationNotesManager.getInstance() }
+    val notes by notesManager.notes.observeAsState(emptyList())
+    val notesCount = notes.size
+
+    // Only show in mesh mode when location is authorized (iOS pattern)
+    if (selectedLocationChannel is ChannelID.Mesh && locationEnabled) {
+        val hasNotes = notesCount > 0
+        IconButton(
+            onClick = onClick,
+            modifier = modifier.size(24.dp)
+        ) {
+            Icon(
+                imageVector = Icons.Outlined.Description, // "long.text.page.and.pencil" equivalent
+                contentDescription = stringResource(R.string.cd_location_notes),
+                modifier = Modifier.size(16.dp),
+                tint = if (hasNotes) colorScheme.primary else Color.Gray
+            )
+        }
+    }
+}