feat(icons): swap post + incognito_off drawables for Material Symbols

- BookmarkGroupItem: replace R.drawable.post with MaterialSymbols.News
  (codepoint U+E032). Drop now-unused post.xml.
- IncognitoBadge: drop the NIP-17 "encrypted" indicator (encryption is the
  expected default; no need to flag) and replace the legacy NIP-04
  unencrypted indicator with MaterialSymbols.NoEncryption (U+F03F).
  Drop now-unused incognito_off.xml.

incognito.xml is kept — still used by the "post anonymously" toggle in
ToggleNip17Button, GenericCommentPostScreen, and ShortNotePostScreen.

https://claude.ai/code/session_016gV9gEaSud6kDMdcaqy8ti

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/bookmarkgroups/list/BookmarkGroupItem.kt

@@ -43,7 +43,6 @@ import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.text.font.FontStyle
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextOverflow
@@ -172,7 +171,7 @@ private fun BookmarkGroupActions(
             onClick = openPostBookmarks,
         ) {
             Icon(
-                painter = painterResource(R.drawable.post),
+                symbol = MaterialSymbols.News,
                 contentDescription = null,
             )
             Text(stringRes(R.string.bookmark_list_posts_btn_label))
@@ -212,7 +211,7 @@ fun BookmarkMembershipStatusAndNumberDisplay(
                     horizontalArrangement = SpacedBy2dp,
                 ) {
                     Icon(
-                        painter = painterResource(R.drawable.post),
+                        symbol = MaterialSymbols.News,
                         modifier = Size10Modifier,
                         contentDescription = null,
                     )

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/chats/privateDM/IncognitoBadge.kt

@@ -21,32 +21,22 @@
 package com.vitorpamplona.amethyst.ui.screen.loggedIn.chats.privateDM
 
 import androidx.compose.foundation.layout.Spacer
-import androidx.compose.material3.Icon
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.runtime.Composable
-import com.vitorpamplona.amethyst.R
+import com.vitorpamplona.amethyst.commons.icons.symbols.Icon
+import com.vitorpamplona.amethyst.commons.icons.symbols.MaterialSymbols
 import com.vitorpamplona.amethyst.model.Note
-import com.vitorpamplona.amethyst.ui.painterRes
 import com.vitorpamplona.amethyst.ui.theme.IncognitoIconModifier
 import com.vitorpamplona.amethyst.ui.theme.StdHorzSpacer
 import com.vitorpamplona.amethyst.ui.theme.placeholderText
 import com.vitorpamplona.quartz.nip04Dm.messages.PrivateDmEvent
-import com.vitorpamplona.quartz.nip17Dm.base.NIP17Group
 
 @Composable
 fun IncognitoBadge(baseNote: Note) {
-    if (baseNote.event is NIP17Group) {
+    if (baseNote.event is PrivateDmEvent) {
         Icon(
-            painter = painterRes(resourceId = R.drawable.incognito, 1),
-            null,
-            modifier = IncognitoIconModifier,
-            tint = MaterialTheme.colorScheme.placeholderText,
-        )
-        Spacer(modifier = StdHorzSpacer)
-    } else if (baseNote.event is PrivateDmEvent) {
-        Icon(
-            painter = painterRes(resourceId = R.drawable.incognito_off, 1),
-            null,
+            symbol = MaterialSymbols.NoEncryption,
+            contentDescription = null,
             modifier = IncognitoIconModifier,
             tint = MaterialTheme.colorScheme.placeholderText,
         )

amethyst/src/main/res/drawable/incognito_off.xml

@@ -1,9 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="24dp"
-    android:height="24dp"
-    android:viewportWidth="24"
-    android:viewportHeight="24">
-  <path
-      android:fillColor="#FF000000"
-      android:pathData="m22.11,21.46 l-19.72,-19.73 -1.28,1.27 5.2,5.2 -0.31,0.8h1.11l1.5,1.5h-6.61v1.5h8.11l3.39,3.37c-0.12,0.24 -0.2,0.48 -0.26,0.73 -0.95,-0.41 -1.83,-0.3 -2.48,-0.01 -0.41,-1.78 -1.97,-3.09 -3.82,-3.09 -2.17,0 -3.94,1.79 -3.94,4s1.77,4 3.94,4c2.06,0 3.74,-1.62 3.9,-3.68 0.34,-0.24 1.23,-0.69 2.32,0.02 0.18,2.05 1.84,3.66 3.9,3.66 0.6,0 1.16,-0.14 1.66,-0.39l2.12,2.12zM6.94,19.86c-1.56,0 -2.81,-1.28 -2.81,-2.86s1.26,-2.86 2.81,-2.86c1.56,0 2.81,1.28 2.81,2.86s-1.25,2.86 -2.81,2.86m10.12,0c-1.56,0 -2.81,-1.28 -2.81,-2.86 0,-0.26 0.04,-0.5 0.11,-0.75l3.48,3.48c-0.25,0.08 -0.5,0.13 -0.78,0.13m4.94,-7.86h-6.8l-1.5,-1.5h8.3zM17.06,13c2.17,0 3.94,1.79 3.94,4 0,0.25 -0.03,0.5 -0.07,0.73l-1.09,-1.09c-0.16,-1.3 -1.18,-2.32 -2.46,-2.47l-1.09,-1.08c0.25,-0.06 0.51,-0.09 0.77,-0.09m-4.86,-4 l-4.48,-4.5 0.71,-1.82c0.2,-0.51 0.76,-0.79 1.29,-0.64l0.05,0.01 2.23,0.74 2.22,-0.74c0.53,-0.17 1.1,0.09 1.32,0.58l0.02,0.05 2.44,6.32z"/>
-</vector>

amethyst/src/main/res/drawable/post.xml

@@ -1 +0,0 @@
-<!-- drawable/post.xml --><vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="24dp" android:width="24dp" android:viewportWidth="24" android:viewportHeight="24"><path android:fillColor="#000000" android:pathData="M3 3V21H21V3H3M18 18H6V17H18V18M18 16H6V15H18V16M18 12H6V6H18V12Z" /></vector>

commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/icons/symbols/MaterialSymbols.kt

@@ -142,6 +142,8 @@ object MaterialSymbols {
     val MoreVert = MaterialSymbol("\uE5D4")
     val MoveToInbox = MaterialSymbol("\uE168")
     val MusicNote = MaterialSymbol("\uE405")
+    val News = MaterialSymbol("\uE032")
+    val NoEncryption = MaterialSymbol("\uF03F")
     val Notifications = MaterialSymbol("\uE7F5")
     val Numbers = MaterialSymbol("\uEAC7")
     val OpenInBrowser = MaterialSymbol("\uE89D")