feat(pow): move composer PoW button before Subject; switch icon to Manufacturing

The per-post PoW button on the New Post screen now sits before the
Subject/Title toggle instead of last in the options row.

Every PoW surface (composer button, note chip, mining banner, settings tile,
relay-info minimum-PoW row) switches from the Bolt icon to Manufacturing
(gear, U+E726): Bolt is the app's zap/lightning glyph everywhere else, so a
Bolt PoW badge next to the zap-split/zapraiser/invoice buttons read as a
payment feature. Subset font regenerated for the new codepoint.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01ADb3dez9jPk6QqyQ1rTx4V

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/broadcast/BroadcastBanner.kt

@@ -161,10 +161,10 @@ private fun MiningContent(
     miningJobs: ImmutableList<PoWJobState>,
     onCancelJob: (String) -> Unit,
 ) {
-    // one shared pulse for the bolt — mining has no measurable progress, so
+    // one shared pulse for the gear — mining has no measurable progress, so
     // the animation is what says "the app is working right now".
     val pulse = rememberInfiniteTransition(label = "miningPulse")
-    val boltAlpha by pulse.animateFloat(
+    val gearAlpha by pulse.animateFloat(
         initialValue = 0.35f,
         targetValue = 1f,
         animationSpec =
@@ -172,7 +172,7 @@ private fun MiningContent(
                 animation = tween(700),
                 repeatMode = RepeatMode.Reverse,
             ),
-        label = "boltAlpha",
+        label = "gearAlpha",
     )
 
     // 1 Hz clock driving the per-job elapsed labels; only ticks while some
@@ -194,9 +194,9 @@ private fun MiningContent(
             modifier = Modifier.fillMaxWidth(),
         ) {
             Icon(
-                symbol = MaterialSymbols.Bolt,
+                symbol = MaterialSymbols.Manufacturing,
                 contentDescription = stringRes(R.string.pow_mining_title),
-                tint = MaterialTheme.colorScheme.primary.copy(alpha = boltAlpha),
+                tint = MaterialTheme.colorScheme.primary.copy(alpha = gearAlpha),
                 modifier = Modifier.size(18.dp),
             )
 

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/creators/pow/PowOverrideButton.kt

@@ -52,9 +52,10 @@ val POW_PRESETS = listOf(16, 20, 24, 28)
 
 /**
  * Composer options-row button showing the NIP-13 difficulty this post will be
- * mined at: a bolt with the difficulty as a small badge when mining is on,
- * a dimmed bolt when off. Tapping opens a menu to raise/lower/disable mining
- * for this post only — the account setting is untouched.
+ * mined at: a manufacturing gear with the difficulty as a small badge when
+ * mining is on, a dimmed gear when off. Tapping opens a menu to
+ * raise/lower/disable mining for this post only — the account setting is
+ * untouched.
  *
  * [effectiveDifficulty] is what will actually be used at send time (override
  * or account default); null/0 means the post publishes without PoW.
@@ -80,7 +81,7 @@ fun PowOverrideButton(
                     .width(23.dp),
             ) {
                 Icon(
-                    symbol = MaterialSymbols.Bolt,
+                    symbol = MaterialSymbols.Manufacturing,
                     contentDescription = stringRes(R.string.pow_settings_title),
                     modifier = Modifier.size(18.dp).align(Alignment.BottomStart),
                     tint =

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/elements/DisplayPoW.kt

@@ -67,7 +67,7 @@ fun DisplayPoW(pow: Int) {
                 .padding(horizontal = 6.dp, vertical = 1.dp),
     ) {
         Icon(
-            symbol = MaterialSymbols.Bolt,
+            symbol = MaterialSymbols.Manufacturing,
             contentDescription = stringRes(R.string.pow_settings_title),
             tint = MaterialTheme.colorScheme.onSecondaryContainer,
             modifier = Modifier.size(12.dp),

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/home/ShortNotePostScreen.kt

@@ -834,6 +834,13 @@ private fun BottomRowActions(
             }
         }
 
+        PowOverrideButton(
+            effectiveDifficulty = postViewModel.effectivePowDifficulty(),
+            defaultDifficulty = postViewModel.defaultPowDifficulty(),
+            isOverridden = postViewModel.powOverride != null,
+            onSelect = { postViewModel.powOverride = it },
+        )
+
         // A group thread's title is required, so the field is always shown for it — no toggle.
         if (postViewModel.groupThreadTarget == null) {
             AddSubjectButton(postViewModel.wantsSubject) {
@@ -869,13 +876,6 @@ private fun BottomRowActions(
                 postViewModel.wantsInvoice = !postViewModel.wantsInvoice
             }
         }
-
-        PowOverrideButton(
-            effectiveDifficulty = postViewModel.effectivePowDifficulty(),
-            defaultDifficulty = postViewModel.defaultPowDifficulty(),
-            isOverridden = postViewModel.powOverride != null,
-            onSelect = { postViewModel.powOverride = it },
-        )
     }
 }
 

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/relays/RelayInformationScreen.kt

@@ -939,7 +939,7 @@ fun LimitationsCard(lim: Nip11RelayInformation.RelayInformationLimitation) {
                     val minPoW = lim.min_pow_difficulty
 
                     if (minPoW != null && minPoW > 0) {
-                        InfoRow(MaterialSymbols.Bolt, stringRes(R.string.minimum_pow), stringRes(R.string.amount_in_bits, minPoW))
+                        InfoRow(MaterialSymbols.Manufacturing, stringRes(R.string.minimum_pow), stringRes(R.string.amount_in_bits, minPoW))
                     } else {
                         lim.min_prefix?.let {
                             if (it > 0) {

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/settings/ComposeSettingsScreen.kt

@@ -144,7 +144,7 @@ private fun PowDifficultyTile(accountViewModel: AccountViewModel) {
         .collectAsStateWithLifecycle()
 
     SettingsBlockTile(
-        icon = MaterialSymbols.Bolt,
+        icon = MaterialSymbols.Manufacturing,
         title = stringRes(R.string.pow_difficulty_title),
         description = stringRes(R.string.pow_difficulty_explainer),
     ) {

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

@@ -152,6 +152,7 @@ object MaterialSymbols {
     val Lock = MaterialSymbol("\uE899")
     val LockOpen = MaterialSymbol("\uE898")
     val Mail = MaterialSymbol("\uE159")
+    val Manufacturing = MaterialSymbol("\uE726")
     val MenuBook = MaterialSymbol("\uEA19")
     val Mic = MaterialSymbol("\uE31D")
     val MicOff = MaterialSymbol("\uE02B")