feat(coach): Instagram-style voice recording bar

Beim Aufnehmen ersetzt jetzt eine volle Pill-Bar die Eingabe:
  - Links: Trash-Icon (neutral, dezent)
  - Mitte: Live-Dot (brandOrange) + animierte Waveform-Bars + Timer
  - Rechts: Senden-Button (brandOrange, Pfeil-Icon)

Keine roten Farben mehr, kein separater Mic-Button beim Aufnehmen.
Mic-Button verschwindet komplett während Recording (erst wieder
sichtbar wenn aufgehört). Konsistent mit Rebreak-Farbschema.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/rebreak-native/app/lyra.tsx

@@ -652,15 +652,36 @@ export default function CoachScreen() {
         {/* Input bar */}
         <View style={[styles.inputBar, { paddingBottom: keyboardHeight > 0 ? 8 : Math.max(12, insets.bottom), backgroundColor: colors.bg, borderTopColor: colors.border }]}>
           {isRecording ? (
-            <View style={styles.recordingContainer}>
-              <TouchableOpacity style={styles.cancelBtn} onPress={cancelRecording} activeOpacity={0.7}>
-                <Ionicons name="trash" size={16} color="#f87171" />
+            /* ── Instagram-style Recording Bar ─────────────────────── */
+            <View style={[styles.recordingBar, { backgroundColor: colors.surfaceElevated, borderColor: colors.border }]}>
+              {/* Trash - links */}
+              <TouchableOpacity
+                style={[styles.recSideBtn, { backgroundColor: colors.bg }]}
+                onPress={cancelRecording}
+                activeOpacity={0.7}
+              >
+                <Ionicons name="trash-outline" size={17} color={colors.textMuted} />
               </TouchableOpacity>
-              <View style={styles.pulseDot} />
-              <Text style={styles.recordingTimer}>{formatDuration(recordingDuration)}</Text>
+
+              {/* Waveform + Timer - mitte */}
+              <View style={styles.recCenter}>
+                <View style={[styles.recLiveDot, { backgroundColor: colors.brandOrange }]} />
                 <View style={{ flex: 1 }}>
-                <VoiceBars count={18} baseColor="#f87171" />
+                  <VoiceBars count={22} baseColor={colors.text} />
                 </View>
+                <Text style={[styles.recTimer, { color: colors.textMuted }]}>
+                  {formatDuration(recordingDuration)}
+                </Text>
+              </View>
+
+              {/* Send - rechts */}
+              <TouchableOpacity
+                style={[styles.recSideBtn, { backgroundColor: colors.brandOrange }]}
+                onPress={onMicUp}
+                activeOpacity={0.8}
+              >
+                <Ionicons name="arrow-up" size={18} color="#fff" />
+              </TouchableOpacity>
             </View>
           ) : isTranscribing ? (
             <View style={styles.transcribingRow}>
@@ -681,19 +702,15 @@ export default function CoachScreen() {
             />
           )}
 
-          {!isTranscribing && (
+          {!isRecording && !isTranscribing && (
             <TouchableOpacity
-              style={[styles.micBtn, { backgroundColor: colors.surfaceElevated }, isRecording && styles.micBtnActive, thinking && styles.micBtnDisabled]}
+              style={[styles.micBtn, { backgroundColor: colors.surfaceElevated }, thinking && styles.micBtnDisabled]}
               onPressIn={onMicDown}
               onPressOut={onMicUp}
               disabled={thinking}
               activeOpacity={0.7}
             >
-              <Ionicons
-                name={isRecording ? 'square' : 'mic'}
-                size={18}
-                color={isRecording ? '#fff' : colors.textMuted}
-              />
+              <Ionicons name="mic" size={18} color={colors.textMuted} />
             </TouchableOpacity>
           )}
 
@@ -960,37 +977,39 @@ const styles = StyleSheet.create({
   sendBtnDisabled: {
     opacity: 0.4,
   },
-  recordingContainer: {
+  recordingBar: {
     flex: 1,
-    height: 38,
+    height: 44,
     flexDirection: 'row',
     alignItems: 'center',
     gap: 8,
-    backgroundColor: 'rgba(220,38,38,0.08)',
-    borderWidth: 1,
-    borderColor: 'rgba(220,38,38,0.2)',
+    borderWidth: StyleSheet.hairlineWidth,
     borderRadius: 22,
-    paddingHorizontal: 12,
+    paddingHorizontal: 6,
   },
-  cancelBtn: {
+  recSideBtn: {
     width: 32,
     height: 32,
     borderRadius: 16,
-    backgroundColor: 'rgba(220,38,38,0.15)',
     alignItems: 'center',
     justifyContent: 'center',
   },
-  pulseDot: {
-    width: 8,
-    height: 8,
-    borderRadius: 4,
-    backgroundColor: '#dc2626',
+  recCenter: {
+    flex: 1,
+    flexDirection: 'row',
+    alignItems: 'center',
+    gap: 6,
   },
-  recordingTimer: {
-    fontSize: 13,
+  recLiveDot: {
+    width: 7,
+    height: 7,
+    borderRadius: 3.5,
+  },
+  recTimer: {
+    fontSize: 12,
     fontFamily: 'Nunito_600SemiBold',
-    color: '#f87171',
     fontVariant: ['tabular-nums'],
+    minWidth: 32,
   },
   transcribingRow: {
     flex: 1,