fix(ui): Teilen-Button ohne Icon h:44, Dropdown-Width 170→210pt

ComposeCard:
- paper-plane-Icon entfernt, h:52→44, px-6→5, layout flex-row gap-2 →
  items-center justify-center, only Text. Saubere Pill ohne Icon-Gewicht.
- i18n-Key community.share war schon da — kein neuer Key.

HeaderDropdownMenu:
- minWidth 170→210, numberOfLines={1} auf Item-Labels entfernt (Breite
  reicht jetzt fuer alle Labels). numberOfLines bei SOS-Block-Labels
  bleibt (zwei separate Text-Nodes, sinnvoll).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/rebreak-native/components/ComposeCard.tsx

@@ -163,19 +163,16 @@ export function ComposeCard({ onPosted }: Props) {
             <Pressable
               onPress={submit}
               disabled={!content.trim() || posting}
-              className="px-6 rounded-full bg-rebreak-500 items-center justify-center flex-row gap-2"
+              className="px-5 rounded-full bg-rebreak-500 items-center justify-center"
               style={({ pressed }) => ({
-                height: 52,
+                height: 44,
                 opacity: pressed || !content.trim() || posting ? 0.5 : 1,
               })}
             >
               {posting ? (
                 <ActivityIndicator size="small" color="#fff" />
               ) : (
-                <>
+                <Text className="text-white text-base" style={{ fontFamily: 'Nunito_700Bold' }}>{t('community.share')}</Text>
-                  <Ionicons name="paper-plane-outline" size={18} color="#fff" />
-                  <Text className="text-white text-base" style={{ fontFamily: 'Nunito_700Bold' }}>{t('community.share')}</Text>
-                </>
               )}
             </Pressable>
           </View>

apps/rebreak-native/components/header/HeaderDropdownMenu.tsx

@@ -100,7 +100,7 @@ export function HeaderDropdownMenu({ visible, onClose, topOffset = 80 }: Props)
               shadowOpacity: 0.18,
               shadowRadius: 20,
               elevation: 12,
-              minWidth: 170,
+              minWidth: 210,
               overflow: 'hidden',
             }}
           >
@@ -190,7 +190,6 @@ export function HeaderDropdownMenu({ visible, onClose, topOffset = 80 }: Props)
                     style={{ marginRight: 14 }}
                   />
                   <Text
-                    numberOfLines={1}
                     style={{
                       fontSize: 14,
                       fontFamily: 'Nunito_600SemiBold',
@@ -228,7 +227,6 @@ export function HeaderDropdownMenu({ visible, onClose, topOffset = 80 }: Props)
                   style={{ marginRight: 14 }}
                 />
                 <Text
-                  numberOfLines={1}
                   style={{
                     fontSize: 14,
                     fontFamily: 'Nunito_600SemiBold',