refactor(live-log): Position-Terminologie und Modal-UX vereinheitlichen

Fix/Standort heißen überall Position (__live:position, Legacy __live:fix).
Nachfüll-Buttons + Diesel/+ Wasser, Abbruch statt Nein in Live-Modals.

Co-authored-by: Cursor <cursoragent@cursor.com>

client/src/components/LiveVoiceCapture.tsx

@@ -199,7 +199,7 @@ export default function LiveVoiceCapture({
             className="btn-icon"
             onClick={onClose}
             disabled={busy || saving || phase === 'recording'}
-            aria-label={t('logs.confirm_no')}
+            aria-label={t('logs.live_cancel')}
           >
             <X size={18} />
           </button>