Fix: Kanban-Modal auf Mobile über Bottom-Nav positionieren (paddingBottom nav-height)

frontend/src/tools/kanban.jsx

@@ -69,12 +69,18 @@ function CardModal({ card, columnId, columns, onSave, onClose, toast }) {
   return (
     <div onClick={e => e.target === e.currentTarget && onClose()}
       style={{ position:'fixed',inset:0,background:'rgba(0,0,0,0.7)',zIndex:1000,
-        display:'flex',alignItems:isMob?'flex-end':'center',justifyContent:'center',padding:isMob?0:20 }}>
+        display:'flex',
+        alignItems:isMob?'flex-end':'center',
+        justifyContent:'center',
+        padding:isMob?0:20,
+        // Auf Mobile: unten Platz für die fixe Bottom-Nav (56px + safe-area) lassen
+        paddingBottom: isMob ? 'calc(56px + env(safe-area-inset-bottom, 0px))' : 20,
+      }}>
       <div style={{ background:'#1a1a1e',border:'1px solid rgba(255,255,255,0.12)',
         borderRadius:isMob?'16px 16px 0 0':14,
         width:'100%',maxWidth:460,
         display:'flex',flexDirection:'column',
-        maxHeight: isMob ? '92vh' : '90vh',
+        maxHeight: isMob ? '80vh' : '90vh',
       }}>
         {/* Drag-Handle + Header – immer sichtbar, nicht scrollend */}
         <div style={{ padding:'18px 20px 0', flexShrink:0 }}>