feat: in-memory inquiry flow — send from card, pipeline, and detail

New inquiryStore (Zustand) holds sent inquiries for the session.
InquiryQuickDialog reads from the store (no props), renders wherever needed.
Sent inquiries appear immediately at the top of the Anfragen page.

Entry points:
- Match cards: "Anfrage" button on every card in the results feed
- MatchDetail: primary action in NextActionsPanel
- Pipeline: chat icon on every DraggableCard

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

src/components/pipeline/PipelineColumn.tsx

@@ -11,6 +11,7 @@ export function DroppableColumn({
   selectedId,
   onSelect,
   onChatClick,
+  onCardChatClick,
   isOver,
 }: {
   stage: { key: PipelineStage; label: string; color: string; bgColor: string }
@@ -18,6 +19,7 @@ export function DroppableColumn({
   selectedId: string | null
   onSelect: (item: PipelineItem) => void
   onChatClick: (inquiryId: string) => void
+  onCardChatClick?: (item: PipelineItem) => void
   isOver: boolean
 }) {
   const { setNodeRef } = useDroppable({ id: stage.key })
@@ -43,7 +45,13 @@ export function DroppableColumn({
           item={item}
           isSelected={item.id === selectedId}
           onSelect={onSelect}
-          onChatClick={item.inquiryId ? (e) => { e.stopPropagation(); onChatClick(item.inquiryId!) } : undefined}
+          onChatClick={
+            item.inquiryId
+              ? (e) => { e.stopPropagation(); onChatClick(item.inquiryId!) }
+              : onCardChatClick
+                ? (e) => { e.stopPropagation(); onCardChatClick(item) }
+                : undefined
+          }
         />
       ))}
       {items.length === 0 && (