refactor: move PipelineItems from Zustand to Provider→Service→React Query

PipelineItems are domain data and must not live in Zustand. Moves the
full stack to the correct layer: MockupPipelineProvider (localStorage
persistence + seed fallback) → pipelineService → usePipeline hooks
(useQuery for reads, useMutation for writes with cache invalidation).

pipelineStore is now UI-only: dialogOpen, pendingItem, openSavedDialog,
closeSavedDialog. All consumers updated to use the new hooks.

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

src/provider/IPipelineProvider.ts

@@ -0,0 +1,10 @@
+import type { PipelineItem, PipelineStage } from '../domain/pipeline'
+
+export interface IPipelineProvider {
+  getAll(): Promise<PipelineItem[]>
+  add(item: PipelineItem): Promise<void>
+  moveStage(id: string, stage: PipelineStage): Promise<void>
+  updateNotes(id: string, notes: string): Promise<void>
+  loseItem(id: string): Promise<void>
+  linkInquiry(id: string, inquiryId: string): Promise<void>
+}

src/provider/MockupPipelineProvider.ts

@@ -0,0 +1,67 @@
+import type { IPipelineProvider } from './IPipelineProvider'
+import type { PipelineItem, PipelineStage } from '../domain/pipeline'
+import { mockPipelineItems } from '../mock-data/pipelineItems'
+
+const STORAGE_KEY = 'property_match_pipeline_items'
+
+function load(): PipelineItem[] {
+  try {
+    const raw = localStorage.getItem(STORAGE_KEY)
+    if (raw) return JSON.parse(raw) as PipelineItem[]
+  } catch { /* ignore */ }
+  return [...mockPipelineItems]
+}
+
+function save(items: PipelineItem[]): void {
+  try {
+    localStorage.setItem(STORAGE_KEY, JSON.stringify(items))
+  } catch { /* ignore */ }
+}
+
+export const MockupPipelineProvider: IPipelineProvider = {
+  async getAll() {
+    return load()
+  },
+
+  async add(item) {
+    const items = load()
+    items.push(item)
+    save(items)
+  },
+
+  async moveStage(id: string, stage: PipelineStage) {
+    const items = load()
+    const idx = items.findIndex(i => i.id === id)
+    if (idx !== -1) {
+      items[idx] = { ...items[idx], stage, updatedAt: new Date().toISOString() }
+      save(items)
+    }
+  },
+
+  async updateNotes(id: string, notes: string) {
+    const items = load()
+    const idx = items.findIndex(i => i.id === id)
+    if (idx !== -1) {
+      items[idx] = { ...items[idx], notes }
+      save(items)
+    }
+  },
+
+  async loseItem(id: string) {
+    const items = load()
+    const idx = items.findIndex(i => i.id === id)
+    if (idx !== -1) {
+      items[idx] = { ...items[idx], stage: 'CLOSED_LOST', updatedAt: new Date().toISOString() }
+      save(items)
+    }
+  },
+
+  async linkInquiry(id: string, inquiryId: string) {
+    const items = load()
+    const idx = items.findIndex(i => i.id === id)
+    if (idx !== -1) {
+      items[idx] = { ...items[idx], inquiryId }
+      save(items)
+    }
+  },
+}