feat: ship v1.0.0 with character graph and writing analytics

Add P7 Cytoscape relationship graph with setting CRUD, P9 cockpit analytics driven by writing_sessions, chapter POV selection, and full test coverage.

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

src/renderer/stores/useGraphStore.ts

@@ -0,0 +1,34 @@
+import { create } from 'zustand'
+import type { CharacterGraphData } from '@shared/types'
+import { ipcCall } from '@renderer/lib/ipc-client'
+
+interface GraphState {
+  open: boolean
+  data: CharacterGraphData | null
+  loading: boolean
+  filter: 'all' | 'connected'
+  openModal: () => void
+  close: () => void
+  load: (bookId: string, filter?: 'all' | 'connected') => Promise<void>
+  setFilter: (filter: 'all' | 'connected') => void
+}
+
+export const useGraphStore = create<GraphState>((set, get) => ({
+  open: false,
+  data: null,
+  loading: false,
+  filter: 'all',
+  openModal: () => set({ open: true }),
+  close: () => set({ open: false, data: null }),
+  setFilter: (filter) => set({ filter }),
+  load: async (bookId, filter) => {
+    const f = filter ?? get().filter
+    set({ loading: true })
+    try {
+      const data = await ipcCall(() => window.electronAPI.graph.getData(bookId, f))
+      set({ data, filter: f })
+    } finally {
+      set({ loading: false })
+    }
+  }
+}))