feat: deliver P2 v0.2.0 with unified editor, search, and snapshots

Implement schema v2 migration, outline/setting/inspiration CRUD, unified TipTap editing, reference panel with mentions, FTS global search, chapter version history, writing landmarks, word frequency analysis, light theme contrast fixes, and full unit/E2E test coverage.

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

src/main/ipc/handlers/outline.handler.ts

@@ -0,0 +1,82 @@
+import { ipcMain } from 'electron'
+import { IPC } from '../../../shared/ipc-channels'
+import type { OutlineStatus } from '../../../shared/types'
+import { BookRegistryService } from '../../services/book-registry'
+import { ftsSync } from '../../services/fts-sync.service'
+import { wrap } from '../result'
+
+export function registerOutlineHandlers(registry: BookRegistryService): void {
+  ipcMain.handle(IPC.OUTLINE_LIST, (_e, { bookId }: { bookId: string }) =>
+    wrap(() => registry.getOutlineRepo(bookId).listFlat())
+  )
+
+  ipcMain.handle(
+    IPC.OUTLINE_CREATE,
+    (
+      _e,
+      {
+        bookId,
+        parentId,
+        title,
+        sortOrder
+      }: { bookId: string; parentId?: string | null; title: string; sortOrder?: number }
+    ) =>
+      wrap(() => {
+        const repo = registry.getOutlineRepo(bookId)
+        const order = sortOrder ?? repo.nextSortOrder(parentId ?? null)
+        const item = repo.create(parentId ?? null, title, order)
+        const db = registry.getDb(bookId)
+        ftsSync.upsert(db, 'outline', item.id, item.title, item.description)
+        return item
+      })
+  )
+
+  ipcMain.handle(
+    IPC.OUTLINE_UPDATE,
+    (
+      _e,
+      {
+        bookId,
+        id,
+        patch
+      }: {
+        bookId: string
+        id: string
+        patch: Partial<{
+          title: string
+          description: string
+          status: OutlineStatus
+          expectedWordCount: number | null
+          chapterId: string | null
+          sortOrder: number
+        }>
+      }
+    ) =>
+      wrap(() => {
+        const item = registry.getOutlineRepo(bookId).update(id, patch)
+        const db = registry.getDb(bookId)
+        ftsSync.upsert(db, 'outline', item.id, item.title, item.description)
+        return item
+      })
+  )
+
+  ipcMain.handle(IPC.OUTLINE_DELETE, (_e, { bookId, id }: { bookId: string; id: string }) =>
+    wrap(() => {
+      registry.getOutlineRepo(bookId).delete(id)
+      ftsSync.remove(registry.getDb(bookId), 'outline', id)
+    })
+  )
+
+  ipcMain.handle(
+    IPC.OUTLINE_MOVE,
+    (
+      _e,
+      {
+        bookId,
+        id,
+        parentId,
+        sortOrder
+      }: { bookId: string; id: string; parentId?: string | null; sortOrder: number }
+    ) => wrap(() => registry.getOutlineRepo(bookId).move(id, parentId ?? null, sortOrder))
+  )
+}