feat: Add Smart Auto-Sorting and Auto-Tagging Rules (Inbox Triage Engine)

prisma/schema.prisma

@@ -41,6 +41,7 @@ model Notebook {
   createdAt  DateTime       @default(now())
   updatedAt  DateTime       @updatedAt
   notes      Note[]
+  autoSortRules AutoSortRule[]
 
   @@unique([userId, name])
   @@index([userId])
@@ -185,3 +186,25 @@ model EmailConfig {
   emailsImported  Int       @default(0)
   updatedAt       DateTime  @updatedAt
 }
+
+model AutoSortRule {
+  id                String    @id @default(cuid())
+  userId            String    @default("default")
+  name              String
+  enabled           Boolean   @default(true)
+  priority          Int       @default(0)
+  conditionField    String    @default("title") // title | content | sourceUrl | author | attachmentType | hasTodo
+  conditionOperator String    @default("contains") // contains | not_contains | equals | startsWith | endsWith | matchesRegex
+  conditionValue    String    @default("")
+  targetNotebookId  String?
+  targetNotebook    Notebook? @relation(fields: [targetNotebookId], references: [id], onDelete: SetNull)
+  addTags           String    @default("") // comma-separated tag names
+  isPinned          Boolean?
+  isShortcut        Boolean?
+  stopOnMatch       Boolean   @default(true)
+  createdAt         DateTime  @default(now())
+  updatedAt         DateTime  @updatedAt
+
+  @@index([userId, enabled, priority])
+  @@index([targetNotebookId])
+}