chore: init next prisma and file structure

prisma/schema.prisma

@@ -0,0 +1,67 @@
+// This is your Prisma schema file,
+// learn more about it in the docs: https://pris.ly/d/prisma-schema
+
+generator client {
+  provider = "prisma-client-js"
+}
+
+datasource db {
+  provider = "sqlite"
+  url      = env("DATABASE_URL")
+}
+
+model Task {
+  id          String   @id @default(cuid())
+  title       String
+  description String?
+  status      String   @default("todo")
+  priority    String   @default("medium")
+  source      String   // "reminders" | "jira"
+  sourceId    String?  // ID dans le système source
+  tagsJson    String   @default("[]") // JSON string des tags pour compatibilité
+  dueDate     DateTime?
+  completedAt DateTime?
+  createdAt   DateTime @default(now())
+  updatedAt   DateTime @updatedAt
+  
+  // Métadonnées Jira
+  jiraProject String?
+  jiraKey     String?
+  assignee    String?
+  
+  // Relations
+  taskTags    TaskTag[]
+  
+  @@unique([source, sourceId])
+  @@map("tasks")
+}
+
+model Tag {
+  id       String    @id @default(cuid())
+  name     String    @unique
+  color    String    @default("#6b7280")
+  taskTags TaskTag[]
+  
+  @@map("tags")
+}
+
+model TaskTag {
+  taskId String
+  tagId  String
+  task   Task   @relation(fields: [taskId], references: [id], onDelete: Cascade)
+  tag    Tag    @relation(fields: [tagId], references: [id], onDelete: Cascade)
+  
+  @@id([taskId, tagId])
+  @@map("task_tags")
+}
+
+model SyncLog {
+  id        String   @id @default(cuid())
+  source    String   // "reminders" | "jira"
+  status    String   // "success" | "error"
+  message   String?
+  tasksSync Int      @default(0)
+  createdAt DateTime @default(now())
+  
+  @@map("sync_logs")
+}