feat: add unification handler and inheritance system

- Implemented `unificationHandler.ts` to manage nation unification logic, including inheritance point calculations and logging.
- Created `InheritView.vue` for frontend management of inheritance points, buffs, and logs.
- Added database migration for new inheritance tables: `inheritance_point`, `inheritance_log`, `inheritance_result`, and `inheritance_user_state`.
- Developed inheritance buff logic in `inheritBuff.ts` to apply buffs during domestic and war actions.

packages/infra/prisma/game.prisma

@@ -206,3 +206,50 @@ model LogEntry {
     @@index([userId, category, id])
     @@map("log_entry")
 }
+
+model InheritancePoint {
+    id        Int      @id @default(autoincrement())
+    userId    String   @map("user_id")
+    key       String
+    value     Float    @default(0)
+    aux       Json     @default(dbgenerated("'{}'::jsonb"))
+    updatedAt DateTime @updatedAt @map("updated_at")
+
+    @@unique([userId, key])
+    @@index([userId])
+    @@map("inheritance_point")
+}
+
+model InheritanceLog {
+    id        Int      @id @default(autoincrement())
+    userId    String   @map("user_id")
+    year      Int
+    month     Int
+    text      String
+    createdAt DateTime @default(now()) @map("created_at")
+
+    @@index([userId, id])
+    @@map("inheritance_log")
+}
+
+model InheritanceResult {
+    id        Int      @id @default(autoincrement())
+    serverId  String   @map("server_id")
+    owner     String   @map("owner")
+    generalId Int      @map("general_id")
+    year      Int
+    month     Int
+    value     Json     @default(dbgenerated("'{}'::jsonb"))
+    createdAt DateTime @default(now()) @map("created_at")
+
+    @@index([serverId, owner])
+    @@map("inheritance_result")
+}
+
+model InheritanceUserState {
+    userId    String   @id @map("user_id")
+    meta      Json     @default(dbgenerated("'{}'::jsonb"))
+    updatedAt DateTime @updatedAt @map("updated_at")
+
+    @@map("inheritance_user_state")
+}

packages/infra/prisma/migrations/20250309000000_add_inheritance_tables/migration.sql

@@ -0,0 +1,41 @@
+CREATE TABLE "inheritance_point" (
+    "id" SERIAL PRIMARY KEY,
+    "user_id" TEXT NOT NULL,
+    "key" TEXT NOT NULL,
+    "value" DOUBLE PRECISION NOT NULL DEFAULT 0,
+    "aux" JSONB NOT NULL DEFAULT '{}'::jsonb,
+    "updated_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE UNIQUE INDEX "inheritance_point_user_id_key" ON "inheritance_point"("user_id", "key");
+CREATE INDEX "inheritance_point_user_id_idx" ON "inheritance_point"("user_id");
+
+CREATE TABLE "inheritance_log" (
+    "id" SERIAL PRIMARY KEY,
+    "user_id" TEXT NOT NULL,
+    "year" INTEGER NOT NULL,
+    "month" INTEGER NOT NULL,
+    "text" TEXT NOT NULL,
+    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE INDEX "inheritance_log_user_id_idx" ON "inheritance_log"("user_id", "id");
+
+CREATE TABLE "inheritance_result" (
+    "id" SERIAL PRIMARY KEY,
+    "server_id" TEXT NOT NULL,
+    "owner" TEXT NOT NULL,
+    "general_id" INTEGER NOT NULL,
+    "year" INTEGER NOT NULL,
+    "month" INTEGER NOT NULL,
+    "value" JSONB NOT NULL DEFAULT '{}'::jsonb,
+    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE INDEX "inheritance_result_server_owner_idx" ON "inheritance_result"("server_id", "owner");
+
+CREATE TABLE "inheritance_user_state" (
+    "user_id" TEXT PRIMARY KEY,
+    "meta" JSONB NOT NULL DEFAULT '{}'::jsonb,
+    "updated_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP
+);