feat(agent): Agent 工作台 - 计划插话记忆、统一模型选择器并修复摘要与视频入库

将计划清单、运行中插话和个人记忆接入云端 Agent；全站模型选择器统一为左右二级菜单。画布摘要按预算截断不再整轮拒绝，首页视频未知宽高可入库。README 补充贡献者 morrow。

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

backend/internal/database/migrations.go

@@ -11,7 +11,7 @@ import (
 	"gorm.io/gorm"
 )
 
-const CurrentSchemaVersion int64 = 15
+const CurrentSchemaVersion int64 = 18
 
 const baselineSchemaChecksum = "sha256:open-ai-canvas-schema-v1-20260830"
 const schemaMigrationAppliedAtIndexChecksum = "sha256:schema-migrations-applied-at-index-v2-20260830"
@@ -67,6 +67,15 @@ var schemaMigrations = []migration{
 	{version: 15, name: "agent_profiles", checksum: "sha256:agent-profiles-v15-20260914", apply: func(tx *gorm.DB) error {
 		return tx.AutoMigrate(&model.AgentProfile{})
 	}},
+	{version: 16, name: "agent_lessons", checksum: "sha256:agent-lessons-v16-20260917", apply: func(tx *gorm.DB) error {
+		return tx.AutoMigrate(&model.AgentLesson{})
+	}},
+	{version: 17, name: "agent_lessons_owner_index", checksum: "sha256:agent-lessons-owner-index-v17-20260917", apply: func(tx *gorm.DB) error {
+		return tx.AutoMigrate(&model.AgentLesson{})
+	}},
+	{version: 18, name: "agent_memory_settings", checksum: "sha256:agent-memory-settings-v18-20260917", apply: func(tx *gorm.DB) error {
+		return tx.AutoMigrate(&model.AgentMemorySetting{})
+	}},
 }
 
 func migrateSchemaV14(tx *gorm.DB) error {

backend/internal/database/migrations_test.go

@@ -35,6 +35,15 @@ func TestMigrateSchemaRecordsAndValidatesVersion(t *testing.T) {
 	if !db.Migrator().HasTable(&model.AgentProfile{}) || !db.Migrator().HasIndex(&model.AgentProfile{}, "idx_agent_profiles_scope") {
 		t.Fatal("schema migration v15 did not create scoped Agent profiles")
 	}
+	if !db.Migrator().HasTable(&model.AgentLesson{}) || !db.Migrator().HasIndex(&model.AgentLesson{}, "idx_agent_lessons_status") {
+		t.Fatal("schema migration v16 did not create Agent lessons")
+	}
+	if !db.Migrator().HasIndex(&model.AgentLesson{}, "idx_agent_lessons_author_status") {
+		t.Fatal("schema migration v17 did not create owner status index")
+	}
+	if !db.Migrator().HasTable(&model.AgentMemorySetting{}) {
+		t.Fatal("schema migration v18 did not create agent memory settings")
+	}
 	if err := MigrateSchema(db); err != nil {
 		t.Fatalf("migration should be idempotent: %v", err)
 	}
@@ -61,7 +70,85 @@ func TestMigrateSchemaV15UpgradesExistingDatabase(t *testing.T) {
 		t.Fatal("v15 upgrade did not install Agent profile table and scope index")
 	}
 	status, err := ReadSchemaStatus(db)
-	if err != nil || !status.Ready || status.Current != 15 {
+	if err != nil || !status.Ready || status.Current != CurrentSchemaVersion {
+		t.Fatalf("unexpected upgraded schema status: %+v, %v", status, err)
+	}
+}
+
+func TestMigrateSchemaV16UpgradesExistingDatabase(t *testing.T) {
+	db, err := Open(Config{Driver: "sqlite", DSN: "file:migration-agent-lessons-v16?mode=memory&cache=shared"})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := MigrateSchema(db); err != nil {
+		t.Fatal(err)
+	}
+	if err := db.Migrator().DropTable(&model.AgentLesson{}); err != nil {
+		t.Fatal(err)
+	}
+	if err := db.Where("version = ?", 16).Delete(&schemaMigration{}).Error; err != nil {
+		t.Fatal(err)
+	}
+	if err := MigrateSchema(db); err != nil {
+		t.Fatalf("upgrade from v15: %v", err)
+	}
+	if !db.Migrator().HasTable(&model.AgentLesson{}) || !db.Migrator().HasIndex(&model.AgentLesson{}, "idx_agent_lessons_status") {
+		t.Fatal("v16 upgrade did not install Agent lesson table and status index")
+	}
+	status, err := ReadSchemaStatus(db)
+	if err != nil || !status.Ready || status.Current != CurrentSchemaVersion {
+		t.Fatalf("unexpected upgraded schema status: %+v, %v", status, err)
+	}
+}
+
+func TestMigrateSchemaV17UpgradesExistingDatabase(t *testing.T) {
+	db, err := Open(Config{Driver: "sqlite", DSN: "file:migration-agent-lessons-v17?mode=memory&cache=shared"})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := MigrateSchema(db); err != nil {
+		t.Fatal(err)
+	}
+	if err := db.Migrator().DropIndex(&model.AgentLesson{}, "idx_agent_lessons_author_status"); err != nil {
+		t.Fatal(err)
+	}
+	if err := db.Where("version = ?", 17).Delete(&schemaMigration{}).Error; err != nil {
+		t.Fatal(err)
+	}
+	if err := MigrateSchema(db); err != nil {
+		t.Fatalf("upgrade from v16: %v", err)
+	}
+	if !db.Migrator().HasIndex(&model.AgentLesson{}, "idx_agent_lessons_author_status") {
+		t.Fatal("v17 upgrade did not install owner status index")
+	}
+	status, err := ReadSchemaStatus(db)
+	if err != nil || !status.Ready || status.Current != CurrentSchemaVersion {
+		t.Fatalf("unexpected upgraded schema status: %+v, %v", status, err)
+	}
+}
+
+func TestMigrateSchemaV18UpgradesExistingDatabase(t *testing.T) {
+	db, err := Open(Config{Driver: "sqlite", DSN: "file:migration-agent-memory-settings-v18?mode=memory&cache=shared"})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := MigrateSchema(db); err != nil {
+		t.Fatal(err)
+	}
+	if err := db.Migrator().DropTable(&model.AgentMemorySetting{}); err != nil {
+		t.Fatal(err)
+	}
+	if err := db.Where("version = ?", 18).Delete(&schemaMigration{}).Error; err != nil {
+		t.Fatal(err)
+	}
+	if err := MigrateSchema(db); err != nil {
+		t.Fatalf("upgrade from v17: %v", err)
+	}
+	if !db.Migrator().HasTable(&model.AgentMemorySetting{}) {
+		t.Fatal("v18 upgrade did not install agent memory settings")
+	}
+	status, err := ReadSchemaStatus(db)
+	if err != nil || !status.Ready || status.Current != CurrentSchemaVersion {
 		t.Fatalf("unexpected upgraded schema status: %+v, %v", status, err)
 	}
 }

backend/internal/database/schema.go

@@ -19,6 +19,8 @@ func Models() []any {
 		&model.CloudAgentExecution{},
 		&model.CloudAgentCanvasMutation{},
 		&model.AgentProfile{},
+		&model.AgentLesson{},
+		&model.AgentMemorySetting{},
 		&model.User{},
 		&model.AuthSession{},
 		&model.UserIdentity{},