refactor: rebrand from cs-agent to BossChat

- Rename Go module: cs-agent → bosschat
- Rename all import paths across 200+ Go files
- Rename SDK: cs-ai-agent-sdk → bosschat-sdk
- Rename message protocol: cs-agent:* → bosschat:*
- Rename JS globals: CSAgentConfig → BossChatConfig
- Rename CSS classes: cs-agent-* → bosschat-*
- Update Makefile APP_NAME and ARCHIVE_NAME
- Update logo assets
- Fix display name: BoosChat → BossChat

internal/ai/runtime/graphs/analyze_conversation_graph.go

@@ -6,8 +6,8 @@ import (
 	"fmt"
 	"strings"
 
-	"cs-agent/internal/models"
-	"cs-agent/internal/services"
+	"bosschat/internal/models"
+	"bosschat/internal/services"
 )
 
 type AnalyzeConversationInput struct {

internal/ai/runtime/graphs/analyze_conversation_graph_test.go

@@ -3,8 +3,8 @@ package graphs
 import (
 	"testing"
 
-	"cs-agent/internal/models"
-	"cs-agent/internal/pkg/enums"
+	"bosschat/internal/models"
+	"bosschat/internal/pkg/enums"
 )
 
 func TestBuildAnalyzeConversationResult_RecommendsHandoffForComplaint(t *testing.T) {

internal/ai/runtime/graphs/create_ticket_graph.go

@@ -6,11 +6,11 @@ import (
 	"fmt"
 	"strings"
 
-	"cs-agent/internal/ai/runtime/tooling"
-	"cs-agent/internal/models"
-	"cs-agent/internal/pkg/dto"
-	"cs-agent/internal/pkg/dto/request"
-	"cs-agent/internal/services"
+	"bosschat/internal/ai/runtime/tooling"
+	"bosschat/internal/models"
+	"bosschat/internal/pkg/dto"
+	"bosschat/internal/pkg/dto/request"
+	"bosschat/internal/services"
 
 	componenttool "github.com/cloudwego/eino/components/tool"
 	"github.com/cloudwego/eino/schema"
@@ -31,8 +31,8 @@ type createTicketGraphArgs struct {
 }
 
 func init() {
-	schema.RegisterName[CreateTicketGraphState]("cs_agent_create_ticket_graph_state")
-	schema.RegisterName[CreateTicketGraphInterruptInfo]("cs_agent_create_ticket_graph_interrupt_info")
+	schema.RegisterName[CreateTicketGraphState]("bosschat_create_ticket_graph_state")
+	schema.RegisterName[CreateTicketGraphInterruptInfo]("bosschat_create_ticket_graph_interrupt_info")
 }
 
 type CreateTicketGraph struct {

internal/ai/runtime/graphs/handoff_graph.go

@@ -6,9 +6,9 @@ import (
 	"fmt"
 	"strings"
 
-	"cs-agent/internal/ai/runtime/tooling"
-	"cs-agent/internal/models"
-	"cs-agent/internal/services"
+	"bosschat/internal/ai/runtime/tooling"
+	"bosschat/internal/models"
+	"bosschat/internal/services"
 
 	componenttool "github.com/cloudwego/eino/components/tool"
 	"github.com/cloudwego/eino/schema"
@@ -28,8 +28,8 @@ type handoffGraphArgs struct {
 }
 
 func init() {
-	schema.RegisterName[HandoffGraphState]("cs_agent_handoff_graph_state")
-	schema.RegisterName[HandoffGraphInterruptInfo]("cs_agent_handoff_graph_interrupt_info")
+	schema.RegisterName[HandoffGraphState]("bosschat_handoff_graph_state")
+	schema.RegisterName[HandoffGraphInterruptInfo]("bosschat_handoff_graph_interrupt_info")
 }
 
 type HandoffGraph struct {

internal/ai/runtime/graphs/handoff_graph_test.go

@@ -7,10 +7,10 @@ import (
 	"testing"
 	"time"
 
-	"cs-agent/internal/ai/runtime/tooling"
-	"cs-agent/internal/models"
-	"cs-agent/internal/pkg/enums"
-	"cs-agent/internal/services"
+	"bosschat/internal/ai/runtime/tooling"
+	"bosschat/internal/models"
+	"bosschat/internal/pkg/enums"
+	"bosschat/internal/services"
 
 	"github.com/glebarez/sqlite"
 	"github.com/mlogclub/simple/sqls"

internal/ai/runtime/graphs/prepare_ticket_draft_graph.go

@@ -6,9 +6,9 @@ import (
 	"fmt"
 	"strings"
 
-	"cs-agent/internal/models"
-	"cs-agent/internal/pkg/enums"
-	"cs-agent/internal/services"
+	"bosschat/internal/models"
+	"bosschat/internal/pkg/enums"
+	"bosschat/internal/services"
 )
 
 type PrepareTicketDraftInput struct {

internal/ai/runtime/graphs/prepare_ticket_draft_graph_test.go

@@ -3,8 +3,8 @@ package graphs
 import (
 	"testing"
 
-	"cs-agent/internal/models"
-	"cs-agent/internal/pkg/enums"
+	"bosschat/internal/models"
+	"bosschat/internal/pkg/enums"
 )
 
 func TestBuildPrepareTicketDraftResult_UsesConversationFallbacks(t *testing.T) {

internal/ai/runtime/graphs/triage_service_request_graph.go

@@ -6,8 +6,8 @@ import (
 	"fmt"
 	"strings"
 
-	"cs-agent/internal/models"
-	"cs-agent/internal/services"
+	"bosschat/internal/models"
+	"bosschat/internal/services"
 )
 
 type TriageServiceRequestInput struct {

internal/ai/runtime/graphs/triage_service_request_graph_test.go

@@ -3,8 +3,8 @@ package graphs
 import (
 	"testing"
 
-	"cs-agent/internal/models"
-	"cs-agent/internal/pkg/enums"
+	"bosschat/internal/models"
+	"bosschat/internal/pkg/enums"
 )
 
 func TestTriageServiceRequestResult_PrepareTicket(t *testing.T) {