refactor(logging): replace all print/log with structured slog logger

- main.go: 30+ log.Printf → logger.Infof
- plugin/registry: 12 log.Printf → logger.Infof
- db/db.go, ws/hub.go: log → logger
- platform-bridge: fmt.Printf/println → logger.Info
- Logs now: time=... level=INFO msg=...
- 16 packages pass, vet clean

backend/services/platform-bridge/bridge.go

@@ -2,7 +2,11 @@
 // It defines unified message types and adapter interfaces for QQ, Telegram, Discord, and Webhook.
 package bridge
 
-import "time"
+import (
+	"time"
+
+	"git.yeij.top/AskaEth/Cyrene_v2/internal/logger"
+)
 
 // UnifiedMessage is the internal representation of a message from any platform.
 type UnifiedMessage struct {
@@ -85,7 +89,7 @@ func (r *Router) StartAll() {
 	for name, a := range r.adapters {
 		go func(name string, a Adapter) {
 			if err := a.Start(); err != nil {
-				println("[bridge]", name, "start error:", err.Error())
+				logger.Info("[bridge]", name, "start error:", err.Error())
 				return
 			}
 			for msg := range a.Incoming() {

backend/services/platform-bridge/discord/adapter.go

@@ -1,6 +1,6 @@
 package discord
 import (
-	"fmt"
+	"git.yeij.top/AskaEth/Cyrene_v2/internal/logger"
 	"git.yeij.top/AskaEth/Cyrene_v2/services/platform-bridge"
 )
 type Config struct{ Name, Token string }
@@ -17,5 +17,5 @@ func (a *Adapter) Stop() error { close(a.done); return nil }
 func (a *Adapter) Incoming() <-chan *bridge.UnifiedMessage { return a.incoming }
 func (a *Adapter) IsConnected() bool { return true }
 func (a *Adapter) Send(target, content string, opts bridge.SendOptions) error {
-	fmt.Printf("[dc:%s] -> %s: %s\n", a.cfg.Name, target, content); return nil
+	logger.Infof("[dc:%s] -> %s: %s\n", a.cfg.Name, target, content); return nil
 }

backend/services/platform-bridge/telegram/adapter.go

@@ -1,6 +1,6 @@
 package telegram
 import (
-	"fmt"
+	"git.yeij.top/AskaEth/Cyrene_v2/internal/logger"
 	"git.yeij.top/AskaEth/Cyrene_v2/services/platform-bridge"
 )
 type Config struct{ Name, Token string }
@@ -17,5 +17,5 @@ func (a *Adapter) Stop() error { close(a.done); return nil }
 func (a *Adapter) Incoming() <-chan *bridge.UnifiedMessage { return a.incoming }
 func (a *Adapter) IsConnected() bool { return true }
 func (a *Adapter) Send(target, content string, opts bridge.SendOptions) error {
-	fmt.Printf("[tg:%s] -> %s: %s\n", a.cfg.Name, target, content); return nil
+	logger.Infof("[tg:%s] -> %s: %s\n", a.cfg.Name, target, content); return nil
 }

backend/services/platform-bridge/webhook/adapter.go

@@ -1,7 +1,7 @@
 package webhook
 import (
 	"encoding/json"
-	"fmt"
+	"git.yeij.top/AskaEth/Cyrene_v2/internal/logger"
 	"net/http"
 	"time"
 	"git.yeij.top/AskaEth/Cyrene_v2/services/platform-bridge"
@@ -31,5 +31,5 @@ func (a *Adapter) Stop() error { if a.server!=nil { a.server.Close() }; close(a.
 func (a *Adapter) Incoming() <-chan *bridge.UnifiedMessage { return a.incoming }
 func (a *Adapter) IsConnected() bool { return true }
 func (a *Adapter) Send(target, content string, opts bridge.SendOptions) error {
-	fmt.Printf("[webhook:%s] -> %s: %s\n", a.cfg.Name, target, content); return nil
+	logger.Infof("[webhook:%s] -> %s: %s\n", a.cfg.Name, target, content); return nil
 }