重构：把剩余 12 个顶层包全部迁到 internal/

继续之前的重构：把根目录残留的非数据/资源类子目录（agents、agenttool、ai、
autoreply、completion、conversation、llm、message、mqtpp、stream、
toolmanager、toolrouter）一并搬到 internal/ 下，并把全工程引用它们的
import 路径从 "meshtastic_mqtt_server/<x>" 重写为
"meshtastic_mqtt_server/internal/<x>"。

变更
- git mv 12 个顶层目录进 internal/，无函数体改动。
- 全工程 sed 把 import path 加上 internal/ 前缀，包括 main.go、
  internal/bot/bot_service.go、internal/store/bot_store.go 中对 mqtpp
  的引用，以及 ai 子系统内部 agents/agenttool/autoreply/conversation/
  llm/toolmanager/toolrouter 之间的相互引用。

验证
- go build ./... 通过；go test ./... 全部包通过。
- AI 自动回复链路（main → ai.NewService → autoreply.Service → botSender）
  保持不变，仅 import 路径调整。
- 根目录最终只剩 main.go / main_test.go / internal/ 加 go.mod / go.sum
  与数据资源目录（dist、doc、firmware、py、win、meshmap_frontend）。

Co-Authored-By: Claude <noreply@anthropic.com>

internal/agents/calculator/calculator.go

@@ -10,7 +10,7 @@ import (
 	"math"
 	"strconv"
 
-	"meshtastic_mqtt_server/agenttool"
+	"meshtastic_mqtt_server/internal/agenttool"
 
 	"github.com/volcengine/volcengine-go-sdk/service/arkruntime/model"
 )

internal/agents/time/time.go

@@ -6,7 +6,7 @@ import (
 	"fmt"
 	"time"
 
-	"meshtastic_mqtt_server/agenttool"
+	"meshtastic_mqtt_server/internal/agenttool"
 
 	"github.com/volcengine/volcengine-go-sdk/service/arkruntime/model"
 )

internal/ai/service.go

@@ -6,14 +6,14 @@ import (
 	"os"
 	"path/filepath"
 
-	"meshtastic_mqtt_server/agenttool"
-	_ "meshtastic_mqtt_server/agents/calculator"
-	_ "meshtastic_mqtt_server/agents/time"
-	"meshtastic_mqtt_server/autoreply"
-	"meshtastic_mqtt_server/conversation"
-	"meshtastic_mqtt_server/llm"
-	"meshtastic_mqtt_server/toolmanager"
-	"meshtastic_mqtt_server/toolrouter"
+	"meshtastic_mqtt_server/internal/agenttool"
+	_ "meshtastic_mqtt_server/internal/agents/calculator"
+	_ "meshtastic_mqtt_server/internal/agents/time"
+	"meshtastic_mqtt_server/internal/autoreply"
+	"meshtastic_mqtt_server/internal/conversation"
+	"meshtastic_mqtt_server/internal/llm"
+	"meshtastic_mqtt_server/internal/toolmanager"
+	"meshtastic_mqtt_server/internal/toolrouter"
 
 	"gorm.io/gorm"
 )

internal/autoreply/service.go

@@ -8,12 +8,12 @@ import (
 	"time"
 	"unicode/utf8"
 
-	"meshtastic_mqtt_server/completion"
-	"meshtastic_mqtt_server/conversation"
-	"meshtastic_mqtt_server/llm"
-	"meshtastic_mqtt_server/message"
-	"meshtastic_mqtt_server/toolmanager"
-	"meshtastic_mqtt_server/toolrouter"
+	"meshtastic_mqtt_server/internal/completion"
+	"meshtastic_mqtt_server/internal/conversation"
+	"meshtastic_mqtt_server/internal/llm"
+	"meshtastic_mqtt_server/internal/message"
+	"meshtastic_mqtt_server/internal/toolmanager"
+	"meshtastic_mqtt_server/internal/toolrouter"
 
 	"github.com/volcengine/volcengine-go-sdk/service/arkruntime/model"
 )

internal/bot/bot_service.go

@@ -16,7 +16,7 @@ import (
 	"gorm.io/gorm"
 
 	storepkg "meshtastic_mqtt_server/internal/store"
-	"meshtastic_mqtt_server/mqtpp"
+	"meshtastic_mqtt_server/internal/mqtpp"
 )
 
 const botMaxTextBytes = 200

internal/completion/completion.go

@@ -6,8 +6,8 @@ import (
 	"strings"
 	"time"
 
-	"meshtastic_mqtt_server/llm"
-	"meshtastic_mqtt_server/message"
+	"meshtastic_mqtt_server/internal/llm"
+	"meshtastic_mqtt_server/internal/message"
 
 	"github.com/volcengine/volcengine-go-sdk/service/arkruntime/model"
 )

internal/conversation/store.go

@@ -11,7 +11,7 @@ import (
 	"sync"
 	"time"
 
-	"meshtastic_mqtt_server/message"
+	"meshtastic_mqtt_server/internal/message"
 )
 
 // Store manages conversations stored as JSON files

internal/store/bot_store.go

@@ -11,7 +11,7 @@ import (
 	"time"
 	"unicode/utf8"
 
-	"meshtastic_mqtt_server/mqtpp"
+	"meshtastic_mqtt_server/internal/mqtpp"
 
 	"gorm.io/gorm"
 )

internal/toolmanager/manager.go

@@ -8,7 +8,7 @@ import (
 	"sort"
 	"strings"
 
-	"meshtastic_mqtt_server/agenttool"
+	"meshtastic_mqtt_server/internal/agenttool"
 )
 
 // Manager manages loaded AI tools

internal/toolrouter/loop.go

@@ -6,11 +6,11 @@ import (
 	"strings"
 	"time"
 
-	"meshtastic_mqtt_server/completion"
-	"meshtastic_mqtt_server/llm"
-	"meshtastic_mqtt_server/message"
-	"meshtastic_mqtt_server/stream"
-	"meshtastic_mqtt_server/toolmanager"
+	"meshtastic_mqtt_server/internal/completion"
+	"meshtastic_mqtt_server/internal/llm"
+	"meshtastic_mqtt_server/internal/message"
+	"meshtastic_mqtt_server/internal/stream"
+	"meshtastic_mqtt_server/internal/toolmanager"
 
 	"github.com/volcengine/volcengine-go-sdk/service/arkruntime/model"
 )

internal/toolrouter/state.go

@@ -5,7 +5,7 @@ import (
 	"fmt"
 	"strings"
 
-	"meshtastic_mqtt_server/llm"
+	"meshtastic_mqtt_server/internal/llm"
 )
 
 // Config holds the tool router configuration

internal/toolrouter/tools.go

@@ -6,10 +6,10 @@ import (
 	"strings"
 	"time"
 
-	"meshtastic_mqtt_server/agenttool"
-	"meshtastic_mqtt_server/llm"
-	"meshtastic_mqtt_server/stream"
-	"meshtastic_mqtt_server/toolmanager"
+	"meshtastic_mqtt_server/internal/agenttool"
+	"meshtastic_mqtt_server/internal/llm"
+	"meshtastic_mqtt_server/internal/stream"
+	"meshtastic_mqtt_server/internal/toolmanager"
 
 	"github.com/volcengine/volcengine-go-sdk/service/arkruntime/model"
 )

main.go

@@ -19,8 +19,8 @@ import (
 	"github.com/mochi-mqtt/server/v2/listeners"
 	"github.com/mochi-mqtt/server/v2/packets"
 
-	"meshtastic_mqtt_server/ai"
-	"meshtastic_mqtt_server/autoreply"
+	"meshtastic_mqtt_server/internal/ai"
+	"meshtastic_mqtt_server/internal/autoreply"
 	"meshtastic_mqtt_server/internal/auth"
 	blockingpkg "meshtastic_mqtt_server/internal/blocking"
 	botpkg "meshtastic_mqtt_server/internal/bot"
@@ -29,8 +29,8 @@ import (
 	rspkg "meshtastic_mqtt_server/internal/runtimesettings"
 	storepkg "meshtastic_mqtt_server/internal/store"
 	webpkg "meshtastic_mqtt_server/internal/web"
-	"meshtastic_mqtt_server/llm"
-	"meshtastic_mqtt_server/mqtpp"
+	"meshtastic_mqtt_server/internal/llm"
+	"meshtastic_mqtt_server/internal/mqtpp"
 )
 
 const (