feat(wire): 地基④ wire.go 接 vision/voice/mcp/skill/exec 五个子系统，从死代码变可用

- vision：model.Router 绑 WithVisionModel(LLM_VISION_MODEL)；vision.RegisterTools(VisualTool/OCRTool)
  用同一 OpenAICompatibleAdapter（LLM_BASE_URL 为空则跳过并 Warn）。
- voice：voice.New(cfg.Voice) Chain（cloud→local→edge-tts/espeak→silent）存 a.voice。
- mcp：读 cfg.MCP.ServersJSON → 逐 Enabled server mcp.NewRegistry(...).Register(ctx)（Connect+
  DiscoverTools+RegisterTool），注册 KindMCP 能力 mcp:<name> 供 adminListPlugins 枚举；
  close() 中 Unregister 防 stdio 子进程孤儿；每 server 15s connect 超时，失败 Warn 跳过。
- skills：LoadDir(configs/skills) → skills.Register 为 KindSkill（Runner.Run 仍 ErrRunPending，
  执行留后续）。
- exec/terminal：新 terminalTool(sdk.Tool) 内部调 execProv.Execute，注册进 dispatcher；
  ExecSandbox.Enabled=false 默认拦截（授权默认关）。
- config：LLMConfig 增 VisionModel(LLM_VISION_MODEL)；新增 MCPConfig/ServersJSON(MCPSERVERS_JSON)。
- 拆 5 个辅助文件（vision.go/voice.go/mcp.go/skills.go/terminal_tool.go）避免 wire.go 膨胀；
  wire.go 最终 535 行。

默认配置下各子系统干净跳过不阻断启动（LLM_BASE_URL 已配则 vision 用主模型降级）。
go build/vet/test 全绿（46 包），gofmt 干净。

cmd/cyrene/vision.go

@@ -0,0 +1,42 @@
+package main
+
+import (
+	"strings"
+
+	"git.yeij.top/AskaEth/Cyrene_v2/internal/logger"
+	"git.yeij.top/AskaEth/Cyrene_v2/internal/runtime/multimodal/vision"
+)
+
+// visionToolName and ocrToolName are the registered names of the vision and OCR
+// tools. They are bound to the tool registration here and advertised to the
+// agent by the tool dispatcher.
+const (
+	visionToolName = "vision"
+	ocrToolName    = "ocr"
+)
+
+// wireVision registers the vision and OCR tools and the vision model routing.
+//
+// The vision adapter is an OpenAI-compatible /chat/completions endpoint on the
+// same base URL as the chat LLM (LLM_BASE_URL), using the dedicated model
+// (LLM_VISION_MODEL) when set. When no base URL is configured the tools are
+// skipped with a warning so startup never blocks; the model router is still
+// bound to the vision model (in wireRuntime) whenever one is configured.
+func (a *app) wireVision() {
+	log := logger.WithSource(a.log, "cmd/cyrene")
+	if strings.TrimSpace(a.cfg.LLM.BaseURL) == "" {
+		log.Warn("vision/ocr tools skipped: no LLM base url configured")
+		return
+	}
+	adapter := vision.NewOpenAICompatible(a.cfg.LLM,
+		vision.WithModel(a.cfg.LLM.VisionModel),
+		vision.WithLogger(a.log))
+	if err := vision.RegisterTools(a.caps,
+		vision.NewVisionTool(visionToolName, adapter),
+		vision.NewOCRTool(ocrToolName, adapter),
+	); err != nil {
+		log.Warn("vision/ocr tool register skipped", "error", err)
+		return
+	}
+	log.Info("vision/ocr tools registered", "vision_model", a.cfg.LLM.VisionModel)
+}