feat: 内置 ai_image 插件接入 llmsproxy 生图端点

- 新增 internal/plugins/ai_image（开箱即用，纯 Go，无外部依赖）：
  - 注册 ai_image_generate 工具，POST base_url + /images/generations
  - 配置项 base_url(默认 http://127.0.0.1:8081/v1)/api_key(留空回落 core.llm.api_key)/model/size
  - 兼容 OpenAI /v1/images/generations 响应（url 与 b64_json）
- plugins/all.go 注册 ai_image
- 生图上游由 llmsproxy 侧后续配置（HomeAgent 直达其端点）

验证: go build/test 全绿；部署后 ai_image 加载、工具注册、agent 可调用

internal/plugins/ai_image/plugin.go

@@ -0,0 +1,219 @@
+package aiimage
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"strings"
+	"time"
+
+	"gitcode.com/JianFeeeee/HomeAgent/internal/plugin"
+	sdk "gitcode.com/JianFeeeee/HomeAgent/internal/sdk"
+)
+
+func init() {
+	plugin.RegisterPluginMeta("ai_image", "AI 生图", "AI Image")
+	plugin.RegisterFactory("ai_image", func(name string, config map[string]interface{}) (sdk.Plugin, error) {
+		return New(name), nil
+	})
+}
+
+type Plugin struct {
+	name    string
+	client  *http.Client
+	apiKey  string
+	baseURL string
+	model   string
+	size    string
+}
+
+func New(name string) *Plugin {
+	return &Plugin{
+		name:   name,
+		client: &http.Client{Timeout: 120 * time.Second},
+	}
+}
+
+func (p *Plugin) Name() string { return p.name }
+
+func getSettingString(s sdk.SettingsAPI, key, def string) string {
+	if s == nil {
+		return def
+	}
+	v, err := s.Get(key)
+	if err != nil || v == nil {
+		return def
+	}
+	if sv, ok := v.(string); ok && sv != "" {
+		return sv
+	}
+	return def
+}
+
+func (p *Plugin) Start(s *sdk.PluginSDK) error {
+	s.SetAutoRestart(true)
+
+	s.Settings().RegisterDef(sdk.ConfigDef{
+		Key: "base_url", Default: "http://127.0.0.1:8081/v1", Type: "string",
+		DisplayName: "Base URL", Description: "OpenAI 兼容生图网关地址（默认本机 llmsproxy）",
+		Category: "ai_image",
+	})
+	s.Settings().RegisterDef(sdk.ConfigDef{
+		Key: "api_key", Default: "", Type: "password",
+		DisplayName: "API Key", Description: "生图网关 API Key（默认使用内核 LLM key，留空则取 core.llm.api_key）",
+		Category: "ai_image",
+	})
+	s.Settings().RegisterDef(sdk.ConfigDef{
+		Key: "model", Default: "", Type: "string",
+		DisplayName: "Model", Description: "生图模型 ID，留空由网关 AUTO 决定（如 flux-1）",
+		Category: "ai_image",
+	})
+	s.Settings().RegisterDef(sdk.ConfigDef{
+		Key: "size", Default: "1024x1024", Type: "string",
+		DisplayName: "Size", Description: "默认图片尺寸，如 1024x1024",
+		Category: "ai_image",
+	})
+
+	p.apiKey = getSettingString(s.Settings(), "api_key", "")
+	p.baseURL = strings.TrimRight(getSettingString(s.Settings(), "base_url", "http://127.0.0.1:8081/v1"), "/")
+	p.model = getSettingString(s.Settings(), "model", "")
+	p.size = getSettingString(s.Settings(), "size", "1024x1024")
+
+	if p.apiKey == "" {
+		if v, _ := s.Settings().GetCore("llm.api_key"); v != nil {
+			if sv, ok := v.(string); ok && sv != "" {
+				p.apiKey = sv
+			}
+		}
+	}
+
+	s.RegisterTool("ai_image_generate", sdk.ToolDef{
+		Name: "ai_image_generate", Description: "Generate image from text prompt using AI. Returns image URL.",
+		Parameters: map[string]interface{}{
+			"type": "object",
+			"properties": map[string]interface{}{
+				"prompt": map[string]interface{}{"type": "string", "description": "Text description of the image to generate"},
+				"size":   map[string]interface{}{"type": "string", "description": "Image size (1024x1024, etc.), default from config"},
+				"model":  map[string]interface{}{"type": "string", "description": "Model override (e.g. flux-1)"},
+				"n":      map[string]interface{}{"type": "integer", "description": "Number of images to generate (1-10), default 1"},
+			},
+			"required": []string{"prompt"},
+		},
+	}, p.handleGenerate)
+
+	return nil
+}
+
+func (p *Plugin) Stop() error { return nil }
+
+type genRequest struct {
+	Model          string `json:"model"`
+	Prompt         string `json:"prompt"`
+	N              int    `json:"n"`
+	Size           string `json:"size"`
+	ResponseFormat string `json:"response_format"`
+}
+
+type genResp struct {
+	Created int64 `json:"created"`
+	Data    []struct {
+		URL           string `json:"url"`
+		B64JSON       string `json:"b64_json"`
+		RevisedPrompt string `json:"revised_prompt"`
+	} `json:"data"`
+	Error *struct {
+		Message string `json:"message"`
+		Type    string `json:"type"`
+	} `json:"error"`
+}
+
+func (p *Plugin) handleGenerate(args map[string]interface{}) (interface{}, error) {
+	prompt, _ := args["prompt"].(string)
+	if strings.TrimSpace(prompt) == "" {
+		return map[string]interface{}{"isError": true, "content": "prompt is required"}, nil
+	}
+
+	key := p.apiKey
+	if key == "" {
+		return map[string]interface{}{"isError": true, "content": "生图 API key 未配置（plugin.ai_image.api_key 或 core.llm.api_key）"}, nil
+	}
+
+	model := p.model
+	if m, ok := args["model"].(string); ok && m != "" {
+		model = m
+	}
+	size := p.size
+	if sz, ok := args["size"].(string); ok && sz != "" {
+		size = sz
+	}
+	n := 1
+	if nv, ok := args["n"].(float64); ok {
+		n = int(nv)
+		if n < 1 {
+			n = 1
+		}
+		if n > 10 {
+			n = 10
+		}
+	}
+
+	body := genRequest{Model: model, Prompt: prompt, N: n, Size: size, ResponseFormat: "url"}
+	raw, _ := json.Marshal(body)
+
+	url := p.baseURL + "/images/generations"
+	req, err := http.NewRequest(http.MethodPost, url, bytes.NewReader(raw))
+	if err != nil {
+		return map[string]interface{}{"isError": true, "content": "构造请求失败: " + err.Error()}, nil
+	}
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("Authorization", "Bearer "+key)
+
+	resp, err := p.client.Do(req)
+	if err != nil {
+		return map[string]interface{}{"isError": true, "content": "生图请求失败: " + err.Error()}, nil
+	}
+	defer resp.Body.Close()
+
+	respBody, _ := io.ReadAll(resp.Body)
+	if resp.StatusCode != 200 {
+		return map[string]interface{}{"isError": true, "content": fmt.Sprintf("生图 API error (status %d): %s", resp.StatusCode, string(respBody))}, nil
+	}
+
+	var result genResp
+	if err := json.Unmarshal(respBody, &result); err != nil {
+		return map[string]interface{}{"isError": true, "content": "解析生图响应失败: " + err.Error()}, nil
+	}
+	if result.Error != nil {
+		return map[string]interface{}{"isError": true, "content": "生图 API error: " + result.Error.Message}, nil
+	}
+	if len(result.Data) == 0 {
+		return map[string]interface{}{"isError": true, "content": "no images returned"}, nil
+	}
+
+	var urls []string
+	var saved []string
+	for i, d := range result.Data {
+		imgURL := d.URL
+		if imgURL == "" && d.B64JSON != "" {
+			imgURL = "data:image/png;base64," + d.B64JSON
+		}
+		if imgURL != "" {
+			urls = append(urls, imgURL)
+		}
+		if i == 0 {
+			saved = append(saved, imgURL)
+		}
+	}
+	if len(urls) == 0 {
+		return map[string]interface{}{"isError": true, "content": "生图响应中没有可用图片"}, nil
+	}
+
+	return map[string]interface{}{
+		"content": fmt.Sprintf("Generated %d image(s) with model %s:\n%s", len(urls), model, strings.Join(urls, "\n")),
+		"images":  urls,
+		"prompt":  prompt,
+		"model":   model,
+	}, nil
+}

internal/plugins/all.go

@@ -2,13 +2,14 @@ package plugins
 
 import (
 	_ "gitcode.com/JianFeeeee/HomeAgent/internal/plugins/agentcli"
+	_ "gitcode.com/JianFeeeee/HomeAgent/internal/plugins/ai_image"
 	_ "gitcode.com/JianFeeeee/HomeAgent/internal/plugins/cfgmgr"
+	_ "gitcode.com/JianFeeeee/HomeAgent/internal/plugins/clawhubadapter"
 	_ "gitcode.com/JianFeeeee/HomeAgent/internal/plugins/cli"
 	_ "gitcode.com/JianFeeeee/HomeAgent/internal/plugins/cmd"
 	_ "gitcode.com/JianFeeeee/HomeAgent/internal/plugins/files"
 	_ "gitcode.com/JianFeeeee/HomeAgent/internal/plugins/healthcheck"
 	_ "gitcode.com/JianFeeeee/HomeAgent/internal/plugins/mcp"
-	_ "gitcode.com/JianFeeeee/HomeAgent/internal/plugins/clawhubadapter"
 	_ "gitcode.com/JianFeeeee/HomeAgent/internal/plugins/pluginmgr"
 	_ "gitcode.com/JianFeeeee/HomeAgent/internal/plugins/timer"
 	_ "gitcode.com/JianFeeeee/HomeAgent/internal/plugins/webui"