feat(pages): add AI-powered landing page content generator

Enable automatic landing page content generation using AI:
- Generate hero, features, stats, and CTAs from README
- Blog section configuration in settings UI
- Extract repository metadata for AI context
- Merge generated content while preserving existing settings
- User-friendly generation button in settings panel

routers/web/repo/setting/pages.go

@@ -9,7 +9,10 @@ import (
 	"strings"
 
 	repo_model "code.gitcaddy.com/server/v3/models/repo"
+	"code.gitcaddy.com/server/v3/modules/ai"
+	"code.gitcaddy.com/server/v3/modules/git"
 	"code.gitcaddy.com/server/v3/modules/json"
+	"code.gitcaddy.com/server/v3/modules/log"
 	pages_module "code.gitcaddy.com/server/v3/modules/pages"
 	"code.gitcaddy.com/server/v3/modules/templates"
 	"code.gitcaddy.com/server/v3/services/context"
@@ -84,6 +87,7 @@ func setCommonPagesData(ctx *context.Context) {
 	ctx.Data["PagesURL"] = pages_service.GetPagesURL(ctx.Repo.Repository)
 	ctx.Data["PagesTemplates"] = pages_module.ValidTemplates()
 	ctx.Data["PagesTemplateNames"] = pages_module.TemplateDisplayNames()
+	ctx.Data["AIEnabled"] = ai.IsEnabled()
 }
 
 // Pages shows the repository pages settings (General page)
@@ -193,6 +197,30 @@ func PagesPost(ctx *context.Context) {
 		} else {
 			ctx.Flash.Success(ctx.Tr("repo.settings.pages.domain_verified"))
 		}
+	case "ai_generate":
+		readme := loadRawReadme(ctx, ctx.Repo.Repository)
+		generated, err := pages_service.GenerateLandingPageContent(ctx, ctx.Repo.Repository, readme)
+		if err != nil {
+			log.Error("AI landing page generation failed: %v", err)
+			ctx.Flash.Error(ctx.Tr("repo.settings.pages.ai_generate_failed"))
+			ctx.Redirect(ctx.Repo.Repository.Link() + "/settings/pages")
+			return
+		}
+		// Merge AI-generated content into existing config, preserving settings
+		config := getPagesLandingConfig(ctx)
+		config.Brand.Name = generated.Brand.Name
+		config.Brand.Tagline = generated.Brand.Tagline
+		config.Hero = generated.Hero
+		config.Stats = generated.Stats
+		config.ValueProps = generated.ValueProps
+		config.Features = generated.Features
+		config.CTASection = generated.CTASection
+		config.SEO = generated.SEO
+		if err := savePagesLandingConfig(ctx, config); err != nil {
+			ctx.ServerError("SavePagesConfig", err)
+			return
+		}
+		ctx.Flash.Success(ctx.Tr("repo.settings.pages.ai_generate_success"))
 	default:
 		ctx.NotFound(nil)
 		return
@@ -267,6 +295,12 @@ func PagesContentPost(ctx *context.Context) {
 	config.Navigation.ShowRepository = ctx.FormBool("nav_show_repository")
 	config.Navigation.ShowReleases = ctx.FormBool("nav_show_releases")
 	config.Navigation.ShowIssues = ctx.FormBool("nav_show_issues")
+	config.Blog.Enabled = ctx.FormBool("blog_enabled")
+	config.Blog.Headline = ctx.FormString("blog_headline")
+	config.Blog.Subheadline = ctx.FormString("blog_subheadline")
+	if maxPosts := ctx.FormInt("blog_max_posts"); maxPosts > 0 {
+		config.Blog.MaxPosts = maxPosts
+	}
 	config.Stats = nil
 	for i := range 10 {
 		value := ctx.FormString(fmt.Sprintf("stat_value_%d", i))
@@ -454,3 +488,38 @@ func PagesThemePost(ctx *context.Context) {
 	ctx.Flash.Success(ctx.Tr("repo.settings.pages.saved"))
 	ctx.Redirect(ctx.Repo.Repository.Link() + "/settings/pages/theme")
 }
+
+// loadRawReadme loads the raw README content from the repository for AI consumption
+func loadRawReadme(ctx *context.Context, repo *repo_model.Repository) string {
+	gitRepo, err := git.OpenRepository(ctx, repo.RepoPath())
+	if err != nil {
+		return ""
+	}
+	defer gitRepo.Close()
+
+	branch := repo.DefaultBranch
+	if branch == "" {
+		branch = "main"
+	}
+
+	commit, err := gitRepo.GetBranchCommit(branch)
+	if err != nil {
+		return ""
+	}
+
+	for _, name := range []string{"README.md", "readme.md", "README", "README.txt"} {
+		entry, err := commit.GetTreeEntryByPath(name)
+		if err != nil {
+			continue
+		}
+		reader, err := entry.Blob().DataAsync()
+		if err != nil {
+			continue
+		}
+		content := make([]byte, entry.Blob().Size())
+		_, _ = reader.Read(content)
+		reader.Close()
+		return string(content)
+	}
+	return ""
+}