Add build-wiki command for isolated wiki generation

- Add BuildWikiWithOptions in native.go for building wiki from pre-existing topdata
- Add runBuildWiki and parseBuildWikiArgs in app.go for CLI integration
- Add --force flag to force rebuild even when output is current

internal/app/app.go

@@ -88,6 +88,11 @@ var commands = []command{
 		description: "Convert between 2DA and native topdata JSON/module formats.",
 		run:         runConvertTopData,
 	},
+	{
+		name:        "build-wiki",
+		description: "Build wiki pages from the current topdata state.",
+		run:         runBuildWiki,
+	},
 }
 
 func Run(args []string) (int, error) {
@@ -550,6 +555,46 @@ func runConvertTopData(ctx context) error {
 	return topdata.RunConvertCommand(ctx.args[1:], ctx.stdout)
 }
 
+func runBuildWiki(ctx context) error {
+	p, err := loadProject(ctx.cwd)
+	if err != nil {
+		return err
+	}
+
+	opts, err := parseBuildWikiArgs("build-wiki", ctx.args[1:])
+	if err != nil {
+		return err
+	}
+
+	result, err := topdata.BuildWikiWithOptions(p, opts, func(message string) {
+		fmt.Fprintf(ctx.stdout, "[build-wiki] %s\n", message)
+	})
+	if err != nil {
+		return err
+	}
+
+	fmt.Fprintf(ctx.stdout, "project: %s\n", p.Config.Module.Name)
+	fmt.Fprintf(ctx.stdout, "wiki output: %s\n", result.OutputDir)
+	fmt.Fprintf(ctx.stdout, "wiki pages: %d\n", result.PageCount)
+	fmt.Fprintf(ctx.stdout, "wiki status: %s\n", result.Status)
+	return nil
+}
+
+func parseBuildWikiArgs(commandName string, args []string) (topdata.BuildWikiOptions, error) {
+	opts := topdata.BuildWikiOptions{}
+	for _, arg := range args {
+		switch arg {
+		case "--force":
+			opts.Force = true
+		case "-h", "--help":
+			return opts, fmt.Errorf("usage: %s [--force]", commandName)
+		default:
+			return opts, fmt.Errorf("unknown %s argument %q", commandName, arg)
+		}
+	}
+	return opts, nil
+}
+
 func loadProject(cwd string) (*project.Project, error) {
 	root, err := project.FindRoot(cwd)
 	if err != nil {