feat(themes): implement PlanForce

internal/modules/themes/themes.go

@@ -4,7 +4,6 @@ package themes
 import (
 	"bytes"
 	"context"
-	"errors"
 	"fmt"
 	"io/fs"
 	"os"
@@ -116,5 +115,45 @@ func (m Module) Verify(ctx context.Context) error {
 }
 
 func (m Module) PlanForce(ctx context.Context) (module.Plan, error) {
-	return module.Plan{}, errors.New("PlanForce not implemented")
+	dst, err := destRoot()
+	if err != nil {
+		return module.Plan{}, err
+	}
+	var pairs []filePair
+	err = filepath.WalkDir(m.cfg.Source, func(p string, d fs.DirEntry, werr error) error {
+		if werr != nil {
+			return werr
+		}
+		if d.IsDir() {
+			return nil
+		}
+		rel, _ := filepath.Rel(m.cfg.Source, p)
+		pairs = append(pairs, filePair{src: p, dst: filepath.Join(dst, rel)})
+		return nil
+	})
+	if err != nil && !os.IsNotExist(err) {
+		return module.Plan{}, err
+	}
+	if len(pairs) == 0 {
+		return module.Plan{}, nil
+	}
+	return module.Plan{Actions: []module.Action{{
+		Description: fmt.Sprintf("rewrite %d theme files (force)", len(pairs)),
+		Kind:        module.ActionFileWrite,
+		Exec: func(ctx context.Context) error {
+			for _, fp := range pairs {
+				if err := os.MkdirAll(filepath.Dir(fp.dst), 0o755); err != nil {
+					return err
+				}
+				data, err := os.ReadFile(fp.src)
+				if err != nil {
+					return err
+				}
+				if err := os.WriteFile(fp.dst, data, 0o644); err != nil {
+					return err
+				}
+			}
+			return nil
+		},
+	}}}, nil
 }