More Go 1.25 vet fixes for windows-only code paths

- internal/frontend/desktop/windows/frontend.go: 5 more
  logger.Error(fmt.Sprintf("...", args...)) sites switched to direct
  logger.Error("...", args...) printf-style. These didn't match my
  earlier sed because the format strings have multiple args (not just
  err.Error()).
- internal/wv2installer/{download.go,wv2installer.go}: drop the now-
  unused "fmt" import after the previous switch from fmt.Errorf to
  errors.New.

GOOS=windows go vet ./... locally clean.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: leaanthony

v2/internal/frontend/desktop/windows/frontend.go

@@ -698,13 +698,13 @@ var edgeMap = map[string]uintptr{
 func (f *Frontend) processMessage(message string, sender *edge.ICoreWebView2, args *edge.ICoreWebView2WebMessageReceivedEventArgs) {
 	topSource, err := sender.GetSource()
 	if err != nil {
-		f.logger.Error(fmt.Sprintf("Unable to get source from sender: %s", err.Error()))
+		f.logger.Error("Unable to get source from sender: %s", err.Error())
 		return
 	}
 
 	senderSource, err := args.GetSource()
 	if err != nil {
-		f.logger.Error(fmt.Sprintf("Unable to get source from args: %s", err.Error()))
+		f.logger.Error("Unable to get source from args: %s", err.Error())
 		return
 	}
 
@@ -759,13 +759,13 @@ func (f *Frontend) processMessage(message string, sender *edge.ICoreWebView2, ar
 func (f *Frontend) processMessageWithAdditionalObjects(message string, sender *edge.ICoreWebView2, args *edge.ICoreWebView2WebMessageReceivedEventArgs) {
 	topSource, err := sender.GetSource()
 	if err != nil {
-		f.logger.Error(fmt.Sprintf("Unable to get source from sender: %s", err.Error()))
+		f.logger.Error("Unable to get source from sender: %s", err.Error())
 		return
 	}
 
 	senderSource, err := args.GetSource()
 	if err != nil {
-		f.logger.Error(fmt.Sprintf("Unable to get source from args: %s", err.Error()))
+		f.logger.Error("Unable to get source from args: %s", err.Error())
 		return
 	}
 
@@ -835,7 +835,7 @@ func (f *Frontend) processMessageWithAdditionalObjects(message string, sender *e
 func (f *Frontend) validBindingOrigin(source string) bool {
 	origin, err := f.originValidator.GetOriginFromURL(source)
 	if err != nil {
-		f.logger.Error(fmt.Sprintf("Error parsing source URL %s: %v", source, err.Error()))
+		f.logger.Error("Error parsing source URL %s: %v", source, err.Error())
 		return false
 	}
 	allowed := f.originValidator.IsOriginAllowed(origin)

v2/internal/wv2installer/download.go

@@ -5,7 +5,6 @@ package wv2installer
 
 import (
 	"errors"
-	"fmt"
 
 	"github.com/wailsapp/wails/v2/internal/webview2runtime"
 	"github.com/wailsapp/wails/v2/pkg/options/windows"

v2/internal/wv2installer/wv2installer.go

@@ -4,7 +4,6 @@ package wv2installer
 
 import (
 	"errors"
-	"fmt"
 
 	"github.com/wailsapp/go-webview2/webviewloader"
 	"github.com/wailsapp/wails/v2/pkg/options"