diff --git a/local-tool/Makefile b/local-tool/Makefile
index 5270df5..6b9f68e 100644
--- a/local-tool/Makefile
+++ b/local-tool/Makefile
@@ -28,7 +28,8 @@ PAYLOAD     := visiona-local/payload
         stage-macos stage-windows \
         wails-macos wails-windows wails-linux \
         dmg exe exe-only _run-iscc appimage \
-        dev dev-mock test lint fmt clean
+        dev dev-mock test lint fmt \
+        clean clean-all clean-build-exe clean-build-dmg clean-build-appimage
 
 # ── 幫助 ───────────────────────────────────────────────────────────
 help: ## 列出所有 make targets
@@ -551,3 +552,19 @@ clean: ## 清除 dist/ 與 payload/ 產物
 	@mkdir -p $(DIST) $(PAYLOAD)
 	@touch $(DIST)/.gitkeep $(PAYLOAD)/.gitkeep
 	@echo "Done."
+
+clean-all: clean ## 完整清除：dist/ payload/ wails build/ frontend build/ server embed
+	@echo "==> 清除 Wails build 產物..."
+	rm -rf visiona-local/build/bin
+	rm -rf visiona-local/build/darwin/Resources
+	rm -rf visiona-local/build/windows/Resources
+	@echo "==> 清除 frontend build 產物..."
+	rm -rf frontend/out
+	rm -rf frontend/.next
+	@echo "==> 清除 server 內嵌前端..."
+	rm -rf server/web/out
+	@echo "==> clean-all 完成"
+
+clean-build-exe: clean-all exe ## Windows：完整 clean + 從頭 build installer .exe（最乾淨的 build）
+clean-build-dmg: clean-all dmg ## macOS：完整 clean + 從頭 build installer .dmg
+clean-build-appimage: clean-all appimage ## Linux：完整 clean + 從頭 build installer .AppImage
diff --git a/local-tool/scripts/bootstrap-windows.ps1 b/local-tool/scripts/bootstrap-windows.ps1
index d135c5f..f178831 100644
--- a/local-tool/scripts/bootstrap-windows.ps1
+++ b/local-tool/scripts/bootstrap-windows.ps1
@@ -185,16 +185,25 @@ if ($msysIsccDir) {
 if ($msysIsccExe) {
     $bashParts += "export ISCC=`"$msysIsccExe`""
 }
-# 偵測前置產物是否已齊全 —— 齊全就走 fast path（只重跑 iscc），省 wails rebuild 幾分鐘
+# Build 模式：
+#   VISIONA_FAST=1   → 前置產物齊全時跳過 vendor/payload/wails，只重跑 iscc（debug iteration 用）
+#   預設             → 每次 clean build（wails build / server binary / frontend embed 全重做）
+#                       保留 vendor/ 快取（Python runtime / wheels / ffmpeg / yt-dlp）以免重下 200MB
 $fastPath = (Test-Path 'visiona-local\build\bin\visiona-local.exe') -and `
             (Test-Path 'payload\windows\bin\visiona-local-server.exe') -and `
             (Test-Path 'payload\windows\bin\ffmpeg.exe') -and `
             (Test-Path 'payload\windows\python\python.tar.gz')
 
-if ($fastPath -and ($Target -eq 'exe' -or -not $env:VISIONA_TARGET)) {
-    Log 'FAST PATH：前置產物齊全，跳過 vendor/payload/wails，只重跑 iscc 打包'
+if ($env:VISIONA_FAST -eq '1' -and $fastPath -and ($Target -eq 'exe' -or -not $env:VISIONA_TARGET)) {
+    Log 'FAST PATH：VISIONA_FAST=1 + 前置產物齊全，跳過 vendor/payload/wails，只重跑 iscc'
     $bashParts += 'make exe-only'
 } else {
+    Log '預設 clean build：每次重做 wails + server binary + frontend embed（vendor cache 保留）'
+    # 清 wails / frontend / server/web/out，但不清 vendor/（避免重下 Python / wheels / ffmpeg / yt-dlp 200MB+）
+    $bashParts += 'rm -rf visiona-local/build/bin visiona-local/build/windows/Resources'
+    $bashParts += 'rm -rf frontend/out frontend/.next server/web/out'
+    $bashParts += 'rm -rf payload/windows/bin/visiona-local-server.exe'
+    $bashParts += 'rm -rf dist/visiona-local-*-windows-x64.exe'
     $bashParts += 'make vendor-python-windows vendor-wheels-windows vendor-ffmpeg-windows vendor-ytdlp-windows'
     $bashParts += 'make payload-windows'
     switch ($Target) {
diff --git a/local-tool/visiona-local/app.go b/local-tool/visiona-local/app.go
index b31f16e..87921d5 100644
--- a/local-tool/visiona-local/app.go
+++ b/local-tool/visiona-local/app.go
@@ -112,9 +112,12 @@ func NewApp() *App {
 			mode = PythonModeAuto
 		}
 	}
+	// M7：預設真實硬體模式（使用者決策 Q8）
+	// 若要強制 mock 模式（無 Kneron 裝置環境下 debug），設環境變數 VISIONA_MOCK=1
+	mock := os.Getenv("VISIONA_MOCK") == "1"
 	return &App{
 		pythonMode: mode,
-		mockMode:   true, // M1 預設 mock（沒有真的 python/hardware）
+		mockMode:   mock,
 	}
 }
 
@@ -359,6 +362,7 @@ func (a *App) startServer() error {
 	// 6. spawn
 	cmd := exec.Command(binPath, args...)
 	cmd.Dir = filepath.Dir(binPath)
+	configureSysProcAttr(cmd) // Windows: CREATE_NO_WINDOW 藏掉 server 小黑窗
 
 	// 注入 bundle bin dir 給 server 偵測 ffmpeg / yt-dlp（M6）
 	env := os.Environ()
@@ -633,6 +637,7 @@ func (a *App) ensureBundledPython() (string, error) {
 	// 解壓 tarball（strip-components=1 剝掉 "python/" 前綴）
 	fmt.Fprintln(os.Stderr, "[visiona-local] extracting bundled python runtime...")
 	extract := exec.Command("tar", "-xzf", pyTarball, "-C", pyHome, "--strip-components=1")
+	configureSysProcAttr(extract)
 	if out, err := extract.CombinedOutput(); err != nil {
 		return "", fmt.Errorf("extract python tarball: %w (%s)", err, string(out))
 	}
@@ -646,7 +651,9 @@ func (a *App) ensureBundledPython() (string, error) {
 	}
 
 	fmt.Fprintln(os.Stderr, "[visiona-local] creating venv at", venvPath)
-	if out, err := exec.Command(embeddedPython, "-m", "venv", venvPath).CombinedOutput(); err != nil {
+	venvCmd := exec.Command(embeddedPython, "-m", "venv", venvPath)
+	configureSysProcAttr(venvCmd)
+	if out, err := venvCmd.CombinedOutput(); err != nil {
 		return "", fmt.Errorf("create venv: %w (%s)", err, string(out))
 	}
 
@@ -669,6 +676,7 @@ func (a *App) ensureBundledPython() (string, error) {
 	args := []string{"-m", "pip", "install", "--no-index", "--find-links", wheelsDir, "--prefer-binary"}
 	args = append(args, wheels...)
 	pipCmd := exec.Command(pythonBin, args...)
+	configureSysProcAttr(pipCmd)
 	if out, err := pipCmd.CombinedOutput(); err != nil {
 		return "", fmt.Errorf("pip install wheels: %w\n%s", err, string(out))
 	}
diff --git a/local-tool/visiona-local/platform_darwin.go b/local-tool/visiona-local/platform_darwin.go
index 58bc608..c1bb4f8 100644
--- a/local-tool/visiona-local/platform_darwin.go
+++ b/local-tool/visiona-local/platform_darwin.go
@@ -4,9 +4,13 @@ package main
 
 import (
 	"os"
+	"os/exec"
 	"path/filepath"
 )
 
+// configureSysProcAttr 在 macOS 上不需要特殊設定。
+func configureSysProcAttr(_ *exec.Cmd) {}
+
 // platformDataDir 回傳 macOS 的應用程式資料目錄。
 // ~/Library/Application Support/visiona-local
 func platformDataDir() string {
diff --git a/local-tool/visiona-local/platform_linux.go b/local-tool/visiona-local/platform_linux.go
index 0ee68ed..064b195 100644
--- a/local-tool/visiona-local/platform_linux.go
+++ b/local-tool/visiona-local/platform_linux.go
@@ -4,9 +4,13 @@ package main
 
 import (
 	"os"
+	"os/exec"
 	"path/filepath"
 )
 
+// configureSysProcAttr 在 Linux 上不需要特殊設定。
+func configureSysProcAttr(_ *exec.Cmd) {}
+
 // platformDataDir 回傳 Linux 的應用程式資料目錄（遵循 XDG）。
 // $XDG_DATA_HOME/visiona-local 或 ~/.local/share/visiona-local
 func platformDataDir() string {
diff --git a/local-tool/visiona-local/platform_windows.go b/local-tool/visiona-local/platform_windows.go
index 9d85885..0a32974 100644
--- a/local-tool/visiona-local/platform_windows.go
+++ b/local-tool/visiona-local/platform_windows.go
@@ -4,9 +4,22 @@ package main
 
 import (
 	"os"
+	"os/exec"
 	"path/filepath"
+	"syscall"
 )
 
+// configureSysProcAttr 設定子行程的 Windows 特有屬性。
+// CREATE_NO_WINDOW (0x08000000) 讓 server 子行程不彈 console 視窗（小黑窗）。
+// HideWindow 對某些情境也一起加保險。
+func configureSysProcAttr(cmd *exec.Cmd) {
+	if cmd.SysProcAttr == nil {
+		cmd.SysProcAttr = &syscall.SysProcAttr{}
+	}
+	cmd.SysProcAttr.HideWindow = true
+	cmd.SysProcAttr.CreationFlags |= 0x08000000 // CREATE_NO_WINDOW
+}
+
 // platformDataDir 回傳 Windows 的應用程式資料目錄。
 // %APPDATA%\visiona-local
 func platformDataDir() string {