feat(installer): add Windows installer build scripts

.github/workflows/docker-image.yml

@@ -44,6 +44,7 @@ jobs:
         with:
           context: .
           file: ./Dockerfile
+          platforms: linux/amd64,linux/arm64
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}

installer/README.md

@@ -0,0 +1,97 @@
+# MiroFish Windows Installer
+
+This directory contains scripts to build Windows executable installers for MiroFish.
+
+## Prerequisites
+
+- Windows 10 or later
+- PowerShell 5.1+
+- Python 3.9+ (for embedded mode)
+- Node.js 18+ (for frontend build)
+- [Inno Setup](https://jrsoftware.org/isinfo.php) (optional, for creating setup.exe)
+
+## Build Methods
+
+### Method 1: Embedded Python Mode (Recommended)
+
+Smaller file size (~200-300MB), faster build:
+
+```powershell
+.\installer\build.ps1
+```
+
+### Method 2: PyInstaller Mode
+
+Self-contained executable, but larger file size (~1GB+):
+
+```powershell
+.\installer\build.ps1 -PyInstaller
+```
+
+## Build Options
+
+```powershell
+# Skip frontend build (if unchanged)
+.\installer\build.ps1 -SkipFrontend
+
+# Skip backend processing (if unchanged)
+.\installer\build.ps1 -SkipBackend
+
+# Skip installer creation (only generate executables)
+.\installer\build.ps1 -SkipInstaller
+
+# Clean old builds and start fresh
+.\installer\build.ps1 -Clean
+```
+
+## Output
+
+- `dist/MiroFish_Setup_0.1.1.exe` - Windows installer
+- `dist/MiroFish_Portable/` - Portable version (no installation required)
+
+## Installation Flow
+
+1. User downloads and runs `MiroFish_Setup_0.1.1.exe`
+2. Setup wizard prompts for API key
+3. Installation completes
+4. User can launch via desktop shortcut or start menu
+5. Browser opens automatically to `http://localhost:5000`
+
+## File Structure
+
+```
+installer/
+├── build.ps1           # Main build script
+├── setup.iss           # Inno Setup configuration
+├── embedded/           # Embedded Python files
+│   ├── python.zip      # Python runtime
+│   └── requirements.txt
+├── assets/             # Installer assets
+│   ├── icon.ico        # Application icon
+│   └── banner.bmp      # Setup wizard banner
+└── templates/          # Configuration templates
+    ├── config.json.template
+    └── start.ps1.template
+```
+
+## Development
+
+To modify the installer:
+
+1. Edit `build.ps1` for build process changes
+2. Edit `setup.iss` for installer UI changes
+3. Edit `start.ps1.template` for launch behavior changes
+
+## Troubleshooting
+
+### Build fails with "Python not found"
+Ensure Python 3.9+ is in your PATH:
+```powershell
+python --version
+```
+
+### Build fails with "Inno Setup not found"
+Install Inno Setup from https://jrsoftware.org/isdl.php
+
+### Installer too large
+Use `-SkipFrontend` if frontend hasn't changed, or use embedded mode instead of PyInstaller.