fix: use --version instead of --help in installer scripts

The installer scripts were using --help to pre-download ha-mcp
dependencies, but ha-mcp didn't support --help (only --version
was added in the previous commit).

This was causing the Windows installer test to fail.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: julienld

scripts/install-macos.sh

@@ -157,7 +157,7 @@ printf "\n"
 # Step 3: Pre-download dependencies
 printf "${YELLOW}Step 3: Pre-downloading ha-mcp...${NC}\n"
 printf "  This speeds up Claude Desktop startup...\n"
-"$UVX_PATH" ha-mcp@latest --help > /dev/null 2>&1 || true
+"$UVX_PATH" ha-mcp@latest --version > /dev/null 2>&1 || true
 printf "${GREEN}  Dependencies cached${NC}\n"
 printf "\n"
 

scripts/install-windows.ps1

@@ -114,7 +114,7 @@ Write-Host ""
 Write-Host "Step 3: Pre-downloading ha-mcp..." -ForegroundColor Yellow
 Write-Host "  This speeds up Claude Desktop startup..."
 try {
-    & uvx ha-mcp@latest --help 2>&1 | Out-Null
+    & uvx ha-mcp@latest --version 2>&1 | Out-Null
     Write-Host "  Dependencies cached" -ForegroundColor Green
 } catch {
     Write-Host "  Pre-download skipped (will download on first use)" -ForegroundColor Yellow