refactor(windows): remove default profile, ccs runs claude directly

Changes:
- ccs.ps1: When profile is "default", run claude directly without profile lookup
- install.ps1: Remove default profile from config.json
- install.ps1: Remove ~/.claude/settings.json creation
- install.ps1: Update quick start messages

Behavior:
- `ccs` → runs `claude` directly (no profile switching)
- `ccs son` → switches to Sonnet profile
- `ccs glm` → switches to GLM profile

Rationale:
- Windows Claude CLI doesn't use settings.json files
- No need for default profile file that would never be used
- Simpler and cleaner for Windows users

ccs.ps1

@@ -12,6 +12,22 @@ param(
 
 $ErrorActionPreference = "Stop"
 
+# Special case: "default" profile just runs claude directly (no profile switching)
+if ($Profile -eq "default") {
+    try {
+        if ($RemainingArgs) {
+            & claude @RemainingArgs
+        } else {
+            & claude
+        }
+        exit $LASTEXITCODE
+    } catch {
+        Write-Host "Error: Failed to execute claude" -ForegroundColor Red
+        Write-Host $_.Exception.Message
+        exit 1
+    }
+}
+
 # Config file location (supports environment variable override)
 $ConfigFile = if ($env:CCS_CONFIG) {
     $env:CCS_CONFIG

install.ps1

@@ -205,7 +205,6 @@ if (-not (Test-Path $ConfigFile)) {
         profiles = @{
             glm = "~/.ccs/glm.settings.json"
             son = "~/.ccs/sonnet.settings.json"
-            default = "~/.claude/settings.json"
         }
     }
 
@@ -232,16 +231,6 @@ if (-not (Test-Path $SonnetSettings)) {
     Write-Host "|  [OK] Sonnet profile exists: $SonnetSettings"
 }
 
-# Ensure default profile settings file exists
-$DefaultSettings = "$ClaudeDir\settings.json"
-if (-not (Test-Path $DefaultSettings)) {
-    New-Item -ItemType Directory -Force -Path $ClaudeDir | Out-Null
-    @{ env = @{} } | ConvertTo-Json -Depth 10 | Set-Content $DefaultSettings
-    Write-Host "|  [OK] Created default settings: $DefaultSettings"
-} else {
-    Write-Host "|  [OK] Default profile exists: $DefaultSettings"
-}
-
 Write-Host "└─"
 Write-Host ""
 
@@ -282,15 +271,15 @@ if ($CurrentProvider -eq "claude") {
     Write-Host "   Quick start:"
     Write-Host "     ccs son       # Claude Sonnet (current)"
     Write-Host "     ccs glm       # GLM (after adding API key)"
-    Write-Host "     ccs           # Default profile"
+    Write-Host "     ccs           # Default (no profile)"
 } elseif ($CurrentProvider -eq "glm") {
     Write-Host "   Quick start:"
     Write-Host "     ccs glm       # GLM (current)"
     Write-Host "     ccs son       # Claude Sonnet"
-    Write-Host "     ccs           # Default profile"
+    Write-Host "     ccs           # Default (no profile)"
 } else {
     Write-Host "   Quick start:"
-    Write-Host "     ccs           # Default profile"
+    Write-Host "     ccs           # Default (no profile)"
     Write-Host "     ccs son       # Claude Sonnet"
     Write-Host "     ccs glm       # GLM (after adding API key)"
 }