fix: add Windows support for Claude CLI detection

Previously, the Claude CLI detection failed on Windows due to:

1. Shell command incompatibility
   - Used 'which claude || where claude 2>/dev/null' which fails on Windows
   - 'which' doesn't exist on Windows
   - '2>/dev/null' is Unix syntax (Windows uses '2>nul')
   - Now uses platform-specific commands: 'where' on Windows, 'which' on Unix

2. Missing Windows fallback paths
   - Only checked Unix paths like ~/.local/bin/claude
   - Added Windows-specific paths:
     * %USERPROFILE%\.local\bin\claude.exe
     * %APPDATA%\npm\claude.cmd
     * %USERPROFILE%\.npm-global\bin\claude.cmd

3. Credentials file detection
   - Only checked for 'credentials.json'
   - Claude CLI on Windows uses '.credentials.json' (hidden file)
   - Now checks both '.credentials.json' and 'credentials.json'

Additional improvements:
- Handle 'where' command returning multiple paths (takes first match)
- Maintains full backward compatibility with Linux and macOS

apps/server/src/routes/setup/get-claude-status.ts

@@ -17,12 +17,15 @@ export async function getClaudeStatus() {
   let cliPath = "";
   let method = "none";
 
-  // Try to find Claude CLI
+  const isWindows = process.platform === "win32";
+
+  // Try to find Claude CLI using platform-specific command
   try {
-    const { stdout } = await execAsync(
+    // Use 'where' on Windows, 'which' on Unix-like systems
-      "which claude || where claude 2>/dev/null"
+    const findCommand = isWindows ? "where claude" : "which claude";
-    );
+    const { stdout } = await execAsync(findCommand);
-    cliPath = stdout.trim();
+    // 'where' on Windows can return multiple paths - take the first one
+    cliPath = stdout.trim().split(/\r?\n/)[0];
     installed = true;
     method = "path";
 
@@ -34,8 +37,18 @@ export async function getClaudeStatus() {
       // Version command might not be available
     }
   } catch {
-    // Not in PATH, try common locations
+    // Not in PATH, try common locations based on platform
-    const commonPaths = [
+    const commonPaths = isWindows
+      ? [
+          // Windows-specific paths
+          path.join(os.homedir(), ".local", "bin", "claude.exe"),
+          path.join(os.homedir(), "AppData", "Roaming", "npm", "claude.cmd"),
+          path.join(os.homedir(), "AppData", "Roaming", "npm", "claude"),
+          path.join(os.homedir(), ".npm-global", "bin", "claude.cmd"),
+          path.join(os.homedir(), ".npm-global", "bin", "claude"),
+        ]
+      : [
+          // Unix (Linux/macOS) paths
           path.join(os.homedir(), ".local", "bin", "claude"),
           path.join(os.homedir(), ".claude", "local", "claude"),
           "/usr/local/bin/claude",
@@ -124,8 +137,14 @@ export async function getClaudeStatus() {
     // Settings file doesn't exist
   }
 
-  // Check for credentials file (OAuth tokens from claude login) - legacy/alternative auth
+  // Check for credentials file (OAuth tokens from claude login)
-  const credentialsPath = path.join(claudeDir, "credentials.json");
+  // Note: Claude CLI may use ".credentials.json" (hidden) or "credentials.json" depending on version/platform
+  const credentialsPaths = [
+    path.join(claudeDir, ".credentials.json"),
+    path.join(claudeDir, "credentials.json"),
+  ];
+
+  for (const credentialsPath of credentialsPaths) {
     try {
       const credentialsContent = await fs.readFile(credentialsPath, "utf-8");
       const credentials = JSON.parse(credentialsContent);
@@ -142,8 +161,10 @@ export async function getClaudeStatus() {
         auth.authenticated = true;
         auth.method = "api_key"; // Stored API key in credentials file
       }
+      break; // Found and processed credentials file
     } catch {
-    // No credentials file or invalid format
+      // No credentials file at this path or invalid format
+    }
   }
 
   // Environment variables override stored credentials (higher priority)