feat: full auto-install chain for all platforms

- Wire ensure_claude_code() into cmd_update() — auto npm install if missing
- uclaude_install.sh: auto-install git, python3, curl via apt/dnf/yum/brew
- uclaude_update.bat: prereq checks with winget install suggestions
- uclaude_update.ps1: auto-install via winget (git, python, node)
- install_node(): macOS support via brew, RHEL/Fedora via rpm.nodesource
- Increased npm install timeout to 300s for slow connections

claude/uclaude_updater.py

@@ -92,16 +92,34 @@ def get_node_version():
 
 
 def install_node():
-    """Auto-install Node.js v24+ using the official nodesource setup."""
+    """Auto-install Node.js v24+ using the official nodesource setup (Linux) or brew (macOS)."""
     print(f"  {Y}Node.js v{'.'.join(map(str, MIN_NODE_VERSION))}+ required.{D}")
 
     if IS_WINDOWS:
         print(f"  {R}Please install Node.js manually: https://nodejs.org/{D}")
+        print(f"  Or run: winget install OpenJS.NodeJS")
         return False
 
+    if IS_MACOS:
+        print(f"  Installing Node.js via Homebrew...")
+        try:
+            result = subprocess.run(
+                ["brew", "install", "node"],
+                timeout=120, capture_output=True, text=True,
+            )
+            if result.returncode == 0:
+                ver = get_node_version()
+                if ver and ver >= MIN_NODE_VERSION:
+                    print(f"  {G}Node.js v{'.'.join(map(str, ver))} installed{D}")
+                    return True
+        except FileNotFoundError:
+            pass
+        eprint(f"  {R}Install Homebrew first: https://brew.sh/ then: brew install node{D}")
+        return False
+
+    # Linux — nodesource
     print(f"  Installing Node.js v24 via nodesource...")
     try:
-        # Use nodesource setup script
         result = subprocess.run(
             ["bash", "-c", "curl -fsSL https://deb.nodesource.com/setup_24.x | bash - && apt-get install -y nodejs"],
             timeout=120, capture_output=True, text=True,
@@ -112,7 +130,20 @@ def install_node():
                 print(f"  {G}Node.js v{'.'.join(map(str, ver))} installed{D}")
                 return True
 
-        # Fallback: try nvm-like approach or direct download
+        # Try dnf/yum fallback for RHEL/Fedora
+        for pkg_mgr in ["dnf", "yum"]:
+            if shutil.which(pkg_mgr):
+                result = subprocess.run(
+                    ["bash", "-c", f"curl -fsSL https://rpm.nodesource.com/setup_24.x | bash - && {pkg_mgr} install -y nodejs"],
+                    timeout=120, capture_output=True, text=True,
+                )
+                if result.returncode == 0:
+                    ver = get_node_version()
+                    if ver:
+                        print(f"  {G}Node.js v{'.'.join(map(str, ver))} installed{D}")
+                        return True
+                break
+
         eprint(f"  {R}Auto-install failed. Install manually: https://nodejs.org/{D}")
         if result.stderr:
             eprint(f"  {result.stderr.strip()[:200]}")
@@ -145,6 +176,43 @@ def ensure_node():
     return True
 
 
+# ============================================================
+#  Claude Code auto-install
+# ============================================================
+
+def ensure_claude_code():
+    """Install Claude Code via npm if not present. Returns True if OK."""
+    cli_js = find_cli_js()
+    if cli_js:
+        return True
+
+    print(f"  {Y}Claude Code not found. Installing via npm...{D}")
+    try:
+        result = subprocess.run(
+            ["npm", "install", "-g", "@anthropic-ai/claude-code"],
+            capture_output=True, text=True, timeout=300,
+        )
+        if result.returncode == 0:
+            cli_js = find_cli_js()
+            if cli_js:
+                print(f"  {G}Claude Code installed{D}")
+                return True
+
+        eprint(f"  {R}npm install failed{D}")
+        if result.stderr:
+            eprint(f"  {result.stderr.strip()[:300]}")
+        return False
+    except FileNotFoundError:
+        eprint(f"  {R}npm not found. Install Node.js first.{D}")
+        return False
+    except subprocess.TimeoutExpired:
+        eprint(f"  {R}npm install timed out{D}")
+        return False
+    except Exception as e:
+        eprint(f"  {R}Error: {e}{D}")
+        return False
+
+
 # ============================================================
 #  Version detection
 # ============================================================
@@ -589,7 +657,7 @@ def cmd_check():
     print(f"  Latest:    {latest or 'unknown'}")
 
     if not installed:
-        print(f"  {Y}Claude Code not found. Install it first: npm install -g @anthropic-ai/claude-code{D}")
+        print(f"  {Y}Claude Code not found. Run without --check to auto-install.{D}")
         return 1
 
     if not latest:
@@ -612,6 +680,11 @@ def cmd_update(force=False, settings_only=False):
     if not ensure_node():
         return 1
 
+    # Ensure Claude Code is installed (npm install if missing)
+    if not settings_only:
+        if not ensure_claude_code():
+            return 1
+
     installed, cli_js = get_installed_version()
 
     # Git pull to get latest artifacts
@@ -642,7 +715,7 @@ def cmd_update(force=False, settings_only=False):
         if not cli_js:
             cli_js = find_cli_js()
         if not cli_js:
-            eprint(f"  {R}Claude Code cli.js not found. Install Claude Code first.{D}")
+            eprint(f"  {R}Claude Code cli.js not found even after install attempt.{D}")
             return 1
 
         if not is_admin():