feat: add TypeScript installation wizard with @clack/prompts TUI

Replace bash mosaic-init with a modern 9-stage wizard:
- SOUL.md identity, USER.md profile, TOOLS.md configuration
- Runtime detection (Claude, Codex, OpenCode) + MCP setup
- Skills catalog with categorized selection
- Quick Start and Advanced modes
- HeadlessPrompter for --non-interactive and CI usage
- ConfigService abstraction layer for future DB migration
- Bundled as single dist/mosaic-wizard.mjs via tsdown
- mosaic init now prefers wizard when Node.js is available
- 30 tests covering stages, templates, and integration

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

remote-install.sh

@@ -37,8 +37,21 @@ if [ ! -f "$WORK_DIR/bootstrap/install.sh" ]; then
   exit 1
 fi
 
-echo "[mosaic] Running install..."
 cd "$WORK_DIR/bootstrap"
+
+# Prefer TypeScript wizard if Node.js 18+ and bundle are available
+WIZARD_BIN="$WORK_DIR/bootstrap/dist/mosaic-wizard.mjs"
+if command -v node >/dev/null 2>&1 && [ -f "$WIZARD_BIN" ]; then
+  NODE_MAJOR="$(node -e 'console.log(process.versions.node.split(".")[0])')"
+  if [ "$NODE_MAJOR" -ge 18 ] 2>/dev/null; then
+    echo "[mosaic] Running wizard installer (Node.js $NODE_MAJOR detected)..."
+    node "$WIZARD_BIN" --source-dir "$WORK_DIR/bootstrap"
+    echo "[mosaic] Cleaning up temporary files..."
+    exit 0
+  fi
+fi
+
+echo "[mosaic] Running legacy install..."
 bash install.sh
 
 echo "[mosaic] Cleaning up temporary files..."