feat: matrix-style subagent connection lines + smart window layout

Subagent windows now visually connect to their parent session tabs with
glowing matrix-green lines that pulse with life. Windows automatically
arrange in a non-overlapping grid, and each shows its origin with a
clickable "from [session]" header.

Watch your AI agents spawn and dance across the screen, tethered to
their creators by neon threads of digital consciousness.

Changes:
- Matrix green (#00ff41) connection lines with glow effect
- Smart grid positioning prevents window overlap
- Smaller default window size (420x350) for better density
- Auto-sizing activity columns for cleaner logs

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

package.json

@@ -1,6 +1,6 @@
 {
   "name": "claudeman",
-  "version": "0.1370",
+  "version": "0.1371",
   "description": "The missing control plane for Claude Code - run 20 autonomous agents with real-time monitoring and session persistence",
   "type": "module",
   "main": "dist/index.js",
@@ -55,8 +55,9 @@
     "@types/uuid": "^10.0.0",
     "@vitest/coverage-v8": "^4.0.17",
     "agent-browser": "^0.6.0",
+    "playwright": "^1.58.0",
     "tsx": "^4.15.0",
-    "typescript": "^5.5.0",
+    "typescript": "^5.9.3",
     "vitest": "^4.0.17"
   },
   "engines": {