feat(unity): enhance visual effects and animations

- Add cloud system with procedural sprites and parallax movement
- Add tree swaying animation for palm trees
- Improve agent breathing with squash & stretch animation
- Add jump animation routine for agent reactions
- Add custom CartoonWater shader support
- Add SetupVisuals editor tool and GlobalProfile asset
- Lower speech bubble alpha for glass effect

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

unity-client/Assets/Scripts/GameManager.cs

@@ -322,6 +322,7 @@ namespace TheIsland.Core
             if (_agentVisuals.TryGetValue(data.agent_id, out AgentVisual agentVisual))
             {
                 agentVisual.ShowSpeech(data.text);
+                agentVisual.DoJump(); // Add jump effect
             }
             // Check AgentUI (programmatic UI system)
             else if (_agentUIs.TryGetValue(data.agent_id, out AgentUI agentUI))