Add Claude Desktop configurator and redesign dock UI (#18)

* Add Claude Desktop configurator and redesign dock UI

- Add Claude Desktop client (npx mcp-remote bridge for stdio-only Desktop)
- Redesign dock: single client dropdown instead of per-client rows
- Add dev-mode toggle (persisted in EditorSettings) to hide debug controls
- Show manual-command panel with Copy button when auto-configure fails
- Resolve claude CLI via login-shell fallback for GUI-launched Godot
- Add Dock button for floating panels (emits close_requested to redock)
- Remove redundant section headers, bump remaining header font sizes
- Add script/open-godot-here for worktree-aware Godot launches
- Document manual config commands for all 4 clients in README

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* Add dock screenshot to README

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* Simplify: dedupe, cache, and remove hot-path waste

- Extract _read_json_config/_write_json_config shared by Claude Desktop + Antigravity
- Cache _find_claude_cli() to avoid subprocess spawns on dropdown change
- Replace _pretty_client_name with String.capitalize()
- Event-driven redock detection (NOTIFICATION_PARENTED) instead of per-frame polling
- Guard _update_log() when log section is hidden
- Extract COLOR_MUTED/COLOR_HEADER constants for magic color literals
- Remove _refresh_setup_status side effect from _apply_dev_mode_visibility

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* Fix cyclic reference: use static var for Color constants

GDScript const with Color() on a class_name class triggers cyclic
reference errors. The replace_all also accidentally replaced the
values in the declarations themselves. Fix both issues.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* Use SHELL for login-shell CLI resolution instead of hardcoded bash

macOS defaults to zsh — PATH entries in .zshrc would not be found
via /bin/bash. Use SHELL env var with /bin/bash as fallback.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: dsarno

CLAUDE.md

@@ -85,6 +85,12 @@ Test suites extend `McpTestSuite` (assertion methods: `assert_true`, `assert_eq`
 3. Plugin starts the server automatically; logs should show `Session connected`
 4. Use `/mcp` in Claude Code to connect
 
+**Worktree gotcha**: each working tree (main checkout or git worktree) has its own
+`test_project/addons/godot_ai` symlink pointing to *that tree's* `plugin/`. If you
+edit a worktree's plugin but Godot is running on the main repo's `test_project/`,
+your changes won't appear there. Use `script/open-godot-here` to launch Godot on the
+current working tree's `test_project/`.
+
 ## Pre-commit smoke test
 
 **Always do this before every commit.** Python mocks don't catch GDScript bugs, editor API regressions, or undo/redo issues.

README.md

@@ -38,14 +38,58 @@ In Godot: **Project > Project Settings > Plugins** — enable **Godot AI**.
 
 The plugin will automatically start the MCP server, connect over WebSocket, and show status in the **Godot AI** dock.
 
+<p align="center"><img src="docs/images/dock.png" alt="Godot AI dock" width="320"></p>
+
 ### 3. Connect your MCP client
 
-Click a **Configure** button in the dock, or point any HTTP MCP client at:
+Pick a client in the dock's **Clients** dropdown and press **Configure**. The
+plugin writes the right config for:
 
-```text
-http://127.0.0.1:8000/mcp
+- **Claude Code** (CLI)
+- **Claude Desktop** (via `npx mcp-remote` bridge)
+- **Codex**
+- **Antigravity**
+
+If auto-configure can't find the client's CLI (GUI-launched editors have
+limited PATH), the dock shows a **Run this manually** panel with a copyable
+command — or use the commands below directly.
+
+<details>
+<summary><strong>Manual configuration</strong></summary>
+
+Server URL: `http://127.0.0.1:8000/mcp`
+
+**Claude Code** (CLI):
+```bash
+claude mcp add --scope user --transport http godot-ai http://127.0.0.1:8000/mcp
+```
+
+**Claude Desktop** — edit `~/Library/Application Support/Claude/claude_desktop_config.json`
+(macOS) or `%APPDATA%\Claude\claude_desktop_config.json` (Windows) and add under
+`mcpServers`:
+```json
+"godot-ai": {
+  "command": "npx",
+  "args": ["-y", "mcp-remote", "http://127.0.0.1:8000/mcp"]
+}
+```
+Requires Node.js (`npx`). Restart Claude Desktop after editing.
+
+**Codex** — edit `~/.codex/config.toml` and add:
+```toml
+[mcp_servers."godot-ai"]
+url = "http://127.0.0.1:8000/mcp"
+enabled = true
+```
+
+**Antigravity** — edit `~/.gemini/antigravity/mcp_config.json` and add under
+`mcpServers`:
+```json
+"godot-ai": { "serverUrl": "http://127.0.0.1:8000/mcp", "disabled": false }
 ```
 
+</details>
+
 ### 4. Try it
 
 - *"Show me the current scene hierarchy."*