Update README: remove Codex/Cursor references

Simplify supported tools list to Claude, Copilot, and Gemini.
Remove -i/--icon flag from docs (still works, just not advertised).

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

Author: shanselman

README.md

@@ -20,8 +20,7 @@ toasty --status
 
 Options:
   -t, --title <text>   Set notification title (default: "Notification")
-  --app <name>         Use AI CLI preset (claude, copilot, gemini, codex, cursor)
-  -i, --icon <path>    Custom icon path (PNG recommended, 48x48px)
+  --app <name>         Use AI CLI preset (claude, copilot, gemini)
   -h, --help           Show this help
   --install [agent]    Install hooks for AI CLI agents (claude, gemini, copilot, or all)
   --uninstall          Remove hooks from all AI CLI agents
@@ -31,14 +30,12 @@ Options:
 
 ## AI CLI Auto-Detection
 
-Toasty automatically detects when it's called from a known AI tool and applies the appropriate icon and title. No flags needed!
+Toasty automatically detects when it's called from a known AI CLI tool and applies the appropriate icon and title. No flags needed!
 
 **Auto-detected tools:**
-- Claude Code / Claude CLI
-- GitHub Copilot CLI
+- Claude Code
+- GitHub Copilot
 - Google Gemini CLI
-- OpenAI Codex CLI
-- Cursor IDE
 
 ```cmd
 # Called from Claude - automatically uses Claude preset
@@ -55,16 +52,9 @@ Override auto-detection with `--app`:
 ```cmd
 toasty "Processing finished" --app claude
 toasty "Build succeeded" --app copilot
+toasty "Query done" --app gemini
 ```
 
-### Custom Icons
-
-```cmd
-toasty "Task complete" -i "C:\path\to\icon.png"
-```
-
-Icons should be 48x48 pixels PNG for best results.
-
 ## One-Click Hook Installation
 
 Toasty can automatically configure AI CLI agents to show notifications when tasks complete.