Update README: fix Gemini hook format, add toasty mascot

- Fix Gemini CLI hook example to use flat structure (no nested hooks array)
- Add toasty mascot image at top of README

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

Author: shanselman

README.md

@@ -1,5 +1,7 @@
 # Toasty
 
+<img src="icons/toasty.png" alt="Toasty mascot" width="128" align="right">
+
 A tiny Windows toast notification CLI that knows how to hook into Coding Agents so you get notified when their long running tasks are finished. 229 KB, no dependencies.
 
 ## Quick Start
@@ -134,13 +136,9 @@ Add to `~/.gemini/settings.json`:
   "hooks": {
     "AfterAgent": [
       {
-        "hooks": [
-          {
-            "type": "command",
-            "command": "C:\\path\\to\\toasty.exe \"Gemini finished\"",
-            "timeout": 5000
-          }
-        ]
+        "type": "command",
+        "command": "C:\\path\\to\\toasty.exe \"Gemini finished\"",
+        "timeout": 5000
       }
     ]
   }