feat: implement AI chat interface with markdown support and model cost tracking

.claude/settings.json

@@ -32,7 +32,8 @@
       "Bash(xargs wc:*)",
       "Bash(ls /c/Users/Michael/VSCODE/CollectFlow/.next/static/chunks/*.css)",
       "Bash(find /c/Users/Michael/VSCODE/CollectFlow/src/app/api -type f \\\\\\( -name \"*.ts\" -o -name \"*.tsx\" \\\\\\) -exec ls -lh {} \\\\;)",
-      "Bash(curl -s \"https://api.ffnancy.fr/api/commandes-auto\")"
+      "Bash(curl -s \"https://api.ffnancy.fr/api/commandes-auto\")",
+      "Bash(npm install:*)"
     ]
   }
 }