feat: implement AI bouquet generation flow with Gemini/OpenAI

* feat: scaffold message, generating, and map pages and align header steps

* feat: implement AI bouquet generation flow with Gemini/OpenAI

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Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

package.json

@@ -29,5 +29,9 @@
 		"svelte": "^5.55.2",
 		"tailwindcss": "^4.2.2",
 		"vite": "^8.0.7"
+	},
+	"dependencies": {
+		"@google/generative-ai": "^0.24.1",
+		"openai": "^6.42.0"
 	}
 }