fix(ai): refresh Xiaomi token plan model catalogs

Use the new provider-specific Xiaomi Token Plan catalogs from models.dev instead of cloning the API-billing Xiaomi catalog into every token-plan region. This removes API-billing-only models such as mimo-v2-omni from xiaomi-token-plan-{cn,ams,sgp}.

packages/ai/src/providers/mistral.models.ts

@@ -333,12 +333,12 @@ export const MISTRAL_MODELS = {
 		api: "mistral-conversations",
 		provider: "mistral",
 		baseUrl: "https://api.mistral.ai",
-		reasoning: false,
+		reasoning: true,
 		input: ["text", "image"],
 		cost: {
-			input: 0.4,
-			output: 2,
-			cacheRead: 0.04,
+			input: 1.5,
+			output: 7.5,
+			cacheRead: 0.15,
 			cacheWrite: 0,
 		},
 		contextWindow: 262144,