feat: add AI knowledge analysis MVP

modules/ai/server/config.ts

@@ -0,0 +1,38 @@
+import { AI_KNOWLEDGE_EMBEDDING_DIMENSIONS } from "@/modules/core/server/schema";
+
+export type AiRuntimeConfig = {
+  baseUrl: string;
+  apiKey: string;
+  chatModel: string;
+  embeddingModel: string;
+  embeddingDimensions: number;
+};
+
+export type AiRuntimeConfigResult =
+  | { success: true; config: AiRuntimeConfig }
+  | { success: false; reason: string };
+
+const DEFAULT_CHAT_MODEL = "gpt-4.1-mini";
+const DEFAULT_EMBEDDING_MODEL = "text-embedding-3-small";
+
+function readOptionalEnv(name: string): string {
+  return process.env[name]?.trim() ?? "";
+}
+
+export function getAiRuntimeConfig(): AiRuntimeConfigResult {
+  const apiKey = readOptionalEnv("AI_API_KEY");
+  if (!apiKey) {
+    return { success: false, reason: "AI_API_KEY 未配置" };
+  }
+
+  return {
+    success: true,
+    config: {
+      baseUrl: readOptionalEnv("AI_BASE_URL"),
+      apiKey,
+      chatModel: readOptionalEnv("AI_CHAT_MODEL") || DEFAULT_CHAT_MODEL,
+      embeddingModel: readOptionalEnv("AI_EMBEDDING_MODEL") || DEFAULT_EMBEDDING_MODEL,
+      embeddingDimensions: AI_KNOWLEDGE_EMBEDDING_DIMENSIONS,
+    },
+  };
+}