feat: implement Pi Switch i18n UI and agent config switch

src/types/index.ts

@@ -0,0 +1,57 @@
+export type Agent = "kimi_code" | "pi";
+
+export type ProviderType =
+  | "kimi"
+  | "anthropic"
+  | "openai"
+  | "openai_responses"
+  | "google-genai"
+  | "vertexai";
+
+export interface Provider {
+  name: string;
+  provider_type: ProviderType;
+  base_url: string | null;
+  api_key: string | null;
+  env: Record<string, string>;
+  /** Optional note / remark for the provider. */
+  note?: string | null;
+  /** Optional official website URL. */
+  official_url?: string | null;
+  /** Managed/OAuth providers skip credential validation. */
+  managed?: boolean;
+  /** Whether the provider is enabled/activated. */
+  enabled?: boolean;
+  /** Extra agent-specific provider fields preserved across edits. */
+  raw_other?: unknown;
+}
+
+export interface Model {
+  alias: string;
+  provider: string;
+  model: string;
+  max_context_size: number;
+  display_name: string | null;
+  /** Optional model role, e.g. Sonnet/Opus/Fable/Haiku for Claude-style mapping. */
+  role?: string | null;
+  /** Whether the model declares extended context / thinking support. */
+  supports_1m?: boolean;
+  /** Agent-specific capability flags (e.g. Kimi Code `capabilities`). */
+  capabilities?: string[];
+  /** Extra agent-specific model fields preserved across edits. */
+  raw_other?: unknown;
+}
+
+export interface Config {
+  default_model: string | null;
+  providers: Record<string, Provider>;
+  models: Record<string, Model>;
+  raw_other?: unknown;
+}
+
+/** A model discovered from a provider's API endpoint. */
+export interface DiscoveredModel {
+  id: string;
+  display_name: string | null;
+  max_context_size: number | null;
+}