TypeScript: add extensions to tsconfig and fix type errors (#12781)

* TypeScript: add extensions to tsconfig and fix type errors

- Add extensions/**/* to tsconfig.json includes
- Export ProviderAuthResult, AnyAgentTool from plugin-sdk
- Fix optional chaining for messageActions across channels
- Add missing type imports (MSTeamsConfig, GroupPolicy, etc.)
- Add type annotations for provider auth handlers
- Fix undici/fetch type compatibility in zalo proxy
- Correct ChannelAccountSnapshot property usage
- Add type casts for tool registrations
- Extract usage view styles and types to separate files

* TypeScript: fix optional debug calls and handleAction guards

src/channels/plugins/types.core.ts

@@ -125,6 +125,7 @@ export type ChannelAccountSnapshot = {
   botTokenSource?: string;
   appTokenSource?: string;
   credentialSource?: string;
+  secretSource?: string;
   audienceType?: string;
   audience?: string;
   webhookPath?: string;
@@ -139,6 +140,10 @@ export type ChannelAccountSnapshot = {
   audit?: unknown;
   application?: unknown;
   bot?: unknown;
+  publicKey?: string | null;
+  profile?: unknown;
+  channelAccessToken?: string;
+  channelSecret?: string;
 };
 
 export type ChannelLogSink = {
@@ -328,4 +333,5 @@ export type ChannelPollContext = {
   to: string;
   poll: PollInput;
   accountId?: string | null;
+  threadId?: string | null;
 };