msteams: add typingIndicator config and prevent duplicate DM typing indicator (#60771)

* msteams: add typingIndicator config and avoid duplicate DM typing

* fix(msteams): validate typingIndicator config

* fix(msteams): stop streaming before Teams timeout

* fix(msteams): classify expired streams correctly

* fix(msteams): handle link text from html attachments

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Co-authored-by: Brad Groux <bradgroux@users.noreply.github.com>

src/config/types.msteams.ts

@@ -90,6 +90,8 @@ export type MSTeamsConfig = {
   textChunkLimit?: number;
   /** Chunking mode: "length" (default) splits by size; "newline" splits on every newline. */
   chunkMode?: "length" | "newline";
+  /** Send native Teams typing indicator before replies. Default: true for groups/channels; DMs use informative stream status. */
+  typingIndicator?: boolean;
   /** Enable progressive block-by-block message delivery instead of a single reply. */
   blockStreaming?: boolean;
   /** Merge streamed block replies before sending. */

src/config/zod-schema.providers-core.ts

@@ -1534,6 +1534,7 @@ export const MSTeamsConfigSchema = z
     contextVisibility: ContextVisibilityModeSchema.optional(),
     textChunkLimit: z.number().int().positive().optional(),
     chunkMode: z.enum(["length", "newline"]).optional(),
+    typingIndicator: z.boolean().optional(),
     blockStreaming: z.boolean().optional(),
     blockStreamingCoalesce: BlockStreamingCoalesceSchema.optional(),
     mediaAllowHosts: z.array(z.string()).optional(),