Address some review comments

Author: dahlia

docs/concepts/events.md

@@ -485,9 +485,6 @@ The `Vote` object contains the following properties:
 `~Vote.message`
 :   The poll message that was voted on.
 
-Note that for multiple choice polls, each option selection creates a separate
-`Vote` object, even if the same user selects multiple options.
-
 > [!TIP]
 > You can check if a poll allows multiple selections by accessing the
 > `vote.poll.multiple` property:

examples/otp.tsx

@@ -203,7 +203,7 @@ app.post("/authenticate", async (c) => {
   const form = await c.req.formData();
   const messageId = form.get("messageId")?.toString();
   if (messageId == null) return c.notFound();
-  const key = await kv.get<string>(["emojis", messageId]);
+  const key = await kv.get<string[]>(["emojis", messageId]);
   if (key?.value == null) return c.notFound();
   const emojis = new Set(key.value);
   const answer = new Set<string>();

src/bot-impl.ts

@@ -746,7 +746,7 @@ export class BotImpl<TContextData> implements Bot<TContextData> {
       await this.onVote(session, vote);
       const update = new Update({
         id: new URL(
-          `#update-votes/${Date.now()}`,
+          `#update-votes/${crypto.randomUUID()}`,
           updatedQuestion.id ?? ctx.origin,
         ),
         actor: ctx.getActorUri(this.identifier),

src/session-impl.ts

@@ -265,6 +265,15 @@ export class SessionImpl<TContextData> implements Session<TContextData> {
     let voters: number | null = null;
     let endTime: Temporal.Instant | null = null;
     if ("class" in options && options.class === Question && "poll" in options) {
+      if (options.poll.options.length < 2) {
+        throw new TypeError("At least two options are required in a poll.");
+      } else if (
+        new Set(options.poll.options).size != options.poll.options.length
+      ) {
+        throw new TypeError("Duplicate options are not allowed in a poll.");
+      } else if (options.poll.options.some((o) => o.trim() === "")) {
+        throw new TypeError("Poll options cannot be empty.");
+      }
       const pollOptions = options.poll.options.map((option) =>
         new Note({
           name: option,