diff --git a/packages/client/src/components/channels/Channel.svelte b/packages/client/src/components/channels/Channel.svelte
index 9bb37ad..b7da186 100644
--- a/packages/client/src/components/channels/Channel.svelte
+++ b/packages/client/src/components/channels/Channel.svelte
@@ -1,6 +1,5 @@
 <script lang="ts">
-  import { api, type Id } from "@packages/convex";
-  import type { Doc } from "@packages/convex/src/convex/_generated/dataModel";
+  import { api, type Doc, type Id } from "@packages/convex";
   import { useQuery } from "convex-svelte";
   import MessageInput from "../chat/MessageInput.svelte";
   import MessageList from "../chat/MessageList.svelte";
diff --git a/packages/client/src/components/channels/ChannelList.svelte b/packages/client/src/components/channels/ChannelList.svelte
index d5a3331..5911b35 100644
--- a/packages/client/src/components/channels/ChannelList.svelte
+++ b/packages/client/src/components/channels/ChannelList.svelte
@@ -7,15 +7,6 @@
     | { type: "chat"; selectedChannelId: Id<"channels"> | undefined }
     | { type: "personalization"; selectedChannelId: undefined };
 
-  /*<<<<<<< HEAD:packages/client/src/components/chat/ChannelList.svelte
-    screenMode: Selection;
-  }
-
-  let {
-    screenMode = $bindable(),
-  }: Props = $props();
-=======
-*/
   interface Props {
     organizationId: Id<"organizations">;
     screenMode: Selection;
@@ -45,7 +36,10 @@
               : "hover:bg-base-300",
           ].join(" ")}
           onclick={() => {
-            screenMode = { type: "chat", selectedChannelId: channel._id };
+            screenMode = {
+              type: "chat",
+              selectedChannelId: channel._id as Id<"channels">,
+            };
           }}
         >
           <div class="font-medium"># {channel.name}</div>
diff --git a/packages/client/src/components/chat/MessageInput.svelte b/packages/client/src/components/chat/MessageInput.svelte
index d3736b7..5107a20 100644
--- a/packages/client/src/components/chat/MessageInput.svelte
+++ b/packages/client/src/components/chat/MessageInput.svelte
@@ -1,12 +1,13 @@
 <script lang="ts">
-  import { api, type Id } from "@packages/convex";
-  import type { Doc } from "@packages/convex/src/convex/_generated/dataModel";
+  import { api, type Doc, type Id } from "@packages/convex";
   import { useConvexClient, useQuery } from "convex-svelte";
   import FilePreview from "~/features/files/upload/FilePreview.svelte";
   import FileSelector from "~/features/files/upload/Selector.svelte";
   import { FileUploader } from "~/features/files/upload/uploader.svelte";
+  import Attachment from "~/icons/attachment.svelte";
   import MdiClose from "~/icons/mdi-close.svelte";
   import { useMutation } from "~/lib/useMutation.svelte.ts";
+
   import EmojiPalette from "./EmojiPalette.svelte";
   import VoteMaker from "./VoteMaker.svelte";
 
@@ -33,11 +34,21 @@
   const convex = useConvexClient();
 
   let messageContent = $state("");
-  let authorName = $state("");
   let showEmojiPalette = $state(false);
   let showFileSelector = $state(false);
   let attachedFiles = $state<File[]>([]);
 
+  const clickable = $derived.by<boolean>(() => {
+    // post ongoing
+    if (sendMessageMutation.processing) return false;
+    // identity not loaded yet
+    if (!identity.data) return false;
+    // empty content
+    if (!messageContent.trim() && attachedFiles.length === 0 && !voteIsValid())
+      return false;
+    return true;
+  });
+
   let showVoteMaker = $state(false);
   let vote = $state<Vote>({
     title: "",
@@ -45,34 +56,27 @@
     voteOptions: [],
     voters: [],
   });
-
-  const personalization = useQuery(api.personalization.getPersonalization, {
-    organizationId: organizationId,
-  });
-
-  $effect(() => {
-    if (identity?.data && !authorName) {
-      authorName =
-        personalization.data?.nickname ??
-        identity.data.name ??
-        identity.data.email ??
-        "匿名";
-    }
-  });
+  function voteIsValid() {
+    if (!vote.title.trim()) return false;
+    if (vote.voteOptions.length === 0) return false;
+    if (vote.maxVotes === 0) return false;
+    return true;
+  }
 
   const uploader = new FileUploader(() => ({
     organizationId,
   }));
 
   async function sendMessage() {
-    if (!messageContent.trim() && attachedFiles.length === 0) return;
+    if (!clickable) return;
+    if (!identity.data) return;
 
     const attachments = (await uploader.uploadAll(attachedFiles)).map(
       (it) => it.id,
     );
 
     let voteId: Id<"votes"> | undefined;
-    if (vote.title.trim() && vote.voteOptions.length !== 0) {
+    if (voteIsValid()) {
       voteId = await convex.mutation(api.vote.addVote, {
         title: vote.title,
         maxVotes: vote.maxVotes,
@@ -83,7 +87,7 @@
     await sendMessageMutation.run({
       channelId,
       content: messageContent.trim() || "",
-      author: authorName.trim() || "匿名",
+      author: identity.data.name,
       parentId: replyingTo?._id ?? undefined,
       attachments,
       vote: voteId,
@@ -167,15 +171,7 @@
   {#if showVoteMaker}
     <VoteMaker bind:vote />
   {/if}
-
-  <div class="flex gap-2">
-    <input
-      type="text"
-      placeholder="ユーザー名"
-      class="input input-sm input-bordered w-32"
-      bind:value={authorName}
-    />
-  </div>
+  <div class="flex gap-2"></div>
 
   <div class="flex gap-2">
     <div class="flex-1 space-y-2">
@@ -195,19 +191,7 @@
           title="ファイルを添付"
           type="button"
         >
-          <svg
-            class="h-4 w-4"
-            fill="none"
-            stroke="currentColor"
-            viewBox="0 0 24 24"
-          >
-            <path
-              stroke-linecap="round"
-              stroke-linejoin="round"
-              stroke-width="2"
-              d="M15.172 7l-6.586 6.586a2 2 0 102.828 2.828l6.414-6.586a4 4 0 00-5.656-5.656l-6.415 6.585a6 6 0 108.486 8.486L20.5 13"
-            ></path>
-          </svg>
+          <Attachment />
           {showFileSelector ? "キャンセル" : "ファイル添付"}
         </button>
         <button
@@ -224,8 +208,7 @@
     <button
       class="btn btn-primary self-end"
       onclick={sendMessage}
-      disabled={(!messageContent.trim() && attachedFiles.length === 0) ||
-        sendMessageMutation.processing}
+      disabled={!clickable}
     >
       {#if sendMessageMutation.processing}
         <span class="loading loading-spinner loading-sm"></span>
diff --git a/packages/client/src/components/chat/MessageList.svelte b/packages/client/src/components/chat/MessageList.svelte
index 7811e9d..e92520f 100644
--- a/packages/client/src/components/chat/MessageList.svelte
+++ b/packages/client/src/components/chat/MessageList.svelte
@@ -1,6 +1,5 @@
 <script lang="ts">
-  import { api, type Id } from "@packages/convex";
-  import type { Doc } from "@packages/convex/src/convex/_generated/dataModel";
+  import { api, type Doc, type Id } from "@packages/convex";
   import { useQuery } from "convex-svelte";
   import { onMount } from "svelte";
   import Modal, { ModalManager } from "$lib/modal/modal.svelte";
diff --git a/packages/client/src/icons/attachment.svelte b/packages/client/src/icons/attachment.svelte
new file mode 100644
index 0000000..41fbe89
--- /dev/null
+++ b/packages/client/src/icons/attachment.svelte
@@ -0,0 +1,8 @@
+<svg class="h-4 w-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+  <path
+    stroke-linecap="round"
+    stroke-linejoin="round"
+    stroke-width="2"
+    d="M15.172 7l-6.586 6.586a2 2 0 102.828 2.828l6.414-6.586a4 4 0 00-5.656-5.656l-6.415 6.585a6 6 0 108.486 8.486L20.5 13"
+  ></path>
+</svg>
diff --git a/packages/convex/index.ts b/packages/convex/index.ts
index 2365bef..09cda48 100644
--- a/packages/convex/index.ts
+++ b/packages/convex/index.ts
@@ -1,5 +1,5 @@
 export { api } from "./src/convex/_generated/api";
-export type { Id } from "./src/convex/_generated/dataModel";
+export type { Doc, Id } from "./src/convex/_generated/dataModel";
 
 import type { DataModel } from "./src/convex/_generated/dataModel";
 export type Task = DataModel["tasks"]["document"];