feat(frontend): public channels, self-excluded member picker, editable display name

- create-channel modal: Public checkbox (default off), self excluded from
  member list (creator auto-added), shows member display names
- Settings modal to edit your own display name
- members panel shows names and marks (you)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/auth/AuthContext.tsx

@@ -2,7 +2,7 @@ import { useMemo, useState } from 'react'
 import type { PropsWithChildren } from 'react'
 import { clearAuthSession, getAuthSession, isAccessTokenStale, setAuthSession } from '../lib/auth-storage'
 import type { AuthSession } from '../lib/auth-storage'
-import { loginCenter, logoutCenter, meGuildsCenter, refreshCenter } from '../lib/center-auth-client'
+import { loginCenter, logoutCenter, meGuildsCenter, refreshCenter, updateMeNameCenter } from '../lib/center-auth-client'
 import { AuthContext } from './auth-context'
 import type { AuthContextValue } from './auth-context'
 
@@ -72,6 +72,22 @@ export function AuthProvider({ children }: PropsWithChildren) {
         setAuthSession(next)
         setSession(next)
       },
+      updateName: async (name: string) => {
+        if (!session) return
+        const accessToken = (await (async () => {
+          if (!isAccessTokenStale(session.accessToken)) return session.accessToken
+          const refreshed = await refreshCenter(session.centerApiBase, session.refreshToken)
+          return refreshed.accessToken
+        })())
+        const updated = await updateMeNameCenter(session.centerApiBase, accessToken, name)
+        const next: AuthSession = {
+          ...session,
+          accessToken,
+          user: { ...session.user, name: updated.name },
+        }
+        setAuthSession(next)
+        setSession(next)
+      },
     }),
     [session],
   )

src/auth/auth-context.ts

@@ -8,6 +8,7 @@ export type AuthContextValue = {
   logout: () => Promise<void>
   ensureFreshToken: () => Promise<string | null>
   refreshGuilds: () => Promise<void>
+  updateName: (name: string) => Promise<void>
 }
 
 export const AuthContext = createContext<AuthContextValue | null>(null)

src/lib/auth-storage.ts

@@ -7,6 +7,7 @@ export type AuthSession = {
   user: {
     id: string
     email: string
+    name: string
   }
   guilds: Array<{
     nodeId: string

src/lib/center-auth-client.ts

@@ -8,7 +8,7 @@ type LoginResponse = {
   refreshToken: string
   tokenType: string
   expiresIn?: number
-  user: { id: string; email: string }
+  user: { id: string; email: string; name: string }
   guilds: Array<{ nodeId: string; name: string; endpoint: string; status: 'active' | 'offline' | 'revoked' }>
   guildAccessTokens: Array<{ guildNodeId: string; token: string; tokenType: string; expiresIn?: number }>
 }
@@ -74,10 +74,23 @@ export async function guildMembersCenter(
   centerApiBase: string,
   accessToken: string,
   guildNodeId: string,
-): Promise<Array<{ userId: string; email: string; status: string }>> {
+): Promise<Array<{ userId: string; email: string; name: string; status: string }>> {
-  const res = await centerClient(centerApiBase).get<Array<{ userId: string; email: string; status: string }>>(
+  const res = await centerClient(centerApiBase).get<Array<{ userId: string; email: string; name: string; status: string }>>(
     `/auth/guilds/${encodeURIComponent(guildNodeId)}/members`,
     { headers: { Authorization: `Bearer ${accessToken}` } },
   )
   return Array.isArray(res.data) ? res.data : []
 }
+
+export async function updateMeNameCenter(
+  centerApiBase: string,
+  accessToken: string,
+  name: string,
+): Promise<{ id: string; email: string; name: string }> {
+  const res = await centerClient(centerApiBase).patch<{ id: string; email: string; name: string }>(
+    '/auth/me',
+    { name },
+    { headers: { Authorization: `Bearer ${accessToken}` } },
+  )
+  return res.data
+}

src/pages/ChatPage.tsx

@@ -12,10 +12,10 @@ type MessageItem = {
 }
 
 type GuildChannel = { id: string; name: string; guildId?: string }
-type MemberItem = { userId: string; email: string; status: string }
+type MemberItem = { userId: string; email: string; name: string; status: string }
 
 export default function ChatPage() {
-  const { session, logout, ensureFreshToken, refreshGuilds } = useAuth()
+  const { session, logout, ensureFreshToken, refreshGuilds, updateName } = useAuth()
   const [selectedGuildId, setSelectedGuildId] = useState('')
   const [selectedChannelId, setSelectedChannelId] = useState('')
   const [channels, setChannels] = useState<GuildChannel[]>([])
@@ -26,7 +26,10 @@ export default function ChatPage() {
   const [newChannelName, setNewChannelName] = useState('')
   const [joinGuildNodeId, setJoinGuildNodeId] = useState('')
   const [selectedMemberIds, setSelectedMemberIds] = useState<string[]>([])
+  const [newChannelPublic, setNewChannelPublic] = useState(false)
   const [showCreateChannelModal, setShowCreateChannelModal] = useState(false)
+  const [showSettingsModal, setShowSettingsModal] = useState(false)
+  const [settingsName, setSettingsName] = useState('')
   const [showGuilds, setShowGuilds] = useState(true)
   const [showChannels, setShowChannels] = useState(true)
   const [showMembers, setShowMembers] = useState(true)
@@ -153,12 +156,14 @@ export default function ChatPage() {
       const payload = {
         name: newChannelName.trim(),
         guildId: effectiveGuildId,
+        isPublic: newChannelPublic,
         memberUserIds: selectedMemberIds,
       }
       const res = await guildApi().post('/channels', payload)
       const createdId = res.data?.id as string | undefined
       setNewChannelName('')
       setSelectedMemberIds([])
+      setNewChannelPublic(false)
       setShowCreateChannelModal(false)
       await loadChannels()
       if (createdId) setSelectedChannelId(createdId)
@@ -167,6 +172,21 @@ export default function ChatPage() {
     }
   }
 
+  async function saveName() {
+    const trimmed = settingsName.trim()
+    if (!trimmed) {
+      setError('Name must not be empty')
+      return
+    }
+    try {
+      await updateName(trimmed)
+      setShowSettingsModal(false)
+      await loadMembers()
+    } catch {
+      setError('Failed to update name')
+    }
+  }
+
   useEffect(() => {
     void loadMembers()
     setSelectedMemberIds([])
@@ -263,7 +283,12 @@ export default function ChatPage() {
           <h3>Members</h3>
           <ul className="list-reset">
             {members.map((m) => (
-              <li key={m.userId}><span className="muted">{m.email}</span></li>
+              <li key={m.userId}>
+                <span className="muted">
+                  {m.name || m.email}
+                  {m.userId === session?.user.id ? ' (you)' : ''}
+                </span>
+              </li>
             ))}
           </ul>
         </div>
@@ -274,7 +299,16 @@ export default function ChatPage() {
         <button className="btn btn-secondary" onClick={() => setShowChannels((v) => !v)}>{showChannels ? 'Hide v2' : 'Show v2'}</button>
         <button className="btn btn-secondary" onClick={() => setShowMembers((v) => !v)}>{showMembers ? 'Hide v4' : 'Show v4'}</button>
         <button className="btn btn-secondary" onClick={() => void logout()}>Logout</button>
-        <button className="btn btn-secondary" type="button">Settings</button>
+        <button
+          className="btn btn-secondary"
+          type="button"
+          onClick={() => {
+            setSettingsName(session?.user.name ?? '')
+            setShowSettingsModal(true)
+          }}
+        >
+          Settings
+        </button>
       </div>
 
       {showCreateChannelModal ? (
@@ -282,12 +316,25 @@ export default function ChatPage() {
           <div className="modal-card" onClick={(e) => e.stopPropagation()}>
             <h3>Create channel</h3>
             <input className="input" value={newChannelName} onChange={(e) => setNewChannelName(e.target.value)} placeholder="Channel name" />
-            <p className="muted" style={{ marginTop: 8 }}>Select members to include</p>
+            <label className="row-wrap" style={{ alignItems: 'center', marginTop: 8 }}>
+              <input type="checkbox" checked={newChannelPublic} onChange={(e) => setNewChannelPublic(e.target.checked)} />
+              <span>Public (visible to all guild members)</span>
+            </label>
+            <p className="muted" style={{ marginTop: 8 }}>
+              {newChannelPublic ? 'You are added automatically; all guild members can see it.' : 'You are added automatically. Select members to include'}
+            </p>
             <div className="modal-list">
-              {members.map((m) => (
+              {members
+                .filter((m) => m.userId !== session?.user.id)
+                .map((m) => (
                   <label key={m.userId} className="row-wrap" style={{ alignItems: 'center' }}>
-                  <input type="checkbox" checked={selectedMemberIds.includes(m.userId)} onChange={() => toggleMember(m.userId)} />
+                    <input
-                  <span>{m.email}</span>
+                      type="checkbox"
+                      checked={selectedMemberIds.includes(m.userId)}
+                      disabled={newChannelPublic}
+                      onChange={() => toggleMember(m.userId)}
+                    />
+                    <span>{m.name || m.email}</span>
                   </label>
                 ))}
             </div>
@@ -299,6 +346,26 @@ export default function ChatPage() {
         </div>
       ) : null}
 
+      {showSettingsModal ? (
+        <div className="modal-backdrop" onClick={() => setShowSettingsModal(false)}>
+          <div className="modal-card" onClick={(e) => e.stopPropagation()}>
+            <h3>Settings</h3>
+            <p className="muted">Signed in as {session?.user.email}</p>
+            <p className="muted" style={{ marginTop: 8 }}>Display name</p>
+            <input
+              className="input"
+              value={settingsName}
+              onChange={(e) => setSettingsName(e.target.value)}
+              placeholder="Your name"
+            />
+            <div className="row-wrap" style={{ marginTop: 12 }}>
+              <button className="btn" onClick={saveName}>Save</button>
+              <button className="btn btn-secondary" onClick={() => setShowSettingsModal(false)}>Cancel</button>
+            </div>
+          </div>
+        </div>
+      ) : null}
+
       {error ? (
         <div className="modal-backdrop" onClick={() => setError('')}>
           <div className="modal-card" onClick={(e) => e.stopPropagation()}>