Add cleanup, minor fixes

frontend/src/pages/AuthPage.jsx

@@ -33,7 +33,7 @@ export default function AuthPage({ onAuthenticated }) {
   return (
     <div className="center-screen">
       <form className="card auth-card" onSubmit={submit}>
-        <h1 className="brand-lg">goChat</h1>
+        <h1 className="brand-lg">uPortal</h1>
         <div className="mode-switch">
           <button
             type="button"

frontend/src/pages/RoomsPage.jsx

@@ -1,11 +1,13 @@
 import React, { useCallback, useEffect, useRef, useState } from 'react'
 import { api } from '../api.js'
 
-function slugify(value) {
+// Room names are case-sensitive on the Jitsi side, so we only trim, collapse
+// disallowed characters into a dash, and strip leading/trailing dashes. Case is
+// preserved (e.g. "DailyStandup" stays "DailyStandup").
+function sanitizeRoomName(value) {
   return value
     .trim()
-    .toLowerCase()
-    .replace(/[^a-z0-9-_]+/g, '-')
+    .replace(/[^a-zA-Z0-9-_]+/g, '-')
     .replace(/^-+|-+$/g, '')
 }
 
@@ -34,7 +36,7 @@ export default function RoomsPage({ room: routeRoom, onNavigate }) {
   }, [loadHistory])
 
   const enter = useCallback(async (roomName) => {
-    const target = slugify(roomName)
+    const target = sanitizeRoomName(roomName)
     if (!target) {
       setError('Enter a room name')
       return
@@ -59,7 +61,7 @@ export default function RoomsPage({ room: routeRoom, onNavigate }) {
       entered.current = null
       return
     }
-    const target = slugify(routeRoom)
+    const target = sanitizeRoomName(routeRoom)
     if (target && target !== entered.current) {
       entered.current = target
       enter(target)
@@ -68,7 +70,7 @@ export default function RoomsPage({ room: routeRoom, onNavigate }) {
 
   const submit = (event) => {
     event.preventDefault()
-    const target = slugify(room)
+    const target = sanitizeRoomName(room)
     if (!target) {
       setError('Enter a room name')
       return