fix: harden identity, live access, drafts and setup (review only)

Source-reviewed hardening changes and regression tests. UNBUILT / UNTESTED: not a deployable release. Go formatting, compilation, automated regression tests, full frontend validation and staging acceptance remain required. See docs/hardening/VALIDATION.md. Main remains the original clean snapshot; no upstream Git history imported.

web/app/(dashboard)/dashboard/conversations/_components/agent-message-editor.tsx

@@ -1,3 +1,5 @@
+// Modified in the independent hardening fork; see docs/hardening/README.md.
+// Modified for AgentDeskFixes: retain operator drafts and forward pending-send state.
 "use client"
 
 import { useEffect, useRef, useState } from "react"
@@ -11,11 +13,14 @@ import {
   sendOperatorPresence,
   useAgentConversationsStore,
 } from "@/hooks/use-agent-conversation-realtime"
+import type { MessageEditorDraftStore } from "@/lib/message-editor-drafts"
 import { useI18n } from "@/i18n/provider"
 import { fetchQuickReplyListAll, type AdminQuickReply } from "@/lib/api/admin"
 import { suggestAgentReply } from "@/lib/api/agent"
 
 type AgentMessageEditorProps = {
+  draftStore: MessageEditorDraftStore
+  sending?: boolean
   disabled?: boolean
   uploadingAsset?: boolean
   onSend: (html: string) => Promise<void>
@@ -28,6 +33,8 @@ type AgentMessageEditorProps = {
  * Supports quick replies picker and slash command (/) autocomplete.
  */
 export function AgentMessageEditor({
+  draftStore,
+  sending = false,
   disabled = false,
   uploadingAsset = false,
   onSend,
@@ -79,6 +86,8 @@ export function AgentMessageEditor({
     <SharedMessageEditor
       variant="agent"
       conversationId={selectedConversationId}
+      draftStore={draftStore}
+      sending={sending}
       disabled={disabled}
       uploadingAsset={uploadingAsset}
       quickReplies={{