feat(agent): add addressable queue operations

packages/client/runtime/src/client/sessions/conversation.ts

@@ -7,7 +7,7 @@ import type { CommandId } from '@deepseek-ai/dsh-commands/brand'
 import type { ContentBlock } from '@deepseek-ai/dsh-llm/types'
 import type { TodoItem } from '@deepseek-ai/dsh-session/types'
 import type {
-  RpcError, SessionId, ToolCallView, ToolResultView,
+  InboxItemId, RpcError, SessionId, ToolCallView, ToolResultView,
 } from '@deepseek-ai/dsh-client-connection/client'
 import type { PendingInteraction } from './pending.ts'
 
@@ -185,10 +185,13 @@ export interface RunningToolCall {
 }
 
 
-/** One queued-message row mirrored from `session/queued` frames (key: the enqueueing prompt's rpcId when wire-sourced). */
+/** One independently addressable row from the transient queue snapshot. */
 export interface QueuedMessage {
-  readonly key: string
+  readonly id: InboxItemId
   readonly preview: string
+  /** Complete editable text; null when the message contains non-text blocks. */
+  readonly text: string | null
+  readonly placement: 'queued' | 'steering'
 }
 
 /** In-progress assistant output (chunk accumulator product). */
@@ -246,7 +249,7 @@ export interface ConversationSnapshot {
    */
   codeDispatches: ReadonlyMap<string, readonly CodeSubCall[]>
   pending: readonly PendingInteraction[]
-  /** Read-only inbox mirror (session/queued frames + mux-open baseline; cleared by the leave-running flip). */
+  /** Authoritative transient inbox snapshot, replaced after every host-side change. */
   queue: readonly QueuedMessage[]
   running: boolean
   /** Input-area shape (see {@link ComposerPhase}); derived here, switched on by consumers. */