[eric] tiny dead-code sweep — drop unused langchain pins from requirements.txt (saves ~5MB on packaged build) plus a few orphan exports left

over from past iterations (temp_state slice fields, clipboard timestamp getter, three never-imported lastSeq helpers).

frontend/src/shared/dashboardClipboard.ts

@@ -13,22 +13,15 @@ export interface ClipboardCard {
 }
 
 let clipboardCards: ClipboardCard[] = [];
-let clipboardTimestamp = 0;
 
 export function setClipboardCards(cards: ClipboardCard[]): void {
   clipboardCards = cards;
-  clipboardTimestamp = Date.now();
 }
 
 export function getClipboardCards(): ClipboardCard[] {
   return clipboardCards;
 }
 
-export function getClipboardTimestamp(): number {
-  return clipboardTimestamp;
-}
-
 export function clearClipboard(): void {
   clipboardCards = [];
-  clipboardTimestamp = 0;
 }

frontend/src/shared/state/tempStateSlice.ts

@@ -2,14 +2,12 @@
 import { createSlice, PayloadAction } from '@reduxjs/toolkit';
 
 interface TempState {
-  temp_state: string | null;
   pendingBrowserUrl: string | null;
   pendingFocusAgentId: string | null;
   lastDashboardId: string | null;
 }
 
 const initialState: TempState = {
-  temp_state: null,
   pendingBrowserUrl: null,
   pendingFocusAgentId: null,
   lastDashboardId: null,
@@ -19,12 +17,6 @@ const tempStateSlice = createSlice({
   name: 'tempState',
   initialState,
   reducers: {
-    setTempState(state, action: PayloadAction<string | null>) {
-      state.temp_state = action.payload;
-    },
-    resetTempState(state) {
-      state.temp_state = null;
-    },
     setPendingBrowserUrl(state, action: PayloadAction<string>) {
       state.pendingBrowserUrl = action.payload;
     },
@@ -43,9 +35,7 @@ const tempStateSlice = createSlice({
   },
 });
 
-export const { 
-  setTempState,
-  resetTempState,
+export const {
   setPendingBrowserUrl,
   clearPendingBrowserUrl,
   setLastDashboardId,

frontend/src/shared/ws/WebSocketManager.ts

@@ -947,20 +947,6 @@ export const dashboardWs = new WebSocketManager(`${WS_BASE}/ws/dashboard`, { ski
 // to a no-op replay. Safe.
 const _sessionLastSeq: Map<string, number> = new Map();
 
-export function getPersistedLastSeq(sessionId: string): number {
-  return _sessionLastSeq.get(sessionId) ?? 0;
-}
-
-export function setPersistedLastSeq(sessionId: string, seq: number): void {
-  if (seq > (_sessionLastSeq.get(sessionId) ?? 0)) {
-    _sessionLastSeq.set(sessionId, seq);
-  }
-}
-
-export function clearPersistedLastSeq(sessionId: string): void {
-  _sessionLastSeq.delete(sessionId);
-}
-
 export function createSessionWs(sessionId: string): WebSocketManager {
   return new WebSocketManager(`${WS_BASE}/ws/agents/${sessionId}`, { sessionId });
 }