feat(ui): add session reload action

Let users refresh a session transcript from the sidebar without reopening it. Reuse the existing forced message loading path so the reload behavior stays aligned with normal session hydration.

packages/ui/src/components/session-list.tsx

@@ -2,7 +2,7 @@ import { Component, For, Show, createSignal, createMemo, createEffect, JSX, onCl
 import type { SessionStatus } from "../types/session"
 import type { SessionThread } from "../stores/session-state"
 import { getSessionStatus } from "../stores/session-status"
-import { Bot, User, Copy, Trash2, Pencil, ShieldAlert, ChevronDown, Search, Square, CheckSquare, MinusSquare, Split } from "lucide-solid"
+import { Bot, User, Copy, Trash2, Pencil, ShieldAlert, ChevronDown, Search, Square, CheckSquare, MinusSquare, Split, RotateCw } from "lucide-solid"
 import KeyboardHint from "./keyboard-hint"
 import SessionRenameDialog from "./session-rename-dialog"
 import { keyboardRegistry } from "../lib/keyboard-registry"
@@ -14,6 +14,7 @@ import {
   ensureSessionParentExpanded,
   getVisibleSessionIds,
   isSessionParentExpanded,
+  loadMessages,
   loading,
   renameSession,
   sessions as sessionStateSessions,
@@ -53,6 +54,7 @@ const SessionList: Component<SessionListProps> = (props) => {
   const normalizedQuery = createMemo(() => (props.enableFilterBar ? filterQuery().trim().toLowerCase() : ""))
 
   const [selectedSessionIds, setSelectedSessionIds] = createSignal<Set<string>>(new Set())
+  const [reloadingSessionIds, setReloadingSessionIds] = createSignal<Set<string>>(new Set())
 
   const normalizeSessionLabel = (sessionId: string) => {
     const session = sessionStateSessions().get(props.instanceId)?.get(sessionId)
@@ -213,6 +215,32 @@ const SessionList: Component<SessionListProps> = (props) => {
     setRenameTarget({ id: sessionId, title: session.title ?? "", label })
   }
 
+  const isSessionReloading = (sessionId: string) => reloadingSessionIds().has(sessionId)
+
+  const handleReloadSession = async (event: MouseEvent, sessionId: string) => {
+    event.stopPropagation()
+    if (isSessionReloading(sessionId)) return
+
+    setReloadingSessionIds((prev) => {
+      const next = new Set(prev)
+      next.add(sessionId)
+      return next
+    })
+
+    try {
+      await loadMessages(props.instanceId, sessionId, true)
+    } catch (error) {
+      log.error(`Failed to reload session ${sessionId}:`, error)
+      showToastNotification({ message: t("sessionList.reload.error"), variant: "error" })
+    } finally {
+      setReloadingSessionIds((prev) => {
+        const next = new Set(prev)
+        next.delete(sessionId)
+        return next
+      })
+    }
+  }
+
   const closeRenameDialog = () => {
     setRenameTarget(null)
   }
@@ -493,6 +521,21 @@ const SessionList: Component<SessionListProps> = (props) => {
               >
                 <Copy class="w-3 h-3" />
               </span>
+              <span
+                class={`session-item-close opacity-80 hover:opacity-100 ${isActive() ? "hover:bg-white/20" : "hover:bg-surface-hover"}`}
+                onClick={(event) => handleReloadSession(event, rowProps.sessionId)}
+                role="button"
+                tabIndex={0}
+                aria-label={t("sessionList.actions.reload.ariaLabel")}
+                title={t("sessionList.actions.reload.title")}
+              >
+                <Show
+                  when={!isSessionReloading(rowProps.sessionId)}
+                  fallback={<RotateCw class="w-3 h-3 animate-spin" />}
+                >
+                  <RotateCw class="w-3 h-3" />
+                </Show>
+              </span>
               <span
                 class={`session-item-close opacity-80 hover:opacity-100 ${isActive() ? "hover:bg-white/20" : "hover:bg-surface-hover"}`}
                 onClick={(event) => {