diff --git a/.github/workflows/vercel-auto-deploy.yml b/.github/workflows/vercel-auto-deploy.yml
new file mode 100644
index 00000000..7d0e6cee
--- /dev/null
+++ b/.github/workflows/vercel-auto-deploy.yml
@@ -0,0 +1,22 @@
+name: Vercel Auto Deploy
+
+on:
+  push:
+    branches:
+      - dev  # 自动预览部署的分支
+      # 如需对 master/main 做生产部署，可在后续扩展
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Deploy to Vercel (preview)
+        uses: amondnet/vercel-action@v20
+        with:
+          vercel-token: ${{ secrets.VERCEL_TOKEN }}          # Vercel 访问令牌
+          vercel-org-id: ${{ secrets.VERCEL_ORG_ID }}        # Vercel 组织 ID
+          vercel-project-id: ${{ secrets.VERCEL_PROJECT_ID }}# Vercel 项目 ID
+          vercel-args: '--previews'                         # dev 分支走预览部署
diff --git a/web/src/components/research/SearchBox.tsx b/web/src/components/research/SearchBox.tsx
index cefb24c9..0b973072 100644
--- a/web/src/components/research/SearchBox.tsx
+++ b/web/src/components/research/SearchBox.tsx
@@ -4,6 +4,7 @@ import { KeyboardEvent, useRef, useState } from "react"
 import { Brain, CalendarRange, Check, Loader2, Search } from "lucide-react"
 
 import { cn } from "@/lib/utils"
+import { showTrackMemoryButton } from "@/config/features"
 import { Button } from "@/components/ui/button"
 import { Textarea } from "@/components/ui/textarea"
 import { Popover, PopoverContent, PopoverAnchor } from "@/components/ui/popover"
@@ -247,16 +248,18 @@ export function SearchBox({
 
           {/* Right side - Memory, Track selector and Search button */}
           <div className="flex items-center gap-1.5 sm:gap-2">
-            <Button
-              variant="ghost"
-              size="icon"
-              className="h-8 w-8"
-              onClick={onOpenMemory}
-              disabled={disabled || isSearching}
-              title="Track Memory"
-            >
-              <Brain className="h-4 w-4" />
-            </Button>
+            {onOpenMemory && showTrackMemoryButton() && (
+              <Button
+                variant="ghost"
+                size="icon"
+                className="h-8 w-8"
+                onClick={onOpenMemory}
+                disabled={disabled || isSearching}
+                title="Track Memory"
+              >
+                <Brain className="h-4 w-4" />
+              </Button>
+            )}
 
             <TrackSelector
               tracks={tracks}
diff --git a/web/src/components/research/TrackPills.tsx b/web/src/components/research/TrackPills.tsx
index 70351d17..5bc68343 100644
--- a/web/src/components/research/TrackPills.tsx
+++ b/web/src/components/research/TrackPills.tsx
@@ -64,7 +64,9 @@ export function TrackPills({
               ? "bg-primary text-primary-foreground shadow-sm"
               : "bg-background hover:bg-accent"
           )}
-          onClick={() => onSelectTrack(track.id)}
+          onClick={() => {
+            if (track.id !== activeTrackId) onSelectTrack(track.id)
+          }}
           disabled={disabled}
         >
           {(() => {
diff --git a/web/src/components/research/TrackSelector.tsx b/web/src/components/research/TrackSelector.tsx
index 7ac90d75..8dc20efc 100644
--- a/web/src/components/research/TrackSelector.tsx
+++ b/web/src/components/research/TrackSelector.tsx
@@ -60,7 +60,11 @@ export function TrackSelector({
           tracks.map((track) => (
             <DropdownMenuItem
               key={track.id}
-              onClick={() => onSelectTrack(track.id)}
+              onClick={() => {
+                if (!activeTrack || track.id !== activeTrack.id) {
+                  onSelectTrack(track.id)
+                }
+              }}
               className="flex items-center justify-between"
             >
               <span className="truncate">{track.name}</span>
diff --git a/web/src/config/features.ts b/web/src/config/features.ts
index 739cfdb9..baa2a229 100644
--- a/web/src/config/features.ts
+++ b/web/src/config/features.ts
@@ -18,3 +18,20 @@ export function showDiscoveryLink(): boolean {
   return parseBool(process.env.NEXT_PUBLIC_SHOW_DISCOVERY)
 }
 
+
+
+// Whether to show the Track Memory button (brain icon) in Research search box.
+// Default: false. Can be overridden by:
+// - runtime localStorage key:  paperbot.showTrackMemory  ("1"/"true")
+// - build-time env: NEXT_PUBLIC_SHOW_TRACK_MEMORY ("1"/"true")
+export function showTrackMemoryButton(): boolean {
+  if (typeof window !== "undefined") {
+    const v = window.localStorage.getItem("paperbot.showTrackMemory")
+    if (v != null) return parseBool(v)
+  }
+  // Fallback: allow sharing the same env flag as discovery if desired
+  return (
+    parseBool(process.env.NEXT_PUBLIC_SHOW_TRACK_MEMORY) ||
+    parseBool(process.env.NEXT_PUBLIC_SHOW_DISCOVERY)
+  )
+}