feat: implement palette toggle component and update layout for dynamic theme support

web/components/dashboard-page.tsx

@@ -29,7 +29,7 @@ export function DashboardToolbar({
   return (
     <div
       className={cn(
-        "flex flex-col gap-3 rounded-lg border bg-card p-3 lg:flex-row lg:items-center lg:justify-between",
+        "flex flex-col gap-3 rounded-lg border border-border/70 bg-card/95 p-3 shadow-[0_1px_2px_rgba(15,23,42,0.04)] lg:flex-row lg:items-center lg:justify-between dark:shadow-none",
         className
       )}
     >
@@ -54,7 +54,7 @@ export function DashboardTableShell({
 }) {
   return (
     <div className={cn("space-y-4", className)}>
-      <div className="overflow-hidden rounded-lg border bg-card text-card-foreground">
+      <div className="overflow-hidden rounded-lg border border-border/70 bg-card text-card-foreground shadow-[0_1px_2px_rgba(15,23,42,0.035)] dark:shadow-none">
         {children}
       </div>
       {pagination ? <div>{pagination}</div> : null}

web/components/palette-toggle.tsx

@@ -0,0 +1,96 @@
+"use client"
+
+import { useEffect, useState } from "react"
+import { DropletsIcon, PaletteIcon } from "lucide-react"
+
+import { Button } from "@/components/ui/button"
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuRadioGroup,
+  DropdownMenuRadioItem,
+  DropdownMenuTrigger,
+} from "@/components/ui/dropdown-menu"
+
+type PaletteMode = "blue" | "green" | "gray"
+
+const PALETTE_STORAGE_KEY = "dashboard_palette"
+const DEFAULT_PALETTE: PaletteMode = "green"
+
+const paletteOptions: Array<{
+  value: PaletteMode
+  label: string
+  swatch: string
+}> = [
+  {
+    value: "green",
+    label: "温润服务绿",
+    swatch: "bg-teal-700",
+  },
+  {
+    value: "gray",
+    label: "中性精密灰",
+    swatch: "bg-slate-500",
+  },
+  {
+    value: "blue",
+    label: "清透科技蓝",
+    swatch: "bg-blue-600",
+  },
+]
+
+function readPalette(): PaletteMode {
+  if (typeof window === "undefined") {
+    return DEFAULT_PALETTE
+  }
+
+  const stored = window.localStorage.getItem(PALETTE_STORAGE_KEY)
+  return stored === "blue" || stored === "green" || stored === "gray"
+    ? stored
+    : DEFAULT_PALETTE
+}
+
+function applyPalette(value: PaletteMode) {
+  document.documentElement.dataset.palette = value
+  window.localStorage.setItem(PALETTE_STORAGE_KEY, value)
+}
+
+export function PaletteToggle() {
+  const [palette, setPalette] = useState<PaletteMode>(DEFAULT_PALETTE)
+
+  useEffect(() => {
+    const storedPalette = readPalette()
+    setPalette(storedPalette)
+    applyPalette(storedPalette)
+  }, [])
+
+  function handleChange(value: string) {
+    const nextPalette: PaletteMode =
+      value === "blue" || value === "gray" ? value : "green"
+    setPalette(nextPalette)
+    applyPalette(nextPalette)
+  }
+
+  const ActiveIcon = palette === "green" ? DropletsIcon : PaletteIcon
+
+  return (
+    <DropdownMenu>
+      <DropdownMenuTrigger
+        render={<Button variant="outline" size="sm" />}
+        aria-label="切换主题色"
+      >
+        <ActiveIcon />
+      </DropdownMenuTrigger>
+      <DropdownMenuContent align="end" className="w-52 min-w-52">
+        <DropdownMenuRadioGroup value={palette} onValueChange={handleChange}>
+          {paletteOptions.map((option) => (
+            <DropdownMenuRadioItem key={option.value} value={option.value}>
+              <span className={`size-2.5 rounded-full ${option.swatch}`} />
+              <span className="flex-1">{option.label}</span>
+            </DropdownMenuRadioItem>
+          ))}
+        </DropdownMenuRadioGroup>
+      </DropdownMenuContent>
+    </DropdownMenu>
+  )
+}

web/components/site-header.tsx

@@ -6,6 +6,7 @@ import { usePathname } from "next/navigation"
 import { RealtimeConnectionStatus } from "@/components/realtime-connection-status"
 import { getPageTitle } from "@/lib/navigation"
 import { useAgentConversationsStore } from "@/lib/stores/agent-conversations"
+import { PaletteToggle } from "@/components/palette-toggle"
 import { ThemeToggle } from "@/components/theme-toggle"
 import {
   Breadcrumb,
@@ -50,7 +51,7 @@ export function SiteHeader() {
   }, [isMobile, open])
 
   return (
-    <header className="flex h-(--header-height) shrink-0 items-center gap-2 border-b transition-[width,height] ease-linear group-has-data-[collapsible=icon]/sidebar-wrapper:h-(--header-height)">
+    <header className="flex h-(--header-height) shrink-0 items-center gap-2 border-b border-border/70 bg-background/82 backdrop-blur supports-[backdrop-filter]:bg-background/72 transition-[width,height] ease-linear group-has-data-[collapsible=icon]/sidebar-wrapper:h-(--header-height)">
       <div className="flex w-full items-center justify-between gap-3 px-4 lg:px-6">
         <div className="flex min-w-0 items-center gap-2">
           <SidebarTrigger className="-ml-1" />
@@ -73,7 +74,8 @@ export function SiteHeader() {
             </Breadcrumb>
           </div>
         </div>
-        <div className="flex items-center justify-end gap-3">
+        <div className="flex items-center justify-end gap-2">
+          <PaletteToggle />
           <ThemeToggle />
         </div>
       </div>