diff --git a/app/src/admin/api/system.ts b/app/src/admin/api/system.ts
index 8aa0bd3..0087e39 100644
--- a/app/src/admin/api/system.ts
+++ b/app/src/admin/api/system.ts
@@ -14,6 +14,7 @@ export type GeneralState = {
   backend: string;
   docs: string;
   file: string;
+  pwa_manifest: string;
 };
 
 export type MailState = {
@@ -117,6 +118,7 @@ export const initialSystemState: SystemProps = {
     backend: "",
     docs: "",
     file: "",
+    pwa_manifest: "",
   },
   site: {
     relay_plan: false,
diff --git a/app/src/assets/globals.less b/app/src/assets/globals.less
index e001f1b..648204d 100644
--- a/app/src/assets/globals.less
+++ b/app/src/assets/globals.less
@@ -118,6 +118,10 @@
     --assistant-border-hover: hsla(218, 100%, 64%, .25);
     --assistant-shadow: hsla(218, 100%, 64%, .05);
   }
+
+  [type='text']:focus, input:where(:not([type])):focus, [type='email']:focus, [type='url']:focus, [type='password']:focus, [type='number']:focus, [type='date']:focus, [type='datetime-local']:focus, [type='month']:focus, [type='search']:focus, [type='tel']:focus, [type='time']:focus, [type='week']:focus, [multiple]:focus, textarea:focus, select:focus {
+    @apply border-border;
+  }
 }
 
 * {
diff --git a/app/src/assets/ui.less b/app/src/assets/ui.less
index 4e909ed..186bc91 100644
--- a/app/src/assets/ui.less
+++ b/app/src/assets/ui.less
@@ -371,3 +371,7 @@ input[type="number"] {
 .text-common {
   color: hsl(var(--text)) !important;
 }
+
+.error-border {
+  border-color: hsl(var(--destructive)) !important;
+}
diff --git a/app/src/components/EditorProvider.tsx b/app/src/components/EditorProvider.tsx
index 1da8c8c..50f329c 100644
--- a/app/src/components/EditorProvider.tsx
+++ b/app/src/components/EditorProvider.tsx
@@ -11,7 +11,7 @@ import { useTranslation } from "react-i18next";
 import "@/assets/common/editor.less";
 import { Textarea } from "./ui/textarea.tsx";
 import Markdown from "./Markdown.tsx";
-import React, { useEffect, useRef, useState } from "react";
+import React, { useEffect, useMemo, useRef, useState } from "react";
 import { Toggle } from "./ui/toggle.tsx";
 import { mobile } from "@/utils/device.ts";
 import { Button } from "./ui/button.tsx";
@@ -23,6 +23,8 @@ type RichEditorProps = {
   onChange: (value: string) => void;
   maxLength?: number;
 
+  formatter?: (value: string) => string;
+  isInvalid?: (value: string) => boolean;
   title?: string;
 
   open?: boolean;
@@ -38,7 +40,9 @@ function RichEditor({
   value,
   onChange,
   maxLength,
+  formatter,
   submittable,
+  isInvalid,
   onSubmit,
   setOpen,
   closeOnSubmit,
@@ -48,6 +52,13 @@ function RichEditor({
   const [openPreview, setOpenPreview] = useState(!mobile);
   const [openInput, setOpenInput] = useState(true);
 
+  const formattedValue = useMemo(() => {
+    return formatter ? formatter(value) : value;
+  }, [value, formatter]);
+  const invalid = useMemo(() => {
+    return isInvalid ? isInvalid(value) : false;
+  }, [value, isInvalid]);
+
   const handler = () => {
     if (!input.current) return;
     const target = input.current as HTMLElement;
@@ -133,7 +144,10 @@ function RichEditor({
             <Textarea
               placeholder={t("chat.placeholder-raw")}
               value={value}
-              className={`editor-input`}
+              className={cn(
+                `editor-input transition-all`,
+                invalid && `error-border`,
+              )}
               id={`editor`}
               maxLength={maxLength}
               onChange={(e) => onChange(e.target.value)}
@@ -141,7 +155,7 @@ function RichEditor({
             />
           )}
           {openPreview && (
-            <Markdown className={`editor-preview`} children={value} />
+            <Markdown className={`editor-preview`} children={formattedValue} />
           )}
         </div>
       </div>
@@ -198,3 +212,20 @@ function EditorProvider(props: RichEditorProps) {
 }
 
 export default EditorProvider;
+
+export function JSONEditorProvider({ ...props }: RichEditorProps) {
+  return (
+    <EditorProvider
+      {...props}
+      formatter={(value) => `\`\`\`json\n${value}\n\`\`\``}
+      isInvalid={(value) => {
+        try {
+          JSON.parse(value);
+          return false;
+        } catch (e) {
+          return true;
+        }
+      }}
+    />
+  );
+}
diff --git a/app/src/routes/admin/System.tsx b/app/src/routes/admin/System.tsx
index bf137c1..a1f0e7f 100644
--- a/app/src/routes/admin/System.tsx
+++ b/app/src/routes/admin/System.tsx
@@ -44,7 +44,7 @@ import {
 } from "@/components/ui/dialog.tsx";
 import { DialogTitle } from "@radix-ui/react-dialog";
 import Require from "@/components/Require.tsx";
-import { Loader2, Settings2 } from "lucide-react";
+import { Loader2, PencilLine, Settings2 } from "lucide-react";
 import { FlexibleTextarea } from "@/components/ui/textarea.tsx";
 import Tips from "@/components/Tips.tsx";
 import { cn } from "@/components/ui/lib/utils.ts";
@@ -54,6 +54,7 @@ import { allGroups } from "@/utils/groups.ts";
 import { useChannelModels } from "@/admin/hook.tsx";
 import { useSelector } from "react-redux";
 import { selectSupportModels } from "@/store/chat.ts";
+import { JSONEditorProvider } from "@/components/EditorProvider.tsx";
 
 type CompProps<T> = {
   data: T;
@@ -222,6 +223,20 @@ function General({ data, dispatch, onChange }: CompProps<GeneralState>) {
         />
       </ParagraphItem>
       <ParagraphDescription>{t("admin.system.fileTip")}</ParagraphDescription>
+      <ParagraphItem>
+        <Label>PWA Manifest</Label>
+        <JSONEditorProvider
+          value={data.pwa_manifest ?? ""}
+          onChange={(value) =>
+            dispatch({ type: "update:general.pwa_manifest", value })
+          }
+        >
+          <Button variant={`outline`}>
+            <PencilLine className={`h-4 w-4 mr-1`} />
+            {t("edit")}
+          </Button>
+        </JSONEditorProvider>
+      </ParagraphItem>
       <ParagraphFooter>
         <div className={`grow`} />
         <RootDialog />
diff --git a/channel/system.go b/channel/system.go
index f548b17..c389084 100644
--- a/channel/system.go
+++ b/channel/system.go
@@ -25,11 +25,12 @@ type ApiInfo struct {
 }
 
 type generalState struct {
-	Title   string `json:"title" mapstructure:"title"`
-	Logo    string `json:"logo" mapstructure:"logo"`
-	Backend string `json:"backend" mapstructure:"backend"`
-	File    string `json:"file" mapstructure:"file"`
-	Docs    string `json:"docs" mapstructure:"docs"`
+	Title       string `json:"title" mapstructure:"title"`
+	Logo        string `json:"logo" mapstructure:"logo"`
+	Backend     string `json:"backend" mapstructure:"backend"`
+	File        string `json:"file" mapstructure:"file"`
+	Docs        string `json:"docs" mapstructure:"docs"`
+	PWAManifest string `json:"pwa_manifest" mapstructure:"pwamanifest"`
 }
 
 type siteState struct {
@@ -98,6 +99,10 @@ func (c *SystemConfig) Load() {
 
 	globals.CacheAcceptedExpire = c.GetCacheAcceptedExpire()
 	globals.CacheAcceptedSize = c.GetCacheAcceptedSize()
+
+	if c.General.PWAManifest == "" {
+		c.General.PWAManifest = utils.ReadPWAManifest()
+	}
 }
 
 func (c *SystemConfig) SaveConfig() error {
@@ -133,6 +138,7 @@ func (c *SystemConfig) UpdateConfig(data *SystemConfig) error {
 	c.Common = data.Common
 
 	utils.ApplySeo(c.General.Title, c.General.Logo)
+	utils.ApplyPWAManifest(c.General.PWAManifest)
 
 	return c.SaveConfig()
 }
diff --git a/utils/config.go b/utils/config.go
index 27707c3..26af499 100644
--- a/utils/config.go
+++ b/utils/config.go
@@ -76,6 +76,51 @@ func ApplySeo(title, icon string) {
 	globals.Info("[service] seo optimization applied to index.cache.html")
 }
 
+func ApplyPWAManifest(content string) {
+	// pwa manifest rewrite (site.webmanifest -> site.cache.webmanifest)
+
+	if !viper.GetBool("serve_static") {
+		return
+	}
+
+	if len(content) == 0 {
+		// read from site.webmanifest if not provided
+
+		var err error
+		content, err = ReadFile("./app/dist/site.webmanifest")
+		if err != nil {
+			globals.Warn(fmt.Sprintf("[service] failed to read site.webmanifest: %s", err.Error()))
+			return
+		}
+	}
+
+	if err := WriteFile("./app/dist/site.cache.webmanifest", content, true); err != nil {
+		globals.Warn(fmt.Sprintf("[service] failed to write site.cache.webmanifest: %s", err.Error()))
+	}
+
+	globals.Info("[service] pwa manifest applied to site.cache.webmanifest")
+}
+
+func ReadPWAManifest() (content string) {
+	// read site.cache.webmanifest content or site.webmanifest if not found
+
+	if !viper.GetBool("serve_static") {
+		return
+	}
+
+	if text, err := ReadFile("./app/dist/site.cache.webmanifest"); err == nil && len(text) > 0 {
+		return text
+	}
+
+	if text, err := ReadFile("./app/dist/site.webmanifest"); err != nil {
+		globals.Warn(fmt.Sprintf("[service] failed to read site.webmanifest: %s", err.Error()))
+	} else {
+		content = text
+	}
+
+	return
+}
+
 func RegisterStaticRoute(engine *gin.Engine) {
 	// static files are in ~/app/dist
 
@@ -92,11 +137,16 @@ func RegisterStaticRoute(engine *gin.Engine) {
 	}
 
 	ApplySeo(viper.GetString("system.general.title"), viper.GetString("system.general.logo"))
+	ApplyPWAManifest(viper.GetString("system.general.pwamanifest"))
 
-	// serve / -> index.cache.html
 	engine.GET("/", func(c *gin.Context) {
 		c.File("./app/dist/index.cache.html")
 	})
+
+	engine.GET("/site.webmanifest", func(c *gin.Context) {
+		c.File("./app/dist/site.cache.webmanifest")
+	})
+
 	engine.Use(static.Serve("/", static.LocalFile("./app/dist", true)))
 	engine.NoRoute(func(c *gin.Context) {
 		c.File("./app/dist/index.cache.html")