diff --git a/apps/web/src/components/EditorPane.tsx b/apps/web/src/components/EditorPane.tsx
index fb406f5d..7212dea7 100644
--- a/apps/web/src/components/EditorPane.tsx
+++ b/apps/web/src/components/EditorPane.tsx
@@ -102,6 +102,15 @@ const EDITOR_AUTO_SAVE_DELAY_MS = 1200;
 const MOBILE_DRAFT_PERSIST_DELAY_MS = 800;
 const NOTE_SEARCH_HIGHLIGHT_PLUGIN_KEY = new PluginKey("edgeever-note-search-highlight");
 
+const IconTooltip = ({ label, children }: { label: string; children: ReactNode }) => (
+  <TooltipProvider delayDuration={0} skipDelayDuration={0}>
+    <Tooltip>
+      <TooltipTrigger asChild>{children}</TooltipTrigger>
+      <TooltipContent side="bottom">{label}</TooltipContent>
+    </Tooltip>
+  </TooltipProvider>
+);
+
 type NoteSearchMatch = {
   from: number;
   to: number;
@@ -2527,12 +2536,16 @@ const RichEditorPane = ({
                   </TooltipContent>
                 </Tooltip>
               </TooltipProvider>
-              <Button size="icon" variant="ghost" title={t("editor.previousMemo")} aria-label={t("editor.previousMemo")} onClick={onOpenPreviousMemo} disabled={!hasPreviousMemo}>
-                <ChevronLeft className="h-4 w-4" />
-              </Button>
-              <Button size="icon" variant="ghost" title={t("editor.nextMemo")} aria-label={t("editor.nextMemo")} onClick={onOpenNextMemo} disabled={!hasNextMemo}>
-                <ChevronRight className="h-4 w-4" />
-              </Button>
+              <IconTooltip label={t("editor.previousMemo")}>
+                <Button size="icon" variant="ghost" aria-label={t("editor.previousMemo")} onClick={onOpenPreviousMemo} disabled={!hasPreviousMemo}>
+                  <ChevronLeft className="h-4 w-4" />
+                </Button>
+              </IconTooltip>
+              <IconTooltip label={t("editor.nextMemo")}>
+                <Button size="icon" variant="ghost" aria-label={t("editor.nextMemo")} onClick={onOpenNextMemo} disabled={!hasNextMemo}>
+                  <ChevronRight className="h-4 w-4" />
+                </Button>
+              </IconTooltip>
             </div>
             <span className="hidden truncate text-xs text-slate-400 sm:inline">
               {t("editor.updatedAt", { time: updatedLabel })}
@@ -2616,9 +2629,11 @@ const RichEditorPane = ({
                 <Type className="h-4 w-4" />
               </Button>
             )}
-            <Button className="hidden h-8 w-8 text-slate-500 transition-colors hover:bg-slate-100 hover:text-slate-950 focus-visible:ring-2 focus-visible:ring-slate-300 sm:inline-flex" size="icon" variant="ghost" title={t("editor.searchCurrentMemo")} aria-label={t("editor.searchCurrentMemo")} onClick={() => openNoteSearch()}>
-              <Search className="h-5 w-5" strokeWidth={2.25} />
-            </Button>
+            <IconTooltip label={t("editor.searchCurrentMemo")}>
+              <Button className="hidden h-8 w-8 text-slate-500 transition-colors hover:bg-slate-100 hover:text-slate-950 focus-visible:ring-2 focus-visible:ring-slate-300 sm:inline-flex" size="icon" variant="ghost" aria-label={t("editor.searchCurrentMemo")} onClick={() => openNoteSearch()}>
+                <Search className="h-5 w-5" strokeWidth={2.25} />
+              </Button>
+            </IconTooltip>
             <TooltipProvider delayDuration={0} skipDelayDuration={0}>
               <Tooltip>
                 <TooltipTrigger asChild>
@@ -2651,27 +2666,32 @@ const RichEditorPane = ({
                 </TooltipContent>
               </Tooltip>
             </TooltipProvider>
-            <Button className="hidden h-8 w-8 text-slate-500 transition-colors hover:bg-slate-100 hover:text-slate-950 focus-visible:ring-2 focus-visible:ring-slate-300 sm:inline-flex" size="icon" variant="ghost" title={t("editor.versionHistory")} aria-label={t("editor.versionHistory")} onClick={() => setHistoryOpen(true)}>
-              <History className="h-5 w-5" strokeWidth={2.25} />
-            </Button>
+            <IconTooltip label={t("editor.versionHistory")}>
+              <Button className="hidden h-8 w-8 text-slate-500 transition-colors hover:bg-slate-100 hover:text-slate-950 focus-visible:ring-2 focus-visible:ring-slate-300 sm:inline-flex" size="icon" variant="ghost" aria-label={t("editor.versionHistory")} onClick={() => setHistoryOpen(true)}>
+                <History className="h-5 w-5" strokeWidth={2.25} />
+              </Button>
+            </IconTooltip>
             <GitHubRepositoryLink className="hidden h-8 w-8 justify-center rounded-md text-slate-500 transition-colors hover:bg-slate-100 hover:text-slate-950 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-emerald-500/70 lg:inline-flex" iconClassName="h-5 w-5" />
-            <Button className="relative hidden h-8 w-8 text-slate-500 transition-colors hover:bg-slate-100 hover:text-slate-950 focus-visible:ring-2 focus-visible:ring-emerald-500/70 sm:inline-flex" size="icon" variant="ghost" title={t("systemInfo.title")} aria-label={t("systemInfo.title")} onClick={() => setSystemInfoOpen(true)}>
-              <Info className="h-5 w-5" strokeWidth={2.25} />
-              {updateAvailable ? <span className="absolute right-1 top-1 h-1.5 w-1.5 rounded-full bg-emerald-500 ring-2 ring-white" aria-label={t("systemInfo.updateAvailableTitle")} /> : null}
-            </Button>
+            <IconTooltip label={t("systemInfo.title")}>
+              <Button className="relative hidden h-8 w-8 text-slate-500 transition-colors hover:bg-slate-100 hover:text-slate-950 focus-visible:ring-2 focus-visible:ring-emerald-500/70 sm:inline-flex" size="icon" variant="ghost" aria-label={t("systemInfo.title")} onClick={() => setSystemInfoOpen(true)}>
+                <Info className="h-5 w-5" strokeWidth={2.25} />
+                {updateAvailable ? <span className="absolute right-1 top-1 h-1.5 w-1.5 rounded-full bg-emerald-500 ring-2 ring-white" /> : null}
+              </Button>
+            </IconTooltip>
             <ThemeToggle />
             {!readOnly && (
-              <Button
-                className="hidden sm:inline-flex"
-                size="icon"
-                variant="solid"
-                title={t("editor.save")}
-                aria-label={t("editor.save")}
-                onClick={() => saveMutation.mutate()}
-                disabled={!editor || saveMutation.isPending || !hasUnsavedChanges}
-              >
-                <Save className="h-4 w-4" />
-              </Button>
+              <IconTooltip label={t("editor.save")}>
+                <Button
+                  className="hidden sm:inline-flex"
+                  size="icon"
+                  variant="solid"
+                  aria-label={t("editor.save")}
+                  onClick={() => saveMutation.mutate()}
+                  disabled={!editor || saveMutation.isPending || !hasUnsavedChanges}
+                >
+                  <Save className="h-4 w-4" />
+                </Button>
+              </IconTooltip>
             )}
             <DropdownMenu>
               <DropdownMenuTrigger asChild>
diff --git a/apps/web/src/components/GitHubRepositoryLink.tsx b/apps/web/src/components/GitHubRepositoryLink.tsx
index 6fdad7ea..1fba98e7 100644
--- a/apps/web/src/components/GitHubRepositoryLink.tsx
+++ b/apps/web/src/components/GitHubRepositoryLink.tsx
@@ -1,5 +1,6 @@
 import { type ReactNode } from "react";
 import { useTranslation } from "react-i18next";
+import { Tooltip, TooltipContent, TooltipProvider, TooltipTrigger } from "@/components/ui/tooltip";
 import { cn } from "@/lib/utils";
 
 const GITHUB_REPOSITORY_URL = "https://github.com/tianma-if/edgeever";
@@ -18,27 +19,25 @@ export const GitHubRepositoryLink = ({
   children,
   className,
   iconClassName,
-  title,
 }: {
   children?: ReactNode;
   className?: string;
   iconClassName?: string;
-  title?: string;
 }) => {
   const { t } = useTranslation();
-  const resolvedTitle = title ?? t("common.githubRepository");
+  const resolvedTitle = t("common.githubRepository");
 
   return (
-    <a
-      className={cn("inline-flex items-center gap-2", className)}
-      href={GITHUB_REPOSITORY_URL}
-      target="_blank"
-      rel="noopener noreferrer"
-      title={resolvedTitle}
-      aria-label={children ? undefined : resolvedTitle}
-    >
-      <GitHubMark className={cn("h-4 w-4 shrink-0", iconClassName)} />
-      {children}
-    </a>
+    <TooltipProvider delayDuration={0} skipDelayDuration={0}>
+      <Tooltip>
+        <TooltipTrigger asChild>
+          <a className={cn("inline-flex items-center gap-2", className)} href={GITHUB_REPOSITORY_URL} target="_blank" rel="noopener noreferrer" title="" aria-label={children ? undefined : resolvedTitle}>
+            <GitHubMark className={cn("h-4 w-4 shrink-0", iconClassName)} />
+            {children}
+          </a>
+        </TooltipTrigger>
+        <TooltipContent side="bottom">{resolvedTitle}</TooltipContent>
+      </Tooltip>
+    </TooltipProvider>
   );
 };
diff --git a/apps/web/src/components/ThemeToggle.tsx b/apps/web/src/components/ThemeToggle.tsx
index 55c02f6a..4956b057 100644
--- a/apps/web/src/components/ThemeToggle.tsx
+++ b/apps/web/src/components/ThemeToggle.tsx
@@ -2,6 +2,7 @@ import { MoonStar, SunMedium } from "lucide-react";
 import { useTranslation } from "react-i18next";
 import { Button } from "@/components/ui/button";
 import { cn } from "@/lib/utils";
+import { Tooltip, TooltipContent, TooltipProvider, TooltipTrigger } from "@/components/ui/tooltip";
 import { useTheme } from "./ThemeProvider";
 
 export const ThemeToggle = ({ className, showLabel = false }: { className?: string; showLabel?: boolean }) => {
@@ -11,20 +12,26 @@ export const ThemeToggle = ({ className, showLabel = false }: { className?: stri
   const label = nextTheme === "dark" ? t("settings.themeToggleToDark") : t("settings.themeToggleToLight");
 
   return (
-    <Button
-      className={cn(
-        "hidden h-8 w-8 text-slate-600 transition-colors hover:bg-slate-100 hover:text-slate-950 focus-visible:ring-2 focus-visible:ring-slate-300 lg:inline-flex",
-        showLabel && "h-9 w-auto gap-2 px-3 lg:h-8 lg:w-8 lg:gap-0 lg:px-0",
-        className
-      )}
-      size={showLabel ? "sm" : "icon"}
-      variant="ghost"
-      title={label}
-      aria-label={label}
-      onClick={() => setPreference(nextTheme)}
-    >
-      {resolvedTheme === "dark" ? <SunMedium className="h-5 w-5" strokeWidth={2.25} /> : <MoonStar className="h-5 w-5" strokeWidth={2.25} />}
-      {showLabel && <span className="inline text-xs font-medium lg:hidden">{label}</span>}
-    </Button>
+    <TooltipProvider delayDuration={0} skipDelayDuration={0}>
+      <Tooltip>
+        <TooltipTrigger asChild>
+          <Button
+            className={cn(
+              "hidden h-8 w-8 text-slate-600 transition-colors hover:bg-slate-100 hover:text-slate-950 focus-visible:ring-2 focus-visible:ring-slate-300 lg:inline-flex",
+              showLabel && "h-9 w-auto gap-2 px-3 lg:h-8 lg:w-8 lg:gap-0 lg:px-0",
+              className
+            )}
+            size={showLabel ? "sm" : "icon"}
+            variant="ghost"
+            aria-label={label}
+            onClick={() => setPreference(nextTheme)}
+          >
+            {resolvedTheme === "dark" ? <SunMedium className="h-5 w-5" strokeWidth={2.25} /> : <MoonStar className="h-5 w-5" strokeWidth={2.25} />}
+            {showLabel && <span className="inline text-xs font-medium lg:hidden">{label}</span>}
+          </Button>
+        </TooltipTrigger>
+        <TooltipContent side="bottom">{label}</TooltipContent>
+      </Tooltip>
+    </TooltipProvider>
   );
 };
diff --git a/packages/shared/src/i18n/en-US.ts b/packages/shared/src/i18n/en-US.ts
index a2a58c21..9a2cb6bd 100644
--- a/packages/shared/src/i18n/en-US.ts
+++ b/packages/shared/src/i18n/en-US.ts
@@ -13,7 +13,7 @@ export const enUS = {
     processing: "Processing",
     saving: "Saving",
     copied: "Copied",
-    githubRepository: "GitHub repository",
+    githubRepository: "Open source",
   },
   dialogs: {
     memoDelete: {
diff --git a/packages/shared/src/i18n/zh-CN.ts b/packages/shared/src/i18n/zh-CN.ts
index 9775a517..4d23127a 100644
--- a/packages/shared/src/i18n/zh-CN.ts
+++ b/packages/shared/src/i18n/zh-CN.ts
@@ -13,7 +13,7 @@ export const zhCN = {
     processing: "处理中",
     saving: "保存中",
     copied: "已复制",
-    githubRepository: "GitHub 仓库",
+    githubRepository: "开源",
   },
   dialogs: {
     memoDelete: {