diff --git a/packages/backend/src/routes/documents.ts b/packages/backend/src/routes/documents.ts
index 6259460..1a20933 100644
--- a/packages/backend/src/routes/documents.ts
+++ b/packages/backend/src/routes/documents.ts
@@ -7,11 +7,10 @@ import {
   addDocument,
   deleteDocument,
   getDocument,
-  overwriteDocument,
 } from '../services/sessionStore.js';
 import {
   buildEditorConfig,
-  convertToOriginalFormat,
+  persistDocumentFromUrl,
 } from '../services/onlyOffice.js';
 import {
   createBlankDocument,
@@ -187,33 +186,7 @@ documentsRouter.post('/:docId/callback', async (req, res) => {
     }
 
     try {
-      const downloaded = await fetch(fileUrl);
-      if (!downloaded.ok) {
-        console.error('[callback] download failed', downloaded.status);
-        res.json({ error: 1 });
-        return;
-      }
-
-      let buffer: Buffer = Buffer.from(await downloaded.arrayBuffer());
-      const returnedType = (filetype ?? doc.fileType).toLowerCase();
-
-      if (returnedType !== doc.fileType) {
-        const converted = await convertToOriginalFormat(
-          fileUrl,
-          returnedType,
-          doc.fileType,
-        );
-        if (!converted) {
-          console.error(
-            `[callback] refused save: got ${returnedType}, need ${doc.fileType}`,
-          );
-          res.json({ error: 1 });
-          return;
-        }
-        buffer = Buffer.from(converted);
-      }
-
-      await overwriteDocument(doc, buffer, doc.fileType);
+      await persistDocumentFromUrl(doc, fileUrl, filetype);
     } catch (err) {
       console.error('[callback] save error', err);
       res.json({ error: 1 });
diff --git a/packages/backend/src/services/onlyOffice.ts b/packages/backend/src/services/onlyOffice.ts
index 43a55da..976e166 100644
--- a/packages/backend/src/services/onlyOffice.ts
+++ b/packages/backend/src/services/onlyOffice.ts
@@ -1,5 +1,6 @@
 import { config } from '../config.js';
 import type { SessionDoc } from '../types/session.js';
+import { overwriteDocument } from './sessionStore.js';
 import { signOnlyOfficePayload } from '../utils/jwt.js';
 
 export function buildEditorConfig(doc: SessionDoc, userId: string) {
@@ -49,6 +50,59 @@ export function buildEditorConfig(doc: SessionDoc, userId: string) {
   };
 }
 
+/** Prefer the internal Document Server base when the backend fetches the file. */
+export function toInternalOnlyOfficeUrl(raw: string): string {
+  try {
+    const target = new URL(raw);
+    const publicBase = new URL(config.onlyOfficeUrl);
+    const internalBase = new URL(config.onlyOfficeInternalUrl);
+    if (
+      target.host === publicBase.host ||
+      target.host === internalBase.host
+    ) {
+      target.protocol = internalBase.protocol;
+      target.host = internalBase.host;
+    }
+    return target.toString();
+  } catch {
+    return raw;
+  }
+}
+
+/**
+ * Download an OnlyOffice-produced file URL and overwrite the session document
+ * (converting back to the original extension when needed).
+ */
+export async function persistDocumentFromUrl(
+  doc: SessionDoc,
+  fileUrl: string,
+  filetype?: string,
+): Promise<Buffer> {
+  const fetchUrl = toInternalOnlyOfficeUrl(fileUrl);
+  const downloaded = await fetch(fetchUrl);
+  if (!downloaded.ok) {
+    throw new Error(`download_failed_${downloaded.status}`);
+  }
+
+  let buffer: Buffer = Buffer.from(await downloaded.arrayBuffer());
+  const returnedType = (filetype ?? doc.fileType).toLowerCase();
+
+  if (returnedType !== doc.fileType) {
+    const converted = await convertToOriginalFormat(
+      fetchUrl,
+      returnedType,
+      doc.fileType,
+    );
+    if (!converted) {
+      throw new Error(`convert_failed:${returnedType}->${doc.fileType}`);
+    }
+    buffer = Buffer.from(converted);
+  }
+
+  await overwriteDocument(doc, buffer, doc.fileType);
+  return buffer;
+}
+
 export async function convertToOriginalFormat(
   sourceUrl: string,
   fromExt: string,
diff --git a/packages/frontend/src/App.vue b/packages/frontend/src/App.vue
index fc8b2dd..3fb73a2 100644
--- a/packages/frontend/src/App.vue
+++ b/packages/frontend/src/App.vue
@@ -1,7 +1,10 @@
 <script setup lang="ts">
 import { computed } from 'vue';
 import { useRoute } from 'vue-router';
-import { bindSessionPageHideOnce } from '@/composables/useSessionLifecycle';
+import {
+  bindSessionPageHideOnce,
+  hwpOpenToken,
+} from '@/composables/useSessionLifecycle';
 
 bindSessionPageHideOnce();
 
@@ -12,8 +15,9 @@ const viewKey = computed(() => {
   if (route.name === 'onlyoffice-editor') {
     return `onlyoffice-${route.params.docId}`;
   }
+  // Token changes on every staged HWP open so the view remounts with the new file.
   if (route.name === 'rhwp-editor') {
-    return 'rhwp-editor';
+    return `rhwp-${hwpOpenToken()}`;
   }
   if (
     route.name === 'excalidraw-editor' ||
@@ -35,7 +39,6 @@ const viewKey = computed(() => {
     <KeepAlive
       :include="[
         'OnlyOfficeEditorView',
-        'RhwpEditorView',
         'ExcalidrawEditorView',
         'MermaidEditorView',
         'DrawioEditorView',
diff --git a/packages/frontend/src/api/client.ts b/packages/frontend/src/api/client.ts
index 1ecdcc8..2bfa2de 100644
--- a/packages/frontend/src/api/client.ts
+++ b/packages/frontend/src/api/client.ts
@@ -35,12 +35,20 @@ export async function createSession(): Promise<{
 }
 
 export async function heartbeat(): Promise<void> {
-  await fetch('/api/sessions/heartbeat', {
+  const res = await fetch('/api/sessions/heartbeat', {
     method: 'POST',
     credentials: 'include',
   });
+  if (!res.ok) {
+    throw new ApiError(
+      res.status,
+      'session_required',
+      '세션이 만료되었거나 없습니다.',
+    );
+  }
 }
 
+
 export async function endSession(): Promise<void> {
   await fetch('/api/sessions', {
     method: 'DELETE',
@@ -116,7 +124,3 @@ export async function fetchEditorConfig(
     }),
   );
 }
-
-export function downloadDocumentUrl(docId: string): string {
-  return `/api/documents/${docId}/download`;
-}
diff --git a/packages/frontend/src/assets/icons/hwp.png b/packages/frontend/src/assets/icons/hwp.png
new file mode 100644
index 0000000..7bf8075
Binary files /dev/null and b/packages/frontend/src/assets/icons/hwp.png differ
diff --git a/packages/frontend/src/components/DownloadGuideModal.vue b/packages/frontend/src/components/DownloadGuideModal.vue
new file mode 100644
index 0000000..c23c7e3
--- /dev/null
+++ b/packages/frontend/src/components/DownloadGuideModal.vue
@@ -0,0 +1,156 @@
+<script setup lang="ts">
+import { onMounted, onUnmounted, watch } from 'vue';
+
+const props = withDefaults(
+  defineProps<{
+    open?: boolean;
+    title?: string;
+    lead?: string;
+    steps?: string[];
+    pathHint?: string;
+  }>(),
+  {
+    open: false,
+    title: '다운로드 방법',
+    lead: '',
+    steps: () => [],
+    pathHint: '',
+  },
+);
+
+const emit = defineEmits<{
+  close: [];
+}>();
+
+function onKeydown(e: KeyboardEvent) {
+  if (!props.open) return;
+  if (e.key === 'Escape') emit('close');
+}
+
+onMounted(() => {
+  window.addEventListener('keydown', onKeydown);
+});
+
+onUnmounted(() => {
+  window.removeEventListener('keydown', onKeydown);
+  if (typeof document !== 'undefined') {
+    document.body.style.overflow = '';
+  }
+});
+
+watch(
+  () => props.open,
+  (open) => {
+    if (typeof document === 'undefined') return;
+    document.body.style.overflow = open ? 'hidden' : '';
+  },
+);
+</script>
+
+<template>
+  <Teleport to="body">
+    <div
+      v-if="open"
+      class="guide"
+      role="dialog"
+      aria-modal="true"
+      aria-labelledby="download-guide-title"
+      @click.self="emit('close')"
+    >
+      <div class="guide__panel">
+        <h2 id="download-guide-title" class="guide__title">{{ title }}</h2>
+        <p v-if="lead" class="guide__lead">{{ lead }}</p>
+        <ol v-if="steps.length" class="guide__steps">
+          <li v-for="(step, i) in steps" :key="i">{{ step }}</li>
+        </ol>
+        <p v-if="pathHint" class="guide__path" aria-hidden="true">
+          {{ pathHint }}
+        </p>
+        <div class="guide__actions">
+          <button type="button" class="guide__btn" @click="emit('close')">
+            확인
+          </button>
+        </div>
+      </div>
+    </div>
+  </Teleport>
+</template>
+
+<style scoped>
+.guide {
+  position: fixed;
+  inset: 0;
+  z-index: 40;
+  display: grid;
+  place-items: center;
+  padding: 1.25rem;
+  background: rgb(0 0 0 / 45%);
+}
+
+.guide__panel {
+  width: min(420px, 100%);
+  padding: 1.25rem 1.35rem 1.1rem;
+  border-radius: 10px;
+  border: 1px solid var(--border);
+  background: var(--surface);
+  color: var(--ink);
+  box-shadow: 0 12px 40px rgb(0 0 0 / 18%);
+}
+
+.guide__title {
+  margin: 0 0 0.5rem;
+  font-size: 1.1rem;
+  font-weight: 650;
+}
+
+.guide__lead {
+  margin: 0 0 0.85rem;
+  font-size: 0.9rem;
+  color: var(--ink-soft);
+  line-height: 1.45;
+}
+
+.guide__steps {
+  margin: 0 0 0.85rem;
+  padding-left: 1.2rem;
+  font-size: 0.9rem;
+  line-height: 1.55;
+  color: var(--ink);
+}
+
+.guide__steps li + li {
+  margin-top: 0.35rem;
+}
+
+.guide__path {
+  margin: 0 0 1.1rem;
+  padding: 0.55rem 0.7rem;
+  border-radius: 6px;
+  background: var(--accent-soft);
+  color: var(--accent);
+  font-size: 0.82rem;
+  font-weight: 600;
+  letter-spacing: -0.01em;
+}
+
+.guide__actions {
+  display: flex;
+  justify-content: flex-end;
+}
+
+.guide__btn {
+  font: inherit;
+  font-size: 0.88rem;
+  font-weight: 600;
+  padding: 0.45rem 1rem;
+  border-radius: 6px;
+  border: none;
+  background: var(--accent);
+  color: #fff;
+  cursor: pointer;
+}
+
+.guide__btn:hover {
+  filter: brightness(1.05);
+}
+</style>
diff --git a/packages/frontend/src/components/EditorToolbar.vue b/packages/frontend/src/components/EditorToolbar.vue
index 5abd9a1..ad0ca0f 100644
--- a/packages/frontend/src/components/EditorToolbar.vue
+++ b/packages/frontend/src/components/EditorToolbar.vue
@@ -9,7 +9,7 @@ withDefaults(
     busy?: boolean;
   }>(),
   {
-    saveLabel: '저장',
+    saveLabel: '다운로드',
     showSave: true,
     showExportActions: false,
     showFilename: true,
diff --git a/packages/frontend/src/components/FileTypeIcon.vue b/packages/frontend/src/components/FileTypeIcon.vue
index 57555ac..ac18dd0 100644
--- a/packages/frontend/src/components/FileTypeIcon.vue
+++ b/packages/frontend/src/components/FileTypeIcon.vue
@@ -1,7 +1,9 @@
 <script setup lang="ts">
 import { computed } from 'vue';
 import {
+  HWP_ICON_URL,
   ICON_COLORS,
+  ICON_MARK_PATHS,
   ICON_PATHS,
   iconKindForExtension,
 } from '@/config/favicons';
@@ -11,28 +13,65 @@ const props = withDefaults(
     extension: string;
     size?: number;
   }>(),
-  { size: 40 },
+  { size: 36 },
 );
 
 const kind = computed(() => iconKindForExtension(props.extension.toLowerCase()));
+const mark = computed(() => ICON_MARK_PATHS[kind.value]);
+const boxStyle = computed(() => ({
+  width: `${props.size}px`,
+  height: `${props.size}px`,
+}));
 </script>
 
 <template>
-  <svg
-    class="ft-icon"
-    xmlns="http://www.w3.org/2000/svg"
-    viewBox="0 0 24 24"
-    :width="size"
-    :height="size"
-    aria-hidden="true"
-  >
-    <path :fill="ICON_COLORS[kind]" :d="ICON_PATHS[kind]" />
-  </svg>
+  <span class="ft-icon" :style="boxStyle" aria-hidden="true">
+    <img
+      v-if="kind === 'hwp'"
+      class="ft-icon__img"
+      :src="HWP_ICON_URL"
+      alt=""
+      draggable="false"
+    />
+    <svg
+      v-else
+      class="ft-icon__svg"
+      xmlns="http://www.w3.org/2000/svg"
+      viewBox="0 0 24 24"
+    >
+      <path :fill="ICON_COLORS[kind]" :d="ICON_PATHS[kind]" />
+      <path
+        v-if="mark"
+        fill="#ffffff"
+        fill-rule="evenodd"
+        :d="mark"
+      />
+    </svg>
+  </span>
 </template>
 
 <style scoped>
 .ft-icon {
   flex-shrink: 0;
+  display: inline-grid;
+  place-items: center;
+  box-sizing: border-box;
+  overflow: hidden;
+  border-radius: 4px;
+  line-height: 0;
+}
+
+.ft-icon__svg,
+.ft-icon__img {
   display: block;
+  width: 100%;
+  height: 100%;
+}
+
+/* Raster HWP logo is full-bleed; match SVG document inset (~3/24). */
+.ft-icon__img {
+  object-fit: contain;
+  padding: 12.5%;
+  box-sizing: border-box;
 }
 </style>
diff --git a/packages/frontend/src/composables/usePageTitle.ts b/packages/frontend/src/composables/usePageTitle.ts
index 723fb4a..ba81871 100644
--- a/packages/frontend/src/composables/usePageTitle.ts
+++ b/packages/frontend/src/composables/usePageTitle.ts
@@ -6,27 +6,44 @@ import {
   type MaybeRefOrGetter,
 } from 'vue';
 import { APP_DISPLAY_NAME } from '@/config/app';
-import { faviconHrefFor, setFavicon } from '@/config/favicons';
+import {
+  faviconHrefFor,
+  faviconHrefForKind,
+  setFavicon,
+  type FaviconKind,
+} from '@/config/favicons';
 
 export function formatPageTitle(filename?: string | null): string {
   const name = filename?.trim();
   return name ? `${name} - ${APP_DISPLAY_NAME}` : APP_DISPLAY_NAME;
 }
 
+export type UsePageTitleOptions = {
+  /** Force favicon kind (tools whose file extensions collide with other tools). */
+  faviconKind?: MaybeRefOrGetter<FaviconKind | null | undefined>;
+};
+
 /**
  * Sets `document.title` to `filename - Sejong Office` (or just the app name)
  * and swaps the favicon by file extension (home icon when no file).
+ * Pass `faviconKind` when the route should keep a fixed tool/viewer icon.
  */
 export function usePageTitle(
   filename: MaybeRefOrGetter<string | null | undefined> = null,
+  options?: UsePageTitleOptions,
 ) {
   function apply() {
     const name = toValue(filename);
     document.title = formatPageTitle(name);
-    setFavicon(faviconHrefFor(name));
+    const kind = options?.faviconKind != null ? toValue(options.faviconKind) : null;
+    setFavicon(kind ? faviconHrefForKind(kind) : faviconHrefFor(name));
   }
 
-  watch(() => toValue(filename), apply, { immediate: true });
+  watch(
+    () => [toValue(filename), toValue(options?.faviconKind)] as const,
+    apply,
+    { immediate: true },
+  );
   onMounted(apply);
   onActivated(apply);
 }
diff --git a/packages/frontend/src/composables/useSessionLifecycle.ts b/packages/frontend/src/composables/useSessionLifecycle.ts
index a63691f..801fc5e 100644
--- a/packages/frontend/src/composables/useSessionLifecycle.ts
+++ b/packages/frontend/src/composables/useSessionLifecycle.ts
@@ -2,6 +2,7 @@ import { onMounted, onUnmounted } from 'vue';
 import { createSession, endSession, heartbeat } from '@/api/client';
 
 const HWP_FILE_KEY = 'sejong_hwp_file';
+const HWP_OPEN_TOKEN_KEY = 'sejong_hwp_open_token';
 
 let pageHideBound = false;
 
@@ -31,6 +32,16 @@ export function storeHwpFile(file: File): Promise<void> {
   });
 }
 
+/** Bumps whenever a HWP/HWPX is staged for the editor (forces a fresh view). */
+export function hwpOpenToken(): string {
+  if (typeof sessionStorage === 'undefined') return '0';
+  return sessionStorage.getItem(HWP_OPEN_TOKEN_KEY) ?? '0';
+}
+
+function bumpHwpOpenToken(): void {
+  sessionStorage.setItem(HWP_OPEN_TOKEN_KEY, `${Date.now()}`);
+}
+
 export function storeHwpBuffer(name: string, buffer: ArrayBuffer): void {
   const bytes = new Uint8Array(buffer);
   let binary = '';
@@ -45,6 +56,7 @@ export function storeHwpBuffer(name: string, buffer: ArrayBuffer): void {
       base64: btoa(binary),
     }),
   );
+  bumpHwpOpenToken();
 }
 
 export function loadHwpFile(): { name: string; buffer: ArrayBuffer } | null {
@@ -68,6 +80,7 @@ export function loadHwpFile(): { name: string; buffer: ArrayBuffer } | null {
 
 export function clearHwpFile(): void {
   sessionStorage.removeItem(HWP_FILE_KEY);
+  sessionStorage.removeItem(HWP_OPEN_TOKEN_KEY);
 }
 
 export function useSessionLifecycle(options?: { enableHeartbeat?: boolean }) {
diff --git a/packages/frontend/src/config/favicons.ts b/packages/frontend/src/config/favicons.ts
index 9f50b67..bfd8444 100644
--- a/packages/frontend/src/config/favicons.ts
+++ b/packages/frontend/src/config/favicons.ts
@@ -4,6 +4,7 @@
  */
 
 import { extensionOf } from '@/config/app';
+import hwpIconUrl from '@/assets/icons/hwp.png';
 
 export type FaviconKind =
   | 'home'
@@ -23,15 +24,17 @@ export type FaviconKind =
   | 'csv'
   | 'file';
 
+/** Shared filled document plate for letter-mark office icons. */
+export const DOC_SHELL_PATH =
+  'M19,3H5C3.89,3 3,3.89 3,5V19A2,2 0 0,0 5,21H19A2,2 0 0,0 21,19V5C21,3.89 20.1,3 19,3Z';
+
 export const ICON_PATHS: Record<FaviconKind, string> = {
   home: 'M9,13H15V19H18V10L12,5.5L6,10V19H9V13M4,21V9L12,3L20,9V21H4Z',
-  pdf: 'M19 3H5C3.9 3 3 3.9 3 5V19C3 20.1 3.9 21 5 21H19C20.1 21 21 20.1 21 19V5C21 3.9 20.1 3 19 3M9.5 11.5C9.5 12.3 8.8 13 8 13H7V15H5.5V9H8C8.8 9 9.5 9.7 9.5 10.5V11.5M14.5 13.5C14.5 14.3 13.8 15 13 15H10.5V9H13C13.8 9 14.5 9.7 14.5 10.5V13.5M18.5 10.5H17V11.5H18.5V13H17V15H15.5V9H18.5V10.5M12 10.5H13V13.5H12V10.5M7 10.5H8V11.5H7V10.5Z',
-  word: 'M15.5,17H14L12,9.5L10,17H8.5L6.1,7H7.8L9.34,14.5L11.3,7H12.7L14.67,14.5L16.2,7H17.9M19,3H5C3.89,3 3,3.89 3,5V19A2,2 0 0,0 5,21H19A2,2 0 0,0 21,19V5C21,3.89 20.1,3 19,3Z',
-  excel:
-    'M16.2,17H14.2L12,13.2L9.8,17H7.8L11,12L7.8,7H9.8L12,10.8L14.2,7H16.2L13,12M19,3H5C3.89,3 3,3.89 3,5V19A2,2 0 0,0 5,21H19A2,2 0 0,0 21,19V5C21,3.89 20.1,3 19,3Z',
-  powerpoint:
-    'M9.8,13.4H12.3C13.8,13.4 14.46,13.12 15.1,12.58C15.74,12.03 16,11.25 16,10.23C16,9.26 15.75,8.5 15.1,7.88C14.45,7.29 13.83,7 12.3,7H8V17H9.8V13.4M19,3A2,2 0 0,1 21,5V19A2,2 0 0,1 19,21H5A2,2 0 0,1 3,19V5C3,3.89 3.9,3 5,3H19M9.8,12V8.4H12.1C12.76,8.4 13.27,8.65 13.6,9C13.93,9.35 14.1,9.72 14.1,10.24C14.1,10.8 13.92,11.19 13.6,11.5C13.28,11.81 12.9,12 12.22,12H9.8Z',
-  hwp: 'M17,4V10L15,8L13,10V4H9V20H19V4H17M3,7V5H5V4C5,2.89 5.9,2 7,2H19C20.05,2 21,2.95 21,4V20C21,21.05 20.05,22 19,22H7C5.95,22 5,21.05 5,20V19H3V17H5V13H3V11H5V7H3M5,5V7H7V5H5M5,19H7V17H5V19M5,13H7V11H5V13Z',
+  pdf: DOC_SHELL_PATH,
+  word: DOC_SHELL_PATH,
+  excel: DOC_SHELL_PATH,
+  powerpoint: DOC_SHELL_PATH,
+  hwp: DOC_SHELL_PATH,
   sketch: 'M3 17.25V21H6.75L17.81 9.94L14.06 6.19L3 17.25M20.71 7.04C21.1 6.65 21.1 6 20.71 5.63L18.37 3.29C18 2.9 17.35 2.9 16.96 3.29L15.13 5.12L18.88 8.87L20.71 7.04Z',
   code: 'M8 3L6.59 4.41L10.17 8L6.59 11.59L8 13L13 8L8 3M14 11V13H22V11H14M5 19H19V17H5V19Z',
   diagram: 'M4 3H10V9H8V11H16V9H14V3H20V9H18V13H13V15H16V21H8V15H11V13H6V9H4V3M6 5V7H8V5H6M16 5V7H18V5H16M10 17V19H14V17H10Z',
@@ -45,13 +48,32 @@ export const ICON_PATHS: Record<FaviconKind, string> = {
   file: 'M6,2A2,2 0 0,0 4,4V20A2,2 0 0,0 6,22H18A2,2 0 0,0 20,20V8L14,2H6M6,4H13V9H18V20H6V4M8,12V14H16V12H8M8,16V18H13V16H8Z',
 };
 
+/**
+ * White glyphs drawn on `DOC_SHELL_PATH` (evenodd for letter counters).
+ * Paths adapted from Material Design Icons (@mdi/svg), Apache-2.0.
+ */
+export const ICON_MARK_PATHS: Partial<Record<FaviconKind, string>> = {
+  pdf:
+    'M9.5,11.5C9.5,12.3 8.8,13 8,13H7V15H5.5V9H8C8.8,9 9.5,9.7 9.5,10.5V11.5M7,10.5H8V11.5H7V10.5Z' +
+    'M14.5,13.5C14.5,14.3 13.8,15 13,15H10.5V9H13C13.8,9 14.5,9.7 14.5,10.5V13.5M12,10.5H13V13.5H12V10.5Z' +
+    'M18.5,10.5H17V11.5H18.5V13H17V15H15.5V9H18.5V10.5Z',
+  word: 'M15.5,17H14L12,9.5L10,17H8.5L6.1,7H7.8L9.34,14.5L11.3,7H12.7L14.67,14.5L16.2,7H17.9Z',
+  excel:
+    'M16.2,17H14.2L12,13.2L9.8,17H7.8L11,12L7.8,7H9.8L12,10.8L14.2,7H16.2L13,12Z',
+  powerpoint:
+    'M9.8,13.4H12.3C13.8,13.4 14.46,13.12 15.1,12.58C15.74,12.03 16,11.25 16,10.23C16,9.26 15.75,8.5 15.1,7.88C14.45,7.29 13.83,7 12.3,7H8V17H9.8V13.4M9.8,12V8.4H12.1C12.76,8.4 13.27,8.65 13.6,9C13.93,9.35 14.1,9.72 14.1,10.24C14.1,10.8 13.92,11.19 13.6,11.5C13.28,11.81 12.9,12 12.22,12H9.8Z',
+};
+
+/** Raster logo for Hangul (HWP) documents. */
+export const HWP_ICON_URL = hwpIconUrl;
+
 export const ICON_COLORS: Record<FaviconKind, string> = {
   home: '#0f6cbd',
   pdf: '#e53935',
   word: '#1e88e5',
   excel: '#43a047',
   powerpoint: '#fb8c00',
-  hwp: '#00897b',
+  hwp: '#34aee7',
   sketch: '#7b61a8',
   code: '#d97706',
   diagram: '#2e7d8a',
@@ -122,8 +144,20 @@ const EXT_KIND: Record<string, FaviconKind> = {
   txt: 'text',
 };
 
+export function iconSvgInner(kind: FaviconKind): string {
+  const color = ICON_COLORS[kind];
+  const mark = ICON_MARK_PATHS[kind];
+  if (mark) {
+    return (
+      `<path fill="${color}" d="${ICON_PATHS[kind]}"/>` +
+      `<path fill="#ffffff" fill-rule="evenodd" d="${mark}"/>`
+    );
+  }
+  return `<path fill="${color}" d="${ICON_PATHS[kind]}"/>`;
+}
+
 function toDataUri(kind: FaviconKind): string {
-  const svg = `<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path fill="${ICON_COLORS[kind]}" d="${ICON_PATHS[kind]}"/></svg>`;
+  const svg = `<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24">${iconSvgInner(kind)}</svg>`;
   return `data:image/svg+xml,${encodeURIComponent(svg)}`;
 }
 
@@ -133,6 +167,16 @@ export function iconKindForExtension(ext: string): FaviconKind {
   return EXT_KIND[ext] ?? 'file';
 }
 
+export function faviconHrefForKind(kind: FaviconKind): string {
+  if (kind === 'hwp') return HWP_ICON_URL;
+  let href = CACHE.get(kind);
+  if (!href) {
+    href = toDataUri(kind);
+    CACHE.set(kind, href);
+  }
+  return href;
+}
+
 export function faviconHrefFor(filename?: string | null): string {
   const name = filename?.trim();
   let kind: FaviconKind = 'home';
@@ -140,12 +184,7 @@ export function faviconHrefFor(filename?: string | null): string {
     const ext = extensionOf(name);
     kind = ext ? (EXT_KIND[ext] ?? 'file') : 'home';
   }
-  let href = CACHE.get(kind);
-  if (!href) {
-    href = toDataUri(kind);
-    CACHE.set(kind, href);
-  }
-  return href;
+  return faviconHrefForKind(kind);
 }
 
 export function setFavicon(href: string) {
@@ -155,7 +194,10 @@ export function setFavicon(href: string) {
     link.rel = 'icon';
     document.head.appendChild(link);
   }
-  link.type = 'image/svg+xml';
+  link.type =
+    /\.png(?:\?|$)/i.test(href) || href.startsWith('data:image/png')
+      ? 'image/png'
+      : 'image/svg+xml';
   // Bust stubborn tab caches when switching between data URIs
   if (link.href !== href) {
     link.href = href;
diff --git a/packages/frontend/src/views/CadViewerView.vue b/packages/frontend/src/views/CadViewerView.vue
index 1181866..68e2c09 100644
--- a/packages/frontend/src/views/CadViewerView.vue
+++ b/packages/frontend/src/views/CadViewerView.vue
@@ -39,7 +39,7 @@ const error = ref('');
 const notice = ref('');
 const theme = useSystemTheme();
 
-usePageTitle(filename);
+usePageTitle(filename, { faviconKind: 'cad' });
 
 const settings = AcApSettingManager.instance;
 settings.set('isShowCommandLine', false);
diff --git a/packages/frontend/src/views/DrawioEditorView.vue b/packages/frontend/src/views/DrawioEditorView.vue
index 5c1e090..09ea784 100644
--- a/packages/frontend/src/views/DrawioEditorView.vue
+++ b/packages/frontend/src/views/DrawioEditorView.vue
@@ -154,7 +154,6 @@ function onClose() {
     <div class="editor-page">
       <EditorToolbar
         :filename="filename"
-        save-label="원본 저장"
         :show-export-actions="true"
         :show-filename="false"
         :busy="busy || !ready"
diff --git a/packages/frontend/src/views/ExcalidrawEditorView.vue b/packages/frontend/src/views/ExcalidrawEditorView.vue
index 8517e11..31ce5bf 100644
--- a/packages/frontend/src/views/ExcalidrawEditorView.vue
+++ b/packages/frontend/src/views/ExcalidrawEditorView.vue
@@ -135,7 +135,6 @@ function onClose() {
     <div class="editor-page">
       <EditorToolbar
         :filename="filename"
-        save-label="원본 저장"
         :show-export-actions="true"
         :busy="busy"
         @open="onOpen"
diff --git a/packages/frontend/src/views/HomeView.vue b/packages/frontend/src/views/HomeView.vue
index 09fc93f..027db89 100644
--- a/packages/frontend/src/views/HomeView.vue
+++ b/packages/frontend/src/views/HomeView.vue
@@ -364,6 +364,11 @@ function onOpenTool(route: string) {
     border-color 0.15s ease;
 }
 
+.tile :deep(.ft-icon) {
+  width: 36px;
+  height: 36px;
+}
+
 .tile:hover:not(:disabled) {
   background: var(--card-hover);
   border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
diff --git a/packages/frontend/src/views/MermaidEditorView.vue b/packages/frontend/src/views/MermaidEditorView.vue
index bc4d003..0ffd9e9 100644
--- a/packages/frontend/src/views/MermaidEditorView.vue
+++ b/packages/frontend/src/views/MermaidEditorView.vue
@@ -176,7 +176,6 @@ function onClose() {
     <div class="editor-page">
       <EditorToolbar
         :filename="filename"
-        save-label="원본 저장"
         :show-export-actions="true"
         :busy="busy"
         @open="onOpen"
diff --git a/packages/frontend/src/views/Model3DViewerView.vue b/packages/frontend/src/views/Model3DViewerView.vue
index 0e95d21..f4ed10d 100644
--- a/packages/frontend/src/views/Model3DViewerView.vue
+++ b/packages/frontend/src/views/Model3DViewerView.vue
@@ -85,7 +85,7 @@ const propertyGroups = computed(() =>
   selectedKey.value ? selectionGroups.value : modelGroups.value,
 );
 
-usePageTitle(filename);
+usePageTitle(filename, { faviconKind: 'model3d' });
 
 function applyFiles(nextFiles: File[]) {
   const primary = findPrimaryModelFile(nextFiles);
@@ -257,7 +257,6 @@ function onClose() {
     >
       <EditorToolbar
         :filename="filename"
-        save-label="내보내기"
         :show-save="Boolean(stats)"
         :busy="loading || exportBusy"
         @open="onOpen"
diff --git a/packages/frontend/src/views/OnlyOfficeEditorView.vue b/packages/frontend/src/views/OnlyOfficeEditorView.vue
index e4f7414..a436242 100644
--- a/packages/frontend/src/views/OnlyOfficeEditorView.vue
+++ b/packages/frontend/src/views/OnlyOfficeEditorView.vue
@@ -2,9 +2,10 @@
 import { nextTick, onActivated, onMounted, onUnmounted, ref } from 'vue';
 import { useRoute, useRouter } from 'vue-router';
 import AppShell from '@/components/AppShell.vue';
+import DownloadGuideModal from '@/components/DownloadGuideModal.vue';
 import EditorErrorState from '@/components/EditorErrorState.vue';
 import EditorToolbar from '@/components/EditorToolbar.vue';
-import { downloadDocumentUrl, fetchEditorConfig } from '@/api/client';
+import { fetchEditorConfig } from '@/api/client';
 import { useOpenDocument } from '@/composables/useOpenDocument';
 import { usePageTitle } from '@/composables/usePageTitle';
 import { useSessionLifecycle } from '@/composables/useSessionLifecycle';
@@ -15,6 +16,7 @@ const route = useRoute();
 const router = useRouter();
 const error = ref<unknown>(null);
 const filename = ref('문서');
+const guideOpen = ref(false);
 const frameHost = ref<HTMLElement | null>(null);
 const fileInput = ref<HTMLInputElement | null>(null);
 let editor: { destroyEditor?: () => void } | null = null;
@@ -27,6 +29,12 @@ const { openDocument } = useOpenDocument();
 usePageTitle(filename);
 useSessionLifecycle({ enableHeartbeat: true });
 
+const downloadGuideSteps = [
+  '편집기 좌측 상단의 파일을 누릅니다.',
+  '다운로드 방법을 선택합니다.',
+  '원하는 확장자를 고르면 파일이 저장됩니다.',
+];
+
 function editorHeightPx(): number {
   const host = frameHost.value;
   if (host) {
@@ -123,15 +131,8 @@ function onFileSelected(e: Event) {
   input.value = '';
 }
 
-function onSave() {
-  const docId = route.params.docId as string;
-  const a = document.createElement('a');
-  a.href = downloadDocumentUrl(docId);
-  a.download = filename.value;
-  a.rel = 'noopener';
-  document.body.appendChild(a);
-  a.click();
-  a.remove();
+function onDownload() {
+  guideOpen.value = true;
 }
 
 function onClose() {
@@ -147,7 +148,7 @@ function onClose() {
         :filename="filename"
         :show-filename="false"
         @open="onOpen"
-        @save="onSave"
+        @save="onDownload"
         @close="onClose"
       />
       <input
@@ -162,6 +163,14 @@ function onClose() {
       <div v-show="!error" ref="frameHost" class="editor-frame">
         <div id="onlyoffice-placeholder" class="editor-frame__inner" />
       </div>
+
+      <DownloadGuideModal
+        :open="guideOpen"
+        lead="수정한 파일은 EuroOffice 편집기 메뉴에서 받을 수 있습니다."
+        :steps="downloadGuideSteps"
+        path-hint="파일 → 다운로드 방법 → 확장자 선택"
+        @close="guideOpen = false"
+      />
     </div>
   </AppShell>
 </template>
diff --git a/packages/frontend/src/views/RhwpEditorView.vue b/packages/frontend/src/views/RhwpEditorView.vue
index 0de46a1..6d945e1 100644
--- a/packages/frontend/src/views/RhwpEditorView.vue
+++ b/packages/frontend/src/views/RhwpEditorView.vue
@@ -1,37 +1,47 @@
 <script setup lang="ts">
-import { onMounted, onUnmounted, ref } from 'vue';
+import { nextTick, onActivated, onMounted, onUnmounted, ref } from 'vue';
 import { useRouter } from 'vue-router';
 import { createEditor, type RhwpEditor } from '@rhwp/editor';
 import AppShell from '@/components/AppShell.vue';
+import DownloadGuideModal from '@/components/DownloadGuideModal.vue';
 import EditorErrorState from '@/components/EditorErrorState.vue';
 import EditorToolbar from '@/components/EditorToolbar.vue';
 import { ApiError } from '@/api/client';
-import { extensionOf, isHwp } from '@/config/app';
+import { isHwp } from '@/config/app';
 import { usePageTitle } from '@/composables/usePageTitle';
 import {
   clearHwpFile,
+  hwpOpenToken,
   loadHwpFile,
   storeHwpFile,
   useSessionLifecycle,
 } from '@/composables/useSessionLifecycle';
-import { downloadBlob } from '@/utils/downloadBlob';
 
 defineOptions({ name: 'RhwpEditorView' });
 
 const router = useRouter();
 const error = ref<unknown>(null);
 const filename = ref('문서.hwp');
+const guideOpen = ref(false);
 const fileInput = ref<HTMLInputElement | null>(null);
 let editor: RhwpEditor | null = null;
-let initialized = false;
+let loadedToken = '';
+let loadSeq = 0;
 
 usePageTitle(filename);
 useSessionLifecycle({ enableHeartbeat: true });
 
-onMounted(async () => {
-  if (initialized) return;
+const downloadGuideSteps = [
+  '편집기 메뉴에서 파일을 누릅니다.',
+  '저장 또는 다른 이름으로 저장을 선택합니다.',
+  '원하는 위치와 이름으로 저장합니다.',
+];
 
+async function bootstrapFromStore() {
+  const seq = ++loadSeq;
+  const token = hwpOpenToken();
   const stored = loadHwpFile();
+
   if (!stored) {
     error.value = new ApiError(
       404,
@@ -41,25 +51,51 @@ onMounted(async () => {
     return;
   }
 
+  // Same staged file already shown (e.g. mounted + activated).
+  if (editor && loadedToken === token && loadedToken !== '0') {
+    filename.value = stored.name;
+    error.value = null;
+    return;
+  }
+
   filename.value = stored.name;
   error.value = null;
 
   try {
-    editor = await createEditor('#rhwp-host', {
-      width: '100%',
-      height: '100%',
-    });
+    await nextTick();
+    if (seq !== loadSeq) return;
+
+    if (!editor) {
+      editor = await createEditor('#rhwp-host', {
+        width: '100%',
+        height: '100%',
+      });
+    }
+    if (seq !== loadSeq) return;
+
     await editor.loadFile(stored.buffer, stored.name);
-    initialized = true;
+    if (seq !== loadSeq) return;
+
+    loadedToken = token;
   } catch (err) {
+    if (seq !== loadSeq) return;
     error.value = err;
   }
+}
+
+onMounted(() => {
+  void bootstrapFromStore();
+});
+
+onActivated(() => {
+  void bootstrapFromStore();
 });
 
 onUnmounted(() => {
+  loadSeq += 1;
   editor?.destroy();
   editor = null;
-  initialized = false;
+  loadedToken = '';
 });
 
 function onOpen() {
@@ -70,7 +106,7 @@ async function onFileSelected(e: Event) {
   const input = e.target as HTMLInputElement;
   const file = input.files?.[0];
   input.value = '';
-  if (!file || !editor) return;
+  if (!file) return;
 
   if (!isHwp(file.name)) {
     error.value = new ApiError(
@@ -83,30 +119,16 @@ async function onFileSelected(e: Event) {
 
   try {
     await storeHwpFile(file);
-    const stored = loadHwpFile();
-    if (!stored) throw new Error('파일을 읽을 수 없습니다.');
-    await editor.loadFile(stored.buffer, stored.name);
-    filename.value = stored.name;
-    error.value = null;
+    // Token bump remounts via App viewKey; also reload in place if not remounted.
+    loadedToken = '';
+    await bootstrapFromStore();
   } catch (err) {
     error.value = err;
   }
 }
 
-async function onSave() {
-  if (!editor) return;
-  try {
-    const ext = extensionOf(filename.value);
-    const bytes =
-      ext === 'hwpx' ? await editor.exportHwpx() : await editor.exportHwp();
-    const name =
-      ext === 'hwpx' || ext === 'hwp'
-        ? filename.value
-        : `${filename.value}.hwp`;
-    downloadBlob(bytes, name);
-  } catch (err) {
-    error.value = err;
-  }
+async function onDownload() {
+  guideOpen.value = true;
 }
 
 function onClose() {
@@ -122,7 +144,7 @@ function onClose() {
         v-if="!error"
         :filename="filename"
         @open="onOpen"
-        @save="onSave"
+        @save="onDownload"
         @close="onClose"
       />
       <input
@@ -135,6 +157,14 @@ function onClose() {
 
       <EditorErrorState v-if="error" :error="error" context="rhwp" />
       <div v-show="!error" id="rhwp-host" class="editor-frame" />
+
+      <DownloadGuideModal
+        :open="guideOpen"
+        lead="수정한 한글 문서는 rhwp 편집기 메뉴에서 받을 수 있습니다."
+        :steps="downloadGuideSteps"
+        path-hint="파일 → 저장(다른 이름으로 저장)"
+        @close="guideOpen = false"
+      />
     </div>
   </AppShell>
 </template>
diff --git a/packages/frontend/src/views/ToolsBgRemoveView.vue b/packages/frontend/src/views/ToolsBgRemoveView.vue
index 2de7130..d6a60dc 100644
--- a/packages/frontend/src/views/ToolsBgRemoveView.vue
+++ b/packages/frontend/src/views/ToolsBgRemoveView.vue
@@ -29,7 +29,7 @@ const feather = ref(DEFAULT_BG_REMOVE_OPTIONS.feather);
 const mode = ref<BgRemoveMode>(DEFAULT_BG_REMOVE_OPTIONS.mode);
 const imageUrlInput = ref('');
 
-usePageTitle(filename);
+usePageTitle(filename, { faviconKind: 'bgremove' });
 
 const hasImage = computed(() => Boolean(sourceUrl.value));
 const bgCss = computed(() => {
@@ -197,7 +197,6 @@ onBeforeUnmount(() => {
     >
       <EditorToolbar
         :filename="filename"
-        save-label="PNG 저장"
         :show-save="Boolean(resultUrl)"
         :busy="busy"
         @open="onOpen"
diff --git a/packages/frontend/src/views/ToolsScannerView.vue b/packages/frontend/src/views/ToolsScannerView.vue
index 135d02c..f34560f 100644
--- a/packages/frontend/src/views/ToolsScannerView.vue
+++ b/packages/frontend/src/views/ToolsScannerView.vue
@@ -75,7 +75,7 @@ function syncBodyScrollLock() {
     queueOpen.value || settingsOpen.value ? 'hidden' : '';
 }
 
-usePageTitle(filename);
+usePageTitle(filename, { faviconKind: 'scanner' });
 
 const activePage = computed(
   () => pages.value.find((page) => page.id === activeId.value) ?? null,
@@ -615,7 +615,6 @@ const progressPercent = computed(() =>
     <div class="scan-page">
       <EditorToolbar
         :filename="filename"
-        save-label="PDF 저장"
         :show-save="pages.length > 0"
         :busy="busy"
         @open="onOpen"