diff --git a/AGENTS.md b/AGENTS.md
index 0f8656b..4b2ba1c 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -59,7 +59,7 @@
 - **构建纯度门**：client bundle 禁止 value-import `@dsh-external/*` 或非白名单 `@deepseek-ai/*`（`tsdown.config.ts` 拦截）；`import type {}` 被擦除不触发——类型可共享，运行时符号不行；跨插件交互走 `ctx.betterSidebar` 方法调用。
 - **懒加载 chunk**：重依赖（xterm/CodeMirror/mermaid）在独立 bundle（`lib/client-<name>.js`），经 `/sidebar/bundle` 按需下发、`globalThis.__dshChunks__` 物化（`src/client/chunk-loader.ts`），**核心 bundle 禁止静态 import `src/client/chunks/*`**。
 - **i18n**：词典在 `betterSidebar` 命名空间，跟随 DSH `ctx.locale`；**新增 zh key 必须同步 `src/client/locales-ja.ts` 的 ja 翻译**（否则 ja 下回退 en）。渲染 `MarkdownText` 必须经 `markdownTextProps()`（§3 第 3 条）。
-- **皮肤契约**：视觉值只消费 `--dsw-alias-*` / `--dsw-font-*` / `--ds-*` 令牌，无硬编码颜色；契约全文与 titleBar 四方案模型见[指南 §12](docs/external-plugin-guide.md)，改动必须同步该节与 `tests/theme.spec.ts`。
+- **皮肤契约**：视觉值只消费 `--dsw-alias-*` / `--dsw-font-*` / `--ds-*` 令牌，无硬编码颜色（**唯一豁免**：可选彩色图标主题 `src/client/chunks/file-icons.tsx`，品牌色是内容非 chrome，且只在懒加载 chunk + 用户显式开启；核心图标模块零颜色字面量由 `tests/theme.spec.ts` 守护）；契约全文与 titleBar 四方案模型见[指南 §12](docs/external-plugin-guide.md)，改动必须同步该节与 `tests/theme.spec.ts`。
 - **契约反向引用**：皮肤契约被 `src/client/shell-presets.ts`、`tests/e2e/mount.e2e.ts` 的注释以「指南 §12」引用——调整指南章节结构时同步检查这两处。
 - **接入 API 即文档**：`src/client/service.ts` 与 `src/client/builtins/` 的任何行为变更，必须同步 [docs/external-plugin-guide.md](docs/external-plugin-guide.md)（唯一权威接入文档，不再双份维护）。
 
diff --git a/README.md b/README.md
index d5019ca..1142be4 100644
--- a/README.md
+++ b/README.md
@@ -265,7 +265,8 @@ GitHub topic [`dsh-better-sidebar`](https://github.com/topics/dsh-better-sidebar
 
 ### v0.19.0（未发布）
 
-- 🎨 **文件图标多样化 + 对外图标注册 API（[file-icons.tsx](./src/client/file-icons.tsx)）**：文件树与编辑器文件 tab 不再是单一 `VscFile`——markdown / 图片媒体 / PDF / JSON / 40+ 代码扩展 / 配置 / 数据库 / lock / 压缩包各有专属 glyph（VSCodicons 单色 `currentColor`，遵循皮肤契约），未知扩展回退通用图标。`ctx.betterSidebar` 新增 `registerFileIcon`（`features` 含 `'fileIcons'`）：按扩展名注册自定义图标（彩色 ReactNode 亦可，颜色责任在注册方），`exts: []` 为全局默认（只兜内置 glyph 没认领的扩展，不吞掉内置多样性），保留扩展名 `'folder'` / `'folder-open'` 可换目录行图标；`fileIcon` / `folderIcon` 为权威解析器（完整回退链 + 逐工厂崩溃隔离），注册/注销即时生效。接入示例见[外部插件指南 §7](./docs/external-plugin-guide.md)。
+- 🎨 **可选彩色图标主题**：设置页「文件 → 文件图标」可在**内置单色**与**彩色品牌图标**之间切换——彩色主题含 563 条规则（218 扩展名 + 197 精确文件名 + 148 目录名，如 `.tsx → React`、`package.json → npm`、`node_modules` 着色），数据在**懒加载 chunk**（`lib/client-file-icons.js`）里，只有选中时才下载，默认关闭时启动零开销。数据源自 [#429](https://github.com/omdsh-dev/DSH-better-sidebar/pull/429)（@fenter）。
+- 🎨 **文件图标多样化 + 对外图标注册 API（[file-icons.tsx](./src/client/file-icons.tsx)）**：文件树与编辑器文件 tab 不再是单一 `VscFile`——markdown / 图片媒体 / PDF / JSON / 40+ 代码扩展 / 配置 / 数据库 / lock / 压缩包各有专属 glyph（VSCodicons 单色 `currentColor`，遵循皮肤契约），未知扩展回退通用图标。`ctx.betterSidebar` 新增 `registerFileIcon`（`features` 含 `'fileIcons'`）：按扩展名 / 精确文件名（`names`）/ 目录名（`folderNames`）注册自定义图标（彩色 ReactNode 亦可，颜色责任在注册方），`exts: []` 为全局默认（只兜内置 glyph 没认领的扩展，不吞掉内置多样性），保留扩展名 `'folder'` / `'folder-open'` 可换目录行图标；`fileIcon` / `folderIcon` 为权威解析器（完整回退链 + 逐工厂崩溃隔离），注册/注销即时生效。接入示例见[外部插件指南 §7](./docs/external-plugin-guide.md)。
 
 ### v0.18.1
 
diff --git a/docs/external-plugin-guide.md b/docs/external-plugin-guide.md
index 058c21f..71dd437 100644
--- a/docs/external-plugin-guide.md
+++ b/docs/external-plugin-guide.md
@@ -722,6 +722,16 @@ if (ctx.betterSidebar.features.includes('fileIcons')) {
 注册/注销即时生效（文件树与 tab 栏订阅注册表变化自动重渲染）；图标工厂抛错会被吞掉
 （console.error 后跳到回退链下一级），不会空白行。
 
+**内置的可选彩色图标主题**（v0.19.0+，设置页「文件 → 文件图标」）：
+
+- `'builtin'`（默认）＝上面的单色 glyph 映射，零额外加载。
+- `'colored'`＝563 条品牌/通用彩色规则（218 扩展名 + 197 文件名 + 148 目录名），
+  数据在**懒加载 chunk** `lib/client-file-icons.js`（`/sidebar/bundle/file-icons.js`），
+  只有用户选中时才拉取，选中后走 `registerFileIcon` 注册、切回即注销（`src/client/file-icon-theme.ts`）。
+  数据来自 [PR #429](https://github.com/omdsh-dev/DSH-better-sidebar/pull/429)（@fenter）。
+- 因此彩色图标是**皮肤契约 §12 的唯一豁免面**：品牌色是内容而非 chrome，不能走
+  `--dsw-alias-*`；豁免只覆盖这个 chunk（核心图标模块零颜色字面量，由 `tests/theme.spec.ts` 守护）。
+
 **版本与能力探测**（v0.12.0+）：消费插件先查能力再使用新 API，老版本（或旧 DSH）下优雅降级：
 
 ```ts
@@ -852,6 +862,13 @@ ctx.effect(() =>
 ## 12. 皮肤兼容（令牌驱动）
 
 > better-sidebar 所有视觉值消费 DSH 的 `--dsw-alias-*` / `--dsw-font-*` / `--ds-*` 令牌（无硬编码颜色），**不做每皮肤适配**。已与 dsh-web-ui 皮肤中心兼容（10 款皮肤全覆盖 `--dsw-alias-*` 层；`tests/theme.spec.ts` 守护）。你的 tab/viewer 组件遵循同样的令牌规则即可自动兼容全部皮肤。
+>
+> **唯一豁免面**：可选彩色文件图标主题（`fileIconTheme: 'colored'`）在
+> `src/client/chunks/file-icons.tsx` 内硬编码品牌色——品牌色是内容标识而非 chrome，无法
+> 映射到语义令牌；豁免的三个前提是「用户显式开启」「数据只在懒加载 chunk」「核心图标
+> 模块零颜色字面量」（`tests/theme.spec.ts` 的 boundary 用例守护）。插件自己注册的
+> 图标（`registerFileIcon`）颜色由注册方负责，同样不受本节令牌约束，但**不要**把彩色
+> 图标塞进核心 bundle 的常驻渲染路径。
 
 ### 12.1 规则
 
diff --git a/src/bundle-route.ts b/src/bundle-route.ts
index 4f098ec..24b9147 100644
--- a/src/bundle-route.ts
+++ b/src/bundle-route.ts
@@ -19,7 +19,7 @@ import { fileURLToPath } from 'node:url'
 import type { Context, SidebarHttpRequest, SidebarHttpResponse } from './context-types.ts'
 
 /** The chunk names the client may request (mirror of src/client/chunk-loader.ts). */
-export const CHUNK_NAMES = ['terminal', 'editor', 'mermaid', 'locale'] as const
+export const CHUNK_NAMES = ['terminal', 'editor', 'mermaid', 'locale', 'file-icons'] as const
 export type ChunkName = (typeof CHUNK_NAMES)[number]
 
 /** Directory of this host-half module (lib/ — the chunk scripts live next to it). */
diff --git a/src/client/builtins/tabs.tsx b/src/client/builtins/tabs.tsx
index 1a73d66..502b84d 100644
--- a/src/client/builtins/tabs.tsx
+++ b/src/client/builtins/tabs.tsx
@@ -8,7 +8,7 @@
  * `browser:<n>` the same way (no quota). The editor IS the files window
  * (the old standalone explorer merged into it).
  */
-import { IconCodeOutline16, IconFolderOpen16, IconNewChatOutline16, IconPanelLeftOutline16, IconThinkOutline16 } from '@deepseek-ai/dsh-client-ui-primitives'
+import { IconCodeOutline16, IconFolderOpen16, IconFolderOpenOutline16, IconNewChatOutline16, IconPanelLeftOutline16, IconSparkle16, IconThinkOutline16 } from '@deepseek-ai/dsh-client-ui-primitives'
 import type { Context } from '../../context-types.ts'
 import { allLeaves, isAgentTabId, type SidebarState } from '../state.ts'
 import { t } from '../locales.ts'
@@ -121,6 +121,28 @@ export function builtinTabs(ctx: Context, options: BuiltinTabOptions = {}): read
           key: 'workspaceFence',
           title: () => t('settingsFenceTitle'),
           desc: () => t('settingsFenceDesc'),
+        }, {
+          // The file-icon theme: monochrome built-in glyphs (default) vs the
+          // optional colored brand dataset, which is fetched from the lazy
+          // `file-icons` chunk only when picked (see file-icon-theme.ts).
+          key: 'fileIconTheme',
+          type: 'select',
+          title: () => t('settingsFileIconThemeTitle'),
+          desc: () => t('settingsFileIconThemeDesc'),
+          options: [
+            {
+              value: 'builtin',
+              icon: (size: number) => <IconFolderOpenOutline16 size={size} />,
+              title: () => t('settingsFileIconThemeBuiltin'),
+              desc: () => t('settingsFileIconThemeBuiltinDesc'),
+            },
+            {
+              value: 'colored',
+              icon: (size: number) => <IconSparkle16 size={size} />,
+              title: () => t('settingsFileIconThemeColored'),
+              desc: () => t('settingsFileIconThemeColoredDesc'),
+            },
+          ],
         }],
         render: ({ pluginSettings, updatePluginSetting }) => (
           <OpenWithSettings pluginSettings={pluginSettings} updatePluginSetting={updatePluginSetting} />
diff --git a/src/client/chunk-loader.ts b/src/client/chunk-loader.ts
index d89fdbf..e5181be 100644
--- a/src/client/chunk-loader.ts
+++ b/src/client/chunk-loader.ts
@@ -50,7 +50,7 @@
  * client.js); an edit that does land while a core HMR happens is caught by
  * the ETag comparison on the next activation.
  */
-export type ChunkName = 'terminal' | 'editor' | 'mermaid' | 'locale'
+export type ChunkName = 'terminal' | 'editor' | 'mermaid' | 'locale' | 'file-icons'
 
 /** The module exports a chunk factory provides (namespace-ish record). */
 export type ChunkExports = Record<string, unknown>
diff --git a/src/client/chunks/file-icons.tsx b/src/client/chunks/file-icons.tsx
index 29ac96d..c4b93f7 100644
--- a/src/client/chunks/file-icons.tsx
+++ b/src/client/chunks/file-icons.tsx
@@ -20,6 +20,7 @@
  * imported by the core bundle; keep it that way.
  */
 import type { ReactNode } from 'react'
+import type { BetterSidebarService, FileIconDescriptor } from '../service.ts'
 import {
   SiAngular, SiApple, SiAstro, SiBabel, SiBiome, SiBun, SiC, SiClojure,
   SiCmake, SiCoffeescript, SiComposer, SiConventionalcommits, SiCplusplus,
@@ -38,7 +39,7 @@ import {
 } from 'react-icons/si'
 import {
   VscBook, VscFile, VscFileBinary, VscFileCode, VscFileMedia, VscFilePdf,
-  VscFileText, VscFileZip, VscJson, VscKey,
+  VscFileText, VscFileZip, VscFolder, VscFolderOpened, VscJson, VscKey,
   VscMap, VscMusic, VscSettings, VscTerminalCmd, VscTerminalPowershell
 } from 'react-icons/vsc'
 import type { IconType } from 'react-icons'
@@ -692,3 +693,81 @@ export const FOLDER_COLOR: Record<string, string> = {
   ios: '#000000',
   Platforms: '#3178C6',
 }
+
+// ── Registration ────────────────────────────────────────────────────────
+
+/**
+ * Register the dataset through the public `registerFileIcon` API: one
+ * descriptor per distinct glyph+color (the resolver walks descriptors per
+ * row, so 563 rules collapse into ~250 registrations), plus one per folder
+ * tint. Returns a disposer that removes every registration.
+ *
+ * Folder tints ride `folderNames` only — they claim the directories they
+ * name, never every folder, so unnamed directories keep the built-in glyphs.
+ */
+export function registerColoredFileIcons(service: BetterSidebarService): () => void {
+  const disposers: (() => void)[] = []
+  const register = (descriptor: FileIconDescriptor): void => {
+    disposers.push(service.registerFileIcon(descriptor))
+  }
+  let seq = 0
+
+  // Extensions: group the table by (glyph, color) → one descriptor per group.
+  for (const [Icon, byColor] of groupByGlyph(FILE_ICON_BY_EXT)) {
+    for (const [color, exts] of byColor) {
+      register({
+        id: `colored:ext:${seq++}`,
+        exts,
+        icon: (_path, size) => colored({ Icon, color }, size),
+      })
+    }
+  }
+
+  // Exact file names (package.json, Dockerfile, …): same grouping, name rules.
+  for (const [Icon, byColor] of groupByGlyph(FILE_ICON_BY_NAME)) {
+    for (const [color, names] of byColor) {
+      register({
+        id: `colored:name:${seq++}`,
+        names,
+        icon: (_path, size) => colored({ Icon, color }, size),
+      })
+    }
+  }
+
+  // Directory tints: VscFolder/VscFolderOpened in the rule's color, grouped
+  // by color (the folder table maps name → color, not name → glyph).
+  const foldersByColor = new Map<string, string[]>()
+  for (const [name, color] of Object.entries(FOLDER_COLOR)) {
+    const names = foldersByColor.get(color)
+    if (names === undefined) foldersByColor.set(color, [name])
+    else names.push(name)
+  }
+  for (const [color, folderNames] of foldersByColor) {
+    register({
+      id: `colored:folder:${seq++}`,
+      folderNames,
+      icon: (_path, size, open) => open === true
+        ? <VscFolderOpened size={size} style={{ color }} />
+        : <VscFolder size={size} style={{ color }} />,
+    })
+  }
+
+  return () => { for (const dispose of disposers) dispose() }
+}
+
+/** Regroup one name→{Icon,color} table into Icon → color → keys. */
+function groupByGlyph(table: Partial<Record<string, IconEntry>>): Map<IconType, Map<string, string[]>> {
+  const grouped = new Map<IconType, Map<string, string[]>>()
+  for (const [key, entry] of Object.entries(table)) {
+    if (entry === undefined) continue
+    let byColor = grouped.get(entry.Icon)
+    if (byColor === undefined) {
+      byColor = new Map()
+      grouped.set(entry.Icon, byColor)
+    }
+    const keys = byColor.get(entry.color)
+    if (keys === undefined) byColor.set(entry.color, [key])
+    else keys.push(key)
+  }
+  return grouped
+}
diff --git a/src/client/file-icon-theme.ts b/src/client/file-icon-theme.ts
new file mode 100644
index 0000000..9753a5f
--- /dev/null
+++ b/src/client/file-icon-theme.ts
@@ -0,0 +1,80 @@
+/**
+ * The optional colored file-icon theme (pref `fileIconTheme`).
+ *
+ * `'builtin'` (the default) is the monochrome glyph map the tree already
+ * uses — nothing to do. `'colored'` fetches the lazy `file-icons` chunk
+ * (~160 brand glyphs + 563 rules) and registers it through the public
+ * `registerFileIcon` API; switching back disposes those registrations. The
+ * chunk is only fetched when the user picks the theme, so the startup bundle
+ * never carries icon data it may not render.
+ *
+ * The loader is generation-guarded: a fast toggle (or an unload) while the
+ * chunk is still in flight must not register the stale dataset.
+ */
+import { loadChunk } from './chunk-loader.ts'
+import type { BetterSidebarService } from './service.ts'
+
+/** The pref value selecting the built-in monochrome glyphs (default). */
+export const FILE_ICON_THEME_BUILTIN = 'builtin'
+/** The pref value selecting the optional colored brand-icon dataset. */
+export const FILE_ICON_THEME_COLORED = 'colored'
+
+/** A registrar exported by the lazy `file-icons` chunk. */
+type ColoredRegistrar = (service: BetterSidebarService) => () => void
+
+export interface FileIconThemeLoader {
+  /** Apply a pref value (unknown values behave as the built-in theme). */
+  set(theme: string): void
+  /** Drop any registration and stop reacting to in-flight chunk loads. */
+  dispose(): void
+}
+
+/**
+ * Bind `service` to the `fileIconTheme` pref. Call `set` on activation and on
+ * every prefs change; call `dispose` when the plugin unloads.
+ */
+export function createFileIconThemeLoader(service: BetterSidebarService): FileIconThemeLoader {
+  /** Disposer of the currently registered colored dataset, if any. */
+  let unregister: (() => void) | undefined
+  /** Bumped on every set/dispose: a load that lands on a stale generation is dropped. */
+  let generation = 0
+  /** The theme the pref currently asks for (repeated set() calls are no-ops). */
+  let current: string | undefined
+
+  const dropRegistrations = (): void => {
+    const dispose = unregister
+    unregister = undefined
+    if (dispose !== undefined) dispose()
+  }
+
+  const set = (theme: string): void => {
+    if (theme === current) return
+    current = theme
+    const generationAtSet = ++generation
+    if (theme !== FILE_ICON_THEME_COLORED) {
+      dropRegistrations()
+      return
+    }
+    loadChunk('file-icons').then((chunk) => {
+      if (generationAtSet !== generation) return
+      const register = chunk.registerColoredFileIcons as ColoredRegistrar | undefined
+      if (typeof register !== 'function') {
+        console.error('[dsh-better-sidebar] file-icons chunk exports no registerColoredFileIcons')
+        return
+      }
+      unregister = register(service)
+    }).catch((error: unknown) => {
+      if (generationAtSet !== generation) return
+      console.error('[dsh-better-sidebar] file-icons chunk failed to load:', error)
+    })
+  }
+
+  return {
+    set,
+    dispose: () => {
+      generation += 1
+      current = undefined
+      dropRegistrations()
+    },
+  }
+}
diff --git a/src/client/index.tsx b/src/client/index.tsx
index aed2ee8..cda9522 100644
--- a/src/client/index.tsx
+++ b/src/client/index.tsx
@@ -20,6 +20,7 @@ import { RenderBoundary } from './RenderBoundary.tsx'
 import { registerOpenPathInterception, registerTurnTailInterception } from './intercept.tsx'
 import { registerLinkInterception } from './link-intercept.ts'
 import { registerImeGuard } from './ime-guard.ts'
+import { createFileIconThemeLoader } from './file-icon-theme.ts'
 import { registerSettingsNavIcon } from './settings-nav-icon.ts'
 import { loadBootDecision } from './prefs.ts'
 import { SideCardSection } from './SideCardSection.tsx'
@@ -164,6 +165,21 @@ export function apply(ctx: Context): void {
     () => registerBuiltins(ctx, service, { terminalTitle: () => terminalTitle }),
     'dsh-better-sidebar: register built-in tabs and viewers',
   )
+  // Optional colored file-icon theme: the `fileIconTheme` pref decides whether
+  // the lazy `file-icons` chunk is fetched and its dataset registered through
+  // `registerFileIcon`. The loader reacts to prefs writes and is disposed with
+  // the fiber (HMR-safe); 'builtin' (the default) keeps the startup path free
+  // of icon data.
+  ctx.effect(() => {
+    const loader = createFileIconThemeLoader(service)
+    const sync = (): void => { loader.set(sidebarStore.getPrefs().fileIconTheme) }
+    sync()
+    const unsubscribe = service.subscribeState(sync)
+    return () => {
+      unsubscribe()
+      loader.dispose()
+    }
+  }, 'dsh-better-sidebar: colored file-icon theme')
   // A failure anywhere in the client lifecycle must never take the app down
   // silently: log with the plugin prefix and pin a visible diagnostic strip
   // to the page so a blank panel is never the only symptom. This strip is
diff --git a/src/client/locales-ar.ts b/src/client/locales-ar.ts
index 605f467..bde7200 100644
--- a/src/client/locales-ar.ts
+++ b/src/client/locales-ar.ts
@@ -267,6 +267,12 @@ export const ar: Record<string, string> = {
   settingsToolsDesc: 'عند التفعيل، يمكن للنموذج إنشاء وتشغيل طرفيات الشريط الجانبي عبر أدوات terminal_* الثمانية (معطّل افتراضياً)',
   settingsFenceTitle: 'فحص مسارات مساحة العمل',
   settingsFenceDesc: 'عند التفعيل، تصل وظائف الملفات في الشريط الجانبي إلى مسارات داخل مساحة عمل الجلسة فقط (الافتراضي)؛ عند الإيقاف تصبح ملفات المضيف كلها متاحة — وتحصل سكربتات الصفحة على النفاذ نفسه طوال ذلك',
+  settingsFileIconThemeTitle: 'أيقونات الملفات',
+  settingsFileIconThemeDesc: 'نمط الأيقونات لشجرة الملفات وتبويبات الملفات (تُحمَّل السمة الملوّنة عند الطلب، لا عند بدء التشغيل)',
+  settingsFileIconThemeBuiltin: 'مدمج (أحادي اللون)',
+  settingsFileIconThemeBuiltinDesc: 'أيقونات أحادية اللون تتبع رموز السمة، تغطي أنواع التعليمات البرمجية والمستندات والوسائط الشائعة',
+  settingsFileIconThemeColored: 'أيقونات العلامات الملوّنة',
+  settingsFileIconThemeColoredDesc: 'ألوان العلامات حسب النوع (مثل .tsx → React و package.json → npm)؛ تُحمَّل حزمة الأيقونات عند أول تفعيل',
   fenceErrorReason: 'هذا المسار خارج مساحة عمل الجلسة وقد حجبه الفحص',
   fenceDisableAction: 'إيقاف فحص مساحة العمل',
   settingsBottomTerminalTitle: 'فتح طرفية تلقائياً عند أول توسيع للوحة السفلية',
diff --git a/src/client/locales-de.ts b/src/client/locales-de.ts
index 0a3495c..94b6251 100644
--- a/src/client/locales-de.ts
+++ b/src/client/locales-de.ts
@@ -252,6 +252,12 @@ export const de: Record<string, string> = {
   settingsToolsDesc: 'Wenn aktiviert, kann das Modell über die 8 terminal_*-Werkzeuge Terminale in der Seitenleiste erstellen und steuern (standardmäßig deaktiviert)',
   settingsFenceTitle: 'Workspace-Pfadkontrolle',
   settingsFenceDesc: 'Wenn aktiv, erreichen die Dateifunktionen der Seitenleiste nur Pfade innerhalb des Session-Workspaces (Standard); ausgeschaltet sind Dateien überall auf dem Host erreichbar — Skripte der Seite erhalten solange dieselbe Reichweite',
+  settingsFileIconThemeTitle: 'Dateisymbole',
+  settingsFileIconThemeDesc: 'Symbolstil für Dateibaum und Datei-Tabs (das Farbthema lädt bei Bedarf, nie beim Start)',
+  settingsFileIconThemeBuiltin: 'Integriert (einfarbig)',
+  settingsFileIconThemeBuiltinDesc: 'Token-gesteuerte einfarbige Symbole für gängige Code-, Dokument- und Medientypen',
+  settingsFileIconThemeColored: 'Farbige Markensymbole',
+  settingsFileIconThemeColoredDesc: 'Markenfarben je Typ (z. B. .tsx → React, package.json → npm); das Icon-Paket lädt beim ersten Aktivieren',
   fenceErrorReason: 'Dieser Pfad liegt außerhalb des Session-Workspaces und wurde von der Workspace-Kontrolle blockiert',
   fenceDisableAction: 'Workspace-Kontrolle ausschalten',
   settingsBottomTerminalTitle: 'Beim ersten Ausklappen des unteren Panels automatisch ein Terminal öffnen',
diff --git a/src/client/locales-fr.ts b/src/client/locales-fr.ts
index 9e4c23c..25dd143 100644
--- a/src/client/locales-fr.ts
+++ b/src/client/locales-fr.ts
@@ -259,6 +259,12 @@ export const fr: Record<string, string> = {
   settingsToolsDesc: 'Une fois activé, le modèle peut créer et piloter des terminaux de la barre latérale via les 8 outils terminal_* (désactivé par défaut)',
   settingsFenceTitle: 'Contrôle des chemins de l\'espace de travail',
   settingsFenceDesc: 'Activé, les fonctions fichiers de la barre latérale n\'atteignent que les chemins dans l\'espace de travail de la session (par défaut) ; désactivé, les fichiers de tout l\'hôte deviennent accessibles — les scripts de la page obtiennent la même portée pendant ce temps',
+  settingsFileIconThemeTitle: 'Icônes de fichiers',
+  settingsFileIconThemeDesc: 'Style des icônes de l\'arborescence et des onglets de fichiers (le thème coloré se charge à la demande, jamais au démarrage)',
+  settingsFileIconThemeBuiltin: 'Intégré (monochrome)',
+  settingsFileIconThemeBuiltinDesc: 'Icônes monochromes pilotées par les jetons de thème, pour les types code / document / média courants',
+  settingsFileIconThemeColored: 'Icônes de marque colorées',
+  settingsFileIconThemeColoredDesc: 'Couleurs de marque par type (ex. .tsx → React, package.json → npm) ; le pack d\'icônes se charge à la première activation',
   fenceErrorReason: 'Ce chemin est hors de l\'espace de travail de la session et a été bloqué par le contrôle',
   fenceDisableAction: 'Désactiver le contrôle de l\'espace de travail',
   settingsBottomTerminalTitle: 'Ouvrir automatiquement un terminal au premier déploiement du panneau inférieur',
diff --git a/src/client/locales-hi.ts b/src/client/locales-hi.ts
index f78e1c7..9119a47 100644
--- a/src/client/locales-hi.ts
+++ b/src/client/locales-hi.ts
@@ -266,6 +266,12 @@ export const hi: Record<string, string> = {
   settingsToolsDesc: 'सक्षम होने पर, मॉडल 8 terminal_* टूल्स से साइडबार टर्मिनल बना और चला सकता है (डिफ़ॉल्ट रूप से बंद)',
   settingsFenceTitle: 'वर्कस्पेस पाथ जाँच',
   settingsFenceDesc: 'चालू होने पर साइडबार की फ़ाइल सुविधाएँ केवल सेशन वर्कस्पेस के भीतर के पाथ तक पहुँचती हैं (डिफ़ॉल्ट); बंद करने पर होस्ट की कोई भी फ़ाइल खोली जा सकती है — उस दौरान पेज के स्क्रिप्ट को भी वही पहुँच मिल जाती है',
+  settingsFileIconThemeTitle: 'फ़ाइल आइकन',
+  settingsFileIconThemeDesc: 'फ़ाइल ट्री और फ़ाइल टैब के आइकन की शैली (रंगीन थीम माँग पर लोड होती है, शुरू होते समय नहीं)',
+  settingsFileIconThemeBuiltin: 'अंतर्निहित (एकरंगी)',
+  settingsFileIconThemeBuiltinDesc: 'स्किन टोकन के अनुसार एकरंगी आइकन, सामान्य कोड / दस्तावेज़ / मीडिया प्रकारों के लिए',
+  settingsFileIconThemeColored: 'रंगीन ब्रांड आइकन',
+  settingsFileIconThemeColoredDesc: 'प्रकार के अनुसार ब्रांड रंग (जैसे .tsx → React, package.json → npm); पहली बार चालू करने पर आइकन पैक लोड होता है',
   fenceErrorReason: 'यह पाथ सेशन वर्कस्पेस के बाहर है और जाँच द्वारा अवरुद्ध किया गया',
   fenceDisableAction: 'वर्कस्पेस जाँच बंद करें',
   settingsBottomTerminalTitle: 'निचला पैनल पहली बार खुलने पर स्वतः टर्मिनल खोलें',
diff --git a/src/client/locales-id.ts b/src/client/locales-id.ts
index 33fc653..714a6db 100644
--- a/src/client/locales-id.ts
+++ b/src/client/locales-id.ts
@@ -264,6 +264,12 @@ export const id: Record<string, string> = {
   settingsToolsDesc: 'Saat diaktifkan, model dapat membuat dan mengendalikan terminal sidebar melalui 8 alat terminal_* (nonaktif secara default)',
   settingsFenceTitle: 'Pemeriksaan path workspace',
   settingsFenceDesc: 'Saat aktif, fitur berkas sidebar hanya menjangkau path di dalam workspace sesi (default); saat nonaktif, berkas di mana pun di host dapat diakses — skrip halaman memperoleh jangkauan yang sama selama itu',
+  settingsFileIconThemeTitle: 'Ikon berkas',
+  settingsFileIconThemeDesc: 'Gaya ikon untuk pohon berkas dan tab berkas (tema berwarna dimuat saat diperlukan, tidak saat mulai)',
+  settingsFileIconThemeBuiltin: 'Bawaan (monokrom)',
+  settingsFileIconThemeBuiltinDesc: 'Ikon monokrom mengikuti token tema, mencakup tipe kode / dokumen / media umum',
+  settingsFileIconThemeColored: 'Ikon merek berwarna',
+  settingsFileIconThemeColoredDesc: 'Warna merek per tipe (mis. .tsx → React, package.json → npm); paket ikon dimuat saat pertama diaktifkan',
   fenceErrorReason: 'Path ini berada di luar workspace sesi dan diblokir oleh pemeriksaan',
   fenceDisableAction: 'Matikan pemeriksaan workspace',
   settingsBottomTerminalTitle: 'Buka terminal otomatis saat panel bawah pertama kali dibentangkan',
diff --git a/src/client/locales-it.ts b/src/client/locales-it.ts
index f2629ce..98d65e1 100644
--- a/src/client/locales-it.ts
+++ b/src/client/locales-it.ts
@@ -257,6 +257,12 @@ export const it: Record<string, string> = {
   settingsToolsDesc: 'Se attivato, il modello può creare e gestire terminali della barra laterale attraverso gli 8 strumenti terminal_* (disattivato per impostazione predefinita)',
   settingsFenceTitle: 'Controllo dei percorsi del workspace',
   settingsFenceDesc: 'Attivo, le funzioni file della barra laterale raggiungono solo i percorsi nel workspace di sessione (predefinito); disattivo, ogni file dell\'host è raggiungibile — gli script della pagina ottengono la stessa portata nel frattempo',
+  settingsFileIconThemeTitle: 'Icone dei file',
+  settingsFileIconThemeDesc: 'Stile delle icone per l\'albero dei file e le schede (il tema colorato si carica su richiesta, mai all\'avvio)',
+  settingsFileIconThemeBuiltin: 'Integrato (monocromatico)',
+  settingsFileIconThemeBuiltinDesc: 'Icone monocromatiche basate sui token del tema, per i tipi di codice / documento / media più comuni',
+  settingsFileIconThemeColored: 'Icone di marca colorate',
+  settingsFileIconThemeColoredDesc: 'Colori di marca per tipo (es. .tsx → React, package.json → npm); il pacchetto si carica alla prima attivazione',
   fenceErrorReason: 'Questo percorso è fuori dal workspace di sessione ed è stato bloccato dal controllo',
   fenceDisableAction: 'Disattiva il controllo del workspace',
   settingsBottomTerminalTitle: 'Apri automaticamente un terminale alla prima espansione del pannello inferiore',
diff --git a/src/client/locales-ja.ts b/src/client/locales-ja.ts
index 7f91f50..5c4bb79 100644
--- a/src/client/locales-ja.ts
+++ b/src/client/locales-ja.ts
@@ -266,6 +266,12 @@ export const ja: Record<string, string> = {
   settingsToolsDesc: 'オンにすると、モデルが terminal_create 等 8 個のツールでサイドバーターミナルを作成・操作可能（デフォルトオフ）',
   settingsFenceTitle: 'ワークスペースパスガード',
   settingsFenceDesc: 'オンの場合、サイドバーのファイル機能はセッションワークスペース内のパスのみアクセス可能（デフォルト）。オフにするとホスト上の任意のファイルにアクセスできるが、オフの間はページ内スクリプトも同じ権限を得る',
+  settingsFileIconThemeTitle: 'ファイルアイコン',
+  settingsFileIconThemeDesc: 'ファイルツリーとファイルタブのアイコンスタイル（カラーテーマは必要時に読み込み、起動時には読み込みません）',
+  settingsFileIconThemeBuiltin: '標準（モノクロ）',
+  settingsFileIconThemeBuiltinDesc: 'スキントークンに従うモノクロアイコン。一般的なコード / ドキュメント / メディア形式に対応',
+  settingsFileIconThemeColored: 'カラーブランドアイコン',
+  settingsFileIconThemeColoredDesc: '種類ごとにブランドカラーで表示（例：.tsx → React、package.json → npm）。初回有効時にアイコンパックを読み込みます',
   fenceErrorReason: 'このパスはセッションワークスペースの外にあり、ワークスペースガードによりブロックされました',
   fenceDisableAction: 'ワークスペースガードをオフにする',
   settingsBottomTerminalTitle: '下パネル初回展開時に自動でターミナルを開く',
diff --git a/src/client/locales-ko.ts b/src/client/locales-ko.ts
index f27bf13..9123eec 100644
--- a/src/client/locales-ko.ts
+++ b/src/client/locales-ko.ts
@@ -258,6 +258,12 @@ export const ko: Record<string, string> = {
   settingsToolsDesc: '켜면 모델이 terminal_create 등 8개 도구로 사이드바 터미널을 만들고 조작할 수 있습니다(기본 꺼짐)',
   settingsFenceTitle: '워크스페이스 경로 검사',
   settingsFenceDesc: '켜면 사이드바의 파일 기능이 세션 워크스페이스 내 경로만 접근합니다(기본값). 끄면 호스트의 모든 파일에 접근할 수 있으며, 꺼져 있는 동안 페이지 내 스크립트도 동일한 권한을 얻습니다',
+  settingsFileIconThemeTitle: '파일 아이콘',
+  settingsFileIconThemeDesc: '파일 트리와 파일 탭의 아이콘 스타일 (컬러 테마는 필요할 때 로드되며 시작 시에는 로드되지 않습니다)',
+  settingsFileIconThemeBuiltin: '기본(단색)',
+  settingsFileIconThemeBuiltinDesc: '스킨 토큰을 따르는 단색 아이콘으로 주요 코드 / 문서 / 미디어 형식을 지원합니다',
+  settingsFileIconThemeColored: '컬러 브랜드 아이콘',
+  settingsFileIconThemeColoredDesc: '유형별 브랜드 색상 (예: .tsx → React, package.json → npm), 처음 켤 때 아이콘 팩을 로드합니다',
   fenceErrorReason: '이 경로는 세션 워크스페이스 밖에 있어 검사에 의해 차단되었습니다',
   fenceDisableAction: '워크스페이스 검사 끄기',
   settingsBottomTerminalTitle: '하단 패널을 처음 펼칠 때 터미널 자동 열기',
diff --git a/src/client/locales-nl.ts b/src/client/locales-nl.ts
index 96d976e..bf571ac 100644
--- a/src/client/locales-nl.ts
+++ b/src/client/locales-nl.ts
@@ -264,6 +264,12 @@ export const nl: Record<string, string> = {
   settingsToolsDesc: 'Indien ingeschakeld kan het model zijbalk-terminals aanmaken en besturen via de 8 terminal_*-tools (standaard uit)',
   settingsFenceTitle: 'Workspace-padcontrole',
   settingsFenceDesc: 'Aan: de bestandsfuncties van de zijbalk bereiken alleen paden binnen de sessie-workspace (standaard); uit: elk bestand op de host is bereikbaar — paginascripts krijgen dat bereik zolang het uit staat',
+  settingsFileIconThemeTitle: 'Bestandspictogrammen',
+  settingsFileIconThemeDesc: 'Pictogramstijl voor de bestandsboom en bestandstabbladen (het kleurenthema wordt op verzoek geladen, nooit bij het starten)',
+  settingsFileIconThemeBuiltin: 'Ingebouwd (monochroom)',
+  settingsFileIconThemeBuiltinDesc: 'Monochrome pictogrammen volgens de token-regels, voor gangbare code-, document- en mediatypen',
+  settingsFileIconThemeColored: 'Gekleurde merkpictogrammen',
+  settingsFileIconThemeColoredDesc: 'Merkkleuren per type (bijv. .tsx → React, package.json → npm); het pictogrammenpakket wordt geladen bij de eerste activering',
   fenceErrorReason: 'Dit pad ligt buiten de sessie-workspace en is geblokkeerd door de controle',
   fenceDisableAction: 'Workspace-controle uitzetten',
   settingsBottomTerminalTitle: 'Automatisch een terminal openen bij de eerste uitklap van het onderpaneel',
diff --git a/src/client/locales-pl.ts b/src/client/locales-pl.ts
index f9d5999..931a21c 100644
--- a/src/client/locales-pl.ts
+++ b/src/client/locales-pl.ts
@@ -268,6 +268,12 @@ export const pl: Record<string, string> = {
   settingsToolsDesc: 'Po włączeniu model może tworzyć i sterować terminalami panelu bocznego przez 8 narzędzi terminal_* (domyślnie wyłączone)',
   settingsFenceTitle: 'Kontrola ścieżek obszaru roboczego',
   settingsFenceDesc: 'Włączona: funkcje plików paska bocznego sięgają tylko ścieżek w obszarze roboczym sesji (domyślnie); wyłączona: dostępny jest dowolny plik hosta — skrypty strony zyskują ten sam zasięg przez ten czas',
+  settingsFileIconThemeTitle: 'Ikony plików',
+  settingsFileIconThemeDesc: 'Styl ikon drzewa plików i kart plików (kolorowy motyw wczytuje się na żądanie, nigdy przy starcie)',
+  settingsFileIconThemeBuiltin: 'Wbudowane (monochromatyczne)',
+  settingsFileIconThemeBuiltinDesc: 'Monochromatyczne ikony zgodne z tokenami motywu, dla typowych plików kodu / dokumentów / multimediów',
+  settingsFileIconThemeColored: 'Kolorowe ikony marek',
+  settingsFileIconThemeColoredDesc: 'Kolory marek według typu (np. .tsx → React, package.json → npm); paczka ikon wczytuje się przy pierwszym włączeniu',
   fenceErrorReason: 'Ta ścieżka jest poza obszarem roboczym sesji i została zablokowana przez kontrolę',
   fenceDisableAction: 'Wyłącz kontrolę obszaru roboczego',
   settingsBottomTerminalTitle: 'Automatycznie otwieraj terminal przy pierwszym rozwinięciu panelu dolnego',
diff --git a/src/client/locales-pt.ts b/src/client/locales-pt.ts
index 03e022a..e3a7ce0 100644
--- a/src/client/locales-pt.ts
+++ b/src/client/locales-pt.ts
@@ -249,6 +249,12 @@ export const pt: Record<string, string> = {
   settingsToolsDesc: 'Quando ativado, o modelo pode criar e operar terminais da barra lateral por meio das 8 ferramentas terminal_* (desativado por padrão)',
   settingsFenceTitle: 'Controle de caminhos do workspace',
   settingsFenceDesc: 'Ativado, os recursos de arquivos da barra lateral só alcançam caminhos dentro do workspace da sessão (padrão); desativado, arquivos de todo o host ficam acessíveis — scripts da página ganham o mesmo alcance enquanto isso',
+  settingsFileIconThemeTitle: 'Ícones de arquivo',
+  settingsFileIconThemeDesc: 'Estilo dos ícones da árvore de arquivos e das abas (o tema colorido é carregado sob demanda, nunca na inicialização)',
+  settingsFileIconThemeBuiltin: 'Integrado (monocromático)',
+  settingsFileIconThemeBuiltinDesc: 'Ícones monocromáticos guiados por tokens, para tipos comuns de código / documento / mídia',
+  settingsFileIconThemeColored: 'Ícones de marca coloridos',
+  settingsFileIconThemeColoredDesc: 'Cores de marca por tipo (ex.: .tsx → React, package.json → npm); o pacote é carregado ao ativar pela primeira vez',
   fenceErrorReason: 'Este caminho está fora do workspace da sessão e foi bloqueado pelo controle',
   fenceDisableAction: 'Desativar o controle do workspace',
   settingsBottomTerminalTitle: 'Abrir um terminal automaticamente na primeira expansão do painel inferior',
diff --git a/src/client/locales-ru.ts b/src/client/locales-ru.ts
index c75518c..9e0addc 100644
--- a/src/client/locales-ru.ts
+++ b/src/client/locales-ru.ts
@@ -263,6 +263,12 @@ export const ru: Record<string, string> = {
   settingsToolsDesc: 'Если включено, модель может через 8 инструментов (terminal_create и др.) создавать терминалы боковой панели и управлять ими (по умолчанию выключено)',
   settingsFenceTitle: 'Контроль путей рабочей области',
   settingsFenceDesc: 'Включено — файловые функции боковой панели достигают только путей внутри рабочей области сессии (по умолчанию); выключено — доступны любые файлы хоста, а скрипты страницы получают тот же доступ всё это время',
+  settingsFileIconThemeTitle: 'Значки файлов',
+  settingsFileIconThemeDesc: 'Стиль значков дерева файлов и вкладок (цветная тема загружается по требованию, а не при запуске)',
+  settingsFileIconThemeBuiltin: 'Встроенные (монохромные)',
+  settingsFileIconThemeBuiltinDesc: 'Монохромные значки на основе токенов темы: код, документы и медиа',
+  settingsFileIconThemeColored: 'Цветные значки брендов',
+  settingsFileIconThemeColoredDesc: 'Цвета брендов по типу (например, .tsx → React, package.json → npm); набор значков загружается при первом включении',
   fenceErrorReason: 'Этот путь вне рабочей области сессии и заблокирован контролем',
   fenceDisableAction: 'Отключить контроль рабочей области',
   settingsBottomTerminalTitle: 'Автооткрытие терминала при первом разворачивании нижней панели',
diff --git a/src/client/locales-sv.ts b/src/client/locales-sv.ts
index 5b08a7b..7873dbd 100644
--- a/src/client/locales-sv.ts
+++ b/src/client/locales-sv.ts
@@ -249,6 +249,12 @@ export const sv: Record<string, string> = {
   settingsToolsDesc: 'När aktiverat kan modellen skapa och styra sidopanelsterminaler via de 8 terminal_*-verktygen (av som standard)',
   settingsFenceTitle: 'Kontroll av workspace-sökvägar',
   settingsFenceDesc: 'På: sidopanelens filfunktioner når bara sökvägar i sessionens workspace (standard); av: vilken fil som helst på värden kan nås — sidans skript får samma räckvidd så länge',
+  settingsFileIconThemeTitle: 'Filikoner',
+  settingsFileIconThemeDesc: 'Ikonstil för filträdet och filflikarna (färgtemat laddas vid behov, aldrig vid start)',
+  settingsFileIconThemeBuiltin: 'Inbyggd (monokrom)',
+  settingsFileIconThemeBuiltinDesc: 'Monokroma ikoner som följer temats tokens, för vanliga kod-, dokument- och mediatyper',
+  settingsFileIconThemeColored: 'Färgade varumärkesikoner',
+  settingsFileIconThemeColoredDesc: 'Varumärkesfärger per typ (t.ex. .tsx → React, package.json → npm); ikonpaketet laddas första gången du aktiverar det',
   fenceErrorReason: 'Denna sökväg ligger utanför sessionens workspace och blockerades av kontrollen',
   fenceDisableAction: 'Stäng av workspace-kontrollen',
   settingsBottomTerminalTitle: 'Öppna automatiskt en terminal vid bottenpanelens första expandering',
diff --git a/src/client/locales-th.ts b/src/client/locales-th.ts
index 009ceac..30cbfd6 100644
--- a/src/client/locales-th.ts
+++ b/src/client/locales-th.ts
@@ -266,6 +266,12 @@ export const th: Record<string, string> = {
   settingsToolsDesc: 'เมื่อเปิดใช้ โมเดลสามารถสร้างและควบคุมเทอร์มินัลแถบด้านข้างผ่านเครื่องมือ terminal_* 8 ตัว (ปิดเป็นค่าเริ่มต้น)',
   settingsFenceTitle: 'การตรวจสอบเส้นทางเวิร์กสเปซ',
   settingsFenceDesc: 'เมื่อเปิด ฟีเจอร์ไฟล์ของแถบข้างเข้าถึงได้เฉพาะเส้นทางในเวิร์กสเปซของเซสชัน (ค่าเริ่มต้น) เมื่อปิด จะเข้าถึงไฟล์ใดก็ได้บนโฮสต์ — สคริปต์ในหน้าก็ได้ขอบเขตเดียวกันตลอดช่วงนั้น',
+  settingsFileIconThemeTitle: 'ไอคอนไฟล์',
+  settingsFileIconThemeDesc: 'สไตล์ไอคอนของแผนผังไฟล์และแท็บไฟล์ (ธีมสีจะโหลดเมื่อต้องการ ไม่โหลดตอนเริ่มต้น)',
+  settingsFileIconThemeBuiltin: 'ในตัว (สีเดียว)',
+  settingsFileIconThemeBuiltinDesc: 'ไอคอนสีเดียวตามโทเค็นธีม ครอบคลุมชนิดโค้ด / เอกสาร / สื่อทั่วไป',
+  settingsFileIconThemeColored: 'ไอคอนแบรนด์แบบมีสี',
+  settingsFileIconThemeColoredDesc: 'สีแบรนด์ตามชนิด (เช่น .tsx → React, package.json → npm) ชุดไอคอนจะโหลดเมื่อเปิดใช้ครั้งแรก',
   fenceErrorReason: 'เส้นทางนี้อยู่นอกเวิร์กสเปซของเซสชันและถูกบล็อกโดยการตรวจสอบ',
   fenceDisableAction: 'ปิดการตรวจสอบเวิร์กสเปซ',
   settingsBottomTerminalTitle: 'เปิดเทอร์มินัลอัตโนมัติเมื่อพาเนลล่างขยายครั้งแรก',
diff --git a/src/client/locales-tr.ts b/src/client/locales-tr.ts
index 633374a..c07e443 100644
--- a/src/client/locales-tr.ts
+++ b/src/client/locales-tr.ts
@@ -266,6 +266,12 @@ export const tr: Record<string, string> = {
   settingsToolsDesc: 'Etkinleştirildiğinde model, 8 terminal_* aracı üzerinden kenar çubuğu terminalleri oluşturup kullanabilir (varsayılan kapalı)',
   settingsFenceTitle: 'Çalışma alanı yol denetimi',
   settingsFenceDesc: 'Açıkken kenar çubuğunun dosya işlevleri yalnızca oturum çalışma alanındaki yollara erişir (varsayılan); kapatıldığında ana makinedeki her dosyaya erişilebilir — o süre boyunca sayfadaki betikler de aynı erişimi kazanır',
+  settingsFileIconThemeTitle: 'Dosya simgeleri',
+  settingsFileIconThemeDesc: 'Dosya ağacı ve dosya sekmeleri için simge stili (renkli tema isteğe bağlı yüklenir, başlangıçta değil)',
+  settingsFileIconThemeBuiltin: 'Yerleşik (tek renk)',
+  settingsFileIconThemeBuiltinDesc: 'Tema belirteçlerine uyan tek renk simgeler; yaygın kod / belge / medya türlerini kapsar',
+  settingsFileIconThemeColored: 'Renkli marka simgeleri',
+  settingsFileIconThemeColoredDesc: 'Türe göre marka renkleri (örn. .tsx → React, package.json → npm); simge paketi ilk açılışta yüklenir',
   fenceErrorReason: 'Bu yol oturum çalışma alanının dışında ve denetim tarafından engellendi',
   fenceDisableAction: 'Çalışma alanı denetimini kapat',
   settingsBottomTerminalTitle: 'Alt panelin ilk genişletilmesinde otomatik terminal aç',
diff --git a/src/client/locales-vi.ts b/src/client/locales-vi.ts
index 03df336..d05edd3 100644
--- a/src/client/locales-vi.ts
+++ b/src/client/locales-vi.ts
@@ -266,6 +266,12 @@ export const vi: Record<string, string> = {
   settingsToolsDesc: 'Khi bật, mô hình có thể tạo và điều khiển terminal thanh bên qua 8 công cụ terminal_* (mặc định tắt)',
   settingsFenceTitle: 'Kiểm tra đường dẫn workspace',
   settingsFenceDesc: 'Khi bật, các tính năng tệp của thanh bên chỉ truy cập đường dẫn trong workspace của phiên (mặc định); khi tắt, mọi tệp trên máy chủ đều có thể truy cập — script trong trang cũng có quyền tương ứng trong thời gian đó',
+  settingsFileIconThemeTitle: 'Biểu tượng tệp',
+  settingsFileIconThemeDesc: 'Kiểu biểu tượng cho cây tệp và tab tệp (chủ đề màu được tải khi cần, không tải lúc khởi động)',
+  settingsFileIconThemeBuiltin: 'Tích hợp (đơn sắc)',
+  settingsFileIconThemeBuiltinDesc: 'Biểu tượng đơn sắc theo token giao diện, bao phủ các loại mã / tài liệu / media phổ biến',
+  settingsFileIconThemeColored: 'Biểu tượng thương hiệu nhiều màu',
+  settingsFileIconThemeColoredDesc: 'Màu thương hiệu theo loại (ví dụ .tsx → React, package.json → npm); gói biểu tượng tải trong lần bật đầu tiên',
   fenceErrorReason: 'Đường dẫn này nằm ngoài workspace của phiên và đã bị chặn bởi kiểm tra',
   fenceDisableAction: 'Tắt kiểm tra workspace',
   settingsBottomTerminalTitle: 'Tự động mở terminal khi panel dưới mở rộng lần đầu',
diff --git a/src/client/locales-zh-HK.ts b/src/client/locales-zh-HK.ts
index ba55f2e..df6edd6 100644
--- a/src/client/locales-zh-HK.ts
+++ b/src/client/locales-zh-HK.ts
@@ -281,6 +281,12 @@ export const zhHK: Record<string, string> = {
   settingsToolsDesc: '開啟後，模型可透過 terminal_create 等 8 個工具建立並操作側邊欄終端（預設關閉）',
   settingsFenceTitle: '工作區路徑檢測',
   settingsFenceDesc: '開啟後，側欄的檔案功能僅能存取工作階段工作區內的路徑（預設）；關閉後可存取主機上任意檔案——關閉期間頁面內指令碼也將獲得同等存取能力',
+  settingsFileIconThemeTitle: '檔案圖示',
+  settingsFileIconThemeDesc: '檔案樹與檔案分頁的圖示風格（彩色主題按需載入，不影響啟動）',
+  settingsFileIconThemeBuiltin: '內建（單色）',
+  settingsFileIconThemeBuiltinDesc: '跟隨皮膚權杖的單色圖示，覆蓋常見程式碼 / 文件 / 媒體類型',
+  settingsFileIconThemeColored: '彩色品牌圖示',
+  settingsFileIconThemeColoredDesc: '按類型顯示品牌配色圖示（如 .tsx → React、package.json → npm）；首次開啟時載入圖示包',
   fenceErrorReason: '此路徑在工作階段工作區之外，已被工作區檢測攔截',
   fenceDisableAction: '關閉工作區檢測',
   settingsBottomTerminalTitle: '底部面板首次展開自動開終端',
diff --git a/src/client/locales-zh-MO.ts b/src/client/locales-zh-MO.ts
index 21de407..aabd7e0 100644
--- a/src/client/locales-zh-MO.ts
+++ b/src/client/locales-zh-MO.ts
@@ -281,6 +281,12 @@ export const zhMO: Record<string, string> = {
   settingsToolsDesc: '開啟後，模型可透過 terminal_create 等 8 個工具建立並操作側邊欄終端（預設關閉）',
   settingsFenceTitle: '工作區路徑檢測',
   settingsFenceDesc: '開啟後，側欄的檔案功能僅能存取工作階段工作區內的路徑（預設）；關閉後可存取主機上任意檔案——關閉期間頁面內指令碼也將獲得同等存取能力',
+  settingsFileIconThemeTitle: '檔案圖示',
+  settingsFileIconThemeDesc: '檔案樹與檔案分頁的圖示風格（彩色主題按需載入，不影響啟動）',
+  settingsFileIconThemeBuiltin: '內建（單色）',
+  settingsFileIconThemeBuiltinDesc: '跟隨皮膚權杖的單色圖示，覆蓋常見程式碼 / 文件 / 媒體類型',
+  settingsFileIconThemeColored: '彩色品牌圖示',
+  settingsFileIconThemeColoredDesc: '按類型顯示品牌配色圖示（如 .tsx → React、package.json → npm）；首次開啟時載入圖示包',
   fenceErrorReason: '此路徑在工作階段工作區之外，已被工作區檢測攔截',
   fenceDisableAction: '關閉工作區檢測',
   settingsBottomTerminalTitle: '底部面板首次展開自動開終端',
diff --git a/src/client/locales-zh-TW.ts b/src/client/locales-zh-TW.ts
index a1dfd60..af0526c 100644
--- a/src/client/locales-zh-TW.ts
+++ b/src/client/locales-zh-TW.ts
@@ -281,6 +281,12 @@ export const zhTW: Record<string, string> = {
   settingsToolsDesc: '開啟後，模型可透過 terminal_create 等 8 個工具建立並操作側邊欄終端（預設關閉）',
   settingsFenceTitle: '工作區路徑檢測',
   settingsFenceDesc: '開啟後，側欄的檔案功能僅能存取工作階段工作區內的路徑（預設）；關閉後可存取主機上任意檔案——關閉期間頁面內指令碼也將獲得同等存取能力',
+  settingsFileIconThemeTitle: '檔案圖示',
+  settingsFileIconThemeDesc: '檔案樹與檔案分頁的圖示風格（彩色主題按需載入，不影響啟動）',
+  settingsFileIconThemeBuiltin: '內建（單色）',
+  settingsFileIconThemeBuiltinDesc: '跟隨面板權杖的單色圖示，涵蓋常見程式碼 / 文件 / 媒體類型',
+  settingsFileIconThemeColored: '彩色品牌圖示',
+  settingsFileIconThemeColoredDesc: '依類型顯示品牌配色圖示（如 .tsx → React、package.json → npm）；首次開啟時載入圖示套件',
   fenceErrorReason: '此路徑在工作階段工作區之外，已被工作區檢測攔截',
   fenceDisableAction: '關閉工作區檢測',
   settingsBottomTerminalTitle: '底部面板首次展開自動開終端',
diff --git a/src/client/locales.ts b/src/client/locales.ts
index 07fca34..0d067ff 100644
--- a/src/client/locales.ts
+++ b/src/client/locales.ts
@@ -278,6 +278,12 @@ export const zh = {
   settingsToolsDesc: '开启后，模型可通过 terminal_create 等 8 个工具创建并操作侧边栏终端（默认关闭）',
   settingsFenceTitle: '工作区路径检测',
   settingsFenceDesc: '开启后，侧栏的文件功能仅能访问会话工作区内的路径（默认）；关闭后可访问主机上任意文件——关闭期间页面内脚本也将获得同等访问能力',
+  settingsFileIconThemeTitle: '文件图标',
+  settingsFileIconThemeDesc: '文件树与文件 tab 的图标风格（彩色主题按需加载，不影响启动）',
+  settingsFileIconThemeBuiltin: '内置（单色）',
+  settingsFileIconThemeBuiltinDesc: '跟随皮肤令牌的单色图标，覆盖常见代码 / 文档 / 媒体类型',
+  settingsFileIconThemeColored: '彩色品牌图标',
+  settingsFileIconThemeColoredDesc: '按类型显示品牌配色图标（如 .tsx → React、package.json → npm）；首次开启时加载图标包',
   fenceErrorReason: '此路径在会话工作区之外，已被工作区检测拦截',
   fenceDisableAction: '关闭工作区检测',
   settingsBottomTerminalTitle: '底部面板首次展开自动开终端',
@@ -727,6 +733,12 @@ export const en: Record<keyof typeof zh, string> = {
   settingsToolsDesc: 'When enabled, the model can create and drive sidebar terminals through the 8 terminal_* tools (off by default)',
   settingsFenceTitle: 'Workspace path fence',
   settingsFenceDesc: 'On, the sidebar\'s file features only reach paths inside the session workspace (default); off, any file on the host is reachable — page scripts gain the same reach while it is off',
+  settingsFileIconThemeTitle: 'File icons',
+  settingsFileIconThemeDesc: 'Icon style for the file tree and file tabs (the colored theme loads on demand, never at startup)',
+  settingsFileIconThemeBuiltin: 'Built-in (monochrome)',
+  settingsFileIconThemeBuiltinDesc: 'Token-driven monochrome glyphs covering common code / document / media types',
+  settingsFileIconThemeColored: 'Colored brand icons',
+  settingsFileIconThemeColoredDesc: 'Per-type brand colors (e.g. .tsx → React, package.json → npm); the icon pack loads the first time you enable it',
   fenceErrorReason: 'This path is outside the session workspace and was blocked by the workspace fence',
   fenceDisableAction: 'Turn off the workspace fence',
   settingsBottomTerminalTitle: 'Auto-open a terminal on the bottom panel\'s first expansion',
diff --git a/src/client/prefs.ts b/src/client/prefs.ts
index 082523a..1706489 100644
--- a/src/client/prefs.ts
+++ b/src/client/prefs.ts
@@ -88,6 +88,9 @@ export function parsePrefs(value: unknown): SidebarPrefs {
     workspaceFence: typeof record.workspaceFence === 'boolean'
       ? record.workspaceFence
       : SIDEBAR_PREFS_DEFAULTS.workspaceFence,
+    fileIconTheme: typeof record.fileIconTheme === 'string'
+      ? record.fileIconTheme
+      : SIDEBAR_PREFS_DEFAULTS.fileIconTheme,
     // The title-bar scheme (auto | web | preset | custom). The schema
     // declares the field WITHOUT a default, so documents written by older
     // plugin versions resolve without it — migrate from the legacy fields:
diff --git a/src/config.ts b/src/config.ts
index 3d055cb..2e5dcf9 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -128,6 +128,7 @@ export const PrefsSchema: z<SidebarPrefs> = z.object({
   editorExplorer: z.boolean().default(false),
   changesDiffFloat: z.boolean().default(true),
   workspaceFence: z.boolean().default(true),
+  fileIconTheme: z.string().default('builtin'),
   terminalShell: z.string().default(''),
   terminalShellArgs: z.string().default(''),
   titleBarScheme: z.union([z.const('auto'), z.const('web'), z.const('preset'), z.const('custom')]),
diff --git a/src/prefs-shared.ts b/src/prefs-shared.ts
index 9bc87fe..2bfec9c 100644
--- a/src/prefs-shared.ts
+++ b/src/prefs-shared.ts
@@ -102,6 +102,14 @@ export interface SidebarPrefs {
    * one-click global off + retry.
    */
   workspaceFence: boolean
+  /**
+   * The file-icon theme (v0.19.0+). `'builtin'` (default) is the monochrome
+   * VSCodicons glyph map every surface already uses; `'colored'` swaps in the
+   * optional brand-colored dataset, fetched from the lazy `file-icons` chunk
+   * only when selected (an unknown id behaves as `'builtin'`). The switch
+   * lives under the files tab's gear in the Side card settings.
+   */
+  fileIconTheme: string
   /**
    * The shell the UI and agent terminals spawn (absolute path or bare
    * executable name). Empty (default) keeps the legacy resolution order:
@@ -280,6 +288,7 @@ export const SIDEBAR_PREFS_DEFAULTS: SidebarPrefs = {
   editorExplorer: false,
   changesDiffFloat: true,
   workspaceFence: true,
+  fileIconTheme: 'builtin',
   terminalShell: '',
   terminalShellArgs: '',
   titleBarScheme: 'auto',
diff --git a/tests/builtins.spec.ts b/tests/builtins.spec.ts
index f14ca3f..363a7f0 100644
--- a/tests/builtins.spec.ts
+++ b/tests/builtins.spec.ts
@@ -110,7 +110,7 @@ describe('built-in tab registrations', () => {
   it('the editor tab declares its merged-mode (embedded file tree) setting', () => {
     const { service } = setup()
     const toggles = service.getTab('editor')?.settings?.toggles ?? []
-    expect(toggles.map(t => t.key)).toEqual(['editorExplorer', 'workspaceFence'])
+    expect(toggles.map(t => t.key)).toEqual(['editorExplorer', 'workspaceFence', 'fileIconTheme'])
     expect(toggles[0]?.title).toBeDefined()
     expect(toggles[0]?.desc).toBeDefined()
     // The merged mode is an iconed select (merged vs separate), not a switch.
diff --git a/tests/bundle-route.spec.ts b/tests/bundle-route.spec.ts
index 501585d..b27e9b2 100644
--- a/tests/bundle-route.spec.ts
+++ b/tests/bundle-route.spec.ts
@@ -150,6 +150,6 @@ describe('/sidebar/bundle route', () => {
   })
 
   it('exports the chunk allowlist (mirror of src/client/chunk-loader.ts)', () => {
-    expect([...CHUNK_NAMES]).toEqual(['terminal', 'editor', 'mermaid', 'locale'])
+    expect([...CHUNK_NAMES]).toEqual(['terminal', 'editor', 'mermaid', 'locale', 'file-icons'])
   })
 })
diff --git a/tests/file-icon-theme.spec.tsx b/tests/file-icon-theme.spec.tsx
new file mode 100644
index 0000000..bb743a4
--- /dev/null
+++ b/tests/file-icon-theme.spec.tsx
@@ -0,0 +1,176 @@
+/**
+ * The optional colored file-icon theme: the lazy-chunk loader that turns the
+ * `fileIconTheme` pref into a register/dispose of the colored dataset, and
+ * the dataset's own registration through the public `registerFileIcon` API.
+ *
+ * The loader tests drive a fake chunk (no fetch); the dataset tests use the
+ * real chunk module against a real service, asserting representative rules
+ * from each table (extension / exact file name / directory name).
+ */
+import { describe, it, expect, vi, afterEach } from 'vitest'
+import type { ReactElement, ReactNode } from 'react'
+import { SiNpm, SiReact } from 'react-icons/si'
+import { VscFolder, VscFolderOpened } from 'react-icons/vsc'
+
+// Mock browser globals (SidebarStore.reduce → schedulePersist uses window.setTimeout)
+const g = globalThis as Record<string, unknown>
+if (g.window === undefined) {
+  g.window = {
+    clearTimeout: () => {},
+    setTimeout: (_fn: () => void) => 0,
+    innerWidth: 1024,
+  }
+}
+if (g.localStorage === undefined) {
+  g.localStorage = { getItem: () => null, setItem: () => {} }
+}
+
+import { registerChunkForTests, resetChunks } from '../src/client/chunk-loader.ts'
+import { createBetterSidebarService } from '../src/client/service.ts'
+import { createSidebarStore } from '../src/client/state.ts'
+import {
+  createFileIconThemeLoader,
+  FILE_ICON_THEME_BUILTIN,
+  FILE_ICON_THEME_COLORED,
+} from '../src/client/file-icon-theme.ts'
+import { registerColoredFileIcons } from '../src/client/chunks/file-icons.tsx'
+
+/** The component type of a rendered icon element (identity of the glyph). */
+const glyphOf = (node: ReactNode): unknown => (node as ReactElement).type
+/** The inline color of a rendered icon element (undefined when untinted). */
+const colorOf = (node: ReactNode): unknown => (node as ReactElement).props.style?.color
+
+/** Flush the queued promise chain (loadChunk → loader's `.then`). */
+const settle = async (): Promise<void> => { await new Promise((resolve) => { setTimeout(resolve, 0) }) }
+
+afterEach(() => { resetChunks() })
+
+describe('file-icon theme loader (pref → lazy chunk → registerFileIcon)', () => {
+  it('registers the dataset when the colored theme is selected, and disposes on builtin', async () => {
+    const service = createBetterSidebarService(createSidebarStore())
+    let registrations = 0
+    let disposals = 0
+    registerChunkForTests('file-icons', async () => ({
+      registerColoredFileIcons: (target: typeof service) => {
+        expect(target).toBe(service)
+        registrations += 1
+        return () => { disposals += 1 }
+      },
+    }))
+    const loader = createFileIconThemeLoader(service)
+    expect(service.getFileIcons()).toHaveLength(0)
+    loader.set(FILE_ICON_THEME_COLORED)
+    await settle()
+    expect(registrations).toBe(1)
+    loader.set(FILE_ICON_THEME_BUILTIN)
+    expect(disposals).toBe(1)
+    loader.set(FILE_ICON_THEME_COLORED)
+    await settle()
+    expect(registrations).toBe(2)
+    loader.dispose()
+    expect(disposals).toBe(2)
+  })
+
+  it('treats an unknown pref value as the built-in theme', async () => {
+    const service = createBetterSidebarService(createSidebarStore())
+    let registrations = 0
+    registerChunkForTests('file-icons', async () => ({
+      registerColoredFileIcons: () => { registrations += 1; return () => {} },
+    }))
+    const loader = createFileIconThemeLoader(service)
+    loader.set('no-such-theme')
+    await settle()
+    expect(registrations).toBe(0)
+  })
+
+  it('drops a chunk load that lands after the pref moved back to builtin', async () => {
+    const service = createBetterSidebarService(createSidebarStore())
+    let registrations = 0
+    let release: (() => void) | undefined
+    registerChunkForTests('file-icons', () => new Promise((resolve) => {
+      release = () => resolve({ registerColoredFileIcons: () => { registrations += 1; return () => {} } })
+    }))
+    const loader = createFileIconThemeLoader(service)
+    loader.set(FILE_ICON_THEME_COLORED)
+    loader.set(FILE_ICON_THEME_BUILTIN)
+    release?.()
+    await settle()
+    expect(registrations).toBe(0)
+  })
+
+  it('does not re-register on a repeated set of the same value', async () => {
+    const service = createBetterSidebarService(createSidebarStore())
+    let registrations = 0
+    registerChunkForTests('file-icons', async () => ({
+      registerColoredFileIcons: () => { registrations += 1; return () => {} },
+    }))
+    const loader = createFileIconThemeLoader(service)
+    loader.set(FILE_ICON_THEME_COLORED)
+    loader.set(FILE_ICON_THEME_COLORED)
+    await settle()
+    expect(registrations).toBe(1)
+  })
+
+  it('logs and keeps the built-in glyphs when the chunk fails to load', async () => {
+    const service = createBetterSidebarService(createSidebarStore())
+    const errorSpy = vi.spyOn(console, 'error').mockImplementation(() => {})
+    try {
+      registerChunkForTests('file-icons', async () => { throw new Error('offline') })
+      const loader = createFileIconThemeLoader(service)
+      loader.set(FILE_ICON_THEME_COLORED)
+      await settle()
+      expect(errorSpy).toHaveBeenCalled()
+      expect(service.getFileIcons()).toHaveLength(0)
+    } finally {
+      errorSpy.mockRestore()
+    }
+  })
+
+  it('logs and keeps the built-in glyphs when the chunk exports no registrar', async () => {
+    const service = createBetterSidebarService(createSidebarStore())
+    const errorSpy = vi.spyOn(console, 'error').mockImplementation(() => {})
+    try {
+      registerChunkForTests('file-icons', async () => ({}))
+      const loader = createFileIconThemeLoader(service)
+      loader.set(FILE_ICON_THEME_COLORED)
+      await settle()
+      expect(errorSpy).toHaveBeenCalled()
+      expect(service.getFileIcons()).toHaveLength(0)
+    } finally {
+      errorSpy.mockRestore()
+    }
+  })
+})
+
+describe('colored dataset registration (563 rules through registerFileIcon)', () => {
+  it('registers the extension, file-name and directory rules and disposes them', () => {
+    const service = createBetterSidebarService(createSidebarStore())
+    const dispose = registerColoredFileIcons(service)
+    expect(service.getFileIcons().length).toBeGreaterThan(100)
+
+    // Extension rule: .tsx → React blue, and it outranks the built-in glyph.
+    const tsx = service.fileIcon('/w/App.tsx', 14)
+    expect(glyphOf(tsx)).toBe(SiReact)
+    expect(colorOf(tsx)).toBe('#61DAFB')
+
+    // Exact file name rule: package.json → npm red (name beats the .json ext).
+    const pkg = service.fileIcon('/w/package.json', 14)
+    expect(glyphOf(pkg)).toBe(SiNpm)
+    expect(colorOf(pkg)).toBe('#CB3837')
+
+    // Directory rule: node_modules is tinted, an unnamed dir keeps the glyph.
+    const nodeModules = service.folderIcon('/w/node_modules', false, 14)
+    expect(glyphOf(nodeModules)).toBe(VscFolder)
+    expect(colorOf(nodeModules)).toBe('#CB3837')
+    expect(glyphOf(service.folderIcon('/w/node_modules', true, 14))).toBe(VscFolderOpened)
+    expect(glyphOf(service.folderIcon('/w/zzz-unnamed-dir', false, 14))).toBe(VscFolder)
+    expect(colorOf(service.folderIcon('/w/zzz-unnamed-dir', false, 14))).toBeUndefined()
+
+    // An extension the dataset does not cover still falls back to the built-in.
+    expect(glyphOf(service.fileIcon('/w/data.unknownext', 14))).toBeDefined()
+
+    dispose()
+    expect(service.getFileIcons()).toHaveLength(0)
+    expect(colorOf(service.fileIcon('/w/App.tsx', 14))).toBeUndefined()
+  })
+})
diff --git a/tests/manifest-consistency.spec.ts b/tests/manifest-consistency.spec.ts
index 04ba007..4d691b1 100644
--- a/tests/manifest-consistency.spec.ts
+++ b/tests/manifest-consistency.spec.ts
@@ -71,7 +71,7 @@ function bundleId(file: string): string {
 }
 
 /** The lazy chunk bundle names (mirror of src/bundle-route.ts CHUNK_NAMES). */
-const CHUNK_FILES = ['terminal', 'editor', 'mermaid'].map(name => `lib/client-${name}.js`)
+const CHUNK_FILES = ['terminal', 'editor', 'mermaid', 'file-icons'].map(name => `lib/client-${name}.js`)
 
 /** The global registry slot a built chunk script assigns (its factory key). */
 function chunkSlot(file: string): string {
diff --git a/tests/plugin-shape.spec.ts b/tests/plugin-shape.spec.ts
index ffe16fc..c2786ed 100644
--- a/tests/plugin-shape.spec.ts
+++ b/tests/plugin-shape.spec.ts
@@ -97,6 +97,6 @@ describe('dsh-better-sidebar plugin export shape', () => {
     const overridden = (PrefsSchema as unknown as {
       (input: Record<string, unknown> | undefined): Record<string, unknown>
     })({ openByDefault: false, defaultWidthPercent: 45 })
-    expect(overridden).toEqual({ openByDefault: false, defaultWidthPercent: 45, autoOpenSubagent: true, autoOpenJobs: true, agentTerminalTools: false, agentOpenTools: false, bottomPanelAutoTerminal: true, terminalFontFamily: '', terminalFontSize: 13, interceptOpenPath: true, editorExplorer: false, workspaceFence: true, terminalShell: '', terminalShellArgs: '', titleBarCompat: false, titleBarStripPx: 40, htmlViewerNoSandbox: false, htmlViewerDefaultUnsafe: false, browserNoSandbox: false, browserInterceptLinks: true, browserInterceptHttp: true, browserInterceptHttps: false, browserAllowedLoopback: '', changesDiffFloat: true, tabsEnabled: {}, viewersEnabled: {}, pluginSettings: {} })
+    expect(overridden).toEqual({ openByDefault: false, defaultWidthPercent: 45, autoOpenSubagent: true, autoOpenJobs: true, agentTerminalTools: false, agentOpenTools: false, bottomPanelAutoTerminal: true, terminalFontFamily: '', terminalFontSize: 13, interceptOpenPath: true, editorExplorer: false, workspaceFence: true, fileIconTheme: 'builtin', terminalShell: '', terminalShellArgs: '', titleBarCompat: false, titleBarStripPx: 40, htmlViewerNoSandbox: false, htmlViewerDefaultUnsafe: false, browserNoSandbox: false, browserInterceptLinks: true, browserInterceptHttp: true, browserInterceptHttps: false, browserAllowedLoopback: '', changesDiffFloat: true, tabsEnabled: {}, viewersEnabled: {}, pluginSettings: {} })
   })
 })
diff --git a/tests/prefs.spec.ts b/tests/prefs.spec.ts
index 1415c01..fdc0c92 100644
--- a/tests/prefs.spec.ts
+++ b/tests/prefs.spec.ts
@@ -44,6 +44,7 @@ describe('side card preferences', () => {
         interceptOpenPath: true,
         editorExplorer: false, changesDiffFloat: true,
         workspaceFence: true,
+        fileIconTheme: 'builtin',
         terminalShell: '',
         terminalShellArgs: '',
         titleBarScheme: 'auto',
@@ -78,6 +79,7 @@ describe('side card preferences', () => {
         interceptOpenPath: true,
         editorExplorer: false, changesDiffFloat: true,
         workspaceFence: true,
+        fileIconTheme: 'builtin',
         terminalShell: '',
         terminalShellArgs: '',
         titleBarScheme: 'auto',
@@ -112,6 +114,7 @@ describe('side card preferences', () => {
         interceptOpenPath: true,
         editorExplorer: false, changesDiffFloat: true,
         workspaceFence: true,
+        fileIconTheme: 'builtin',
         terminalShell: '',
         terminalShellArgs: '',
         titleBarScheme: 'auto',
@@ -182,6 +185,16 @@ describe('side card preferences', () => {
     expect((await loadPrefs(wire({ workspaceFence: false }))).workspaceFence).toBe(false)
   })
 
+  it('defaults fileIconTheme to builtin; only a stored string survives', async () => {
+    // The colored theme is opt-in: absent or malformed keeps the monochrome
+    // built-in glyphs (and never fetches the icon chunk).
+    expect((await loadPrefs(wire({}))).fileIconTheme).toBe('builtin')
+    expect((await loadPrefs(wire({ fileIconTheme: 7 }))).fileIconTheme).toBe('builtin')
+    expect((await loadPrefs(wire({ fileIconTheme: 'colored' }))).fileIconTheme).toBe('colored')
+    // An unknown id is preserved here and treated as builtin by the loader.
+    expect((await loadPrefs(wire({ fileIconTheme: 'ghost' }))).fileIconTheme).toBe('ghost')
+  })
+
   it('defaults the title-bar scheme to the conservative auto with no preset or custom CSS', async () => {
     // Absent or malformed → auto (plain web keeps the untouched layout).
     expect((await loadPrefs(wire({}))).titleBarScheme).toBe('auto')
@@ -282,9 +295,9 @@ describe('side card preferences', () => {
     const store = createSidebarStore()
     // Node environment: no window → the width falls back to PANEL_DEFAULT,
     // while the open flag still follows the preference.
-    store.setPrefs({ openByDefault: false, defaultWidthPercent: 45, autoOpenSubagent: true, autoOpenJobs: true, agentTerminalTools: false, agentOpenTools: false, bottomPanelAutoTerminal: true, terminalFontFamily: '', terminalFontSize: 13, interceptOpenPath: true, editorExplorer: true, changesDiffFloat: true, workspaceFence: true, terminalShell: '', terminalShellArgs: '', titleBarScheme: 'auto', titleBarPresetId: '', customCss: '', titleBarCompat: false, titleBarStripPx: 40, htmlViewerNoSandbox: false, htmlViewerDefaultUnsafe: false, browserNoSandbox: false, browserInterceptLinks: true, browserInterceptHttp: true, browserInterceptHttps: false, browserAllowedLoopback: "", tabsEnabled: {}, viewersEnabled: {}, pluginSettings: {} })
+    store.setPrefs({ openByDefault: false, defaultWidthPercent: 45, autoOpenSubagent: true, autoOpenJobs: true, agentTerminalTools: false, agentOpenTools: false, bottomPanelAutoTerminal: true, terminalFontFamily: '', terminalFontSize: 13, interceptOpenPath: true, editorExplorer: true, changesDiffFloat: true, workspaceFence: true, fileIconTheme: 'builtin', terminalShell: '', terminalShellArgs: '', titleBarScheme: 'auto', titleBarPresetId: '', customCss: '', titleBarCompat: false, titleBarStripPx: 40, htmlViewerNoSandbox: false, htmlViewerDefaultUnsafe: false, browserNoSandbox: false, browserInterceptLinks: true, browserInterceptHttp: true, browserInterceptHttps: false, browserAllowedLoopback: "", tabsEnabled: {}, viewersEnabled: {}, pluginSettings: {} })
     store.setSession('fresh-session')
-    expect(store.getPrefs()).toEqual({ openByDefault: false, defaultWidthPercent: 45, autoOpenSubagent: true, autoOpenJobs: true, agentTerminalTools: false, agentOpenTools: false, bottomPanelAutoTerminal: true, terminalFontFamily: '', terminalFontSize: 13, interceptOpenPath: true, editorExplorer: true, changesDiffFloat: true, workspaceFence: true, terminalShell: '', terminalShellArgs: '', titleBarScheme: 'auto', titleBarPresetId: '', customCss: '', titleBarCompat: false, titleBarStripPx: 40, htmlViewerNoSandbox: false, htmlViewerDefaultUnsafe: false, browserNoSandbox: false, browserInterceptLinks: true, browserInterceptHttp: true, browserInterceptHttps: false, browserAllowedLoopback: "", tabsEnabled: {}, viewersEnabled: {}, pluginSettings: {} })
+    expect(store.getPrefs()).toEqual({ openByDefault: false, defaultWidthPercent: 45, autoOpenSubagent: true, autoOpenJobs: true, agentTerminalTools: false, agentOpenTools: false, bottomPanelAutoTerminal: true, terminalFontFamily: '', terminalFontSize: 13, interceptOpenPath: true, editorExplorer: true, changesDiffFloat: true, workspaceFence: true, fileIconTheme: 'builtin', terminalShell: '', terminalShellArgs: '', titleBarScheme: 'auto', titleBarPresetId: '', customCss: '', titleBarCompat: false, titleBarStripPx: 40, htmlViewerNoSandbox: false, htmlViewerDefaultUnsafe: false, browserNoSandbox: false, browserInterceptLinks: true, browserInterceptHttp: true, browserInterceptHttps: false, browserAllowedLoopback: "", tabsEnabled: {}, viewersEnabled: {}, pluginSettings: {} })
     const snapshot = store.getSnapshot()
     expect(snapshot.sessionId).toBe('fresh-session')
     expect(snapshot.state?.panelOpen).toBe(false)
@@ -320,7 +333,7 @@ describe('side card preferences', () => {
 
   it('skips the default seed tab when the editor (files window) type is disabled', () => {
     const store = createSidebarStore()
-    store.setPrefs({ openByDefault: true, defaultWidthPercent: 30, autoOpenSubagent: true, autoOpenJobs: true, agentTerminalTools: false, agentOpenTools: false, bottomPanelAutoTerminal: true, terminalFontFamily: '', terminalFontSize: 13, interceptOpenPath: true, editorExplorer: true, changesDiffFloat: true, workspaceFence: true, terminalShell: '', terminalShellArgs: '', titleBarScheme: 'auto', titleBarPresetId: '', customCss: '', titleBarCompat: false, titleBarStripPx: 40, htmlViewerNoSandbox: false, htmlViewerDefaultUnsafe: false, browserNoSandbox: false, browserInterceptLinks: true, browserInterceptHttp: true, browserInterceptHttps: false, browserAllowedLoopback: "", tabsEnabled: { editor: false }, viewersEnabled: {}, pluginSettings: {} })
+    store.setPrefs({ openByDefault: true, defaultWidthPercent: 30, autoOpenSubagent: true, autoOpenJobs: true, agentTerminalTools: false, agentOpenTools: false, bottomPanelAutoTerminal: true, terminalFontFamily: '', terminalFontSize: 13, interceptOpenPath: true, editorExplorer: true, changesDiffFloat: true, workspaceFence: true, fileIconTheme: 'builtin', terminalShell: '', terminalShellArgs: '', titleBarScheme: 'auto', titleBarPresetId: '', customCss: '', titleBarCompat: false, titleBarStripPx: 40, htmlViewerNoSandbox: false, htmlViewerDefaultUnsafe: false, browserNoSandbox: false, browserInterceptLinks: true, browserInterceptHttp: true, browserInterceptHttps: false, browserAllowedLoopback: "", tabsEnabled: { editor: false }, viewersEnabled: {}, pluginSettings: {} })
     store.setSession('no-editor')
     const state = store.getSnapshot().state!
     const tabs = allLeaves(state.splits).flatMap(leaf => leaf.tabs)
@@ -330,7 +343,7 @@ describe('side card preferences', () => {
     // editorExplorer modes.
     for (const editorExplorer of [true, false]) {
       const openStore = createSidebarStore()
-      openStore.setPrefs({ openByDefault: true, defaultWidthPercent: 30, autoOpenSubagent: true, autoOpenJobs: true, agentTerminalTools: false, agentOpenTools: false, bottomPanelAutoTerminal: true, terminalFontFamily: '', terminalFontSize: 13, interceptOpenPath: true, editorExplorer, changesDiffFloat: true, workspaceFence: true, terminalShell: '', terminalShellArgs: '', titleBarScheme: 'auto', titleBarPresetId: '', customCss: '', titleBarCompat: false, titleBarStripPx: 40, htmlViewerNoSandbox: false, htmlViewerDefaultUnsafe: false, browserNoSandbox: false, browserInterceptLinks: true, browserInterceptHttp: true, browserInterceptHttps: false, browserAllowedLoopback: "", tabsEnabled: {}, viewersEnabled: {}, pluginSettings: {} })
+      openStore.setPrefs({ openByDefault: true, defaultWidthPercent: 30, autoOpenSubagent: true, autoOpenJobs: true, agentTerminalTools: false, agentOpenTools: false, bottomPanelAutoTerminal: true, terminalFontFamily: '', terminalFontSize: 13, interceptOpenPath: true, editorExplorer, changesDiffFloat: true, workspaceFence: true, fileIconTheme: 'builtin', terminalShell: '', terminalShellArgs: '', titleBarScheme: 'auto', titleBarPresetId: '', customCss: '', titleBarCompat: false, titleBarStripPx: 40, htmlViewerNoSandbox: false, htmlViewerDefaultUnsafe: false, browserNoSandbox: false, browserInterceptLinks: true, browserInterceptHttp: true, browserInterceptHttps: false, browserAllowedLoopback: "", tabsEnabled: {}, viewersEnabled: {}, pluginSettings: {} })
       openStore.setSession(`with-editor-${editorExplorer}`)
       const openTabs = allLeaves(openStore.getSnapshot().state!.splits).flatMap(leaf => leaf.tabs)
       expect(openTabs.map(tab => tab.type)).toEqual(['editor'])
@@ -340,7 +353,7 @@ describe('side card preferences', () => {
   it('seeds the empty editor home tab (files window) in both editorExplorer modes', () => {
     for (const editorExplorer of [true, false]) {
       const store = createSidebarStore()
-      store.setPrefs({ openByDefault: true, defaultWidthPercent: 30, autoOpenSubagent: true, autoOpenJobs: true, agentTerminalTools: false, agentOpenTools: false, bottomPanelAutoTerminal: true, terminalFontFamily: '', terminalFontSize: 13, interceptOpenPath: true, editorExplorer, changesDiffFloat: true, workspaceFence: true, terminalShell: '', terminalShellArgs: '', titleBarScheme: 'auto', titleBarPresetId: '', customCss: '', titleBarCompat: false, titleBarStripPx: 40, htmlViewerNoSandbox: false, htmlViewerDefaultUnsafe: false, browserNoSandbox: false, browserInterceptLinks: true, browserInterceptHttp: true, browserInterceptHttps: false, browserAllowedLoopback: "", tabsEnabled: {}, viewersEnabled: {}, pluginSettings: {} })
+      store.setPrefs({ openByDefault: true, defaultWidthPercent: 30, autoOpenSubagent: true, autoOpenJobs: true, agentTerminalTools: false, agentOpenTools: false, bottomPanelAutoTerminal: true, terminalFontFamily: '', terminalFontSize: 13, interceptOpenPath: true, editorExplorer, changesDiffFloat: true, workspaceFence: true, fileIconTheme: 'builtin', terminalShell: '', terminalShellArgs: '', titleBarScheme: 'auto', titleBarPresetId: '', customCss: '', titleBarCompat: false, titleBarStripPx: 40, htmlViewerNoSandbox: false, htmlViewerDefaultUnsafe: false, browserNoSandbox: false, browserInterceptLinks: true, browserInterceptHttp: true, browserInterceptHttps: false, browserAllowedLoopback: "", tabsEnabled: {}, viewersEnabled: {}, pluginSettings: {} })
       store.setSession(`fresh-${editorExplorer}`)
       const tabs = allLeaves(store.getSnapshot().state!.splits).flatMap(leaf => leaf.tabs)
       expect(tabs).toHaveLength(1)
diff --git a/tests/smoke.spec.ts b/tests/smoke.spec.ts
index 99a834d..22025d8 100644
--- a/tests/smoke.spec.ts
+++ b/tests/smoke.spec.ts
@@ -950,6 +950,7 @@ describe('side card settings routes', () => {
         interceptOpenPath: true,
         editorExplorer: false,
         workspaceFence: true,
+        fileIconTheme: 'builtin',
         terminalShell: '',
         terminalShellArgs: '',
         titleBarCompat: false,
diff --git a/tests/theme.spec.ts b/tests/theme.spec.ts
index 0552779..330db57 100644
--- a/tests/theme.spec.ts
+++ b/tests/theme.spec.ts
@@ -13,6 +13,8 @@
  */
 // @vitest-environment jsdom
 import { afterEach, describe, expect, it } from 'vitest'
+import { readFileSync, readdirSync } from 'node:fs'
+import { resolve } from 'node:path'
 import { colorAlpha, effectiveTokenValue, tokenValue } from '../src/client/theme.ts'
 
 afterEach(() => {
@@ -80,3 +82,39 @@ describe('effectiveTokenValue', () => {
     expect(effectiveTokenValue('--probe')).toBe('')
   })
 })
+
+/**
+ * Skin contract (guide §12): every visual value rides a `--dsw-alias-*` /
+ * `--dsw-font-*` / `--ds-*` token. The ONE documented exception is the
+ * optional colored icon theme: brand colors are identity, not chrome, so
+ * they are hardcoded — but only inside the lazy `file-icons` chunk, which
+ * the core bundle must never import. This guards that boundary.
+ */
+// jsdom has no file:// import.meta.url; vitest runs from the repo root.
+const ROOT = process.cwd()
+
+describe('skin contract boundary for hardcoded icon colors', () => {
+  const coreIconModules = ['src/client/file-icons.tsx', 'src/client/file-icon-theme.ts']
+
+  it('the core icon modules carry no color literals', () => {
+    for (const file of coreIconModules) {
+      const source = readFileSync(resolve(ROOT, file), 'utf8')
+      expect(source, file).not.toMatch(/#[0-9a-fA-F]{3,8}\b/)
+      expect(source, file).not.toMatch(/\brgba?\(/)
+    }
+  })
+
+  it('only the lazy chunk may carry the colored dataset, and the core never imports it statically', () => {
+    const chunk = readFileSync(resolve(ROOT, 'src/client/chunks/file-icons.tsx'), 'utf8')
+    expect(chunk).toMatch(/#[0-9a-fA-F]{6}/)
+    const clientDir = resolve(ROOT, 'src/client')
+    const offenders: string[] = []
+    for (const entry of readdirSync(clientDir, { recursive: true, withFileTypes: true })) {
+      if (!entry.isFile() || !/\.tsx?$/.test(entry.name)) continue
+      const path = resolve(entry.parentPath, entry.name)
+      if (path.includes('/chunks/')) continue
+      if (/from '[^']*chunks\/file-icons/.test(readFileSync(path, 'utf8'))) offenders.push(path)
+    }
+    expect(offenders).toEqual([])
+  })
+})
diff --git a/tsdown.config.ts b/tsdown.config.ts
index 881a45d..9c80b5e 100644
--- a/tsdown.config.ts
+++ b/tsdown.config.ts
@@ -211,6 +211,11 @@ function chunkBundle(name: string): UserConfig {
     inputOptions: {
       resolve: {
         conditionNames: ['browser', 'import', 'require', 'default'],
+        // The icon chunks import a handful of glyphs from the two react-icons
+        // packs; without this alias the pack's unshakeable CJS entry pulls in
+        // the whole set (6.4 MB for the file-icons chunk). Same reason the
+        // core bundle pins it.
+        ...(name === 'file-icons' ? { alias: REACT_ICONS_ESM_ALIAS } : {}),
       },
     },
     noExternal: (id: string) => (CLIENT_EXTERNALS.includes(id) ? undefined : true),
@@ -324,7 +329,7 @@ function makeCssPlugin(pluginId: string): BuildPlugin {
 }
 
 /** The lazy chunk names (keep in sync with src/bundle-route.ts CHUNK_NAMES). */
-const CHUNKS = ['terminal', 'editor', 'mermaid', 'locale']
+const CHUNKS = ['terminal', 'editor', 'mermaid', 'locale', 'file-icons']
 
 export default [
   {