feat(settings): show categorized storage usage on demand

README.md

@@ -42,7 +42,7 @@ docker run -d --name rawmark \
 - 请通过 HTTPS 反向代理（Caddy、Nginx 等）访问，并转发 WebSocket（`/api/v1/events`）。
 - 多选与导出：Ctrl/Cmd 点击切换选择，Shift 点击选择可见范围；右键批量删除、移动或导出 Markdown。单篇无附件直接下载 `.md`，其他情况下载包含 Markdown 与本地附件的 ZIP；重名目标不会被覆盖，批量操作会汇报单项失败。
 - 设置：桌面使用居中窗口，手机使用分类与内容两级布局；支持搜索设置并定位、常用排版项单独重置，自动保存状态与失败提示可见。外观与编辑器分别管理，安装入口位于「关于」。
-- 回收站：回收站支持清空全部；默认按原删除时间保留 30 天，0 表示永不自动删除，服务启动及每小时执行清理，修改期限同样影响已有条目。
+- 回收站与存储：回收站支持清空全部；默认按原删除时间保留 30 天，0 表示永不自动删除，服务启动及每小时执行清理，修改期限同样影响已有条目。设置「应用 → 存储空间」按需统计数据目录与外置笔记库，不跟随内部符号链接；附件与回收站包含在笔记库总量中。
 - 快捷键：支持按命令名称、ID 或组合键搜索，添加、逐条移除和单项/全部重置，并拒绝冲突绑定。默认跟随 [Typora](https://support.typora.io/Shortcut-Keys/) 的 Windows/Linux 或 macOS 组合，无对应项和插件默认留空；浏览器保留键可自行重新绑定。Ctrl/Cmd+1～6 设置标题，同级再次触发恢复正文；字号可直接输入，编辑器字号随有效输入即时生效。
 - 文件目录操作：右键「文件目录」标题或目录空白处，可搜索、打开标签索引、新建笔记、新建目录、导入文档及管理图片；也可点击标题打开菜单。文件夹右键操作以所选文件夹为目标。
 - 导入：文件目录或文件夹右键菜单选择「导入」，支持多选 UTF-8 `.md` 文件或单个 ZIP（总上传上限 100 MB）。ZIP 新建同名文件夹并保留笔记层级，本地图片归入各笔记同级 `assets/`；全部改链后移除已迁移且无引用的重复原图，其他附件和未使用图片保留。同名不同内容不覆盖，缺失的本地链接会提示，外部图片不会自动下载。

cmd/rawmark/main.go

@@ -81,6 +81,7 @@ func run(addr string) error {
 	go cleanupSessions(ctx, st)
 
 	srv := api.New(v, am, st, hub, idx)
+	srv.DataDir = dataDir
 	srv.ThemesDir = filepath.Join(dataDir, "themes")
 	srv.PluginsDir = filepath.Join(dataDir, "plugins")
 	srv.FontsDir = filepath.Join(dataDir, "fonts")

internal/api/api.go

@@ -38,6 +38,7 @@ type Server struct {
 	// 串行化设置的"读取-合并-写入"
 	settingsMu sync.Mutex
 	// ThemesDir 指向数据目录中的主题目录；为空时只有内置主题。
+	DataDir    string
 	ThemesDir  string
 	PluginsDir string
 	FontsDir   string
@@ -93,6 +94,7 @@ func (s *Server) routes() []route {
 		{"GET /api/v1/raw/{path...}", authed, s.raw},
 		{"GET /api/v1/trash", authed, s.trashList},
 		{"DELETE /api/v1/trash", authed, s.trashClear},
+		{"GET /api/v1/storage", sessionOnly, s.getStorage},
 		{"POST /api/v1/trash/{id}/restore", authed, s.trashRestore},
 		{"DELETE /api/v1/trash/{id}", authed, s.trashPurge},
 		{"GET /api/v1/events", authed, s.events},

internal/api/api_test.go

@@ -128,6 +128,7 @@ func newFixture(t *testing.T) *fixture {
 	t.Cleanup(func() { idx.Close() })
 	hub := events.NewHub()
 	server := New(v, am, st, hub, idx)
+	server.DataDir = dir
 	server.ThemesDir = filepath.Join(dir, "themes")
 	server.PluginsDir = filepath.Join(dir, "plugins")
 	server.FontsDir = filepath.Join(dir, "fonts")

internal/api/openapi.json

@@ -2185,6 +2185,38 @@
           }
         }
       }
+    },
+    "/storage": {
+      "get": {
+        "summary": "按需统计存储空间",
+        "description": "只接受登录会话。统计数据目录和实际笔记库的普通文件字节，嵌套去重，不跟随内部符号链接；附件/回收站是笔记库的子项，totalSize不重复累加。calculatedAt为统计完成时间（Unix毫秒）。扫描失败返回错误，不返回部分结果。",
+        "tags": [
+          "设置"
+        ],
+        "security": [
+          {
+            "cookie": []
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "统计结果",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/StorageUsage"
+                }
+              }
+            }
+          },
+          "403": {
+            "description": "只接受登录会话"
+          },
+          "500": {
+            "description": "扫描失败"
+          }
+        }
+      }
     }
   },
   "components": {
@@ -2429,6 +2461,61 @@
             }
           }
         }
+      },
+      "StorageUsage": {
+        "type": "object",
+        "required": [
+          "totalSize",
+          "categories",
+          "assetsSize",
+          "trashSize",
+          "calculatedAt"
+        ],
+        "properties": {
+          "totalSize": {
+            "type": "integer",
+            "minimum": 0
+          },
+          "assetsSize": {
+            "type": "integer",
+            "minimum": 0
+          },
+          "trashSize": {
+            "type": "integer",
+            "minimum": 0
+          },
+          "calculatedAt": {
+            "type": "integer",
+            "minimum": 0
+          },
+          "categories": {
+            "type": "array",
+            "items": {
+              "type": "object",
+              "required": [
+                "id",
+                "size"
+              ],
+              "properties": {
+                "id": {
+                  "type": "string",
+                  "enum": [
+                    "vault",
+                    "databases",
+                    "fonts",
+                    "themes",
+                    "plugins",
+                    "other"
+                  ]
+                },
+                "size": {
+                  "type": "integer",
+                  "minimum": 0
+                }
+              }
+            }
+          }
+        }
       }
     }
   }

internal/api/storage.go

@@ -0,0 +1,137 @@
+package api
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"io/fs"
+	"net/http"
+	"path/filepath"
+	"strings"
+	"time"
+)
+
+type storageCategory struct {
+	ID   string `json:"id"`
+	Size int64  `json:"size"`
+}
+
+type storageUsage struct {
+	TotalSize    int64             `json:"totalSize"`
+	Categories   []storageCategory `json:"categories"`
+	AssetsSize   int64             `json:"assetsSize"`
+	TrashSize    int64             `json:"trashSize"`
+	CalculatedAt int64             `json:"calculatedAt"`
+}
+
+func (s *Server) getStorage(w http.ResponseWriter, r *http.Request) {
+	usage, err := scanStorage(r.Context(), s.DataDir, s.vault.Root())
+	if err != nil {
+		internalError(w, r, err)
+		return
+	}
+	writeJSON(w, http.StatusOK, usage)
+}
+
+// 只统计普通文件逻辑字节，不跟随内部符号链接；外置仓库单独扫描。
+// 两个根互相嵌套时，各自由更具体的根负责，避免重复计算。
+func scanStorage(ctx context.Context, dataDir, vaultDir string) (storageUsage, error) {
+	usage := storageUsage{Categories: []storageCategory{{ID: "vault"}, {ID: "databases"}, {ID: "fonts"}, {ID: "themes"}, {ID: "plugins"}, {ID: "other"}}}
+	if dataDir == "" {
+		return usage, fmt.Errorf("未配置应用数据目录")
+	}
+	dataRoot, err := filepath.EvalSymlinks(dataDir)
+	if err != nil {
+		return usage, err
+	}
+	dataRoot, err = filepath.Abs(dataRoot)
+	if err != nil {
+		return usage, err
+	}
+	vaultRoot, err := filepath.Abs(vaultDir)
+	if err != nil {
+		return usage, err
+	}
+	appCategory := func(rel string) int {
+		top := strings.Split(filepath.ToSlash(rel), "/")[0]
+		switch top {
+		case "rawmark.db", "rawmark.db-wal", "rawmark.db-shm", "index.db", "index.db-wal", "index.db-shm":
+			return 1
+		case "fonts":
+			return 2
+		case "themes":
+			return 3
+		case "plugins":
+			return 4
+		default:
+			return 5
+		}
+	}
+	walk := func(root, skip string, isVault bool) error {
+		return filepath.WalkDir(root, func(path string, entry fs.DirEntry, walkErr error) error {
+			if err := ctx.Err(); err != nil {
+				return err
+			}
+			if walkErr != nil {
+				if path != root && errors.Is(walkErr, fs.ErrNotExist) {
+					return nil // 文件可能在扫描期间被移动或删除。
+				}
+				return walkErr
+			}
+			if path != root && path == skip && entry.IsDir() {
+				return filepath.SkipDir
+			}
+			if entry.IsDir() || entry.Type()&fs.ModeSymlink != 0 {
+				return nil
+			}
+			info, err := entry.Info()
+			if errors.Is(err, fs.ErrNotExist) {
+				return nil
+			}
+			if err != nil {
+				return err
+			}
+			if !info.Mode().IsRegular() {
+				return nil
+			}
+			rel, err := filepath.Rel(root, path)
+			if err != nil {
+				return err
+			}
+			category := 0
+			if !isVault || dataRoot == vaultRoot {
+				category = appCategory(rel)
+				if isVault && category == 5 {
+					category = 0
+				}
+			}
+			size := info.Size()
+			usage.TotalSize += size
+			usage.Categories[category].Size += size
+			if category == 0 {
+				parts := strings.Split(filepath.ToSlash(rel), "/")
+				if len(parts) >= 3 && parts[0] == ".rawmark" && parts[1] == "trash" {
+					usage.TrashSize += size
+				} else {
+					for _, part := range parts[:len(parts)-1] {
+						if part == "assets" || strings.HasSuffix(part, ".assets") {
+							usage.AssetsSize += size
+							break
+						}
+					}
+				}
+			}
+			return nil
+		})
+	}
+	if dataRoot != vaultRoot {
+		if err := walk(dataRoot, vaultRoot, false); err != nil {
+			return storageUsage{}, err
+		}
+	}
+	if err := walk(vaultRoot, dataRoot, true); err != nil {
+		return storageUsage{}, err
+	}
+	usage.CalculatedAt = time.Now().UnixMilli()
+	return usage, nil
+}

internal/api/storage_test.go

@@ -0,0 +1,81 @@
+package api
+
+import (
+	"context"
+	"errors"
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestStorageCountsOwnedRootsOnce(t *testing.T) {
+	for _, layout := range []string{"nested-vault", "external-vault", "nested-data", "same-root"} {
+		t.Run(layout, func(t *testing.T) {
+			root := t.TempDir()
+			data, vault := filepath.Join(root, "data"), filepath.Join(root, "data", "vault")
+			switch layout {
+			case "external-vault":
+				vault = filepath.Join(root, "external")
+			case "nested-data":
+				vault, data = root, filepath.Join(root, "app")
+			case "same-root":
+				vault = data
+			}
+			write := func(base, rel string, size int) {
+				t.Helper()
+				path := filepath.Join(base, rel)
+				if err := os.MkdirAll(filepath.Dir(path), 0755); err != nil {
+					t.Fatal(err)
+				}
+				if err := os.WriteFile(path, make([]byte, size), 0600); err != nil {
+					t.Fatal(err)
+				}
+			}
+			write(vault, "note.md", 5)
+			write(vault, "dir/assets/a.png", 7)
+			write(vault, "old.assets/b.png", 11)
+			write(vault, ".rawmark/trash/id/meta.json", 13)
+			write(vault, ".rawmark/trash/id/assets/a.png", 17)
+			write(data, "rawmark.db", 19)
+			write(data, "index.db-wal", 23)
+			write(data, "fonts/a/file.woff2", 29)
+			write(data, "themes/a/theme.css", 31)
+			write(data, "plugins/a/main.js", 37)
+			write(data, "misc.bin", 41)
+			outside := t.TempDir()
+			write(outside, "outside.md", 1000)
+			if err := os.Symlink(outside, filepath.Join(vault, "link")); err != nil {
+				t.Fatal(err)
+			}
+			usage, err := scanStorage(context.Background(), data, vault)
+			if err != nil {
+				t.Fatal(err)
+			}
+			want := map[string]int64{"vault": 53, "databases": 42, "fonts": 29, "themes": 31, "plugins": 37, "other": 41}
+			if layout == "same-root" {
+				want["vault"] += 41
+				want["other"] = 0
+			}
+			for _, category := range usage.Categories {
+				if category.Size != want[category.ID] {
+					t.Errorf("%s = %d, want %d", category.ID, category.Size, want[category.ID])
+				}
+			}
+			if usage.TotalSize != 233 || usage.AssetsSize != 18 || usage.TrashSize != 30 || usage.CalculatedAt <= 0 {
+				t.Fatalf("总量或子项不符: %+v", usage)
+			}
+		})
+	}
+}
+
+func TestStorageDoesNotReturnPartialSuccess(t *testing.T) {
+	root := t.TempDir()
+	if _, err := scanStorage(context.Background(), root, filepath.Join(root, "missing")); !errors.Is(err, os.ErrNotExist) {
+		t.Fatalf("仓库缺失应报错: %v", err)
+	}
+	ctx, cancel := context.WithCancel(context.Background())
+	cancel()
+	if _, err := scanStorage(ctx, root, root); !errors.Is(err, context.Canceled) {
+		t.Fatalf("请求取消应停止扫描: %v", err)
+	}
+}

internal/api/trash_test.go

@@ -34,13 +34,16 @@ func TestTrashRetentionSettingsValidation(t *testing.T) {
 	}
 }
 
-func TestTrashClearAuthorization(t *testing.T) {
+func TestStorageAndTrashClearAuthorization(t *testing.T) {
 	f := newFixture(t)
 	f.write("a.md", "content")
 	decode[vault.TrashItem](t, f.do(f.admin, "DELETE", "/api/v1/files/a.md", "", nil))
 	for _, scope := range []string{"read", "write"} {
 		token := decode[struct{ Token string }](t, f.do(f.admin, "POST", "/api/v1/tokens", `{"name":"test","scope":"`+scope+`"}`, nil)).Token
 		headers := map[string]string{"Authorization": "Bearer " + token}
+		if code := f.status(&http.Client{}, "GET", "/api/v1/storage", "", headers); code != 403 {
+			t.Fatalf("存储统计仅接受会话: %d", code)
+		}
 		if scope == "read" {
 			if code := f.status(&http.Client{}, "DELETE", "/api/v1/trash", "", headers); code != 403 {
 				t.Fatalf("只读不能清空: %d", code)
@@ -52,6 +55,13 @@ func TestTrashClearAuthorization(t *testing.T) {
 			}
 		}
 	}
+	usage := decode[storageUsage](t, f.do(f.admin, "GET", "/api/v1/storage", "", nil))
+	if usage.TotalSize <= 0 || len(usage.Categories) != 6 {
+		t.Fatalf("会话统计: %+v", usage)
+	}
+	if code := f.status(&http.Client{}, "GET", "/api/v1/storage", "", nil); code != 401 {
+		t.Fatalf("匿名不能查看: %d", code)
+	}
 }
 
 func TestCleanupUsesSavedRetentionAndPreservesInvalidEntries(t *testing.T) {

web/src/app/SettingsDialog.vue

@@ -14,6 +14,7 @@ import { SETTINGS_SECTIONS, searchSettings, type SettingSearchResult } from './s
 import ShortcutSettings from './ShortcutSettings.vue'
 import TokensPanel from './TokensPanel.vue'
 import TrashPanel from './TrashPanel.vue'
+import StoragePanel from './StoragePanel.vue'
 import { toast, ws, type SettingsSection } from './workspace'
 
 const buildVersion = import.meta.env.DEV ? '开发版' : document.querySelector<HTMLMetaElement>('meta[name="rawmark-version"]')?.content
@@ -204,6 +205,7 @@ async function changePassword() {
             <ShortcutSettings v-else-if="section === 'shortcuts'" />
             <TokensPanel v-else-if="section === 'tokens'" />
             <TrashPanel v-else-if="section === 'trash'" />
+            <StoragePanel v-else-if="section === 'application'" />
             <template v-else-if="section === 'about'">
               <p class="rm-share-note">RawMark · 纯 Markdown 笔记编辑器，文件即真源。</p>
               <SettingRow id="version"><code>{{ buildVersion }}</code></SettingRow>

web/src/app/StoragePanel.vue

@@ -0,0 +1,82 @@
+<script setup lang="ts">
+import { computed, onBeforeUnmount, ref } from 'vue'
+import { api, type StorageUsage } from './api'
+import SettingRow from './SettingRow.vue'
+
+const usage = ref<StorageUsage | null>(null)
+const busy = ref(false)
+const error = ref('')
+let mounted = true
+onBeforeUnmount(() => { mounted = false })
+
+const names: Record<StorageUsage['categories'][number]['id'], string> = { vault: '笔记库', databases: '数据库', fonts: '字体', themes: '主题', plugins: '插件', other: '其他' }
+const colors = ['var(--rm-accent)', '#56a89c', '#bd9364', '#a88ac2', '#d57e8d', '#8d99a8']
+const segments = computed(() => {
+  let offset = 0
+  return (usage.value?.categories ?? []).map((category, index) => {
+    const percent = usage.value!.totalSize ? category.size / usage.value!.totalSize * 100 : 0
+    const segment = { ...category, percent, offset, color: colors[index] }
+    offset += percent
+    return segment
+  })
+})
+
+function size(value: number): string {
+  const units = ['B', 'KiB', 'MiB', 'GiB', 'TiB']
+  const unit = value > 0 ? Math.min(Math.floor(Math.log(value) / Math.log(1024)), units.length - 1) : 0
+  return `${(value / 1024 ** unit).toLocaleString('zh-CN', { maximumFractionDigits: unit ? 2 : 0 })} ${units[unit]}`
+}
+const updated = computed(() => usage.value ? new Intl.DateTimeFormat('zh-CN', { dateStyle: 'short', timeStyle: 'medium' }).format(usage.value.calculatedAt) : '')
+async function scan() {
+  if (busy.value) return
+  busy.value = true
+  error.value = ''
+  try {
+    const next = await api.storage()
+    if (mounted) usage.value = next
+  } catch (cause) {
+    if (mounted) error.value = '统计失败：' + String(cause)
+  } finally { if (mounted) busy.value = false }
+}
+</script>
+
+<template>
+  <div>
+    <SettingRow id="storage"><button class="rm-btn" :disabled="busy" @click="scan">{{ busy ? '统计中…' : usage ? '刷新' : '查看' }}</button></SettingRow>
+    <p class="rm-share-note">统计普通文件实际字节；附件与回收站已包含在笔记库内。不跟随内部符号链接，不包含数据目录外的运维备份。</p>
+    <p v-if="error" class="rm-auth-error" role="alert">{{ error }}</p>
+    <div v-if="usage" class="rm-storage" :aria-busy="busy">
+      <div class="rm-storage-summary">
+        <svg viewBox="0 0 120 120" role="img" aria-label="各类存储空间占比">
+          <circle cx="60" cy="60" r="46" fill="none" stroke="var(--rm-divider)" stroke-width="14" />
+          <circle v-for="segment in segments" :key="segment.id" cx="60" cy="60" r="46" pathLength="100" fill="none" :stroke="segment.color" stroke-width="14" :stroke-dasharray="`${segment.percent} ${100 - segment.percent}`" :stroke-dashoffset="-segment.offset" transform="rotate(-90 60 60)" />
+        </svg>
+        <div><span>总占用</span><strong :title="`${usage.totalSize} 字节`">{{ size(usage.totalSize) }}</strong><small>统计时间：{{ updated }}</small></div>
+      </div>
+      <dl class="rm-storage-list">
+        <template v-for="segment in segments" :key="segment.id">
+          <div><dt><i :style="{ background: segment.color }" />{{ names[segment.id] }}</dt><dd :title="`${segment.size} 字节`">{{ size(segment.size) }} <small>{{ segment.percent.toFixed(1) }}%</small></dd></div>
+          <template v-if="segment.id === 'vault'">
+            <div class="rm-storage-sub"><dt>附件</dt><dd :title="`${usage.assetsSize} 字节`">{{ size(usage.assetsSize) }} <small>{{ (usage.totalSize ? usage.assetsSize / usage.totalSize * 100 : 0).toFixed(1) }}%</small></dd></div>
+            <div class="rm-storage-sub"><dt>回收站</dt><dd :title="`${usage.trashSize} 字节`">{{ size(usage.trashSize) }} <small>{{ (usage.totalSize ? usage.trashSize / usage.totalSize * 100 : 0).toFixed(1) }}%</small></dd></div>
+          </template>
+        </template>
+      </dl>
+    </div>
+  </div>
+</template>
+
+<style scoped>
+.rm-storage-summary { display: flex; align-items: center; gap: 20px; margin: 20px 0; }
+.rm-storage-summary svg { width: 128px; height: 128px; flex-shrink: 0; }
+.rm-storage-summary strong { display: block; font-size: var(--rm-ui-font-heading); margin: 6px 0; }
+.rm-storage-summary small { display: block; color: var(--rm-text-muted); }
+.rm-storage-list { margin: 0; }
+.rm-storage-list > div { display: flex; justify-content: space-between; gap: 12px; padding: 8px 0; }
+.rm-storage-list dt { display: flex; align-items: center; gap: 8px; }
+.rm-storage-list i { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }
+.rm-storage-list dd { margin: 0; text-align: right; }
+.rm-storage-list small { display: inline-block; min-width: 52px; color: var(--rm-text-muted); }
+.rm-storage-list .rm-storage-sub { padding-left: 18px; color: var(--rm-text-muted); }
+@media (max-width: 480px) { .rm-storage-summary { gap: 12px; flex-wrap: wrap; } .rm-storage-summary svg { width: 100px; height: 100px; } }
+</style>

web/src/app/api.ts

@@ -57,6 +57,14 @@ export interface TrashItem {
   deletedAt: number
 }
 
+export interface StorageUsage {
+  totalSize: number
+  categories: { id: 'vault' | 'databases' | 'fonts' | 'themes' | 'plugins' | 'other'; size: number }[]
+  assetsSize: number
+  trashSize: number
+  calculatedAt: number
+}
+
 export interface TrashPurgeResult {
   deleted: string[]
   failed: { id: string; error: string }[]
@@ -221,6 +229,7 @@ export const api = {
     json<{ token: string; info: ApiToken }>(request('POST', '/api/v1/tokens', { json: { name, scope } })),
   deleteToken: (id: string) => request('DELETE', '/api/v1/tokens/' + encodeURIComponent(id)),
 
+  storage: () => json<StorageUsage>(request('GET', '/api/v1/storage')),
   clearTrash: () => json<TrashPurgeResult>(request('DELETE', '/api/v1/trash')),
   trash: async () => (await json<{ items: TrashItem[] }>(request('GET', '/api/v1/trash'))).items,
   restore: (id: string) => json<TrashItem>(request('POST', `/api/v1/trash/${id}/restore`)),

web/src/app/settings.test.ts

@@ -150,7 +150,7 @@ describe('设置查找与重置', () => {
     expect(allCommands().map(command => command.id)).not.toContain('app.shares')
     ws.settings = 'appearance'
     mount(SettingsDialog)
-    expect(host!.querySelectorAll('.rm-settings-tab')).toHaveLength(8)
+    expect(host!.querySelectorAll('.rm-settings-tab')).toHaveLength(9)
     expect(host!.textContent).not.toContain('分享')
   })
 
@@ -320,7 +320,28 @@ describe('快捷键查找', () => {
   })
 })
 
-describe('回收站', () => {
+describe('应用存储与回收站', () => {
+  const usage = { totalSize: 1024, categories: [{ id: 'vault' as const, size: 1024 }], assetsSize: 512, trashSize: 256, calculatedAt: 1700000000000 }
+  it('按需统计，防重复请求，刷新失败保留上次结果并展示错误', async () => {
+    let resolve!: (value: typeof usage) => void
+    const storage = vi.spyOn(api, 'storage').mockImplementationOnce(() => new Promise(done => { resolve = done }))
+    ws.settings = 'application'
+    mount(SettingsDialog)
+    expect(storage).not.toHaveBeenCalled()
+    const button = host!.querySelector<HTMLButtonElement>('#rm-setting-storage button')!
+    button.click()
+    await nextTick()
+    expect(button.disabled).toBe(true)
+    button.click()
+    expect(storage).toHaveBeenCalledTimes(1)
+    resolve(usage)
+    await vi.waitFor(() => expect(host!.textContent).toContain('1 KiB'))
+    expect(host!.textContent).toContain('附件')
+    storage.mockRejectedValueOnce(new Error('磁盘读取错误'))
+    button.click()
+    await vi.waitFor(() => expect(host!.querySelector('[role="alert"]')?.textContent).toContain('磁盘读取错误'))
+    expect(host!.textContent).toContain('1 KiB')
+  })
   it('清空必须确认；防止重复操作，部分失败后重读并保留错误详情', async () => {
     const item = { id: 'one', path: 'broken.md', dir: false, deletedAt: Date.now() }
     vi.spyOn(api, 'trash').mockResolvedValue([item])

web/src/app/settingsCatalog.ts

@@ -2,6 +2,7 @@ import type { IconName } from './Icon.vue'
 import type { SettingsSection } from './workspace'
 
 export const SETTINGS_SECTIONS: { id: SettingsSection; title: string; icon: IconName; description: string }[] = [
+  { id: 'application', title: '应用', icon: 'grid', description: '查看存储空间及各类文件占用' },
   { id: 'appearance', title: '外观', icon: 'palette', description: '界面字号、主题、明暗模式与 CSS 片段' },
   { id: 'editor', title: '编辑器', icon: 'edit', description: '正文排版、代码字体与编辑行为' },
   { id: 'shortcuts', title: '快捷键', icon: 'command', description: '查找命令，添加、移除或重置快捷键' },
@@ -13,6 +14,7 @@ export const SETTINGS_SECTIONS: { id: SettingsSection; title: string; icon: Icon
 ]
 
 export const SETTING_ITEMS = {
+  'storage': { section: 'application', title: '存储空间', description: '按需统计笔记库、数据库、字体、主题、插件及其他文件的大小；包含外置笔记库。', keywords: '容量 占用 大小 附件 图片 回收站' },
   'trash-retention': { section: 'trash', title: '自动删除期限', description: '按原删除时间计算，默认 30 天；0 表示永不自动删除。修改期限会影响已有条目，服务启动及每小时清理一次。', keywords: '回收站 天数 自动 清理 保留' },
   'trash-clear': { section: 'trash', title: '清空全部', description: '永久删除回收站中的全部条目，无法撤销。', keywords: '回收站 清理 全部 删除' },
   'ui-font': { section: 'appearance', title: '界面字体', description: '用于菜单、侧栏与按钮；可导入或删除字体，Maple 为不可删除的默认字体。', keywords: 'UI 字体 导入 删除 TTF OTF WOFF' },

web/src/app/workspace.ts

@@ -36,7 +36,7 @@ export interface Tab {
   conflictRev?: string
 }
 
-export type SettingsSection = 'appearance' | 'editor' | 'account' | 'shortcuts' | 'tokens' | 'trash' | 'plugins' | 'about'
+export type SettingsSection = 'appearance' | 'editor' | 'account' | 'shortcuts' | 'tokens' | 'trash' | 'plugins' | 'about' | 'application'
 
 export interface Toast {
   id: number