make textarea styles consistent with other inputs

- Fix custom tag keys being silently dropped by TagLib — unknown keys are now uppercased before write since TagLib requires all-caps Vorbis field names
- Add real-time validation for invalid characters (= and non-ASCII) in custom tag keys
- Show 'Field already exists' error on Enter/+ attempt rather than silently doing nothing
- Resolve typed tag labels to canonical keys (e.g. 'Album Sort' → albumSort) to prevent duplicate entries under a different key
- Atomic duplicate check in hook functional updater prevents race conditions from rapid adds
- Scroll to and focus newly added field after it is inserted
- Consolidate FIELD_LABEL_OVERRIDES, FIELD_TYPE_OVERRIDES, and PICARD_EXTRAS into a single TAG_CONFIG object; extract resolveTagKey helper

Dockerfile

@@ -5,6 +5,9 @@ WORKDIR /app
 # Copy package.json first to cache node_modules
 COPY package.json pnpm-lock.yaml pnpm-workspace.yaml .
 
+# Match packageManager in package.json (pnpm is not bundled in the Node image)
+RUN corepack enable && corepack prepare pnpm@11.5.2 --activate
+
 RUN pnpm install
 
 # Copy code and build with cached modules

package.json

@@ -120,6 +120,7 @@
         "md5": "^2.3.0",
         "motion": "^12.40.0",
         "mpris-service": "^2.1.2",
+        "music-metadata": "^11.12.3",
         "nanoid": "^3.3.12",
         "node-mpv": "github:jeffvli/Node-MPV#32b4d64395289ad710c41d481d2707a7acfc228f",
         "overlayscrollbars": "^2.16.0",
@@ -139,6 +140,7 @@
         "react-window-v2": "npm:react-window@^2.2.7",
         "semver": "^7.8.2",
         "string-to-color": "^2.2.2",
+        "taglib-wasm": "^1.5.0",
         "wavesurfer.js": "^7.12.7",
         "ws": "^8.21.0",
         "zod": "^3.25.76",

pnpm-workspace.yaml

@@ -4,6 +4,8 @@ allowBuilds:
     electron-winstaller: true
     esbuild: true
 minimumReleaseAge: 1440
+minimumReleaseAgeExclude:
+    - 'taglib-wasm@1.3.0'
 overrides:
     'xml2js': '0.5.0'
     'react-router': '7.14.0'

src/i18n/locales/en.json

@@ -161,6 +161,7 @@
         "trackGain": "Track gain",
         "trackPeak": "Track peak",
         "translation": "Translation",
+        "undo": "Undo",
         "unknown": "Unknown",
         "version": "Version",
         "year": "Year",
@@ -541,7 +542,8 @@
             "goTo": "Go to",
             "goToAlbum": "Go to $t(entity.album, {\"count\": 1})",
             "goToAlbumArtist": "Go to $t(entity.albumArtist, {\"count\": 1})",
-            "showDetails": "Get info"
+            "showDetails": "Get info",
+            "editMetadata": "Edit Metadata"
         },
         "fullscreenPlayer": {
             "config": {
@@ -602,9 +604,27 @@
             "title": "$t(common.home)"
         },
         "itemDetail": {
+            "multiValueFields": "Multi-value fields",
+            "multiValueFieldsDescription": "Fields in this list use a tag input and are saved as separate metadata values. Parsed multivalue fields use it automatically. Lyrics are always handled separately.",
+            "addMultiValueField": "Add multivalue field…",
+            "addFavoriteValue": "Add favorite value…",
+            "addFavoriteValueOption": "Add \"{{value}}\" as a favorite…",
             "copyPath": "Copy path to clipboard",
             "copiedPath": "Path copied successfully",
-            "openFile": "Show track in file manager"
+            "openFile": "Show track in file manager",
+            "fileNotWritable": "File is not accessible or not writable",
+            "triggerRescan": "Trigger library rescan after saving",
+            "addField": "Add field…",
+            "emptyFields": "Fields cannot be empty",
+            "tagsTab": "Tags",
+            "artworkTab": "Artwork",
+            "removeArtwork": "Remove Artwork",
+            "noArtwork": "No Artwork",
+            "multipleValues": "(Multiple Values)",
+            "multipleArtworks": "Multiple Artworks",
+            "noLocalSongs": "No songs with local file paths found",
+            "readPartialFailure": "Could not read metadata from {{count}} of {{total}} file(s)",
+            "writePartialFailure": "Failed to save {{count}} file(s)"
         },
         "playlist": {
             "reorder": "Reordering only enabled when sorting by ID"

src/main/features/core/index.ts

@@ -4,4 +4,5 @@ import './player';
 import './remote';
 import './settings';
 import './discord-rpc';
+import './tag-editor';
 import './visualizer';

src/main/features/core/tag-editor/index.ts

@@ -0,0 +1,114 @@
+import type {
+    ArtworkOp,
+    ReadSongMetadataBatchResult,
+    TagValue,
+    WriteSongTagsBatchResult,
+} from '/@/shared/types/tag-editor';
+
+import { ipcMain, type IpcMainInvokeEvent } from 'electron';
+
+import { readFilesMetadataBatch, readLocalImageFile, writeFilesTags } from './taglib-service';
+
+const sendBatchProgress = (event: IpcMainInvokeEvent, processed: number, total: number) => {
+    event.sender.send('batch-progress', { processed, total });
+};
+
+let activeReadController: AbortController | null = null;
+
+ipcMain.handle('cancel-read-song-metadata', () => {
+    activeReadController?.abort();
+    activeReadController = null;
+});
+
+ipcMain.handle(
+    'read-song-metadata-batch',
+    async (event, filePaths: string[]): Promise<ReadSongMetadataBatchResult> => {
+        activeReadController?.abort();
+        activeReadController = new AbortController();
+        const { signal } = activeReadController;
+
+        try {
+            const result = await readFilesMetadataBatch(
+                filePaths,
+                (processed, total) => sendBatchProgress(event, processed, total),
+                signal,
+            );
+
+            if (signal.aborted) {
+                return { artworkKind: 'none', success: false };
+            }
+
+            if (!result.success) {
+                return {
+                    artworkKind: 'none',
+                    error: result.failedFiles[0]?.error ?? 'No readable audio files in selection',
+                    failedFiles: result.failedFiles,
+                    readCount: result.readCount,
+                    success: false,
+                    totalCount: result.totalCount,
+                };
+            }
+
+            return {
+                artworkKind: result.artworkKind,
+                failedFiles: result.failedFiles.length > 0 ? result.failedFiles : undefined,
+                multiValueKeys: result.multiValueKeys,
+                readCount: result.readCount,
+                success: true,
+                tagSummary: result.tagSummary,
+                totalCount: result.totalCount,
+                ...(result.artworkData
+                    ? {
+                          artworkData: result.artworkData,
+                          artworkMimeType: result.artworkMimeType,
+                      }
+                    : {}),
+            };
+        } catch (err) {
+            return { artworkKind: 'none', error: String(err), success: false };
+        } finally {
+            activeReadController = null;
+        }
+    },
+);
+
+ipcMain.handle(
+    'write-song-tags-batch',
+    async (
+        event,
+        filePaths: string[],
+        edits: Record<string, TagValue>,
+        removed: string[],
+        artworkOp?: ArtworkOp,
+    ): Promise<WriteSongTagsBatchResult> => {
+        try {
+            const result = await writeFilesTags(
+                filePaths,
+                edits,
+                removed,
+                artworkOp,
+                (processed, total) => sendBatchProgress(event, processed, total),
+            );
+
+            if (!result.success) {
+                return {
+                    error: result.failedFiles[0]?.error,
+                    failedFiles: result.failedFiles,
+                    success: false,
+                };
+            }
+            return { success: true };
+        } catch (err) {
+            return { error: String(err), success: false };
+        }
+    },
+);
+
+ipcMain.handle('read-local-image', async (_event, filePath: string) => {
+    try {
+        const { data, mimeType } = await readLocalImageFile(filePath);
+        return { data, mimeType, success: true };
+    } catch (err) {
+        return { error: String(err), success: false };
+    }
+});

src/main/features/core/tag-editor/taglib-service.ts

@@ -0,0 +1,298 @@
+import type { ArtworkKind, ArtworkOp, BatchFileError, TagValue } from '/@/shared/types/tag-editor';
+
+import { constants, promises as fsPromises } from 'fs';
+import { PROPERTIES, TagLib } from 'taglib-wasm';
+
+import { getImageMimeTypeFromPath } from '/@/shared/utils/image-mime';
+
+let _taglib: null | TagLib = null;
+
+const getTagLib = async (): Promise<TagLib> => {
+    if (!_taglib) _taglib = await TagLib.initialize();
+    return _taglib;
+};
+
+const BATCH_CONCURRENCY = 8;
+
+/** Returns an error entry for each path that is missing or not writable by the current process. */
+export async function checkPathsWritable(paths: string[]): Promise<BatchFileError[]> {
+    const failed: BatchFileError[] = [];
+    await Promise.all(
+        paths.map(async (filePath) => {
+            try {
+                await fsPromises.access(filePath, constants.F_OK | constants.W_OK);
+            } catch (err) {
+                failed.push({
+                    error: err instanceof Error ? err.message : String(err),
+                    path: filePath,
+                });
+            }
+        }),
+    );
+    return failed;
+}
+
+/** Reads an image file and returns it as base64 + MIME type for IPC transport to the renderer. */
+export async function readLocalImageFile(filePath: string) {
+    const buf = await fsPromises.readFile(filePath);
+    return {
+        data: buf.toString('base64'),
+        mimeType: getImageMimeTypeFromPath(filePath),
+    };
+}
+
+/** Normalizes a taglib-wasm PropertyMap while preserving true multivalue arrays. */
+function normalizeProperties(
+    props: Record<string, string[] | undefined>,
+): Record<string, TagValue> {
+    const normalized: Record<string, TagValue> = {};
+    for (const [key, values] of Object.entries(props)) {
+        if (values && values.length > 0 && values[0] !== '') {
+            normalized[key] = values.length === 1 ? values[0] : [...values];
+        }
+    }
+    const coveredByUpperCase = new Set(
+        Object.keys(normalized)
+            .filter((k) => k !== k.toUpperCase())
+            .map((k) => k.toUpperCase()),
+    );
+    for (const key of Object.keys(normalized)) {
+        if (key === key.toUpperCase() && coveredByUpperCase.has(key)) {
+            delete normalized[key];
+        }
+    }
+    return normalized;
+}
+
+const tagValuesEqual = (a: TagValue, b: TagValue | undefined): boolean => {
+    if (Array.isArray(a) || Array.isArray(b)) {
+        return (
+            Array.isArray(a) &&
+            Array.isArray(b) &&
+            a.length === b.length &&
+            a.every((value, index) => value === b[index])
+        );
+    }
+    return a === b;
+};
+
+/** Runs `fn` over `items` with at most `concurrency` tasks in flight at once. Stops early if `signal` is aborted. */
+const mapWithConcurrency = async <T>(
+    items: T[],
+    concurrency: number,
+    fn: (item: T) => Promise<void>,
+    signal?: AbortSignal,
+): Promise<void> => {
+    let nextIndex = 0;
+    const worker = async () => {
+        while (nextIndex < items.length) {
+            if (signal?.aborted) return;
+            const index = nextIndex;
+            nextIndex += 1;
+            await fn(items[index]);
+        }
+    };
+    await Promise.all(Array.from({ length: Math.min(concurrency, items.length) }, () => worker()));
+};
+
+/**
+ * Reads all tags and artwork from a batch of audio files via taglib-wasm.
+ * Returns every tag present on disk — not limited to any known-field list.
+ * Values that differ across files are merged to `null` and shown as "(Multiple Values)" in the editor.
+ * Artwork bytes are captured from the first successful file; subsequent files only contribute their size for comparison.
+ */
+export async function readFilesMetadataBatch(
+    filePaths: string[],
+    onProgress?: (processed: number, total: number) => void,
+    signal?: AbortSignal,
+): Promise<{
+    artworkData?: string;
+    artworkKind: ArtworkKind;
+    artworkMimeType?: string;
+    failedFiles: BatchFileError[];
+    multiValueKeys: string[];
+    readCount: number;
+    success: boolean;
+    tagSummary: Record<string, null | TagValue>;
+    totalCount: number;
+}> {
+    const totalCount = filePaths.length;
+    const failedFiles: BatchFileError[] = [];
+    const multiValueKeys = new Set<string>();
+    const tagSummary: Record<string, null | TagValue> = {};
+    let artworkKind = 'none' as ArtworkKind;
+    let artworkByteSize: number | undefined;
+    let artworkData: string | undefined;
+    let artworkMimeType: string | undefined;
+    let readCount = 0;
+    let processed = 0;
+
+    const taglib = await getTagLib();
+
+    await mapWithConcurrency(
+        filePaths,
+        BATCH_CONCURRENCY,
+        async (filePath) => {
+            try {
+                const file = await taglib.open(filePath);
+                try {
+                    const rawProperties = file.properties();
+                    const embeddedLyrics = file.getLyrics();
+                    if (embeddedLyrics.length > 0) {
+                        rawProperties.lyrics = [
+                            embeddedLyrics.map(({ text }) => text).join('\n\n'),
+                        ];
+                    }
+                    const normalized = normalizeProperties(rawProperties);
+                    for (const [key, value] of Object.entries(normalized)) {
+                        if (Array.isArray(value)) multiValueKeys.add(key);
+                    }
+                    const pictures = file.getPictures();
+                    const frontCover = pictures.find((p) => p.type === 'FrontCover') ?? pictures[0];
+                    const hasCoverArt = frontCover !== undefined;
+                    const picSize = hasCoverArt ? frontCover.data.length : undefined;
+
+                    if (readCount === 0) {
+                        Object.assign(tagSummary, normalized);
+                        artworkKind = hasCoverArt ? 'common' : 'none';
+                        artworkByteSize = picSize;
+                        if (frontCover) {
+                            artworkData = Buffer.from(frontCover.data).toString('base64');
+                            artworkMimeType = frontCover.mimeType;
+                        }
+                    } else {
+                        for (const k of Object.keys(tagSummary)) {
+                            if (
+                                tagSummary[k] !== null &&
+                                !tagValuesEqual(tagSummary[k], normalized[k])
+                            )
+                                tagSummary[k] = null;
+                        }
+                        for (const k of Object.keys(normalized)) {
+                            if (!(k in tagSummary)) tagSummary[k] = null;
+                        }
+                        if (artworkKind !== 'mixed') {
+                            if (
+                                hasCoverArt !== (artworkKind === 'common') ||
+                                picSize !== artworkByteSize
+                            ) {
+                                artworkKind = 'mixed';
+                            }
+                        }
+                    }
+
+                    readCount += 1;
+                } finally {
+                    file.dispose();
+                }
+            } catch (err) {
+                failedFiles.push({
+                    error: err instanceof Error ? err.message : String(err),
+                    path: filePath,
+                });
+            }
+            processed += 1;
+            onProgress?.(processed, totalCount);
+        },
+        signal,
+    );
+
+    return {
+        artworkKind,
+        failedFiles,
+        multiValueKeys: [...multiValueKeys],
+        readCount,
+        success: readCount > 0,
+        tagSummary,
+        totalCount,
+        ...(artworkData ? { artworkData, artworkMimeType } : {}),
+    };
+}
+
+/**
+ * Writes tag edits and/or artwork to a batch of audio files in-place via taglib-wasm (WASI).
+ * Only the fields present in `edits`/`removed` are touched — all other existing tags are preserved.
+ * Array values are written as true multivalue properties; scalar values remain single-valued.
+ * Lyrics use TagLib's dedicated unsynchronized-lyrics API.
+ */
+export async function writeFilesTags(
+    filePaths: string[],
+    edits: Record<string, TagValue>,
+    removed: string[],
+    artworkOp?: ArtworkOp,
+    onProgress?: (processed: number, total: number) => void,
+): Promise<{ failedFiles: BatchFileError[]; success: boolean }> {
+    const notWritable = await checkPathsWritable(filePaths);
+    const notWritableSet = new Set(notWritable.map((f) => f.path));
+
+    const writablePaths = filePaths.filter((p) => !notWritableSet.has(p));
+    const failedFiles: BatchFileError[] = [...notWritable];
+
+    if (writablePaths.length === 0) {
+        return { failedFiles, success: false };
+    }
+
+    const hasEdits = Object.keys(edits).length > 0 || removed.length > 0;
+
+    if (!hasEdits && !artworkOp) {
+        return { failedFiles, success: failedFiles.length === 0 };
+    }
+
+    const taglib = await getTagLib();
+    let processed = 0;
+    const total = writablePaths.length;
+
+    await mapWithConcurrency(writablePaths, BATCH_CONCURRENCY, async (path) => {
+        try {
+            await taglib.edit(path, (file) => {
+                const propertyEdits = Object.entries(edits).filter(([key]) => key !== 'lyrics');
+                const propertyRemovals = removed.filter((key) => key !== 'lyrics');
+
+                if (propertyEdits.length > 0 || propertyRemovals.length > 0) {
+                    const properties = file.properties();
+
+                    for (const [key, value] of propertyEdits) {
+                        const propertyKey = key in PROPERTIES ? key : key.toUpperCase();
+                        properties[propertyKey] = Array.isArray(value) ? value : [value];
+                    }
+
+                    for (const key of propertyRemovals) {
+                        const propertyKey = key in PROPERTIES ? key : key.toUpperCase();
+                        delete properties[propertyKey];
+                    }
+
+                    file.setProperties(properties);
+                }
+
+                if (removed.includes('lyrics')) {
+                    file.setLyrics([]);
+                } else if (edits.lyrics !== undefined) {
+                    file.setLyrics([
+                        {
+                            text: Array.isArray(edits.lyrics)
+                                ? edits.lyrics.join('\n\n')
+                                : edits.lyrics,
+                        },
+                    ]);
+                }
+
+                if (artworkOp?.type === 'clear') {
+                    file.removePictures();
+                } else if (artworkOp?.type === 'set') {
+                    file.removePictures();
+                    file.addPicture({
+                        data: artworkOp.bytes,
+                        mimeType: artworkOp.mimeType,
+                        type: 'FrontCover',
+                    });
+                }
+            });
+        } catch (err) {
+            failedFiles.push({ error: String(err), path });
+        }
+        processed += 1;
+        onProgress?.(processed, total);
+    });
+
+    return { failedFiles, success: failedFiles.length === 0 };
+}

src/main/index.ts

@@ -24,6 +24,7 @@ import electronLocalShortcut from 'electron-localshortcut';
 import log from 'electron-log/main';
 import { AppImageUpdater, autoUpdater, MacUpdater, NsisUpdater } from 'electron-updater';
 import { access, constants } from 'fs';
+import { createRequire } from 'module';
 import path, { join } from 'path';
 import semver from 'semver';
 
@@ -39,6 +40,10 @@ import { autoUpdaterLogInterface, createLog, hotkeyToElectronAccelerator } from
 import { disableAutoUpdates, isLinux, isMacOS, isWindows } from '/@/main/env';
 import { PlayerRepeat, PlayerStatus, PlayerType, TitleTheme } from '/@/shared/types/types';
 
+if (isWindows() && typeof (global as any).require !== 'function') {
+    (global as any).require = createRequire(__filename);
+}
+
 const ALPHA_UPDATER_CONFIG: {
     bucket: string;
     channel: string;

src/preload/utils.ts

@@ -1,4 +1,13 @@
-import { ipcRenderer, webFrame } from 'electron';
+import { ipcRenderer, type IpcRendererEvent, webFrame } from 'electron';
+
+import type {
+    ArtworkOp,
+    BatchProgress,
+    ReadLocalImageResult,
+    ReadSongMetadataBatchResult,
+    TagValue,
+    WriteSongTagsBatchResult,
+} from '../shared/types/tag-editor';
 
 import { disableAutoUpdates, isLinux, isMacOS, isWindows } from '../main/env';
 
@@ -6,6 +15,35 @@ const openItem = async (path: string) => {
     return ipcRenderer.invoke('open-item', path);
 };
 
+const cancelReadSongMetadata = (): void => {
+    ipcRenderer.invoke('cancel-read-song-metadata');
+};
+
+const readSongMetadataBatch = (filePaths: string[]): Promise<ReadSongMetadataBatchResult> => {
+    return ipcRenderer.invoke('read-song-metadata-batch', filePaths);
+};
+
+const writeSongTagsBatch = (
+    filePaths: string[],
+    edits: Record<string, TagValue>,
+    removed: string[],
+    artworkOp?: ArtworkOp,
+): Promise<WriteSongTagsBatchResult> => {
+    return ipcRenderer.invoke('write-song-tags-batch', filePaths, edits, removed, artworkOp);
+};
+
+const onBatchProgress = (cb: (event: IpcRendererEvent, data: BatchProgress) => void) => {
+    ipcRenderer.on('batch-progress', cb);
+};
+
+const offBatchProgress = (cb: (event: IpcRendererEvent, data: BatchProgress) => void) => {
+    ipcRenderer.removeListener('batch-progress', cb);
+};
+
+const readLocalImage = (filePath: string): Promise<ReadLocalImageResult> => {
+    return ipcRenderer.invoke('read-local-image', filePath);
+};
+
 const openApplicationDirectory = async () => {
     return ipcRenderer.invoke('open-application-directory');
 };
@@ -117,6 +155,7 @@ const rendererUpdateAvailable = (cb: (version: string) => void) => {
 };
 
 export const utils = {
+    cancelReadSongMetadata,
     checkForUpdates,
     customCssUpdatedListener,
     disableAutoUpdates,
@@ -127,10 +166,14 @@ export const utils = {
     isMacOS,
     isWindows,
     mainMessageListener,
+    offBatchProgress,
+    onBatchProgress,
     openApplicationDirectory,
     openCustomCssFolder,
     openItem,
     playerErrorListener,
+    readLocalImage,
+    readSongMetadataBatch,
     rendererOpenCommandPalette,
     rendererOpenManageServers,
     rendererOpenReleaseNotes,
@@ -143,6 +186,7 @@ export const utils = {
     setInputFocused,
     startPowerSaveBlocker,
     stopPowerSaveBlocker,
+    writeSongTagsBatch,
 };
 
 export type Utils = typeof utils;

src/renderer/api/controller.ts

@@ -786,6 +786,18 @@ export const controller: GeneralController = {
             server.type,
         )?.(addContext({ ...args, apiClientProps: { ...args.apiClientProps, server } }));
     },
+    refreshItems(args) {
+        const server = getServerById(args.apiClientProps.serverId);
+
+        if (!server) {
+            throw new Error(`${i18n.t('error.apiRouteError')}: refreshItems`);
+        }
+
+        return apiController(
+            'refreshItems',
+            server.type,
+        )?.(addContext({ ...args, apiClientProps: { ...args.apiClientProps, server } }));
+    },
     removeFromPlaylist(args) {
         const server = getServerById(args.apiClientProps.serverId);
 

src/renderer/api/jellyfin/jellyfin-api.ts

@@ -301,6 +301,18 @@ export const contract = c.router({
             400: jfType._response.error,
         },
     },
+    refreshItem: {
+        body: z.null(),
+        method: 'POST',
+        path: 'Items/:id/Refresh',
+        query: z.object({
+            MetadataRefreshMode: z.string().optional(),
+        }),
+        responses: {
+            204: z.null(),
+            400: jfType._response.error,
+        },
+    },
     removeFavorite: {
         body: jfType._parameters.favorite,
         method: 'DELETE',

src/renderer/api/jellyfin/jellyfin-controller.ts

@@ -1556,6 +1556,21 @@ export const JellyfinController: InternalControllerEndpoint = {
             throw new Error('Failed to move item in playlist');
         }
     },
+    refreshItems: async (args) => {
+        const { apiClientProps, query } = args;
+
+        await Promise.all(
+            query.ids.map((id) =>
+                jfApiClient(apiClientProps).refreshItem({
+                    body: null,
+                    params: { id },
+                    query: { MetadataRefreshMode: 'FullRefresh' },
+                }),
+            ),
+        );
+
+        return null;
+    },
     removeFromPlaylist: async (args) => {
         const { apiClientProps, query } = args;
 

src/renderer/api/navidrome/navidrome-controller.ts

@@ -1027,6 +1027,7 @@ export const NavidromeController: InternalControllerEndpoint = {
             throw new Error('Failed to move item in playlist');
         }
     },
+    refreshItems: SubsonicController.refreshItems,
     removeFromPlaylist: async (args) => {
         const { apiClientProps, query } = args;
 

src/renderer/api/subsonic/subsonic-api.ts

@@ -186,6 +186,14 @@ export const contract = c.router({
             200: ssType._response.randomSongList,
         },
     },
+    getScanStatus: {
+        method: 'GET',
+        path: 'getScanStatus.view',
+        query: ssType._parameters.getScanStatus,
+        responses: {
+            200: ssType._response.getScanStatus,
+        },
+    },
     getServerInfo: {
         method: 'GET',
         path: 'getOpenSubsonicExtensions.view',
@@ -345,6 +353,14 @@ export const contract = c.router({
             200: ssType._response.setRating,
         },
     },
+    startScan: {
+        method: 'GET',
+        path: 'startScan.view',
+        query: ssType._parameters.startScan,
+        responses: {
+            200: ssType._response.startScan,
+        },
+    },
     updateInternetRadioStation: {
         method: 'GET',
         path: 'updateInternetRadioStation.view',

src/renderer/api/subsonic/subsonic-controller.ts

@@ -2082,6 +2082,17 @@ export const SubsonicController: InternalControllerEndpoint = {
 
         return res.body;
     },
+    refreshItems: async (args) => {
+        const { apiClientProps } = args;
+
+        const res = await ssApiClient(apiClientProps).startScan({ query: {} });
+
+        if (res.status !== 200) {
+            throw new Error('Failed to start scan');
+        }
+
+        return null;
+    },
     removeFromPlaylist: async ({ apiClientProps, query }) => {
         const res = await ssApiClient(apiClientProps).updatePlaylist({
             query: {

src/renderer/features/context-menu/actions/edit-metadata-action.tsx

@@ -0,0 +1,38 @@
+import { openContextModal } from '@mantine/modals';
+import isElectron from 'is-electron';
+import { useCallback, useMemo } from 'react';
+import { useTranslation } from 'react-i18next';
+
+import { ContextMenu } from '/@/shared/components/context-menu/context-menu';
+import { Song } from '/@/shared/types/domain-types';
+
+interface EditMetadataActionProps {
+    albumIds?: string[];
+    songs?: Song[];
+}
+
+const utils = isElectron() ? window.api.utils : null;
+
+export const EditMetadataAction = ({ albumIds, songs: songItems }: EditMetadataActionProps) => {
+    const { t } = useTranslation();
+    const songs = useMemo(() => songItems?.filter((s) => s.path) ?? [], [songItems]);
+    const count = albumIds?.length ?? songs.length;
+
+    const onSelect = useCallback(() => {
+        openContextModal({
+            innerProps: { albumIds, songs },
+            modal: 'editMetadata',
+            size: 'xl',
+            styles: { body: { paddingBottom: 'var(--theme-spacing-xl)' } },
+            title: t('page.contextMenu.editMetadata'),
+        });
+    }, [albumIds, songs, t]);
+
+    if (!utils) return null;
+
+    return (
+        <ContextMenu.Item disabled={count === 0} leftIcon="edit" onSelect={onSelect}>
+            {t('page.contextMenu.editMetadata')}
+        </ContextMenu.Item>
+    );
+};

src/renderer/features/context-menu/menus/album-context-menu.tsx

@@ -2,6 +2,7 @@ import { useMemo } from 'react';
 
 import { AddToPlaylistAction } from '/@/renderer/features/context-menu/actions/add-to-playlist-action';
 import { DownloadAction } from '/@/renderer/features/context-menu/actions/download-action';
+import { EditMetadataAction } from '/@/renderer/features/context-menu/actions/edit-metadata-action';
 import { GetInfoAction } from '/@/renderer/features/context-menu/actions/get-info-action';
 import { GoToAction } from '/@/renderer/features/context-menu/actions/go-to-action';
 import { PlayAction } from '/@/renderer/features/context-menu/actions/play-action';
@@ -41,6 +42,7 @@ export const AlbumContextMenu = ({ items, type }: AlbumContextMenuProps) => {
             <ContextMenu.Divider />
             <GoToAction items={items} />
             <ContextMenu.Divider />
+            <EditMetadataAction albumIds={ids} />
             <GetInfoAction disabled={items.length === 0} items={items} />
         </ContextMenu.Content>
     );

src/renderer/features/context-menu/menus/playlist-song-context-menu.tsx

@@ -2,6 +2,7 @@ import { useMemo } from 'react';
 
 import { AddToPlaylistAction } from '/@/renderer/features/context-menu/actions/add-to-playlist-action';
 import { DownloadAction } from '/@/renderer/features/context-menu/actions/download-action';
+import { EditMetadataAction } from '/@/renderer/features/context-menu/actions/edit-metadata-action';
 import { GetInfoAction } from '/@/renderer/features/context-menu/actions/get-info-action';
 import { GoToAction } from '/@/renderer/features/context-menu/actions/go-to-action';
 import { PlayAction } from '/@/renderer/features/context-menu/actions/play-action';
@@ -46,6 +47,7 @@ export const PlaylistSongContextMenu = ({ items, type }: PlaylistSongContextMenu
             <GoToAction items={items} />
             <ShowInFileExplorerAction items={items} />
             <ContextMenu.Divider />
+            <EditMetadataAction songs={items} />
             <GetInfoAction disabled={items.length === 0} items={items} />
         </ContextMenu.Content>
     );

src/renderer/features/context-menu/menus/song-context-menu.tsx

@@ -2,6 +2,7 @@ import { useMemo } from 'react';
 
 import { AddToPlaylistAction } from '/@/renderer/features/context-menu/actions/add-to-playlist-action';
 import { DownloadAction } from '/@/renderer/features/context-menu/actions/download-action';
+import { EditMetadataAction } from '/@/renderer/features/context-menu/actions/edit-metadata-action';
 import { GetInfoAction } from '/@/renderer/features/context-menu/actions/get-info-action';
 import { GoToAction } from '/@/renderer/features/context-menu/actions/go-to-action';
 import { PlayAction } from '/@/renderer/features/context-menu/actions/play-action';
@@ -43,6 +44,7 @@ export const SongContextMenu = ({ items, type }: SongContextMenuProps) => {
             <GoToAction items={items} />
             <ShowInFileExplorerAction items={items} />
             <ContextMenu.Divider />
+            <EditMetadataAction songs={items} />
             <GetInfoAction disabled={items.length === 0} items={items} />
         </ContextMenu.Content>
     );

src/renderer/features/player/components/player-config.tsx

@@ -448,7 +448,7 @@ export const PitchControls = () => {
                 </Button>
             )}
             <Text size="xs" style={{ fontFamily: 'monospace' }} ta="center" w="60px">
-                {speed.toFixed(2)}% {speedToPitch(speed) > 0 && '+'}
+                {speed.toFixed(2)}x {speedToPitch(speed) > 0 && '+'}
                 {speedToPitch(speed) == 0 && '±'}
                 {speedToPitch(speed).toFixed(2)}st
             </Text>

src/renderer/features/tag-editor/components/add-field-input.tsx

@@ -0,0 +1,109 @@
+import { useRef, useState } from 'react';
+import { useTranslation } from 'react-i18next';
+
+import { KNOWN_TAG_MAP, resolveTagKey } from '../utils/known-tags';
+
+import { ActionIcon } from '/@/shared/components/action-icon/action-icon';
+import { Autocomplete } from '/@/shared/components/autocomplete/autocomplete';
+import { Group } from '/@/shared/components/group/group';
+
+interface AddFieldInputProps {
+    availableFields: Array<{ label: string; value: string }>;
+    existingFieldKeys: string[];
+    onAddField: (key: string) => void;
+}
+
+export const AddFieldInput = ({
+    availableFields,
+    existingFieldKeys,
+    onAddField,
+}: AddFieldInputProps) => {
+    const { t } = useTranslation();
+    const skipNextEnterRef = useRef(false);
+    const skipNextOnChangeResetRef = useRef(false);
+    const [input, setInput] = useState('');
+    const [duplicateAttempted, setDuplicateAttempted] = useState(false);
+
+    const trimmedInput = input.trim();
+    const customKeyError =
+        trimmedInput && !KNOWN_TAG_MAP.has(trimmedInput)
+            ? trimmedInput.includes('=')
+                ? "Tag key cannot contain '='"
+                : // eslint-disable-next-line no-control-regex
+                  /[^\x00-\x7F]/.test(trimmedInput)
+                  ? 'Tag key must use ASCII characters only'
+                  : null
+            : null;
+
+    const resolvedInputKey = trimmedInput ? resolveTagKey(trimmedInput) : '';
+    const duplicateError =
+        trimmedInput && !customKeyError && existingFieldKeys.includes(resolvedInputKey)
+            ? 'Field already exists'
+            : null;
+    const fieldError = customKeyError ?? (duplicateAttempted ? duplicateError : null);
+
+    const addField = (key: string): boolean => {
+        const trimmed = key.trim();
+        if (!trimmed) return false;
+        if (
+            !KNOWN_TAG_MAP.has(trimmed) &&
+            (trimmed.includes('=') || // eslint-disable-next-line no-control-regex
+                /[^\x00-\x7F]/.test(trimmed))
+        )
+            return false;
+
+        const normalizedKey = resolveTagKey(trimmed);
+        if (existingFieldKeys.includes(normalizedKey)) {
+            setDuplicateAttempted(true);
+            return false;
+        }
+
+        setDuplicateAttempted(false);
+        setInput('');
+        onAddField(normalizedKey);
+        return true;
+    };
+
+    return (
+        <Group gap="xs">
+            <Autocomplete
+                data={availableFields}
+                error={fieldError}
+                flex={1}
+                onChange={(value) => {
+                    setInput(value);
+                    if (skipNextOnChangeResetRef.current) {
+                        skipNextOnChangeResetRef.current = false;
+                    } else {
+                        setDuplicateAttempted(false);
+                    }
+                }}
+                onKeyDown={(event) => {
+                    if (event.key === 'Enter') {
+                        if (skipNextEnterRef.current) {
+                            skipNextEnterRef.current = false;
+                            return;
+                        }
+                        addField(input);
+                    }
+                }}
+                onOptionSubmit={(value) => {
+                    skipNextEnterRef.current = true;
+                    skipNextOnChangeResetRef.current = true;
+                    const added = addField(value);
+                    if (added) {
+                        queueMicrotask(() => setInput(''));
+                    }
+                }}
+                placeholder={t('page.itemDetail.addField', 'Add field…')}
+                value={input}
+            />
+            <ActionIcon
+                disabled={!!fieldError}
+                icon="add"
+                onClick={() => addField(input)}
+                variant="filled"
+            />
+        </Group>
+    );
+};

src/renderer/features/tag-editor/components/artwork-panel.module.css

@@ -0,0 +1,29 @@
+.artwork-box {
+    width: 100%;
+    aspect-ratio: 1 / 1;
+    container-type: inline-size;
+    overflow: hidden;
+    cursor: pointer;
+    background: var(--mantine-color-dark-6);
+    border: 1px solid var(--mantine-color-default-border);
+    border-radius: var(--mantine-radius-sm);
+}
+
+.artwork-image {
+    width: 100%;
+    height: 100%;
+    object-fit: cover;
+}
+
+.placeholder {
+    height: 100%;
+    opacity: 0.4;
+}
+
+.placeholder-text {
+    font-size: 5cqw;
+}
+
+.remove-button {
+    color: var(--theme-colors-state-error);
+}

src/renderer/features/tag-editor/components/artwork-panel.tsx

@@ -0,0 +1,57 @@
+import styles from './artwork-panel.module.css';
+
+import { Button } from '/@/shared/components/button/button';
+import { DragDropZone } from '/@/shared/components/drag-drop-zone/drag-drop-zone';
+import { Stack } from '/@/shared/components/stack/stack';
+import { Text } from '/@/shared/components/text/text';
+
+interface ArtworkPanelProps {
+    artworkDisplayUrl: null | string;
+    artworkIsMixed: boolean;
+    multipleArtworksLabel: string;
+    noArtworkLabel: string;
+    onApplyBytes: (bytes: Uint8Array, mimeType: string) => void;
+    onBrowse: () => void;
+    onRemove: () => void;
+    removeArtworkLabel: string;
+    showRemoveButton: boolean;
+}
+
+export const ArtworkPanel = ({
+    artworkDisplayUrl,
+    artworkIsMixed,
+    multipleArtworksLabel,
+    noArtworkLabel,
+    onApplyBytes,
+    onBrowse,
+    onRemove,
+    removeArtworkLabel,
+    showRemoveButton,
+}: ArtworkPanelProps) => (
+    <Stack align="center" gap="md" pt="md">
+        <DragDropZone
+            className={styles.artworkBox}
+            mode="file"
+            onClick={onBrowse}
+            onFileSelected={async (file) => {
+                const buf = await file.arrayBuffer();
+                onApplyBytes(new Uint8Array(buf), file.type);
+            }}
+        >
+            {artworkDisplayUrl ? (
+                <img alt="Cover art" className={styles.artworkImage} src={artworkDisplayUrl} />
+            ) : (
+                <Stack align="center" className={styles.placeholder} justify="center">
+                    <Text className={styles.placeholderText}>
+                        {artworkIsMixed ? multipleArtworksLabel : noArtworkLabel}
+                    </Text>
+                </Stack>
+            )}
+        </DragDropZone>
+        {showRemoveButton && (
+            <Button className={styles.removeButton} onClick={onRemove} size="sm" variant="subtle">
+                {removeArtworkLabel}
+            </Button>
+        )}
+    </Stack>
+);

src/renderer/features/tag-editor/components/song-edit-context-modal.tsx

@@ -0,0 +1,52 @@
+import { ContextModalProps } from '@mantine/modals';
+import { useEffect, useState } from 'react';
+
+import { controller } from '/@/renderer/api/controller';
+import { SongEditModal } from '/@/renderer/features/tag-editor/components/song-edit-modal';
+import { useCurrentServer } from '/@/renderer/store';
+import { Spinner } from '/@/shared/components/spinner/spinner';
+import { Stack } from '/@/shared/components/stack/stack';
+import { Song } from '/@/shared/types/domain-types';
+
+type SongEditInnerProps = {
+    albumIds?: string[];
+    songs?: Song[];
+};
+
+export const SongEditContextModal = ({ innerProps }: ContextModalProps<SongEditInnerProps>) => {
+    const server = useCurrentServer();
+    const [resolvedSongs, setResolvedSongs] = useState<null | Song[]>(null);
+
+    useEffect(() => {
+        if (innerProps.albumIds) {
+            if (!server?.id) {
+                setResolvedSongs([]);
+                return;
+            }
+            Promise.all(
+                innerProps.albumIds.map((id) =>
+                    controller.getAlbumDetail({
+                        apiClientProps: { serverId: server.id },
+                        query: { id },
+                    }),
+                ),
+            ).then((albums) => {
+                setResolvedSongs(
+                    albums.flatMap((album) => album?.songs ?? []).filter((s) => s.path),
+                );
+            });
+        } else {
+            setResolvedSongs((innerProps.songs ?? []).filter((s) => s.path));
+        }
+    }, [innerProps.albumIds, innerProps.songs, server?.id]);
+
+    if (resolvedSongs === null) {
+        return (
+            <Stack align="center" p="xl">
+                <Spinner />
+            </Stack>
+        );
+    }
+
+    return <SongEditModal songs={resolvedSongs} />;
+};

src/renderer/features/tag-editor/components/song-edit-modal.module.css

@@ -0,0 +1,22 @@
+.table-scroller {
+    max-height: 55vh;
+    padding-top: var(--theme-spacing-sm);
+    padding-bottom: var(--theme-spacing-sm);
+    margin-top: var(--theme-spacing-sm);
+    overflow-y: auto;
+    border-top: 1px solid var(--mantine-color-default-border);
+}
+
+.table-cell {
+    padding: var(--theme-spacing-xs) var(--theme-spacing-sm);
+    vertical-align: middle;
+}
+
+.table-header {
+    width: 1%;
+    padding: var(--theme-spacing-xs) var(--theme-spacing-sm);
+    font-weight: 500;
+    vertical-align: middle;
+    color: var(--theme-colors-foreground-muted);
+    white-space: nowrap;
+}

src/renderer/features/tag-editor/components/song-edit-modal.tsx

@@ -0,0 +1,177 @@
+import { closeAllModals } from '@mantine/modals';
+import { useRef } from 'react';
+import { useTranslation } from 'react-i18next';
+
+import { useMetadataEditor } from '../hooks/use-metadata-editor';
+import { AddFieldInput } from './add-field-input';
+import { ArtworkPanel } from './artwork-panel';
+import styles from './song-edit-modal.module.css';
+import { TagEditorSettings } from './tag-editor-settings';
+import { TagFieldRow } from './tag-field-row';
+
+import { Button } from '/@/shared/components/button/button';
+import { Checkbox } from '/@/shared/components/checkbox/checkbox';
+import { Group } from '/@/shared/components/group/group';
+import { Spinner } from '/@/shared/components/spinner/spinner';
+import { Stack } from '/@/shared/components/stack/stack';
+import { Table } from '/@/shared/components/table/table';
+import { Tabs } from '/@/shared/components/tabs/tabs';
+import { Text } from '/@/shared/components/text/text';
+import { Song } from '/@/shared/types/domain-types';
+
+export const SongEditModal = ({ songs }: { songs: Song[] }) => {
+    const { t } = useTranslation();
+    const tableContainerRef = useRef<HTMLDivElement>(null);
+
+    const editor = useMetadataEditor({
+        browser: window.api.browser,
+        songs,
+        utils: window.api.utils,
+    });
+
+    const handleAddField = (key: string) => {
+        editor.handleAddField(key);
+        requestAnimationFrame(() => {
+            const row = tableContainerRef.current?.querySelector<HTMLElement>(
+                `[data-field-key="${key}"]`,
+            );
+            row?.scrollIntoView({ block: 'nearest' });
+            row?.querySelector<HTMLElement>('input, textarea')?.focus();
+        });
+    };
+
+    // While loading, shows a spinner
+    if (editor.isLoading) {
+        return (
+            <Stack align="center" gap="xs" p="xl">
+                <Spinner />
+                {editor.loadProgress && editor.loadProgress.total > 1 && (
+                    <Text c="dimmed" size="sm">
+                        {editor.loadProgress.processed} / {editor.loadProgress.total}
+                    </Text>
+                )}
+            </Stack>
+        );
+    }
+
+    // If there was an error loading the metadata, shows the error message
+    if (editor.error) {
+        return (
+            <Stack p="md">
+                <Text c="red">{editor.error}</Text>
+            </Stack>
+        );
+    }
+
+    return (
+        <Stack gap="xs">
+            <Tabs defaultValue="tags" keepMounted={false}>
+                <Tabs.List>
+                    <Tabs.Tab value="tags">{t('page.itemDetail.tagsTab', 'Tags')}</Tabs.Tab>
+                    <Tabs.Tab value="artwork">
+                        {t('page.itemDetail.artworkTab', 'Artwork')}
+                    </Tabs.Tab>
+                    <Tabs.Tab value="settings">{t('common.settings', 'Settings')}</Tabs.Tab>
+                </Tabs.List>
+
+                <Tabs.Panel value="tags">
+                    <Stack gap="xs" pt="xs">
+                        {editor.readWarning && (
+                            <Text c="orange" size="sm">
+                                {editor.readWarning}
+                            </Text>
+                        )}
+                        <AddFieldInput
+                            availableFields={editor.availableToAdd}
+                            existingFieldKeys={editor.sortedFieldEntries.map(([key]) => key)}
+                            onAddField={handleAddField}
+                        />
+                        <div className={styles.tableScroller} ref={tableContainerRef}>
+                            <Table
+                                classNames={{ td: styles.tableCell, th: styles.tableHeader }}
+                                highlightOnHover={false}
+                                withRowBorders
+                            >
+                                <Table.Tbody>
+                                    {editor.sortedFieldEntries.map(([key, value]) => (
+                                        <TagFieldRow
+                                            favoriteValues={editor.favoriteValues[key] ?? []}
+                                            isDirty={
+                                                key in editor.editedFields ||
+                                                editor.removedKeys.has(key)
+                                            }
+                                            isMixed={editor.mixedKeys.has(key)}
+                                            isMultiValue={
+                                                editor.multiValueKeys.has(key) ||
+                                                Array.isArray(value)
+                                            }
+                                            isRemoved={editor.removedKeys.has(key)}
+                                            key={key}
+                                            meta={editor.getFieldMeta(key)}
+                                            mixedPlaceholder={
+                                                editor.mixedKeys.has(key)
+                                                    ? editor.mixedPlaceholder
+                                                    : undefined
+                                            }
+                                            onAddFavorite={(value) =>
+                                                editor.handleAddFavoriteValue(key, value)
+                                            }
+                                            onChange={(v) => editor.handleFieldChange(key, v)}
+                                            onRemove={() => editor.handleRemoveField(key)}
+                                            onReset={() => editor.handleResetField(key)}
+                                            onRevert={() => editor.handleRevertField(key)}
+                                            tagKey={key}
+                                            value={value}
+                                        />
+                                    ))}
+                                </Table.Tbody>
+                            </Table>
+                        </div>
+                    </Stack>
+                </Tabs.Panel>
+
+                <Tabs.Panel value="artwork">
+                    <ArtworkPanel
+                        artworkDisplayUrl={editor.artworkDisplayUrl}
+                        artworkIsMixed={editor.artworkIsMixed}
+                        multipleArtworksLabel={t(
+                            'page.itemDetail.multipleArtworks',
+                            'Multiple Artworks',
+                        )}
+                        noArtworkLabel={t('page.itemDetail.noArtwork', 'No Artwork')}
+                        onApplyBytes={editor.applyArtworkBytes}
+                        onBrowse={editor.handleChangeArtwork}
+                        onRemove={editor.handleRemoveArtwork}
+                        removeArtworkLabel={t('page.itemDetail.removeArtwork', 'Remove Artwork')}
+                        showRemoveButton={editor.showRemoveArtworkButton}
+                    />
+                </Tabs.Panel>
+
+                <Tabs.Panel value="settings">
+                    <TagEditorSettings />
+                </Tabs.Panel>
+            </Tabs>
+
+            <Checkbox
+                checked={editor.rescan}
+                label={t('page.itemDetail.triggerRescan')}
+                onChange={(e) => editor.setRescan(e.currentTarget.checked)}
+            />
+
+            <Group justify="flex-end">
+                <Button
+                    disabled={editor.isSaving}
+                    onClick={() => closeAllModals()}
+                    variant="subtle"
+                >
+                    {t('common.cancel', 'Cancel')}
+                </Button>
+                <Button loading={editor.isSaving} onClick={editor.handleSave} variant="filled">
+                    {editor.isSaving && editor.loadProgress && editor.loadProgress.total > 1
+                        ? `${t('common.save', 'Save')} (${editor.loadProgress.processed}/${editor.loadProgress.total})`
+                        : t('common.save', 'Save')}
+                </Button>
+            </Group>
+        </Stack>
+    );
+};

src/renderer/features/tag-editor/components/tag-editor-settings.tsx

@@ -0,0 +1,119 @@
+import { useState } from 'react';
+import { useTranslation } from 'react-i18next';
+import { RiAddLine, RiCloseLine } from 'react-icons/ri';
+
+import { KNOWN_TAG_MAP, KNOWN_TAGS, resolveTagKey } from '../utils/known-tags';
+
+import { useSettingsStoreActions, useTagEditorSettings } from '/@/renderer/store';
+import { ActionIcon } from '/@/shared/components/action-icon/action-icon';
+import { Autocomplete } from '/@/shared/components/autocomplete/autocomplete';
+import { Fieldset } from '/@/shared/components/fieldset/fieldset';
+import { Group } from '/@/shared/components/group/group';
+import { Stack } from '/@/shared/components/stack/stack';
+import { TagsInput } from '/@/shared/components/tags-input/tags-input';
+import { Text } from '/@/shared/components/text/text';
+
+export const TagEditorSettings = () => {
+    const { t } = useTranslation();
+    const { favoriteValues, multiValueFields } = useTagEditorSettings();
+    const { setSettings } = useSettingsStoreActions();
+    const [input, setInput] = useState('');
+
+    const updateFields = (fields: string[]) => {
+        setSettings({ tagEditor: { multiValueFields: fields } });
+    };
+
+    const updateFavoriteValues = (key: string, values: string[]) => {
+        setSettings({
+            tagEditor: {
+                favoriteValues: { ...favoriteValues, [key]: values },
+            },
+        });
+    };
+
+    const addField = (value: string) => {
+        const trimmed = value.trim();
+        if (!trimmed) return;
+
+        const key = resolveTagKey(trimmed);
+        if (key === 'lyrics' || multiValueFields.includes(key)) {
+            setInput('');
+            return;
+        }
+
+        updateFields([...multiValueFields, key]);
+        setInput('');
+    };
+
+    const availableFields = KNOWN_TAGS.filter(
+        ({ key }) => key !== 'lyrics' && !multiValueFields.includes(key),
+    )
+        .map(({ key, label }) => ({ label, value: key }))
+        .sort((a, b) => a.label.localeCompare(b.label));
+
+    return (
+        <Stack gap="xs">
+            <Text fw={500} size="md">
+                {t('page.itemDetail.multiValueFields')}
+            </Text>
+            <Text isMuted size="sm">
+                {t('page.itemDetail.multiValueFieldsDescription')}
+            </Text>
+            <Autocomplete
+                data={availableFields}
+                onChange={setInput}
+                onKeyDown={(event) => {
+                    if (event.key === 'Enter') {
+                        event.preventDefault();
+                        addField(input);
+                    }
+                }}
+                onOptionSubmit={addField}
+                placeholder={t('page.itemDetail.addMultiValueField')}
+                py="md"
+                rightSection={
+                    <ActionIcon onClick={() => addField(input)} variant="filled">
+                        <RiAddLine size={16} />
+                    </ActionIcon>
+                }
+                rightSectionPointerEvents="all"
+                value={input}
+            />
+            {multiValueFields.map((key) => {
+                const label = KNOWN_TAG_MAP.get(key)?.label ?? key;
+                return (
+                    <Fieldset key={key}>
+                        <Stack gap="xs">
+                            <Group justify="space-between" wrap="nowrap">
+                                <div>
+                                    <Text size="sm">{label}</Text>
+                                    <Text ff="monospace" isMuted size="xs">
+                                        {key}
+                                    </Text>
+                                </div>
+                                <ActionIcon
+                                    aria-label={t('common.remove', 'Remove')}
+                                    onClick={() =>
+                                        updateFields(
+                                            multiValueFields.filter((field) => field !== key),
+                                        )
+                                    }
+                                    variant="subtle"
+                                >
+                                    <RiCloseLine size={16} />
+                                </ActionIcon>
+                            </Group>
+                            <TagsInput
+                                aria-label={`${t('page.itemDetail.favoriteValues')} - ${label}`}
+                                onChange={(values) => updateFavoriteValues(key, values)}
+                                placeholder={t('page.itemDetail.addFavoriteValue')}
+                                splitChars={[]}
+                                value={favoriteValues[key] ?? []}
+                            />
+                        </Stack>
+                    </Fieldset>
+                );
+            })}
+        </Stack>
+    );
+};

src/renderer/features/tag-editor/components/tag-field-row.module.css

@@ -0,0 +1,17 @@
+.remove-cell {
+    width: 32px;
+}
+
+.remove-button {
+    font-size: 1.05rem;
+    line-height: 1;
+}
+
+.dirty-label {
+    box-shadow: inset 2px 0 0 var(--mantine-primary-color-filled);
+}
+
+.removed-row {
+    opacity: 0.55;
+    transition: opacity 0.15s ease-in-out;
+}

src/renderer/features/tag-editor/components/tag-field-row.tsx

@@ -0,0 +1,205 @@
+import type { TagValue } from '/@/shared/types/tag-editor';
+
+import { useMemo, useState } from 'react';
+import { useTranslation } from 'react-i18next';
+
+import type { KnownTag } from '../utils/known-tags';
+
+import styles from './tag-field-row.module.css';
+
+import { ActionIcon } from '/@/shared/components/action-icon/action-icon';
+import { Checkbox } from '/@/shared/components/checkbox/checkbox';
+import { NumberInput } from '/@/shared/components/number-input/number-input';
+import { Table } from '/@/shared/components/table/table';
+import { TagsInput } from '/@/shared/components/tags-input/tags-input';
+import { TextInput } from '/@/shared/components/text-input/text-input';
+import { Textarea } from '/@/shared/components/textarea/textarea';
+
+interface FavoriteTagsInputProps {
+    disabled: boolean;
+    favoriteValues: string[];
+    mixedPlaceholder?: string;
+    onAddFavorite: (value: string) => void;
+    onChange: (value: string[]) => void;
+    value: string[];
+}
+
+interface TagFieldRowProps {
+    favoriteValues: string[];
+    isDirty?: boolean;
+    isMixed: boolean;
+    isMultiValue: boolean;
+    isRemoved: boolean;
+    meta: KnownTag;
+    mixedPlaceholder?: string;
+    onAddFavorite: (value: string) => void;
+    onChange: (value: TagValue) => void;
+    onRemove: () => void;
+    onReset: () => void;
+    onRevert: () => void;
+    tagKey: string;
+    value: TagValue;
+}
+
+const ADD_FAVORITE_PREFIX = '__feishin_add_favorite__:';
+
+const FavoriteTagsInput = ({
+    disabled,
+    favoriteValues,
+    mixedPlaceholder,
+    onAddFavorite,
+    onChange,
+    value,
+}: FavoriteTagsInputProps) => {
+    const { t } = useTranslation();
+    const [searchValue, setSearchValue] = useState('');
+    const candidate = searchValue.trim();
+    const canAddFavorite =
+        candidate.length > 0 &&
+        !favoriteValues.some((favorite) => favorite.toLowerCase() === candidate.toLowerCase());
+    const data = useMemo(
+        () =>
+            canAddFavorite
+                ? [
+                      ...favoriteValues,
+                      {
+                          label: t('page.itemDetail.addFavoriteValueOption', {
+                              value: candidate,
+                          }),
+                          value: `${ADD_FAVORITE_PREFIX}${candidate}`,
+                      },
+                  ]
+                : favoriteValues,
+        [canAddFavorite, candidate, favoriteValues, t],
+    );
+
+    return (
+        <TagsInput
+            clearable
+            data={data}
+            disabled={disabled}
+            onChange={(values) => {
+                const normalizedValues = values.map((item) =>
+                    item.startsWith(ADD_FAVORITE_PREFIX)
+                        ? item.slice(ADD_FAVORITE_PREFIX.length)
+                        : item,
+                );
+                onChange(
+                    normalizedValues.filter(
+                        (item, index) =>
+                            normalizedValues.findIndex(
+                                (other) => other.toLowerCase() === item.toLowerCase(),
+                            ) === index,
+                    ),
+                );
+            }}
+            onOptionSubmit={(submittedValue) => {
+                if (submittedValue.startsWith(ADD_FAVORITE_PREFIX))
+                    onAddFavorite(submittedValue.slice(ADD_FAVORITE_PREFIX.length));
+            }}
+            onSearchChange={setSearchValue}
+            placeholder={mixedPlaceholder}
+            searchValue={searchValue}
+            size="sm"
+            splitChars={[]}
+            value={value}
+        />
+    );
+};
+
+export const TagFieldRow = ({
+    favoriteValues,
+    isDirty,
+    isMixed,
+    isMultiValue,
+    isRemoved,
+    meta,
+    mixedPlaceholder,
+    onAddFavorite,
+    onChange,
+    onRemove,
+    onReset,
+    onRevert,
+    tagKey,
+    value,
+}: TagFieldRowProps) => {
+    const { t } = useTranslation();
+
+    return (
+        <Table.Tr
+            className={isRemoved ? styles.removedRow : undefined}
+            data-field-key={tagKey}
+            key={tagKey}
+        >
+            <Table.Th className={isDirty ? styles.dirtyLabel : undefined}>{meta.label}</Table.Th>
+            <Table.Td>
+                {isMultiValue && tagKey !== 'lyrics' ? (
+                    <FavoriteTagsInput
+                        disabled={isRemoved}
+                        favoriteValues={favoriteValues}
+                        mixedPlaceholder={mixedPlaceholder}
+                        onAddFavorite={onAddFavorite}
+                        onChange={onChange}
+                        value={Array.isArray(value) ? value : value ? [value] : []}
+                    />
+                ) : meta.type === 'textarea' ? (
+                    <Textarea
+                        autosize
+                        disabled={isRemoved}
+                        maxRows={6}
+                        minRows={2}
+                        onChange={(e) => onChange(e.currentTarget.value)}
+                        placeholder={mixedPlaceholder}
+                        size="sm"
+                        value={Array.isArray(value) ? value.join('\n\n') : value}
+                    />
+                ) : meta.type === 'number' ? (
+                    <NumberInput
+                        disabled={isRemoved}
+                        onChange={(v) => onChange(v === undefined ? '' : String(v))}
+                        placeholder={mixedPlaceholder}
+                        size="sm"
+                        value={
+                            isMixed || value === '' || Array.isArray(value)
+                                ? undefined
+                                : Number(value)
+                        }
+                    />
+                ) : meta.type === 'boolean' ? (
+                    <Checkbox
+                        checked={!isMixed && value === '1'}
+                        disabled={isRemoved}
+                        indeterminate={isMixed}
+                        onChange={(e) => onChange(e.currentTarget.checked ? '1' : '0')}
+                        size="sm"
+                    />
+                ) : (
+                    <TextInput
+                        disabled={isRemoved}
+                        onChange={(e) => onChange(e.currentTarget.value)}
+                        placeholder={mixedPlaceholder}
+                        size="sm"
+                        value={Array.isArray(value) ? value.join('; ') : value}
+                    />
+                )}
+            </Table.Td>
+            <Table.Td className={styles.removeCell}>
+                <ActionIcon
+                    aria-label={isRemoved || isDirty ? t('common.undo') : t('common.delete')}
+                    className={styles.removeButton}
+                    icon={isRemoved || isDirty ? 'undo' : 'x'}
+                    iconProps={{
+                        color: isRemoved ? 'error' : 'default',
+                        size: 'md',
+                    }}
+                    onClick={isRemoved ? onReset : isDirty ? onRevert : onRemove}
+                    size="sm"
+                    tooltip={{
+                        label: isRemoved || isDirty ? t('common.undo') : t('common.delete'),
+                    }}
+                    variant="subtle"
+                />
+            </Table.Td>
+        </Table.Tr>
+    );
+};

src/renderer/features/tag-editor/hooks/use-metadata-editor.ts

@@ -0,0 +1,433 @@
+import type {
+    ArtworkKind,
+    ArtworkOp,
+    BatchProgress,
+    TagEditorUtils,
+    TagValue,
+} from '/@/shared/types/tag-editor';
+
+import { closeAllModals } from '@mantine/modals';
+import { useCallback, useEffect, useMemo, useRef, useState } from 'react';
+import { useTranslation } from 'react-i18next';
+
+import { FIELD_PRIORITY, KNOWN_TAG_MAP, KNOWN_TAGS, type KnownTag } from '../utils/known-tags';
+import { base64ToBytes, formatBatchFileErrors } from '../utils/utils';
+
+import { controller } from '/@/renderer/api/controller';
+import { useCurrentServer, useSettingsStoreActions, useTagEditorSettings } from '/@/renderer/store';
+import { resolveSongPath } from '/@/renderer/utils/resolve-song-path';
+import { toast } from '/@/shared/components/toast/toast';
+import { Song } from '/@/shared/types/domain-types';
+
+/**
+ * Subscribes to batch progress events for the duration of `fn`, then unsubscribes.
+ * Ensures the progress handler is always cleaned up even if `fn` throws.
+ */
+const withBatchProgress = async <T>(
+    utils: TagEditorUtils,
+    onProgress: (data: BatchProgress) => void,
+    fn: () => Promise<T>,
+): Promise<T> => {
+    const handler = (_e: unknown, data: BatchProgress) => onProgress(data);
+    utils.onBatchProgress(handler);
+    try {
+        return await fn();
+    } finally {
+        utils.offBatchProgress(handler);
+    }
+};
+
+interface UseMetadataEditorArgs {
+    browser: null | { clearCache: () => Promise<void> };
+    songs?: Song[];
+    utils: TagEditorUtils;
+}
+
+/**
+ * Drives the metadata editor UI: loads song tags from disk, tracks field edits
+ * and artwork changes, and writes them back on save.
+ */
+export const useMetadataEditor = ({ browser, songs: songsProp, utils }: UseMetadataEditorArgs) => {
+    const { t } = useTranslation();
+    const server = useCurrentServer();
+    const { favoriteValues, multiValueFields, triggerRescan } = useTagEditorSettings();
+    const { setSettings } = useSettingsStoreActions();
+
+    const [isLoading, setIsLoading] = useState(true);
+    const [loadProgress, setLoadProgress] = useState<BatchProgress | null>(null);
+    const [error, setError] = useState<null | string>(null);
+    const [readWarning, setReadWarning] = useState<null | string>(null);
+    const [resolvedSongs, setResolvedSongs] = useState<Song[]>([]);
+    const [isSaving, setIsSaving] = useState(false);
+    const [tagSummary, setTagSummary] = useState<Record<string, null | TagValue>>({});
+    const [editedFields, setEditedFields] = useState<Record<string, TagValue>>({});
+    const [parsedMultiValueKeys, setParsedMultiValueKeys] = useState<Set<string>>(new Set());
+    const [removedKeys, setRemovedKeys] = useState<Set<string>>(new Set());
+    const [loadedArtwork, setLoadedArtwork] = useState<{ kind: ArtworkKind }>({ kind: 'none' });
+    const [artworkDisplayUrl, setArtworkDisplayUrl] = useState<null | string>(null);
+    const [artworkOp, setArtworkOp] = useState<ArtworkOp | null>(null);
+
+    const setRescan = useCallback(
+        (value: boolean) => setSettings({ tagEditor: { triggerRescan: value } }),
+        [setSettings],
+    );
+
+    /**
+     * Merges `tagSummary` (on-disk values) and `editedFields` (unsaved edits) into
+     * `displayFields`. Keys present in `tagSummary` with a `null` value (differing
+     * across files) are added to `mixedKeys`. `sortedFieldEntries` applies
+     * `FIELD_PRIORITY` ordering, then alphabetical by label for unlisted keys.
+     */
+    const multiValueKeys = useMemo(
+        () => new Set([...multiValueFields, ...parsedMultiValueKeys]),
+        [multiValueFields, parsedMultiValueKeys],
+    );
+
+    const { displayFields, mixedKeys, sortedFieldEntries } = useMemo(() => {
+        const allKeys = new Set<string>();
+        for (const k of Object.keys(tagSummary)) allKeys.add(k);
+        for (const k of Object.keys(editedFields)) allKeys.add(k);
+
+        const displayFields: Record<string, TagValue> = {};
+        const mixedKeys = new Set<string>();
+
+        for (const key of allKeys) {
+            if (key in editedFields) {
+                displayFields[key] = editedFields[key];
+                continue;
+            }
+            const summaryVal = tagSummary[key];
+            if (summaryVal === null) {
+                mixedKeys.add(key);
+                displayFields[key] = multiValueKeys.has(key) ? [] : '';
+            } else if (summaryVal !== undefined) {
+                displayFields[key] = summaryVal;
+            }
+        }
+
+        const sortedFieldEntries = Object.entries(displayFields).sort(([a], [b]) => {
+            const pa = FIELD_PRIORITY.indexOf(a);
+            const pb = FIELD_PRIORITY.indexOf(b);
+            if (pa !== -1 && pb !== -1) return pa - pb;
+            if (pa !== -1) return -1;
+            if (pb !== -1) return 1;
+            const labelA = KNOWN_TAG_MAP.get(a)?.label ?? a;
+            const labelB = KNOWN_TAG_MAP.get(b)?.label ?? b;
+            return labelA.localeCompare(labelB);
+        });
+
+        return { displayFields, mixedKeys, sortedFieldEntries };
+    }, [tagSummary, editedFields, multiValueKeys]);
+
+    /**
+     * Runs once on mount: reads metadata for all songs in batch and populates
+     * tag summary and initial artwork state.
+     */
+    useEffect(() => {
+        const initialize = async () => {
+            const songs = (songsProp ?? []).filter((s) => s.path);
+
+            if (songs.length === 0) {
+                setError(t('page.itemDetail.noLocalSongs', 'No songs with local file paths found'));
+                setIsLoading(false);
+                return;
+            }
+
+            setResolvedSongs(songs);
+            const paths = songs.map((s) => resolveSongPath(s.path)).filter(Boolean) as string[];
+
+            const batchResult = await withBatchProgress(utils, setLoadProgress, () =>
+                utils.readSongMetadataBatch(paths),
+            );
+
+            if (!batchResult.success || !batchResult.tagSummary) {
+                setError(batchResult.error ?? t('page.itemDetail.fileNotWritable'));
+                setIsLoading(false);
+                return;
+            }
+
+            if (batchResult.failedFiles?.length) {
+                const count = batchResult.failedFiles.length;
+                const total = batchResult.totalCount ?? paths.length;
+                setReadWarning(
+                    t('page.itemDetail.readPartialFailure', {
+                        count,
+                        defaultValue: `Could not read metadata from ${count} of ${total} file(s).`,
+                        total,
+                    }),
+                );
+            }
+
+            setTagSummary(batchResult.tagSummary);
+            setParsedMultiValueKeys(new Set(batchResult.multiValueKeys ?? []));
+
+            if (
+                batchResult.artworkKind === 'common' &&
+                batchResult.artworkData &&
+                batchResult.artworkMimeType
+            ) {
+                setArtworkDisplayUrl(
+                    `data:${batchResult.artworkMimeType};base64,${batchResult.artworkData}`,
+                );
+            }
+            setLoadedArtwork({ kind: batchResult.artworkKind });
+            setIsLoading(false);
+        };
+
+        initialize().catch((err) => {
+            setError(String(err));
+            setIsLoading(false);
+        });
+
+        return () => utils.cancelReadSongMetadata();
+        // eslint-disable-next-line react-hooks/exhaustive-deps
+    }, []);
+
+    /** Records an edited value for `key`, overriding the on-disk summary. */
+    const handleFieldChange = useCallback((key: string, value: TagValue) => {
+        setEditedFields((prev) => ({ ...prev, [key]: value }));
+    }, []);
+
+    const handleAddFavoriteValue = useCallback(
+        (key: string, value: string) => {
+            const trimmed = value.trim();
+            if (!trimmed) return;
+
+            const currentValues = favoriteValues[key] ?? [];
+            if (currentValues.some((favorite) => favorite.toLowerCase() === trimmed.toLowerCase()))
+                return;
+
+            setSettings({
+                tagEditor: {
+                    favoriteValues: {
+                        ...favoriteValues,
+                        [key]: [...currentValues, trimmed],
+                    },
+                },
+            });
+        },
+        [favoriteValues, setSettings],
+    );
+
+    /** Marks `key` for deletion while preserving its displayed value for undo. */
+    const handleRemoveField = useCallback((key: string) => {
+        setRemovedKeys((prev) => new Set(prev).add(key));
+    }, []);
+
+    /** Re-enables a field that was marked for deletion. */
+    const handleResetField = useCallback((key: string) => {
+        setRemovedKeys((prev) => {
+            const next = new Set(prev);
+            next.delete(key);
+            return next;
+        });
+    }, []);
+
+    /** Restores a field to its original on-disk value and removal state. */
+    const handleRevertField = useCallback((key: string) => {
+        setEditedFields((prev) => {
+            const next = { ...prev };
+            delete next[key];
+            return next;
+        });
+        setRemovedKeys((prev) => {
+            const next = new Set(prev);
+            next.delete(key);
+            return next;
+        });
+    }, []);
+
+    // Refs so the functional updater inside handleAddField can see latest values without needing them in the dependency array.
+    const tagSummaryRef = useRef(tagSummary);
+    tagSummaryRef.current = tagSummary;
+    const removedKeysRef = useRef(removedKeys);
+    removedKeysRef.current = removedKeys;
+
+    /** Adds `key` to `editedFields` with an empty value and un-marks it from removal. */
+    const handleAddField = useCallback(
+        (key: null | string) => {
+            if (!key) return;
+            setEditedFields((prev) => {
+                const wasRemoved = removedKeysRef.current.has(key);
+                if (wasRemoved) return prev;
+                const alreadyVisible = (key in tagSummaryRef.current || key in prev) && !wasRemoved;
+                if (alreadyVisible) return prev;
+                return { ...prev, [key]: multiValueKeys.has(key) ? [] : '' };
+            });
+            setRemovedKeys((prev) => {
+                const next = new Set(prev);
+                next.delete(key);
+                return next;
+            });
+        },
+        [multiValueKeys],
+    );
+
+    /** Creates a blob URL from raw image bytes and queues a `set` artwork operation. */
+    const applyArtworkBytes = useCallback((bytes: Uint8Array, mimeType: string) => {
+        const blob = new Blob([bytes.buffer as ArrayBuffer], { type: mimeType });
+        setArtworkDisplayUrl(URL.createObjectURL(blob));
+        setArtworkOp({ bytes, mimeType, type: 'set' });
+    }, []);
+
+    /** Opens a native file picker, reads the selected image, and applies it as the new artwork. */
+    const handleChangeArtwork = useCallback(async () => {
+        const path = await window.api.localSettings.openFileSelector({
+            filters: [{ extensions: ['jpg', 'jpeg', 'png', 'gif', 'webp'], name: 'Images' }],
+        });
+        if (!path) return;
+        const result = await utils.readLocalImage(path);
+        if (result.success && result.data && result.mimeType) {
+            applyArtworkBytes(base64ToBytes(result.data), result.mimeType);
+        }
+    }, [applyArtworkBytes, utils]);
+
+    /** Clears the artwork preview and queues a `clear` artwork operation. */
+    const handleRemoveArtwork = useCallback(() => {
+        setArtworkDisplayUrl(null);
+        setArtworkOp({ type: 'clear' });
+    }, []);
+
+    /** Returns the `KnownTag` descriptor for `key`, falling back to a generic string entry. */
+    const getFieldMeta = useCallback(
+        (key: string): KnownTag => KNOWN_TAG_MAP.get(key) ?? { key, label: key, type: 'string' },
+        [],
+    );
+
+    /**
+     * Validates that no editable fields are empty, writes all tag and artwork
+     * changes to disk in batch, then optionally triggers a server rescan and
+     * closes the modal.
+     */
+    const handleSave = useCallback(async () => {
+        if (resolvedSongs.length === 0) return;
+
+        const activeEdits = Object.fromEntries(
+            Object.entries(editedFields).filter(([key]) => !removedKeys.has(key)),
+        ) as Record<string, TagValue>;
+        const emptyFields = Object.entries(activeEdits)
+            .filter(([key, value]) => {
+                const meta = KNOWN_TAG_MAP.get(key);
+                if (meta?.type === 'boolean') return false;
+                return Array.isArray(value)
+                    ? value.length === 0 || value.some((part) => part.trim() === '')
+                    : value.trim() === '';
+            })
+            .map(([key]) => KNOWN_TAG_MAP.get(key)?.label ?? key);
+
+        if (emptyFields.length > 0) {
+            toast.error({
+                message: `${t('page.itemDetail.emptyFields', 'Fields cannot be empty')}: ${emptyFields.join(', ')}`,
+                title: t('error.generalError', 'Error'),
+            });
+            return;
+        }
+
+        setIsSaving(true);
+        const paths = resolvedSongs.map((s) => resolveSongPath(s.path)).filter(Boolean) as string[];
+
+        try {
+            const writeResult = await withBatchProgress(utils, setLoadProgress, () =>
+                utils.writeSongTagsBatch(
+                    paths,
+                    activeEdits,
+                    [...removedKeys],
+                    artworkOp ?? undefined,
+                ),
+            );
+
+            if (!writeResult.success) {
+                const failed = writeResult.failedFiles ?? [];
+                const message =
+                    failed.length > 0
+                        ? formatBatchFileErrors(
+                              failed,
+                              t('page.itemDetail.writePartialFailure', {
+                                  count: failed.length,
+                                  defaultValue: `Failed to save ${failed.length} file(s).`,
+                              }),
+                          )
+                        : (writeResult.error ?? t('page.itemDetail.fileNotWritable'));
+                toast.error({ message, title: t('error.generalError', 'Error') });
+                return;
+            }
+
+            if (artworkOp) {
+                await browser?.clearCache();
+            }
+
+            if (triggerRescan && server) {
+                try {
+                    await controller.refreshItems({
+                        apiClientProps: { serverId: server.id },
+                        query: { ids: resolvedSongs.map((s) => s.id) },
+                    });
+                } catch {
+                    // non-fatal
+                }
+            }
+
+            closeAllModals();
+        } finally {
+            setLoadProgress(null);
+            setIsSaving(false);
+        }
+    }, [
+        artworkOp,
+        browser,
+        editedFields,
+        removedKeys,
+        resolvedSongs,
+        server,
+        t,
+        triggerRescan,
+        utils,
+    ]);
+
+    /** Known tags not yet present in `displayFields`, sorted alphabetically for the add-field dropdown. */
+    const availableToAdd = useMemo(
+        () =>
+            KNOWN_TAGS.filter((tag) => !(tag.key in displayFields))
+                .map((tag) => ({ label: tag.label, value: tag.key }))
+                .sort((a, b) => a.label.localeCompare(b.label)),
+        [displayFields],
+    );
+
+    const artworkIsMixed = artworkOp === null && loadedArtwork.kind === 'mixed';
+    const showRemoveArtworkButton =
+        artworkOp?.type !== 'clear' && (artworkOp?.type === 'set' || loadedArtwork.kind !== 'none');
+
+    const mixedPlaceholder = t('page.itemDetail.multipleValues', '(Multiple Values)');
+
+    return {
+        applyArtworkBytes,
+        artworkDisplayUrl,
+        artworkIsMixed,
+        availableToAdd,
+        editedFields,
+        error,
+        favoriteValues,
+        getFieldMeta,
+        handleAddFavoriteValue,
+        handleAddField,
+        handleChangeArtwork,
+        handleFieldChange,
+        handleRemoveArtwork,
+        handleRemoveField,
+        handleResetField,
+        handleRevertField,
+        handleSave,
+        isLoading,
+        isSaving,
+        loadProgress,
+        mixedKeys,
+        mixedPlaceholder,
+        multiValueKeys,
+        readWarning,
+        removedKeys,
+        rescan: triggerRescan,
+        setRescan,
+        showRemoveArtworkButton,
+        sortedFieldEntries,
+    };
+};

src/renderer/features/tag-editor/utils/known-tags.ts

@@ -0,0 +1,100 @@
+import { PROPERTIES } from 'taglib-wasm';
+
+/** Tags pinned to the top of the editor table (most frequently edited). */
+export const FIELD_PRIORITY: readonly string[] = [
+    'title',
+    'artist',
+    'album',
+    'albumArtist',
+    'trackNumber',
+    'discNumber',
+    'date',
+];
+
+export interface KnownTag {
+    key: string;
+    label: string;
+    type: TagFieldType;
+}
+
+/** Which form control to render for a tag row. */
+export type TagFieldType = 'boolean' | 'number' | 'string' | 'textarea';
+
+/**
+ * Per-key overrides and extras. Keys present in taglib-wasm PROPERTIES get their
+ * label/type overridden; keys absent from PROPERTIES are appended as extra entries.
+ */
+const TAG_CONFIG: Record<string, { label?: string; type?: TagFieldType }> = {
+    acoustidFingerprint: { type: 'textarea' },
+    acoustidId: { label: 'AcoustID' },
+    albumArtist: { label: 'Album Artist' },
+    albumArtistSort: { label: 'Album Artist Sort' },
+    albumSort: { label: 'Album Sort' },
+    // extras not in PROPERTIES (common MusicBrainz Picard tags)
+    ARTISTS: { label: 'Artists', type: 'string' },
+    artistSort: { label: 'Artist Sort' },
+    bpm: { type: 'number' },
+    catalogNumber: { label: 'Catalog Number' },
+    comment: { type: 'textarea' },
+    composerSort: { label: 'Composer Sort' },
+    discNumber: { label: 'Disc Number' },
+    lyrics: { type: 'textarea' },
+    musicbrainzArtistId: { label: 'MusicBrainz Artist ID' },
+    musicbrainzReleaseArtistId: { label: 'MusicBrainz Album Artist ID' },
+    musicbrainzReleaseGroupId: { label: 'MusicBrainz Release Group ID' },
+    musicbrainzReleaseId: { label: 'MusicBrainz Album ID' },
+    musicbrainzReleaseTrackId: { label: 'MusicBrainz Release Track ID' },
+    musicbrainzTrackId: { label: 'MusicBrainz Track ID' },
+    musicbrainzWorkId: { label: 'MusicBrainz Work ID' },
+    originalAlbum: { label: 'Original Album' },
+    originalArtist: { label: 'Original Artist' },
+    originalDate: { label: 'Original Date' },
+    ORIGINALYEAR: { label: 'Original Year', type: 'number' },
+    RELEASECOUNTRY: { label: 'Release Country', type: 'string' },
+    RELEASESTATUS: { label: 'Release Status', type: 'string' },
+    RELEASETYPE: { label: 'Release Type', type: 'string' },
+    remixedBy: { label: 'Remixer' },
+    titleSort: { label: 'Title Sort' },
+    totalDiscs: { label: 'Total Discs' },
+    totalTracks: { label: 'Total Tracks' },
+    trackNumber: { label: 'Track Number' },
+};
+
+const humanizeKey = (key: string): string =>
+    key
+        .replace(/([A-Z])/g, ' $1')
+        .replace(/^./, (c) => c.toUpperCase())
+        .trim();
+
+/** Field definitions derived from taglib-wasm's PROPERTIES plus any extras in TAG_CONFIG. */
+export const KNOWN_TAGS: KnownTag[] = [
+    ...Object.entries(PROPERTIES).map(([key, prop]) => {
+        const cfg = TAG_CONFIG[key];
+        return {
+            key,
+            label: cfg?.label ?? humanizeKey(key),
+            type: cfg?.type ?? (prop.type as TagFieldType),
+        };
+    }),
+    ...Object.entries(TAG_CONFIG)
+        .filter(([key]) => !(key in PROPERTIES))
+        .map(([key, cfg]) => ({
+            key,
+            label: cfg.label ?? humanizeKey(key),
+            type: cfg.type ?? ('string' as TagFieldType),
+        })),
+];
+
+export const KNOWN_TAG_MAP = new Map(KNOWN_TAGS.map((t) => [t.key, t]));
+
+/**
+ * Resolves a user-typed string to a canonical tag key.
+ * Matches by label first (e.g. "Album Sort" → "albumSort"), then falls back to
+ * the raw input. Unknown keys are uppercased so TagLib writes them as valid
+ * Vorbis comment field names.
+ */
+export const resolveTagKey = (input: string): string => {
+    const byLabel = KNOWN_TAGS.find((t) => t.label.toLowerCase() === input.toLowerCase());
+    const key = byLabel?.key ?? input;
+    return KNOWN_TAG_MAP.has(key) ? key : key.toUpperCase();
+};

src/renderer/features/tag-editor/utils/utils.ts

@@ -0,0 +1,17 @@
+import type { BatchFileError } from '/@/shared/types/tag-editor';
+
+export const base64ToBytes = (base64: string): Uint8Array => {
+    const binary = atob(base64);
+    const bytes = new Uint8Array(binary.length);
+    for (let i = 0; i < binary.length; i++) bytes[i] = binary.charCodeAt(i);
+    return bytes;
+};
+
+export const formatBatchFileErrors = (failed: BatchFileError[], summary: string): string => {
+    const details = failed
+        .slice(0, 3)
+        .map((f) => f.path.split(/[/\\]/).pop() ?? f.path)
+        .join(', ');
+    const suffix = failed.length > 3 ? '…' : '';
+    return `${summary} ${details}${suffix}`;
+};

src/renderer/router/app-router.tsx

@@ -175,9 +175,22 @@ const VisualizerSettingsContextModal = (props: any) => (
     </Suspense>
 );
 
+const LazySongEditContextModal = lazy(() =>
+    import('/@/renderer/features/tag-editor/components/song-edit-context-modal').then((module) => ({
+        default: module.SongEditContextModal,
+    })),
+);
+
+const SongEditContextModal = (props: any) => (
+    <Suspense fallback={<Spinner container />}>
+        <LazySongEditContextModal {...props} />
+    </Suspense>
+);
+
 const appRouterModals = {
     addToPlaylist: AddToPlaylistContextModal,
     base: BaseContextModal,
+    editMetadata: SongEditContextModal,
     lyricsSettings: LyricsSettingsContextModal,
     saveAndReplace: SaveAndReplaceContextModal,
     settings: SettingsContextModal,

src/renderer/store/settings.store.ts

@@ -744,6 +744,12 @@ const AutoDJSettingsSchema = z.object({
     timing: z.number(),
 });
 
+const TagEditorSettingsSchema = z.object({
+    favoriteValues: z.record(z.string(), z.array(z.string())),
+    multiValueFields: z.array(z.string()),
+    triggerRescan: z.boolean(),
+});
+
 /**
  * This schema is used for validation of the imported settings json
  */
@@ -767,6 +773,7 @@ export const ValidationSettingsStateSchema = z.object({
         z.literal('window'),
         z.string(),
     ]),
+    tagEditor: TagEditorSettingsSchema,
     visualizer: VisualizerSettingsSchema,
     window: WindowSettingsSchema,
 });
@@ -1988,6 +1995,11 @@ const initialState: SettingsState = {
         username: 'feishin',
     },
     tab: 'general',
+    tagEditor: {
+        favoriteValues: {},
+        multiValueFields: ['artist', 'albumArtist', 'genre', 'composer', 'lyricist'],
+        triggerRescan: true,
+    },
     visualizer: {
         audiomotionanalyzer: {
             alphaBars: false,
@@ -2677,6 +2689,8 @@ export const useCssSettings = () => useSettingsStore((state) => state.css, shall
 export const useQueryBuilderSettings = () =>
     useSettingsStore((state) => state.queryBuilder, shallow);
 
+export const useTagEditorSettings = () => useSettingsStore((state) => state.tagEditor, shallow);
+
 const getSettingsStoreVersion = () => useSettingsStore.persist.getOptions().version!;
 
 export const useSettingsForExport = (): SettingsState & { version: number } =>

src/shared/api/subsonic/subsonic-types.ts

@@ -347,6 +347,19 @@ const scrobbleParameters = z.object({
 
 const scrobble = z.null();
 
+const scanStatusBody = z.object({
+    count: z.number(),
+    folderCount: z.number(),
+    lastScan: z.string().optional(),
+    scanning: z.boolean(),
+});
+
+const startScanParameters = z.object({});
+const startScan = z.object({ scanStatus: scanStatusBody });
+
+const getScanStatusParameters = z.object({});
+const getScanStatus = z.object({ scanStatus: scanStatusBody });
+
 const search3 = z.object({
     searchResult3: z
         .object({
@@ -907,6 +920,7 @@ export const ssType = {
         getMusicDirectory: getMusicDirectoryParameters,
         getPlaylist: getPlaylistParameters,
         getPlaylists: getPlaylistsParameters,
+        getScanStatus: getScanStatusParameters,
         getSong: getSongParameters,
         getSongsByGenre: getSongsByGenreParameters,
         getStarred: getStarredParameters,
@@ -923,6 +937,7 @@ export const ssType = {
         setRating: setRatingParameters,
         similarSongs: similarSongsParameters,
         similarSongs2: similarSongs2Parameters,
+        startScan: startScanParameters,
         structuredLyrics: structuredLyricsParameters,
         topSongsList: topSongsListParameters,
         updateInternetRadioStation: updateInternetRadioStationParameters,
@@ -956,6 +971,7 @@ export const ssType = {
         getMusicDirectory,
         getPlaylist,
         getPlaylists,
+        getScanStatus,
         getSong,
         getSongsByGenre,
         getStarred,
@@ -981,6 +997,7 @@ export const ssType = {
         similarSongs,
         similarSongs2,
         song,
+        startScan,
         structuredLyrics,
         topSongsList,
         updateInternetRadioStation,

src/shared/components/autocomplete/autocomplete.module.css

@@ -0,0 +1,49 @@
+.root {
+    & [data-disabled='true'] {
+        opacity: 0.6;
+    }
+}
+
+.input {
+    width: 100%;
+    border: 1px solid transparent;
+
+    &[data-variant='default'] {
+        color: var(--theme-colors-surface-foreground);
+        background: var(--theme-colors-surface);
+    }
+
+    &[data-variant='filled'] {
+        color: var(--theme-colors-foreground);
+        background: var(--theme-colors-background);
+    }
+}
+
+.input:focus,
+.input:focus-visible {
+    border-color: lighten(var(--theme-colors-border), 10%);
+}
+
+.label {
+    margin-bottom: var(--theme-spacing-sm);
+}
+
+.section {
+    color: var(--theme-colors-foreground-muted);
+}
+
+.dropdown {
+    padding: var(--theme-spacing-xs);
+    color: var(--theme-colors-surface-foreground);
+    background: var(--theme-colors-surface);
+    border: 1px solid var(--theme-colors-border);
+}
+
+.option {
+    position: relative;
+    padding: var(--theme-spacing-sm) var(--theme-spacing-md);
+}
+
+.option:hover {
+    background: lighten(var(--theme-colors-surface), 5%);
+}

src/shared/components/autocomplete/autocomplete.tsx

@@ -0,0 +1,46 @@
+import type { AutocompleteProps as MantineAutocompleteProps } from '@mantine/core';
+
+import { Autocomplete as MantineAutocomplete } from '@mantine/core';
+import { CSSProperties, forwardRef } from 'react';
+
+import styles from './autocomplete.module.css';
+
+export interface AutocompleteProps extends MantineAutocompleteProps {
+    maxWidth?: CSSProperties['maxWidth'];
+    width?: CSSProperties['width'];
+}
+
+export const Autocomplete = forwardRef<HTMLInputElement, AutocompleteProps>(
+    (
+        {
+            classNames,
+            maxWidth,
+            size = 'sm',
+            style,
+            variant = 'default',
+            width,
+            ...props
+        }: AutocompleteProps,
+        ref,
+    ) => {
+        return (
+            <MantineAutocomplete
+                classNames={{
+                    dropdown: styles.dropdown,
+                    input: styles.input,
+                    label: styles.label,
+                    option: styles.option,
+                    root: styles.root,
+                    section: styles.section,
+                    ...classNames,
+                }}
+                ref={ref}
+                size={size}
+                spellCheck={false}
+                style={{ maxWidth, width, ...style }}
+                variant={variant}
+                {...props}
+            />
+        );
+    },
+);

src/shared/components/icon/icon.tsx

@@ -125,6 +125,7 @@ import {
     LuTimerOff,
     LuTrash,
     LuTriangleAlert,
+    LuUndo2,
     LuUpload,
     LuUser,
     LuUserPen,
@@ -361,6 +362,7 @@ export const AppIcon = {
     themeDark: LuMoon,
     themeLight: LuSun,
     track: LuMusic2,
+    undo: LuUndo2,
     unfavorite: LuHeartCrack,
     unpin: LuPinOff,
     upload: LuUpload,

src/shared/components/tags-input/tags-input.module.css

@@ -0,0 +1,66 @@
+.root {
+    & [data-disabled='true'] {
+        opacity: 0.6;
+    }
+}
+
+.label {
+    margin-bottom: var(--theme-spacing-sm);
+}
+
+.dropdown {
+    padding: var(--theme-spacing-xs);
+    color: var(--theme-colors-surface-foreground);
+    background: var(--theme-colors-surface);
+    border: 1px solid var(--theme-colors-border);
+}
+
+.input {
+    width: 100%;
+    border: 1px solid transparent;
+
+    &[data-variant='default'] {
+        color: var(--theme-colors-surface-foreground);
+        background: var(--theme-colors-surface);
+    }
+
+    &[data-variant='filled'] {
+        color: var(--theme-colors-foreground);
+        background: var(--theme-colors-background);
+
+        & .pill {
+            background: var(--theme-colors-surface);
+        }
+    }
+}
+
+.input:focus-within {
+    border-color: lighten(var(--theme-colors-border), 10%);
+}
+
+.input-field {
+    color: inherit;
+}
+
+.option {
+    position: relative;
+    padding: var(--theme-spacing-sm) var(--theme-spacing-md);
+}
+
+.option:hover {
+    background: lighten(var(--theme-colors-surface), 5%);
+}
+
+.pill {
+    font-size: var(--theme-font-size-sm);
+    background: var(--theme-colors-background);
+    border-radius: var(--theme-radius-sm);
+}
+
+.pills-list {
+    padding-right: var(--theme-spacing-lg);
+}
+
+.clear-button {
+    background: transparent !important;
+}

src/shared/components/tags-input/tags-input.tsx

@@ -0,0 +1,58 @@
+import {
+    TagsInput as MantineTagsInput,
+    TagsInputProps as MantineTagsInputProps,
+} from '@mantine/core';
+import { CSSProperties, useMemo } from 'react';
+
+import styles from './tags-input.module.css';
+
+export interface TagsInputProps extends MantineTagsInputProps {
+    maxWidth?: CSSProperties['maxWidth'];
+    width?: CSSProperties['width'];
+}
+
+const defaultClassNames = {
+    dropdown: styles.dropdown,
+    input: styles.input,
+    inputField: styles.inputField,
+    label: styles.label,
+    option: styles.option,
+    pill: styles.pill,
+    pillsList: styles.pillsList,
+    root: styles.root,
+};
+
+const defaultClearButtonProps = {
+    classNames: {
+        root: styles.clearButton,
+    },
+    variant: 'transparent' as const,
+};
+
+export const TagsInput = ({
+    classNames,
+    maxWidth,
+    variant = 'default',
+    width,
+    ...props
+}: TagsInputProps) => {
+    const mergedClassNames = useMemo(
+        () => (classNames ? { ...defaultClassNames, ...classNames } : defaultClassNames),
+        [classNames],
+    );
+
+    const style = useMemo(
+        () => (maxWidth || width ? { maxWidth, width } : undefined),
+        [maxWidth, width],
+    );
+
+    return (
+        <MantineTagsInput
+            classNames={mergedClassNames}
+            clearButtonProps={defaultClearButtonProps}
+            style={style}
+            variant={variant}
+            {...props}
+        />
+    );
+};

src/shared/components/textarea/textarea.module.css

@@ -1,15 +1,20 @@
 .root {
     transition: width 0.3s ease-in-out;
-
-    &[data-disabled='true'] {
-        opacity: 0.6;
-    }
 }
 
 .input {
-    color: var(--theme-colors-surface-foreground);
-    background: var(--theme-colors-surface);
+    width: 100%;
     border: 1px solid transparent;
+
+    &[data-variant='default'] {
+        color: var(--theme-colors-surface-foreground);
+        background: var(--theme-colors-surface);
+    }
+
+    &[data-variant='filled'] {
+        color: var(--theme-colors-foreground);
+        background: var(--theme-colors-background);
+    }
 }
 
 .input:focus,
@@ -20,3 +25,7 @@
 .label {
     margin-bottom: var(--theme-spacing-sm);
 }
+
+.required {
+    color: var(--theme-colors-state-error);
+}

src/shared/components/textarea/textarea.tsx

@@ -9,7 +9,19 @@ export interface TextareaProps extends MantineTextareaProps {
 }
 
 export const Textarea = forwardRef<HTMLTextAreaElement, TextareaProps>(
-    ({ children, classNames, maxWidth, style, width, ...props }: TextareaProps, ref) => {
+    (
+        {
+            children,
+            classNames,
+            maxWidth,
+            size = 'sm',
+            style,
+            variant = 'default',
+            width,
+            ...props
+        }: TextareaProps,
+        ref,
+    ) => {
         return (
             <MantineTextarea
                 classNames={{
@@ -21,7 +33,10 @@ export const Textarea = forwardRef<HTMLTextAreaElement, TextareaProps>(
                     ...classNames,
                 }}
                 ref={ref}
+                size={size}
+                spellCheck={false}
                 style={{ maxWidth, width, ...style }}
+                variant={variant}
                 {...props}
             >
                 {children}

src/shared/types/domain-types.ts

@@ -1384,6 +1384,10 @@ export type RandomSongListQuery = {
 
 export type RandomSongListResponse = SongListResponse;
 
+export type RefreshItemsArgs = BaseEndpointArgs & { query: { ids: string[] } };
+
+export type RefreshItemsResponse = null;
+
 export type ScrobbleArgs = BaseEndpointArgs & {
     query: ScrobbleQuery;
 };
@@ -1577,6 +1581,7 @@ export type ControllerEndpoint = {
     getUserList?: (args: UserListArgs) => Promise<UserListResponse>;
     jukeboxControl?: (args: JukeboxControlArgs) => Promise<JukeboxControlResponse>;
     movePlaylistItem?: (args: MoveItemArgs) => Promise<void>;
+    refreshItems: (args: RefreshItemsArgs) => Promise<RefreshItemsResponse>;
     removeFromPlaylist: (args: RemoveFromPlaylistArgs) => Promise<RemoveFromPlaylistResponse>;
     replacePlaylist: (args: ReplacePlaylistArgs) => Promise<ReplacePlaylistResponse>;
     savePlayQueue: (args: SaveQueueArgs) => Promise<void>;
@@ -1745,6 +1750,7 @@ export type InternalControllerEndpoint = {
         args: ReplaceApiClientProps<JukeboxControlArgs>,
     ) => Promise<JukeboxControlResponse>;
     movePlaylistItem?: (args: ReplaceApiClientProps<MoveItemArgs>) => Promise<void>;
+    refreshItems: (args: ReplaceApiClientProps<RefreshItemsArgs>) => Promise<RefreshItemsResponse>;
     removeFromPlaylist: (
         args: ReplaceApiClientProps<RemoveFromPlaylistArgs>,
     ) => Promise<RemoveFromPlaylistResponse>;

src/shared/types/tag-editor.ts

@@ -0,0 +1,55 @@
+export type ArtworkKind = 'common' | 'mixed' | 'none';
+
+export type ArtworkOp = { bytes: Uint8Array; mimeType: string; type: 'set' } | { type: 'clear' };
+
+export interface BatchFileError {
+    error: string;
+    path: string;
+}
+
+export interface BatchProgress {
+    processed: number;
+    total: number;
+}
+
+export interface ReadLocalImageResult extends IpcResult {
+    data?: string;
+    mimeType?: string;
+}
+
+export interface ReadSongMetadataBatchResult extends IpcResult {
+    artworkData?: string;
+    artworkKind: ArtworkKind;
+    artworkMimeType?: string;
+    failedFiles?: BatchFileError[];
+    multiValueKeys?: string[];
+    readCount?: number;
+    tagSummary?: Record<string, null | TagValue>;
+    totalCount?: number;
+}
+
+/** Subset of `window.api.utils` consumed by the metadata editor. */
+export interface TagEditorUtils {
+    cancelReadSongMetadata: () => void;
+    offBatchProgress: (cb: (event: unknown, data: BatchProgress) => void) => void;
+    onBatchProgress: (cb: (event: unknown, data: BatchProgress) => void) => void;
+    readLocalImage: (filePath: string) => Promise<ReadLocalImageResult>;
+    readSongMetadataBatch: (filePaths: string[]) => Promise<ReadSongMetadataBatchResult>;
+    writeSongTagsBatch: (
+        filePaths: string[],
+        edits: Record<string, TagValue>,
+        removed: string[],
+        artworkOp?: ArtworkOp,
+    ) => Promise<WriteSongTagsBatchResult>;
+}
+
+export type TagValue = string | string[];
+
+export interface WriteSongTagsBatchResult extends IpcResult {
+    failedFiles?: BatchFileError[];
+}
+
+interface IpcResult {
+    error?: string;
+    success: boolean;
+}

src/shared/utils/image-mime.ts

@@ -0,0 +1,7 @@
+/** Guesses image MIME type from a file path or filename extension. */
+export const getImageMimeTypeFromPath = (filePath: string): string => {
+    if (/\.png$/i.test(filePath)) return 'image/png';
+    if (/\.gif$/i.test(filePath)) return 'image/gif';
+    if (/\.webp$/i.test(filePath)) return 'image/webp';
+    return 'image/jpeg';
+};

src/types/mantine.d.ts

@@ -1,7 +1,8 @@
-import { ActionIconSize, PillVariant } from '@mantine/core';
+import { ActionIconSize, PillVariant, TagsInputVariant } from '@mantine/core';
 
 type ExtendedActionIconSize = 'compact-md' | 'compact-sm' | 'compact-xs' | ActionIconSize;
 type ExtendedPillVariant = 'outline' | PillVariant;
+type ExtendedTagsInputVariant = 'default' | 'filled' | TagsInputVariant;
 
 declare module '@mantine/core' {
     export interface ActionIconProps {
@@ -11,4 +12,8 @@ declare module '@mantine/core' {
     export interface PillProps {
         variant?: ExtendedPillVariant;
     }
+
+    export interface TagsInputProps {
+        variant?: ExtendedTagsInputVariant;
+    }
 }