diff --git a/src/api/avatar.js b/src/api/avatar.js
index 9a033b34..419bf5bc 100644
--- a/src/api/avatar.js
+++ b/src/api/avatar.js
@@ -49,7 +49,7 @@ const avatarReq = {
         });
     },
     /**
-     * @param {{ id: string, releaseStatus?: 'public' | 'private', name?: string, description?: string }} params
+     * @param {{ id: string, releaseStatus?: 'public' | 'private', name?: string, description?: string,tags?: string[] }} params
      * @returns {Promise<{json: any, params}>}
      */
     saveAvatar(params) {
diff --git a/src/api/favorite.js b/src/api/favorite.js
index 78ed36e7..7f61ab47 100644
--- a/src/api/favorite.js
+++ b/src/api/favorite.js
@@ -34,12 +34,7 @@ const favoriteReq = {
     },
 
     /**
-     * @param {{
-     *    type: string,
-     *    favoriteId: string (objectId),
-     *    tags: string
-     * }} params
-     * @return { Promise<{json: any, params}> }
+     * @type {import('../types/favorite').addFavorite}
      */
     addFavorite(params) {
         return request('favorites', {
diff --git a/src/api/group.js b/src/api/group.js
index a5c0dbb2..601d2800 100644
--- a/src/api/group.js
+++ b/src/api/group.js
@@ -75,7 +75,7 @@ const groupReq = {
     /**
      *
      * @param {{ groupId: string }} params
-     * @return { Promise<{json: any, params}> }
+     * @return { Promise<{json: any, ref: any, cache?: boolean, params}> }
      */
     getCachedGroup(params) {
         const groupStore = useGroupStore();
diff --git a/src/api/instance.js b/src/api/instance.js
index 5deb5aa2..ac04730b 100644
--- a/src/api/instance.js
+++ b/src/api/instance.js
@@ -52,8 +52,7 @@ const instanceReq = {
     },
 
     /**
-     * @param {{ worldId: string, instanceId: string, shortName: string }} instance
-     * @returns {Promise<{instance, json: T, params: {}}>}
+     * @type {import('../types/instance').getInstanceShortName}
      */
     getInstanceShortName(instance) {
         const params = {};
diff --git a/src/api/misc.js b/src/api/misc.js
index 8d3b900c..de8996f2 100644
--- a/src/api/misc.js
+++ b/src/api/misc.js
@@ -59,7 +59,8 @@ const miscReq = {
     /**
      * @param {{
      *       fileId: string,
-     *       version: number
+     *       version: number,
+     *       variant: string
      * }} params
      * @return { Promise<{json: any, params}> }
      */
diff --git a/src/api/world.js b/src/api/world.js
index fff55ac7..cab5028f 100644
--- a/src/api/world.js
+++ b/src/api/world.js
@@ -3,8 +3,7 @@ import { useWorldStore } from '../stores';
 
 const worldReq = {
     /**
-     * @param {{worldId: string}} params
-     * @returns {Promise<{json: any, params}>}
+     * @type {import('../types/world').getWorld}
      */
     getWorld(params) {
         const worldStore = useWorldStore();
@@ -22,7 +21,7 @@ const worldReq = {
 
     /**
      * @param {{worldId: string}} params
-     * @returns {Promise<{json: any, params}>}
+     * @returns {Promise<{json: any, ref: any, cache?: boolean, params}>}
      */
     getCachedWorld(params) {
         const worldStore = useWorldStore();
diff --git a/src/components/dialogs/AvatarDialog/AvatarDialog.vue b/src/components/dialogs/AvatarDialog/AvatarDialog.vue
index 05800c6f..094c0401 100644
--- a/src/components/dialogs/AvatarDialog/AvatarDialog.vue
+++ b/src/components/dialogs/AvatarDialog/AvatarDialog.vue
@@ -274,7 +274,7 @@
                                 :type="avatarDialog.isBlocked ? 'danger' : 'default'"
                                 icon="el-icon-more"
                                 circle></el-button>
-                            <el-dropdown-menu v-slot="dropdown">
+                            <el-dropdown-menu>
                                 <el-dropdown-item icon="el-icon-refresh" command="Refresh">{{
                                     t('dialog.avatar.actions.refresh')
                                 }}</el-dropdown-item>
@@ -481,7 +481,7 @@
                                                 icon="el-icon-s-order"
                                                 size="mini"
                                                 circle></el-button>
-                                            <el-dropdown-menu v-slot="dropdown">
+                                            <el-dropdown-menu>
                                                 <el-dropdown-item @click.native="copyAvatarId(avatarDialog.id)">{{
                                                     t('dialog.avatar.info.copy_id')
                                                 }}</el-dropdown-item>
@@ -793,7 +793,7 @@
                 showSetAvatarTagsDialog(D.id);
                 break;
             case 'Change Styles and Author Tags':
-                showSetAvatarStylesDialog(D.id);
+                showSetAvatarStylesDialog();
                 break;
             case 'Download Unity Package':
                 openExternalLink(replaceVrcPackageUrl(avatarDialog.value.ref.unityPackageUrl));
@@ -1126,8 +1126,8 @@
             });
             return;
         }
-        miscRequest.getFileAnalysis({ fileId, version, variant, avatarId }).then((args) => {
-            if (!avatarDialog.value.visible || avatarDialog.value.id !== args.params.avatarId) {
+        miscRequest.getFileAnalysis({ fileId, version, variant }).then((args) => {
+            if (!avatarDialog.value.visible || avatarDialog.value.id !== avatarId) {
                 return;
             }
             const ref = args.json;
@@ -1242,8 +1242,9 @@
 
     function onFileChangeAvatarGallery(e) {
         const clearFile = function () {
-            if (document.querySelector('#AvatarGalleryUploadButton')) {
-                document.querySelector('#AvatarGalleryUploadButton').value = '';
+            const fileInput = /** @type {HTMLInputElement} */ (document.querySelector('#AvatarGalleryUploadButton'));
+            if (fileInput) {
+                fileInput.value = '';
             }
         };
         const files = e.target.files || e.dataTransfer.files;
@@ -1270,16 +1271,16 @@
         const r = new FileReader();
         r.onload = function () {
             avatarDialog.value.galleryLoading = true;
-            const base64Body = btoa(r.result);
+            const base64Body = btoa(r.result.toString());
             avatarRequest
                 .uploadAvatarGalleryImage(base64Body, avatarDialog.value.id)
-                .then((args) => {
+                .then(async (args) => {
                     $message({
                         message: t('message.avatar_gallery.uploaded'),
                         type: 'success'
                     });
                     console.log(args);
-                    avatarDialog.value.galleryImages = getAvatarGallery(avatarDialog.value.id);
+                    avatarDialog.value.galleryImages = await getAvatarGallery(avatarDialog.value.id);
                     return args;
                 })
                 .finally(() => {
@@ -1323,12 +1324,12 @@
         } else {
             moveArrayItem(fileIds, index, index + 1);
         }
-        avatarRequest.setAvatarGalleryOrder(fileIds).then((args) => {
+        avatarRequest.setAvatarGalleryOrder(fileIds).then(async (args) => {
             $message({
                 message: t('message.avatar_gallery.reordered'),
                 type: 'success'
             });
-            avatarDialog.value.galleryImages = getAvatarGallery(avatarDialog.value.id);
+            avatarDialog.value.galleryImages = await getAvatarGallery(avatarDialog.value.id);
             return args;
         });
     }
diff --git a/src/components/dialogs/AvatarDialog/ChangeAvatarImageDialog.vue b/src/components/dialogs/AvatarDialog/ChangeAvatarImageDialog.vue
index 1573a30b..0138abae 100644
--- a/src/components/dialogs/AvatarDialog/ChangeAvatarImageDialog.vue
+++ b/src/components/dialogs/AvatarDialog/ChangeAvatarImageDialog.vue
@@ -113,8 +113,9 @@
 
     function onFileChangeAvatarImage(e) {
         const clearFile = function () {
-            if (document.querySelector('#AvatarImageUploadButton')) {
-                document.querySelector('#AvatarImageUploadButton').value = '';
+            const fileInput = /** @type{HTMLInputElement} */ (document.querySelector('#AvatarImageUploadButton'));
+            if (fileInput) {
+                fileInput.value = '';
             }
         };
         const files = e.target.files || e.dataTransfer.files;
@@ -145,10 +146,10 @@
         const r = new FileReader();
         r.onload = async function (file) {
             try {
-                const base64File = await resizeImageToFitLimits(btoa(r.result));
+                const base64File = await resizeImageToFitLimits(btoa(r.result.toString()));
                 // 10MB
                 const fileMd5 = await genMd5(base64File);
-                const fileSizeInBytes = parseInt(file.total, 10);
+                const fileSizeInBytes = parseInt(file.total.toString(), 10);
                 const base64SignatureFile = await genSig(base64File);
                 const signatureMd5 = await genMd5(base64SignatureFile);
                 const signatureSizeInBytes = parseInt(await genLength(base64SignatureFile), 10);
@@ -237,7 +238,7 @@
 
         if (json.status !== 200) {
             changeAvatarImageDialogLoading.value = false;
-            $throw('Avatar image upload failed', json, params.url);
+            $throw(json.status, 'Avatar image upload failed', params.url);
         }
         const args = {
             json,
@@ -290,7 +291,7 @@
 
         if (json.status !== 200) {
             changeAvatarImageDialogLoading.value = false;
-            $throw('Avatar image upload failed', json, params.url);
+            $throw(json.status, 'Avatar image upload failed', params.url);
         }
         const args = {
             json,
diff --git a/src/components/dialogs/GalleryDialog.vue b/src/components/dialogs/GalleryDialog.vue
index c8353419..1003ffda 100644
--- a/src/components/dialogs/GalleryDialog.vue
+++ b/src/components/dialogs/GalleryDialog.vue
@@ -557,8 +557,9 @@
 
     function onFileChangeGallery(e) {
         const clearFile = function () {
-            if (document.querySelector('#GalleryUploadButton')) {
-                document.querySelector('#GalleryUploadButton').value = '';
+            const fileInput = /** @type {HTMLInputElement} */ (document.querySelector('#GalleryUploadButton'));
+            if (fileInput) {
+                fileInput.value = '';
             }
         };
         const files = e.target.files || e.dataTransfer.files;
@@ -584,7 +585,7 @@
         }
         const r = new FileReader();
         r.onload = function () {
-            const base64Body = btoa(r.result);
+            const base64Body = btoa(r.result.toString());
             vrcPlusImageRequest.uploadGalleryImage(base64Body).then((args) => {
                 handleGalleryImageAdd(args);
                 proxy.$message({
@@ -655,8 +656,9 @@
 
     function onFileChangeVRCPlusIcon(e) {
         const clearFile = function () {
-            if (document.querySelector('#VRCPlusIconUploadButton')) {
-                document.querySelector('#VRCPlusIconUploadButton').value = '';
+            const fileInput = /** @type {HTMLInputElement} */ (document.querySelector('#VRCPlusIconUploadButton'));
+            if (fileInput) {
+                fileInput.value = '';
             }
         };
         const files = e.target.files || e.dataTransfer.files;
@@ -682,7 +684,7 @@
         }
         const r = new FileReader();
         r.onload = function () {
-            const base64Body = btoa(r.result);
+            const base64Body = btoa(r.result.toString());
             vrcPlusIconRequest.uploadVRCPlusIcon(base64Body).then((args) => {
                 if (Object.keys(VRCPlusIconsTable.value).length !== 0) {
                     VRCPlusIconsTable.value.unshift(args.json);
@@ -777,8 +779,9 @@
 
     function onFileChangeEmoji(e) {
         const clearFile = function () {
-            if (document.querySelector('#EmojiUploadButton')) {
-                document.querySelector('#EmojiUploadButton').value = '';
+            const fileInput = /** @type {HTMLInputElement} */ (document.querySelector('#EmojiUploadButton'));
+            if (fileInput) {
+                fileInput.value = '';
             }
         };
         const files = e.target.files || e.dataTransfer.files;
@@ -818,10 +821,10 @@
             if (emojiAnimLoopPingPong.value) {
                 params.loopStyle = 'pingpong';
             }
-            const base64Body = btoa(r.result);
+            const base64Body = btoa(r.result.toString());
             vrcPlusImageRequest.uploadEmoji(base64Body, params).then((args) => {
-                if (Object.keys(emojiTable).length !== 0) {
-                    emojiTable.unshift(args.json);
+                if (Object.keys(emojiTable.value).length !== 0) {
+                    emojiTable.value.unshift(args.json);
                 }
                 proxy.$message({
                     message: t('message.emoji.uploaded'),
@@ -873,8 +876,9 @@
 
     function onFileChangeSticker(e) {
         const clearFile = function () {
-            if (document.querySelector('#StickerUploadButton')) {
-                document.querySelector('#StickerUploadButton').value = '';
+            const fileInput = /** @type {HTMLInputElement} */ (document.querySelector('#StickerUploadButton'));
+            if (fileInput) {
+                fileInput.value = '';
             }
         };
         const files = e.target.files || e.dataTransfer.files;
@@ -904,7 +908,7 @@
                 tag: 'sticker',
                 maskTag: 'square'
             };
-            const base64Body = btoa(r.result);
+            const base64Body = btoa(r.result.toString());
             vrcPlusImageRequest.uploadSticker(base64Body, params).then((args) => {
                 handleStickerAdd(args);
                 proxy.$message({
@@ -939,8 +943,9 @@
 
     function onFileChangePrint(e) {
         const clearFile = function () {
-            if (document.querySelector('#PrintUploadButton')) {
-                document.querySelector('#PrintUploadButton').value = '';
+            const fileInput = /** @type {HTMLInputElement} */ (document.querySelector('#PrintUploadButton'));
+            if (fileInput) {
+                fileInput.value = '';
             }
         };
         const files = e.target.files || e.dataTransfer.files;
@@ -975,7 +980,7 @@
                 // worldId: '',
                 timestamp
             };
-            const base64Body = btoa(r.result);
+            const base64Body = btoa(r.result.toString());
             const cropWhiteBorder = printCropBorder.value;
             vrcPlusImageRequest.uploadPrint(base64Body, cropWhiteBorder, params).then((args) => {
                 proxy.$message({
diff --git a/src/components/dialogs/GroupDialog/GallerySelectDialog.vue b/src/components/dialogs/GroupDialog/GallerySelectDialog.vue
index 1cc4c558..5ba75041 100644
--- a/src/components/dialogs/GroupDialog/GallerySelectDialog.vue
+++ b/src/components/dialogs/GroupDialog/GallerySelectDialog.vue
@@ -84,8 +84,9 @@
 
     function onFileChangeGallery(e) {
         const clearFile = function () {
-            if (document.querySelector('#GalleryUploadButton')) {
-                document.querySelector('#GalleryUploadButton').value = '';
+            const fileInput = /** @type{HTMLInputElement} */ (document.querySelector('#GalleryUploadButton'));
+            if (fileInput) {
+                fileInput.value = '';
             }
         };
         const files = e.target.files || e.dataTransfer.files;
@@ -111,7 +112,7 @@
         }
         const r = new FileReader();
         r.onload = function () {
-            const base64Body = btoa(r.result);
+            const base64Body = btoa(r.result.toString());
             vrcPlusImageRequest.uploadGalleryImage(base64Body).then((args) => {
                 handleGalleryImageAdd(args);
                 $message({
diff --git a/src/components/dialogs/VRCXUpdateDialog.vue b/src/components/dialogs/VRCXUpdateDialog.vue
index 1aba1838..39bf3271 100644
--- a/src/components/dialogs/VRCXUpdateDialog.vue
+++ b/src/components/dialogs/VRCXUpdateDialog.vue
@@ -90,7 +90,7 @@
     watch(
         () => VRCXUpdateDialog,
         (newVal) => {
-            if (newVal.visible) {
+            if (newVal.value.visible) {
                 nextTick(() => {
                     adjustDialogZ(VRCXUpdateDialogRef.value.$el);
                 });
diff --git a/src/types/favorite.d.ts b/src/types/favorite.d.ts
index 63217188..96d88294 100644
--- a/src/types/favorite.d.ts
+++ b/src/types/favorite.d.ts
@@ -3,15 +3,6 @@ export type getFavorites = (params: { n: number; offset: number }) => Promise<{
     params: { n: number; offset: number };
 }>;
 
-interface getFavoritesResponseItem {
-    favoriteId: string;
-    id: string;
-    tags: string[];
-    type: 'world' | 'friend' | 'avatar';
-}
-
-type getFavoritesResponseList = getFavoritesResponseItem[] | undefined;
-
 export type getFavoriteAvatars = (params: {
     n: number;
     offset: number;
@@ -21,6 +12,36 @@ export type getFavoriteAvatars = (params: {
     params: { n: number; offset: number; tag: string };
 }>;
 
+export type getFavoriteWorlds = (params: {
+    n: number;
+    offset: number;
+}) => Promise<{
+    json: getFavoriteWorldsResponseList;
+    params: { n: number; offset: number };
+}>;
+
+export type addFavorite = (params: {
+    type: string;
+    favoriteId: string;
+    tags: string;
+}) => Promise<{
+    json: addFavoriteResponse;
+    params: {
+        type: string;
+        favoriteId: string;
+        tags: string;
+    };
+}>;
+
+interface getFavoritesResponseItem {
+    favoriteId: string;
+    id: string;
+    tags: string[];
+    type: string;
+}
+
+type getFavoritesResponseList = getFavoritesResponseItem[] | undefined;
+
 interface UnityPackage {
     assetVersion: number;
     created_at: string;
@@ -46,7 +67,7 @@ interface Styles {
     secondary: null;
 }
 
-interface AvatarFavoriteItem {
+interface getFavoriteAvatarsResponseItem {
     acknowledgements?: null | string;
     authorId: string;
     authorName: string;
@@ -73,14 +94,6 @@ interface AvatarFavoriteItem {
 
 type getFavoriteAvatarsResponseList = getFavoriteAvatarsResponseItem[];
 
-export type getFavoriteWorlds = (params: {
-    n: number;
-    offset: number;
-}) => Promise<{
-    json: getFavoriteWorldsResponseList;
-    params: { n: number; offset: number };
-}>;
-
 interface getFavoriteWorldsResponseItem {
     id: string;
     name: string;
@@ -109,3 +122,10 @@ interface getFavoriteWorldsResponseItem {
 }
 
 type getFavoriteWorldsResponseList = getFavoriteWorldsResponseItem[];
+
+interface addFavoriteResponse {
+    favoriteId: string;
+    id: string;
+    type: 'world' | 'friend' | 'avatar';
+    tags: string[];
+}
diff --git a/src/types/globals.d.ts b/src/types/globals.d.ts
index eaab56b1..c5ad0bef 100644
--- a/src/types/globals.d.ts
+++ b/src/types/globals.d.ts
@@ -79,37 +79,6 @@ declare global {
         };
     }
 
-    declare const API: {
-        // HTTP request methods
-        $bulk: (options: any, args?: any) => Promise<any>;
-        bulk: (options: any) => Promise<any>;
-
-        // Event system
-        $emit: (event: string, ...args: any[]) => void;
-        $off: (event: string, handler?: Function) => void;
-        $on: (event: string, handler: Function) => void;
-
-        // Debug functions
-        debug: boolean | ((message: any) => void);
-        debugCurrentUserDiff: boolean | ((data: any) => void);
-        debugFriendState: boolean | ((data: any) => void);
-        debugGameLog: boolean | ((data: any) => void);
-        debugPhotonLogging: boolean | ((data: any) => void);
-        debugUserDiff: boolean | ((data: any) => void);
-        debugWebRequests: boolean | ((data: any) => void);
-        debugWebSocket: boolean | ((data: any) => void);
-
-        // Configuration
-        dontLogMeOut: boolean;
-        endpointDomain: string;
-        endpointDomainVrchat: string;
-        websocketDomain: string;
-        websocketDomainVrchat: string;
-
-        // Error handling
-        errorNoty: (error: any) => void;
-    };
-
     const CefSharp: {
         PostMessage: (message: any) => void;
         BindObjectAsync: (...args: string[]) => Promise<any>;
@@ -419,11 +388,37 @@ declare global {
         setCookies(cookie: string): Promise<void>;
         execute(options: {
             url: string;
-            method: string;
+            method?: string;
+            uploadFilePUT?: boolean;
+            fileData?: string;
+            fileMIME?: string;
             headers?: Record<string, string>;
             data?: any;
         }): Promise<{ status: number; data: string }>;
     };
+
+    const electron: {
+        openFileDialog: () => Promise<string>;
+        openDirectoryDialog: () => Promise<string>;
+        desktopNotification: (
+            displayName: string,
+            body?: string,
+            image?: string
+        ) => Promise<void>;
+        onWindowPositionChanged: (
+            Function: (event: any, position: { x: number; y: number }) => void
+        ) => void;
+        onWindowSizeChanged: (
+            Function: (
+                event: any,
+                size: { width: number; height: number }
+            ) => void
+        ) => void;
+        onWindowStateChange: (
+            Function: (event: any, state: { windowState: any }) => void
+        ) => void;
+        restartApp: () => Promise<void>;
+    };
 }
 
 export {};
diff --git a/src/types/group.d.ts b/src/types/group.d.ts
index 31eac231..e41f9d82 100644
--- a/src/types/group.d.ts
+++ b/src/types/group.d.ts
@@ -1,9 +1,9 @@
 export type getGroup = (params: {
     groupId: string;
-    includeRoles: boolean;
+    includeRoles?: boolean;
 }) => Promise<{
     json: getGroupResponse;
-    params: { groupId: string; includeRoles: boolean };
+    params: { groupId: string; includeRoles?: boolean };
 }>;
 
 interface Group {
diff --git a/src/types/instance.d.ts b/src/types/instance.d.ts
index 4e6cea80..6b7257c9 100644
--- a/src/types/instance.d.ts
+++ b/src/types/instance.d.ts
@@ -6,6 +6,16 @@ export type getInstance = (params: {
     params: { worldId: string; instanceId: string };
 }>;
 
+export type getInstanceShortName = (instance: {
+    worldId: string;
+    instanceId: string;
+    shortName?: string;
+}) => Promise<{
+    json: getInstanceShortNameResponse;
+    instance: { worldId: string; instanceId: string };
+    params?: { shortName: string };
+}>;
+
 interface getInstanceResponse {
     active: boolean;
     ageGate: boolean;
@@ -91,3 +101,8 @@ interface WorldUnityPackage {
     unityVersion: string;
     worldSignature: string;
 }
+
+interface getInstanceShortNameResponse {
+    secureName: string;
+    shortName: string;
+}
diff --git a/src/types/world.d.ts b/src/types/world.d.ts
new file mode 100644
index 00000000..abbe2f09
--- /dev/null
+++ b/src/types/world.d.ts
@@ -0,0 +1,51 @@
+export type getWorld = (params: { worldId: string }) => Promise<{
+    json: getWorldResponse;
+    params: { worldId: string };
+}>;
+
+interface getWorldResponse {
+    authorId: string;
+    authorName: string;
+    capacity: number;
+    created_at: string;
+    defaultContentSettings: Record<string, unknown>;
+    description: string;
+    favorites: number;
+    featured: boolean;
+    heat: number;
+    id: string;
+    imageUrl: string;
+    instances: any[];
+    labsPublicationDate: string;
+    name: string;
+    occupants: number;
+    organization: string;
+    popularity: number;
+    previewYoutubeId: string | null;
+    privateOccupants: number;
+    publicOccupants: number;
+    publicationDate: string;
+    recommendedCapacity: number;
+    releaseStatus: string;
+    tags: string[];
+    thumbnailImageUrl: string;
+    udonProducts: any[];
+    unityPackages: UnityPackage[];
+    updated_at: string;
+    urlList: any[];
+    version: number;
+    visits: number;
+}
+
+interface UnityPackage {
+    assetUrl: string;
+    assetUrlObject: Record<string, unknown>;
+    assetVersion: number;
+    created_at: string;
+    id: string;
+    platform: string;
+    pluginUrl: string;
+    pluginUrlObject: Record<string, unknown>;
+    unitySortNumber: number;
+    unityVersion: string;
+}