src/components/common/Tooltip.tsx

+import Tippy, { TippyProps } from "@tippyjs/react";
 import styled from "styled-components";
+
+import { Text } from "preact-i18n";
+
 import { Children } from "../../types/Preact";
-import { Position, Tooltip as TooltipCore, TooltipProps } from "react-tippy";
 
-type Props = Omit<TooltipProps, 'html'> & {
-    position?: Position;
+type Props = Omit<TippyProps, "children"> & {
     children: Children;
     content: Children;
+};
+
+export default function Tooltip(props: Props) {
+    const { children, content, ...tippyProps } = props;
+
+    return (
+        <Tippy content={content} {...tippyProps}>
+            {/*
+            // @ts-expect-error Type mis-match. */}
+            <div style={`display: flex;`}>{children}</div>
+        </Tippy>
+    );
 }
 
-const TooltipBase = styled.div`
-    padding: 8px;
-    font-size: 12px;
-    border-radius: 4px;
-    color: var(--foreground);
-    background: var(--secondary-background);
+const PermissionTooltipBase = styled.div`
+    display: flex;
+    align-items: center;
+    flex-direction: column;
+
+    span {
+        font-weight: 700;
+        text-transform: uppercase;
+        color: var(--secondary-foreground);
+        font-size: 11px;
+    }
+
+    code {
+        font-family: var(--monospace-font);
+    }
 `;
 
-export default function Tooltip(props: Props) {
+export function PermissionTooltip(
+    props: Omit<Props, "content"> & { permission: string },
+) {
+    const { permission, ...tooltipProps } = props;
+
     return (
-        <TooltipCore
-            {...props}
-            // @ts-expect-error
-            html={<TooltipBase>{props.content}</TooltipBase>} />
+        <Tooltip
+            content={
+                <PermissionTooltipBase>
+                    <span>
+                        <Text id="app.permissions.required" />
+                    </span>
+                    <code>{permission}</code>
+                </PermissionTooltipBase>
+            }
+            {...tooltipProps}
+        />
     );
 }

src/components/common/UpdateIndicator.tsx

+/* eslint-disable react-hooks/rules-of-hooks */
+import { Download, CloudDownload } from "@styled-icons/boxicons-regular";
+
+import { useContext, useEffect, useState } from "preact/hooks";
+
+import { internalSubscribe } from "../../lib/eventEmitter";
+
+import { ThemeContext } from "../../context/Theme";
+
+import IconButton from "../ui/IconButton";
+
+import { updateSW } from "../../main";
+import Tooltip from "./Tooltip";
+
+let pendingUpdate = false;
+internalSubscribe("PWA", "update", () => (pendingUpdate = true));
+
+interface Props {
+    style: "titlebar" | "channel";
+}
+
+export default function UpdateIndicator({ style }: Props) {
+    const [pending, setPending] = useState(pendingUpdate);
+
+    useEffect(() => {
+        return internalSubscribe("PWA", "update", () => setPending(true));
+    });
+
+    if (!pending) return null;
+    const theme = useContext(ThemeContext);
+
+    if (style === "titlebar") {
+        return (
+            <div class="actions">
+                <Tooltip
+                    content="A new update is available!"
+                    placement="bottom">
+                    <div onClick={() => updateSW(true)}>
+                        <CloudDownload size={22} color={theme.success} />
+                    </div>
+                </Tooltip>
+            </div>
+        );
+    }
+
+    if (window.isNative) return null;
+
+    return (
+        <IconButton onClick={() => updateSW(true)}>
+            <Download size={22} color={theme.success} />
+        </IconButton>
+    );
+}

src/components/common/messaging/Message.tsx

-import Embed from "./embed/Embed";
-import UserIcon from "../user/UserIcon";
-import { Username } from "../user/UserShort";
-import Markdown from "../../markdown/Markdown";
-import { Children } from "../../../types/Preact";
-import Attachment from "./attachments/Attachment";
+import { observer } from "mobx-react-lite";
+import { Message as MessageObject } from "revolt.js/dist/maps/Messages";
+
 import { attachContextMenu } from "preact-context-menu";
-import { useUser } from "../../../context/revoltjs/hooks";
+import { memo } from "preact/compat";
+import { useState } from "preact/hooks";
+
 import { QueuedMessage } from "../../../redux/reducers/queue";
-import { MessageObject } from "../../../context/revoltjs/util";
-import MessageBase, { MessageContent, MessageDetail, MessageInfo } from "./MessageBase";
+
+import { useIntermediate } from "../../../context/intermediate/Intermediate";
+import { useClient } from "../../../context/revoltjs/RevoltClient";
+
 import Overline from "../../ui/Overline";
-import { useContext } from "preact/hooks";
-import { AppContext } from "../../../context/revoltjs/RevoltClient";
+
+import { Children } from "../../../types/Preact";
+import Markdown from "../../markdown/Markdown";
+import UserIcon from "../user/UserIcon";
+import { Username } from "../user/UserShort";
+import MessageBase, {
+    MessageContent,
+    MessageDetail,
+    MessageInfo,
+} from "./MessageBase";
+import Attachment from "./attachments/Attachment";
+import { MessageReply } from "./attachments/MessageReply";
+import Embed from "./embed/Embed";
 
 interface Props {
-    attachContext?: boolean
-    queued?: QueuedMessage
-    message: MessageObject
-    contrast?: boolean
-    content?: Children
-    head?: boolean
+    attachContext?: boolean;
+    queued?: QueuedMessage;
+    message: MessageObject;
+    highlight?: boolean;
+    contrast?: boolean;
+    content?: Children;
+    head?: boolean;
 }
 
-export default function Message({ attachContext, message, contrast, content: replacement, head, queued }: Props) {
-    // TODO: Can improve re-renders here by providing a list
-    // TODO: of dependencies. We only need to update on u/avatar.
-    const user = useUser(message.author);
-    const client = useContext(AppContext);
-
-    const content = message.content as string;
-    return (
-        <MessageBase id={message._id}
-            head={head}
-            contrast={contrast}
-            sending={typeof queued !== 'undefined'}
-            mention={message.mentions?.includes(client.user!._id)}
-            failed={typeof queued?.error !== 'undefined'}
-            onContextMenu={attachContext ? attachContextMenu('Menu', { message, contextualChannel: message.channel, queued }) : undefined}>
-            <MessageInfo>
-                { head ?
-                    <UserIcon target={user} size={36} /> :
-                    <MessageDetail message={message} position="left" /> }
-            </MessageInfo>
-            <MessageContent>
-                { head && <span className="author">
-                    <Username user={user} />
-                    <MessageDetail message={message} position="top" />
-                </span> }
-                { replacement ?? <Markdown content={content} /> }
-                { queued?.error && <Overline type="error" error={queued.error} /> }
-                { message.attachments?.map((attachment, index) =>
-                    <Attachment key={index} attachment={attachment} hasContent={ index > 0 || content.length > 0 } />) }
-                { message.embeds?.map((embed, index) =>
-                    <Embed key={index} embed={embed} />) }
-            </MessageContent>
-        </MessageBase>
-    )
-}
+const Message = observer(
+    ({
+        highlight,
+        attachContext,
+        message,
+        contrast,
+        content: replacement,
+        head: preferHead,
+        queued,
+    }: Props) => {
+        const client = useClient();
+        const user = message.author;
+
+        const { openScreen } = useIntermediate();
+
+        const content = message.content as string;
+        const head =
+            preferHead || (message.reply_ids && message.reply_ids.length > 0);
+
+        // ! TODO: tell fatal to make this type generic
+        // bree: Fatal please...
+        const userContext = attachContext
+            ? (attachContextMenu("Menu", {
+                  user: message.author_id,
+                  contextualChannel: message.channel_id,
+                  // eslint-disable-next-line
+              }) as any)
+            : undefined;
+
+        const openProfile = () =>
+            openScreen({ id: "profile", user_id: message.author_id });
+
+        // ! FIXME(?): animate on hover
+        const [animate, setAnimate] = useState(false);
+
+        return (
+            <div id={message._id}>
+                {message.reply_ids?.map((message_id, index) => (
+                    <MessageReply
+                        key={message_id}
+                        index={index}
+                        id={message_id}
+                        channel={message.channel!}
+                    />
+                ))}
+                <MessageBase
+                    highlight={highlight}
+                    head={
+                        (head &&
+                            !(
+                                message.reply_ids &&
+                                message.reply_ids.length > 0
+                            )) ??
+                        false
+                    }
+                    contrast={contrast}
+                    sending={typeof queued !== "undefined"}
+                    mention={message.mention_ids?.includes(client.user!._id)}
+                    failed={typeof queued?.error !== "undefined"}
+                    onContextMenu={
+                        attachContext
+                            ? attachContextMenu("Menu", {
+                                  message,
+                                  contextualChannel: message.channel_id,
+                                  queued,
+                              })
+                            : undefined
+                    }
+                    onMouseEnter={() => setAnimate(true)}
+                    onMouseLeave={() => setAnimate(false)}>
+                    <MessageInfo>
+                        {head ? (
+                            <UserIcon
+                                target={user}
+                                size={36}
+                                onContextMenu={userContext}
+                                onClick={openProfile}
+                                animate={animate}
+                            />
+                        ) : (
+                            <MessageDetail message={message} position="left" />
+                        )}
+                    </MessageInfo>
+                    <MessageContent>
+                        {head && (
+                            <span className="detail">
+                                <Username
+                                    className="author"
+                                    user={user}
+                                    onContextMenu={userContext}
+                                    onClick={openProfile}
+                                />
+                                <MessageDetail
+                                    message={message}
+                                    position="top"
+                                />
+                            </span>
+                        )}
+                        {replacement ?? <Markdown content={content} />}
+                        {queued?.error && (
+                            <Overline type="error" error={queued.error} />
+                        )}
+                        {message.attachments?.map((attachment, index) => (
+                            <Attachment
+                                key={index}
+                                attachment={attachment}
+                                hasContent={index > 0 || content.length > 0}
+                            />
+                        ))}
+                        {message.embeds?.map((embed, index) => (
+                            <Embed key={index} embed={embed} />
+                        ))}
+                    </MessageContent>
+                </MessageBase>
+            </div>
+        );
+    },
+);
+
+export default memo(Message);

src/components/common/messaging/MessageBase.tsx

-import dayjs from "dayjs";
-import Tooltip from "../Tooltip";
+import { observer } from "mobx-react-lite";
+import { Message } from "revolt.js/dist/maps/Messages";
+import styled, { css, keyframes } from "styled-components";
 import { decodeTime } from "ulid";
+
 import { Text } from "preact-i18n";
-import styled, { css } from "styled-components";
-import { MessageObject } from "../../../context/revoltjs/util";
+
+import { useDictionary } from "../../../lib/i18n";
+
+import { dayjs } from "../../../context/Locale";
+
+import Tooltip from "../Tooltip";
 
 export interface BaseMessageProps {
-    head?: boolean,
-    failed?: boolean,
-    mention?: boolean,
-    blocked?: boolean,
-    sending?: boolean,
-    contrast?: boolean
+    head?: boolean;
+    failed?: boolean;
+    mention?: boolean;
+    blocked?: boolean;
+    sending?: boolean;
+    contrast?: boolean;
+    highlight?: boolean;
 }
 
+const highlight = keyframes`
+    0% { background: var(--mention); }
+    66% { background: var(--mention); }
+    100% { background: transparent; }
+`;
+
 export default styled.div<BaseMessageProps>`
     display: flex;
-    overflow-x: none;
-    padding: .125rem;
+    overflow: none;
+    padding: 0.125rem;
     flex-direction: row;
-    padding-right: 16px;
+    padding-inline-end: 16px;
 
-    ${ props => props.contrast && css`
-        padding: .3rem;
-        border-radius: 4px;
-        background: var(--hover);
-    ` }
+    @media (pointer: coarse) {
+        user-select: none;
+    }
 
-    ${ props => props.head && css`
-        margin-top: 12px;
-    ` }
+    ${(props) =>
+        props.contrast &&
+        css`
+            padding: 0.3rem;
+            background: var(--hover);
+            border-radius: var(--border-radius);
+        `}
 
-    ${ props => props.mention && css`
-        background: var(--mention);
-    ` }
+    ${(props) =>
+        props.head &&
+        css`
+            margin-top: 12px;
+        `}
 
-    ${ props => props.blocked && css`
-        filter: blur(4px);
-        transition: 0.2s ease filter;
+    ${(props) =>
+        props.mention &&
+        css`
+            background: var(--mention);
+        `}
 
-        &:hover {
-            filter: none;
-        }
-    ` }
+    ${(props) =>
+        props.blocked &&
+        css`
+            filter: blur(4px);
+            transition: 0.2s ease filter;
 
-    ${ props => props.sending && css`
-        opacity: 0.8;
-        color: var(--tertiary-foreground);
-    ` }
+            &:hover {
+                filter: none;
+            }
+        `}
 
-    ${ props => props.failed && css`
-        color: var(--error);
-    ` }
+    ${(props) =>
+        props.sending &&
+        css`
+            opacity: 0.8;
+            color: var(--tertiary-foreground);
+        `}
 
-    .author {
+    ${(props) =>
+        props.failed &&
+        css`
+            color: var(--error);
+        `}
+
+    ${(props) =>
+        props.highlight &&
+        css`
+            animation-name: ${highlight};
+            animation-timing-function: ease;
+            animation-duration: 3s;
+        `}
+
+    .detail {
         gap: 8px;
         display: flex;
         align-items: center;
+        flex-shrink: 0;
     }
-    
+
+    .author {
+        overflow: hidden;
+        cursor: pointer;
+        font-weight: 600 !important;
+
+        display: -webkit-box;
+        -webkit-line-clamp: 1;
+        -webkit-box-orient: vertical;
+        text-overflow: ellipsis;
+        white-space: normal;
+
+        &:hover {
+            text-decoration: underline;
+        }
+    }
+
     .copy {
-        width: 0;
-        opacity: 0;
+        display: block;
+        overflow: hidden;
     }
 
     &:hover {
@@ -81,72 +135,125 @@ export const MessageInfo = styled.div`
     flex-direction: row;
     justify-content: center;
 
-    ::selection {
-        background-color: transparent;
-        color: var(--tertiary-foreground);
+    .copyBracket {
+        opacity: 0;
+        position: absolute;
+    }
+
+    .copyTime {
+        opacity: 0;
+        position: absolute;
+    }
+
+    svg {
+        user-select: none;
+        cursor: pointer;
+
+        &:active {
+            transform: translateY(1px);
+        }
     }
 
     time {
         opacity: 0;
+    }
+
+    time,
+    .edited {
+        margin-top: 1px;
         cursor: default;
         display: inline;
         font-size: 10px;
-        padding-top: 1px;
         color: var(--tertiary-foreground);
     }
+
+    time,
+    .edited > div {
+        &::selection {
+            background-color: transparent;
+            color: var(--tertiary-foreground);
+        }
+    }
+
+    .header {
+        cursor: pointer;
+    }
 `;
 
 export const MessageContent = styled.div`
     min-width: 0;
     flex-grow: 1;
     display: flex;
-    overflow: hidden;
-    font-size: 0.875rem;
+    // overflow: hidden;
     flex-direction: column;
     justify-content: center;
+    font-size: var(--text-size);
 `;
 
 export const DetailBase = styled.div`
+    flex-shrink: 0;
     gap: 4px;
     font-size: 10px;
     display: inline-flex;
     color: var(--tertiary-foreground);
+
+    .edited {
+        cursor: default;
+        &::selection {
+            background-color: transparent;
+            color: var(--tertiary-foreground);
+        }
+    }
 `;
 
-export function MessageDetail({ message, position }: { message: MessageObject, position: 'left' | 'top' }) {
-    if (position === 'left') {
-        if (message.edited) {
-            return (
-                <span>
-                    <span className="copy">
-                        [<time>{dayjs(decodeTime(message._id)).format("H:mm")}</time>]
-                    </span>
-                    <Tooltip content={dayjs(message.edited).format("LLLL")}>
-                        <Text id="app.main.channel.edited" />
-                    </Tooltip>
-                </span>
-            )
-        } else {
+export const MessageDetail = observer(
+    ({ message, position }: { message: Message; position: "left" | "top" }) => {
+        const dict = useDictionary();
+
+        if (position === "left") {
+            if (message.edited) {
+                return (
+                    <>
+                        <time className="copyTime">
+                            <i className="copyBracket">[</i>
+                            {dayjs(decodeTime(message._id)).format(
+                                dict.dayjs?.timeFormat,
+                            )}
+                            <i className="copyBracket">]</i>
+                        </time>
+                        <span className="edited">
+                            <Tooltip
+                                content={dayjs(message.edited).format("LLLL")}>
+                                <Text id="app.main.channel.edited" />
+                            </Tooltip>
+                        </span>
+                    </>
+                );
+            }
             return (
                 <>
                     <time>
-                        <i className="copy">[</i>
-                        { dayjs(decodeTime(message._id)).format("H:mm") }
-                        <i className="copy">]</i>
+                        <i className="copyBracket">[</i>
+                        {dayjs(decodeTime(message._id)).format(
+                            dict.dayjs?.timeFormat,
+                        )}
+                        <i className="copyBracket">]</i>
                     </time>
                 </>
-            )
+            );
         }
-    }
 
-    return (
-        <DetailBase>
-            <time>
-                {dayjs(decodeTime(message._id)).calendar()}
-            </time>
-            { message.edited && <Tooltip content={dayjs(message.edited).format("LLLL")}>
-                <Text id="app.main.channel.edited" />
-            </Tooltip> }
-        </DetailBase>
-    )
-}
+        return (
+            <DetailBase>
+                <time>{dayjs(decodeTime(message._id)).calendar()}</time>
+                {message.edited && (
+                    <Tooltip content={dayjs(message.edited).format("LLLL")}>
+                        <span className="edited">
+                            <Text id="app.main.channel.edited" />
+                        </span>
+                    </Tooltip>
+                )}
+            </DetailBase>
+        );
+    },
+);

src/components/common/messaging/attachments/AttachmentActions.module.scss

+.actions.imageAction {
+    grid-template: 
+        "name icon external download" auto
+        "size icon external download" auto
+        / minmax(20px, 1fr) min-content min-content;
+}
+
+.actions {
+    display: grid;
+    grid-template: 
+        "icon name external download" auto
+        "icon size external download" auto
+        / min-content minmax(20px, 1fr) min-content;
+
+    align-items: center;
+    column-gap: 12px;
+    
+    width: 100%;
+    padding: 8px;
+    overflow: none;
+
+    color: var(--foreground);
+    background: var(--secondary-background);
+
+    span {
+        text-overflow: ellipsis;
+        white-space: nowrap;
+        overflow: hidden;
+    }
+    
+    .filesize {
+        grid-area: size;
+
+        font-size: 10px;
+        color: var(--secondary-foreground);
+    }
+
+    .downloadIcon {
+        grid-area: download;
+    }
+
+    .externalType {
+        grid-area: external;
+    }
+
+    .iconType {
+        grid-area: icon;
+    }
+}

src/components/common/messaging/attachments/Grid.tsx

+import styled from "styled-components";
+
+import { Children } from "../../../../types/Preact";
+
+const Grid = styled.div`
+    display: grid;
+    overflow: hidden;
+
+    max-width: min(var(--attachment-max-width), 100%, var(--width));
+    max-height: min(var(--attachment-max-height), var(--height));
+    aspect-ratio: var(--aspect-ratio);
+
+    img,
+    video {
+        min-width: 100%;
+        min-height: 100%;
+
+        width: auto;
+        height: auto;
+
+        max-width: 100%;
+        max-height: 100%;
+
+        grid-area: 1 / 1;
+    }
+
+    &.spoiler {
+        img,
+        video {
+            filter: blur(44px);
+        }
+
+        border-radius: var(--border-radius);
+    }
+`;
+
+export default Grid;
+
+type Props = Omit<
+    JSX.HTMLAttributes<HTMLDivElement>,
+    "children" | "as" | "style"
+> & {
+    style?: JSX.CSSProperties;
+    children?: Children;
+    width: number;
+    height: number;
+};
+
+export function SizedGrid(props: Props) {
+    const { width, height, children, style, ...divProps } = props;
+
+    return (
+        <Grid
+            {...divProps}
+            style={{
+                ...style,
+                "--width": `${width}px`,
+                "--height": `${height}px`,
+                "--aspect-ratio": width / height,
+            }}>
+            {children}
+        </Grid>
+    );
+}