feat: sidebar tabs support (#6213)

* feat: Sidebar tabs support [wip]

* tab trigger styling tweaks

* add `:hover` & `:active` states

* replace `@dwelle/tunnel-rat` with `tunnel-rat`

* make stuff more explicit

- remove `Sidebar.Header` fallback (host apps need to render manually), and stop tunneling it (render in place)
- make `docked` state explicit
- stop tunneling `Sidebar.TabTriggers` (render in place)

* redesign sidebar / library as per latest spec

* support no label on `Sidebar.Trigger`

* add Sidebar `props.onStateChange`

* style fixes

* make `appState.isSidebarDocked` into a soft user preference

* px -> rem & refactor

* remove `props.renderSidebar`

* update tests

* remove

* refactor

* rename constants

* tab triggers styling fixes

* factor out library-related logic from generic sidebar trigger

* change `props.onClose` to `onToggle`

* rename `props.value` -> `props.tab`

* add displayNames

* allow HTMLAttributes on applicable compos

* fix example App

* more styling tweaks and fixes

* fix not setting `dockable`

* more style fixes

* fix and align sidebar header button styling

* make DefaultSidebar dockable on if host apps supplies `onDock`

* stop `Sidebar.Trigger` hiding label on mobile

this should be only the default sidebar trigger behavior, and for that we don't need to use `device` hook as we handle in CSS

* fix `dockable` prop of defaultSidebar

* remove extra `typescript` dep

* remove `defaultTab` prop

in favor of explicit `tab` value in `<Sidebar.Trigger/>` and `toggleSidebar()`, to reduce API surface area and solve inconsistency of `appState.openSidebar.tab` not reflecting actual UI value if `defaultTab` was supported (without additional syncing logic which feels like the wrong solution).

* remove `onToggle` in favor of `onStateChange`

reducing API surface area

* fix restore

* comment no longer applies

* reuse `Button` component in sidebar buttons

* fix tests

* split Sidebar sub-components into files

* remove `props.dockable` in favor of `props.onDock` only

* split tests

* fix sidebar showing dock button if no `props.docked` supplied & add more tests

* reorder and group sidebar tests

* clarify

* rename classes & dedupe css

* refactor tests

* update changelog

* update changelog

---------

Co-authored-by: barnabasmolnar <barnabas@excalidraw.com>

src/components/MobileMenu.tsx

@@ -13,13 +13,12 @@ import { SelectedShapeActions, ShapesSwitcher } from "./Actions";
 import { Section } from "./Section";
 import { SCROLLBAR_WIDTH, SCROLLBAR_MARGIN } from "../scene/scrollbars";
 import { LockButton } from "./LockButton";
-import { LibraryButton } from "./LibraryButton";
 import { PenModeButton } from "./PenModeButton";
 import { Stats } from "./Stats";
 import { actionToggleStats } from "../actions";
 import { HandButton } from "./HandButton";
 import { isHandToolActive } from "../appState";
-import { useTunnels } from "./context/tunnels";
+import { useTunnels } from "../context/tunnels";
 
 type MobileMenuProps = {
   appState: AppState;
@@ -60,11 +59,15 @@ export const MobileMenu = ({
   device,
   renderWelcomeScreen,
 }: MobileMenuProps) => {
-  const { welcomeScreenCenterTunnel, mainMenuTunnel } = useTunnels();
+  const {
+    WelcomeScreenCenterTunnel,
+    MainMenuTunnel,
+    DefaultSidebarTriggerTunnel,
+  } = useTunnels();
   const renderToolbar = () => {
     return (
       <FixedSideContainer side="top" className="App-top-bar">
-        {renderWelcomeScreen && <welcomeScreenCenterTunnel.Out />}
+        {renderWelcomeScreen && <WelcomeScreenCenterTunnel.Out />}
         <Section heading="shapes">
           {(heading: React.ReactNode) => (
             <Stack.Col gap={4} align="center">
@@ -88,11 +91,7 @@ export const MobileMenu = ({
                 {renderTopRightUI && renderTopRightUI(true, appState)}
                 <div className="mobile-misc-tools-container">
                   {!appState.viewModeEnabled && (
-                    <LibraryButton
-                      appState={appState}
-                      setAppState={setAppState}
-                      isMobile
-                    />
+                    <DefaultSidebarTriggerTunnel.Out />
                   )}
                   <PenModeButton
                     checked={appState.penMode}
@@ -132,14 +131,14 @@ export const MobileMenu = ({
     if (appState.viewModeEnabled) {
       return (
         <div className="App-toolbar-content">
-          <mainMenuTunnel.Out />
+          <MainMenuTunnel.Out />
         </div>
       );
     }
 
     return (
       <div className="App-toolbar-content">
-        <mainMenuTunnel.Out />
+        <MainMenuTunnel.Out />
         {actionManager.renderAction("toggleEditMenu")}
         {actionManager.renderAction("undo")}
         {actionManager.renderAction("redo")}
@@ -190,7 +189,7 @@ export const MobileMenu = ({
             {renderAppToolbar()}
             {appState.scrolledOutside &&
               !appState.openMenu &&
-              appState.openSidebar !== "library" && (
+              !appState.openSidebar && (
                 <button
                   className="scroll-back-to-content"
                   onClick={() => {