feat(app): sidebar reveal animation, hover peek overlay, and weaker dividers (#16374)

Co-authored-by: Adam <2363879+adamdotdevin@users.noreply.github.com>

packages/app/e2e/projects/projects-switch.spec.ts

@@ -1,13 +1,7 @@
 import { base64Decode } from "@opencode-ai/util/encode"
+import type { Page } from "@playwright/test"
 import { test, expect } from "../fixtures"
-import {
-  defocus,
-  createTestProject,
-  cleanupTestProject,
-  openSidebar,
-  setWorkspacesEnabled,
-  sessionIDFromUrl,
-} from "../actions"
+import { defocus, createTestProject, cleanupTestProject, openSidebar, sessionIDFromUrl } from "../actions"
 import { projectSwitchSelector, promptSelector, workspaceItemSelector, workspaceNewSessionSelector } from "../selectors"
 import { createSdk, dirSlug, sessionPath } from "../utils"
 
@@ -15,6 +9,37 @@ function slugFromUrl(url: string) {
   return /\/([^/]+)\/session(?:\/|$)/.exec(url)?.[1] ?? ""
 }
 
+async function workspaces(page: Page, directory: string, enabled: boolean) {
+  await page.evaluate(
+    ({ directory, enabled }: { directory: string; enabled: boolean }) => {
+      const key = "opencode.global.dat:layout"
+      const raw = localStorage.getItem(key)
+      const data = raw ? JSON.parse(raw) : {}
+      const sidebar = data.sidebar && typeof data.sidebar === "object" ? data.sidebar : {}
+      const current =
+        sidebar.workspaces && typeof sidebar.workspaces === "object" && !Array.isArray(sidebar.workspaces)
+          ? sidebar.workspaces
+          : {}
+      const next = { ...current }
+
+      if (enabled) next[directory] = true
+      if (!enabled) delete next[directory]
+
+      localStorage.setItem(
+        key,
+        JSON.stringify({
+          ...data,
+          sidebar: {
+            ...sidebar,
+            workspaces: next,
+          },
+        }),
+      )
+    },
+    { directory, enabled },
+  )
+}
+
 test("can switch between projects from sidebar", async ({ page, withProject }) => {
   await page.setViewportSize({ width: 1400, height: 800 })
 
@@ -60,8 +85,11 @@ test("switching back to a project opens the latest workspace session", async ({
       async ({ directory, slug }) => {
         rootDir = directory
         await defocus(page)
+        await workspaces(page, directory, true)
+        await page.reload()
+        await expect(page.locator(promptSelector)).toBeVisible()
         await openSidebar(page)
-        await setWorkspacesEnabled(page, slug, true)
+        await expect(page.getByRole("button", { name: "New workspace" }).first()).toBeVisible()
 
         await page.getByRole("button", { name: "New workspace" }).first().click()