fix(app): show the pointer cursor on Work's mount buttons

Both ways into the Mount project dialog from the sidebar looked unclickable:
the icon button beside Projects and the prompt shown while a sandbox has no
folders both kept the arrow cursor on hover.

The icon button needs the important modifier. icon-button-v2.css sets
`cursor: default` on every icon button, and that file is unlayered while
Tailwind's utilities live in @layer utilities — unlayered CSS wins over any
layered rule regardless of specificity, so a plain `cursor-pointer` would have
been silently dropped. `enabled:` keeps the disabled state on the not-allowed
cursor the variant already gives it, which is what the button shows while its
sandbox is unhealthy. The prompt is a plain button with no component CSS
competing, so it needs no modifier.

Work only: this is the button that mounts a host folder into the sandbox. The
same element on Code is upstream's Add project, which is left alone.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: quickbeard

packages/app/src/components/app-sidebar.tsx

@@ -117,7 +117,16 @@ export function AppSidebar(props: { class?: string; debugTools?: { visible: bool
                 data-action={side() === "work" ? "work-mount-project" : "home-add-project"}
                 variant="ghost-muted"
                 size="large"
-                class="titlebar-icon [&_[data-slot=icon-svg]]:text-v2-icon-icon-muted"
+                class={`titlebar-icon [&_[data-slot=icon-svg]]:text-v2-icon-icon-muted${
+                  // Fork: icon-button-v2.css sets cursor: default on every icon
+                  // button, and Tailwind utilities sit in @layer utilities, so
+                  // the unlayered component rule wins without the important
+                  // modifier. `enabled:` leaves the disabled state on the
+                  // not-allowed cursor the variant already gives it. Work only:
+                  // this is the button that mounts a folder into the sandbox,
+                  // and Code's Add project is upstream's, untouched.
+                  side() === "work" ? " enabled:cursor-pointer!" : ""
+                }`}
                 icon={<IconV2 name="folder-add-left" />}
                 disabled={global.servers.health[ServerConnection.key(sideServers()[0]!)]?.healthy === false}
                 onClick={() => {

packages/app/src/sandbox/mount-prompt.tsx

@@ -18,7 +18,7 @@ export function SandboxMountPrompt(props: { server: ServerConnection.Any }) {
       <button
         type="button"
         data-action="sandbox-mount-prompt"
-        class="flex items-center gap-1.5 text-12-medium text-v2-text-text-base underline [&>[data-slot=icon-svg]]:text-v2-icon-icon-muted"
+        class="flex cursor-pointer items-center gap-1.5 text-12-medium text-v2-text-text-base underline [&>[data-slot=icon-svg]]:text-v2-icon-icon-muted"
         onClick={() => {
           // Lazy, like every other route to this dialog: it is desktop-only and
           // pulls the whole mounts editor in with it.