Quick-create issue modal (C / ⌘K / "+" anywhere) with inline property pills and "Create more"

Part of PAR-357. Needs the controlled Dialog from the design-system primitives task.

Problem

• Full page only. Creating an issue is a 560px standalone page (ui/app/(app)/w/[workspace]/issues/new/page.tsx). You lose your context every time.
• Awkward layout. Team and Priority come first, then Title, then a plain textarea. Assignee, project, due date, parent, sprint and labels are hidden in a collapsed "Assignment, project and other properties" disclosure (:127-176). Create and Cancel are stacked vertically (:180-186).
• Every entry point navigates to that page. The board's "New issue" links and the palette's "New issue" (lib/search.ts:13) both do.
• Drafts are weak. Only title and description are kept, in sessionStorage.

Reference

Linear new-issue modal (Mobbin):

• breadcrumb "TEAM › New issue"
• large borderless title field, description editor
• a row of property pills (status · priority · assignee · project · labels · …)
• attach button
• "Create more" toggle and a "Create issue" primary button with a ⌘Enter hint
• "Save as draft" and expand-to-full-screen in the header

Do

• Build a modal openable from C, ⌘K → "New issue", the sidebar button, group-header "+" and the board column "+". Prefill status, project, team or assignee from that context.
• Put the title first and autofocus it, then the description (rich editor), then property pills using the same pickers as the detail page.
• Add a "Create more" switch that keeps the modal open and the properties sticky.
• Persist drafts, properties included, to localStorage and show a Drafts entry in the sidebar.
• On success, show a toast "PAR-123 created · View".
• Keep /issues/new as a full-screen fallback for deep links.