Add PF2e spell description popovers in stat blocks

Clicking a spell name in a PF2e creature's stat block now opens a
popover (desktop) or bottom sheet (mobile) showing full spell details:
description, traits, rank, range, target, area, duration, defense,
action cost icons, and heightening rules. All data is sourced from
the embedded Foundry VTT spell items already in the bestiary cache.

- Add SpellReference type replacing bare string spell arrays
- Extract full spell data in pf2e-bestiary-adapter (description,
  traits, traditions, range, target, area, duration, defense,
  action cost, heightening, overlays)
- Strip inline heightening text from descriptions to avoid duplication
- Bold save outcome labels (Critical Success/Failure) in descriptions
- Bump DB_VERSION to 6 for cache invalidation
- Add useSwipeToDismissDown hook for mobile bottom sheet
- Portal popover to document.body to escape transformed ancestors

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/web/src/components/dnd-stat-block.tsx

@@ -134,7 +134,7 @@ export function DndStatBlock({ creature }: Readonly<DndStatBlockProps>) {
 							{sc.atWill && sc.atWill.length > 0 && (
 								<div className="pl-2">
 									<span className="font-semibold">At Will:</span>{" "}
-									{sc.atWill.join(", ")}
+									{sc.atWill.map((s) => s.name).join(", ")}
 								</div>
 							)}
 							{sc.daily?.map((d) => (
@@ -143,7 +143,7 @@ export function DndStatBlock({ creature }: Readonly<DndStatBlockProps>) {
 										{d.uses}/day
 										{d.each ? " each" : ""}:
 									</span>{" "}
-									{d.spells.join(", ")}
+									{d.spells.map((s) => s.name).join(", ")}
 								</div>
 							))}
 							{sc.restLong?.map((d) => (
@@ -155,7 +155,7 @@ export function DndStatBlock({ creature }: Readonly<DndStatBlockProps>) {
 										{d.uses}/long rest
 										{d.each ? " each" : ""}:
 									</span>{" "}
-									{d.spells.join(", ")}
+									{d.spells.map((s) => s.name).join(", ")}
 								</div>
 							))}
 						</div>