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/__tests__/stat-block.test.tsx

@@ -111,9 +111,15 @@ const DRAGON: Creature = {
 		{
 			name: "Innate Spellcasting",
 			headerText: "The dragon's spellcasting ability is Charisma.",
-			atWill: ["detect magic", "suggestion"],
-			daily: [{ uses: 3, each: true, spells: ["fireball", "wall of fire"] }],
-			restLong: [{ uses: 1, each: false, spells: ["wish"] }],
+			atWill: [{ name: "detect magic" }, { name: "suggestion" }],
+			daily: [
+				{
+					uses: 3,
+					each: true,
+					spells: [{ name: "fireball" }, { name: "wall of fire" }],
+				},
+			],
+			restLong: [{ uses: 1, each: false, spells: [{ name: "wish" }] }],
 		},
 	],
 };