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/adapters/__tests__/bestiary-adapter.test.ts

@@ -181,17 +181,20 @@ describe("normalizeBestiary", () => {
 		expect(sc?.name).toBe("Spellcasting");
 		expect(sc?.headerText).toContain("DC 15");
 		expect(sc?.headerText).not.toContain("{@");
-		expect(sc?.atWill).toEqual(["Detect Magic", "Mage Hand"]);
+		expect(sc?.atWill).toEqual([
+			{ name: "Detect Magic" },
+			{ name: "Mage Hand" },
+		]);
 		expect(sc?.daily).toHaveLength(2);
 		expect(sc?.daily).toContainEqual({
 			uses: 2,
 			each: true,
-			spells: ["Fireball"],
+			spells: [{ name: "Fireball" }],
 		});
 		expect(sc?.daily).toContainEqual({
 			uses: 1,
 			each: false,
-			spells: ["Dimension Door"],
+			spells: [{ name: "Dimension Door" }],
 		});
 	});