Perfection pass: complete level-up/build flows + dying polish

Second adversarial audit of the freshly-shipped code; fixed bugs + completeness gaps.

- abilityBuild stays in sync with totals on level-up (appendLevelIncreases)
- 5e feat picker in level-up; PF2e feat-name autocomplete; expertise sets ranks
- Higher-level creation collects PF2e skill increases + 5e expertise
- PF2e heritage: schema field, wizard picker, sheet, Pathbuilder import
- 5e Hit Dice as a tracked resource (half-level long-rest recovery via recoverStep)
- Dying flow: knockout sets HP 0, stays unconscious at 0 HP, healing wakes +Wounded,
  Heroic Recovery (spend hero points); damage-while-dying + recovery reminders (pf2e)
- Healing caps at effective max (drained/exhaustion-4) on sheet, tracker, and rest;
  massive-damage death uses effective max; persistent-damage badge
- UX: in-place valued-condition steppers, point-buy budget caps, prepared-vs-known
  spell guidance, granted skills in review, system-gated score generator

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/lib/rules/depth.test.ts

@@ -106,4 +106,20 @@ describe('applyRest', () => {
     // no concentration → no concentration key in the patch
     expect('concentration' in applyRest(makeCharacter(), short)).toBe(false);
   });
+
+  it('long rest caps restored HP at the effective max while exhaustion stays 4+', () => {
+    const c = { ...makeCharacter(), defenses: { ...makeCharacter().defenses, exhaustion: 5 } };
+    const long = dnd5e.restOptions.find((o) => o.id === 'long')!;
+    const patch = applyRest(c, long);
+    // exhaustion 5 → 4 after the rest; max HP still halved (30 → 15)
+    expect(patch.defenses!.exhaustion).toBe(4);
+    expect(patch.hp!.current).toBe(15);
+  });
+
+  it('a per-resource recoverStep restores by that amount, not to max (Hit Dice)', () => {
+    const base = makeCharacter();
+    const c = { ...base, resources: [{ id: 'hd', name: 'Hit Dice', current: 0, max: 5, recovery: 'long' as const, recoverStep: 3 }] };
+    const long = dnd5e.restOptions.find((o) => o.id === 'long')!;
+    expect(applyRest(c, long).resources![0]!.current).toBe(3); // 0 + ceil(5/2)=3, not 5
+  });
 });