feat: flat spell frontmatter, full source-book titles, drop circle

Parser reads human-friendly flat keys (range, targets, castingTime, overcast
list, threshold/successes, ...) and expands them to SpellData; fixes
[object Object] range, empty targets/casting time and blank overcast rows.
SOURCE_BOOKS ids now match vault slugs and show full book titles.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

tests/parsers/spell-parser.test.ts

@@ -0,0 +1,48 @@
+import { describe, it, expect } from 'vitest';
+import { resolve } from 'node:path';
+import { parseSpells, deriveAreaOfEffect, deriveCastingTime } from '../../scripts/parsers/spell-parser';
+import { SOURCE_BOOKS } from '../../src/constants';
+
+describe('spell-parser', () => {
+  it('expands the flat vault frontmatter into a Foundry-loadable system payload', async () => {
+    const ctx = { repoRoot: resolve(__dirname, '../../../..'), idOverrides: {}, strict: true } as any;
+    const docs = await parseSpells(ctx);
+    expect(docs.length).toBeGreaterThan(100);
+
+    const mm = docs.find((d) => d.id === 'magic-missile')!;
+    const s = mm.system as any;
+    expect(mm.name).toBe('Magiczny Pocisk');
+    expect(s.sourceBook).toBe('ksiega-magii');
+    expect(s.castingTime).toBe('Instant');
+    expect(s.range).toBe('15 m');
+    expect(s.targets).toBe('1');
+    expect(s.damageBase).toBe('magicalAbilities/2');
+    expect(s.damageType).toBe('magical');
+    expect(s.difficulty).toEqual({ threshold: 4, successes: 1 });
+    expect(s.overcastOptions).toEqual([{ description: '+1 punkt Obrażeń', manaPerStep: 1 }]);
+    expect(s).not.toHaveProperty('circle');
+
+    for (const d of docs) {
+      const sys = d.system as any;
+      // No object leaks into string fields (the "[object Object]" bug).
+      for (const k of ['range', 'targets', 'duration', 'castingTime', 'damageBase']) {
+        expect(typeof sys[k], `${d.id}.${k}`).toBe('string');
+      }
+      for (const o of sys.overcastOptions) expect(o.description, d.id).toBeTruthy();
+      expect(SOURCE_BOOKS as readonly string[], d.id).toContain(sys.sourceBook);
+    }
+  });
+
+  it('derives area of effect from the targets line', () => {
+    expect(deriveAreaOfEffect('Kwadrat o boku 5 m')).toMatchObject({ shape: 'square', x: 5, y: 5 });
+    expect(deriveAreaOfEffect('Prostokąt 3 m x 8 m. Dłuższy bok')).toMatchObject({ shape: 'rectangle', x: 3, y: 8 });
+    expect(deriveAreaOfEffect('Sfera o średnicy 100 m')).toMatchObject({ shape: 'sphere', x: 50 });
+    expect(deriveAreaOfEffect('1')).toMatchObject({ shape: 'point', x: 0 });
+  });
+
+  it('derives casting time numbers', () => {
+    expect(deriveCastingTime('Instant')).toEqual({ rounds: 0, minutes: 0 });
+    expect(deriveCastingTime('2 godziny')).toEqual({ rounds: 0, minutes: 120 });
+    expect(deriveCastingTime('10 minut')).toEqual({ rounds: 0, minutes: 10 });
+  });
+});