Phase 3: combat depth

- Condition durations + auto-expiry: timed conditions tick down on the affected
  combatant's turn and drop at 0 (engine tickConditions; UI rounds field + (Nr) chip)
- Initiative: Roll-all (d20 + per-combatant bonus, re-sort anchored) + group/quantity add
- Combat log: per-round event feed (turns, round changes, damage/heal, expiries,
  removals) + in-memory Undo of the last change
- Encounter difficulty budget: 5e XP thresholds + PF2e level budget (pure lib +
  tests); live difficulty/XP-award readout from monster combatants vs the party
- Combatants carry initBonus + cr/level; compendium add-to-combat passes them

18 new unit tests (durations, applyInitiatives, budget), new combat-depth e2e.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

e2e/combat-depth.spec.ts

@@ -0,0 +1,44 @@
+import { test, expect } from '@playwright/test';
+
+test.beforeEach(async ({ page }) => {
+  await page.goto('/');
+  await page.evaluate(async () => {
+    indexedDB.deleteDatabase('ttrpg-manager');
+    localStorage.clear();
+  });
+  await page.reload();
+});
+
+test('combat depth: timed condition auto-expires, log records events, roll-all works', async ({ page }) => {
+  await page.getByRole('button', { name: '+ New campaign' }).first().click();
+  await page.locator('input[data-autofocus]').fill('Depth');
+  await page.getByRole('button', { name: 'Create' }).click();
+
+  await page.getByRole('link', { name: 'Combat' }).click();
+  await page.getByRole('button', { name: '+ New encounter' }).first().click();
+  await page.locator('input[data-autofocus]').fill('Brawl');
+  await page.getByRole('button', { name: 'Create' }).click();
+
+  await page.getByLabel('Name').fill('Goblin');
+  await page.getByRole('button', { name: 'Add', exact: true }).click();
+
+  const row = page.locator('li', { hasText: 'Goblin' });
+
+  // Add Prone with a 1-round duration
+  await row.getByLabel('Condition duration in rounds').fill('1');
+  await row.getByLabel('Add condition').selectOption('Prone');
+  await expect(row.getByRole('button', { name: /Prone \(1r\)/ })).toBeVisible();
+
+  // Roll-all initiative
+  await page.getByRole('button', { name: /Roll all/ }).click();
+
+  // Start combat, then advance a turn — Prone should expire on Goblin's next turn
+  await page.getByRole('button', { name: 'Start combat' }).click();
+  await expect(page.getByRole('button', { name: 'End' })).toBeVisible(); // combat is active
+  await page.getByRole('button', { name: /Next turn/ }).click();
+  await expect(row.getByRole('button', { name: /Prone/ })).toHaveCount(0);
+
+  // Combat log captured the events
+  await expect(page.getByText('Combat Log')).toBeVisible();
+  await expect(page.getByText(/Prone wore off/)).toBeVisible();
+});

e2e/smoke.spec.ts

@@ -48,7 +48,7 @@ test('full core flow: campaign → character → dice → combat → compendium'
   await page.getByRole('button', { name: 'Add', exact: true }).click();
   await expect(page.getByText('Goblin')).toBeVisible();
   await page.getByRole('button', { name: 'Start combat' }).click();
-  await expect(page.getByText(/Round 1/)).toBeVisible();
+  await expect(page.getByRole('button', { name: 'End' })).toBeVisible(); // combat active
 
   // --- Compendium ---
   await page.getByRole('link', { name: 'Compendium' }).click();