Build MVP: campaigns, characters, combat, dice, compendium

- Rules abstraction (5e + pf2e) behind one interface, fully tested
- Pure combat engine: turn-order safe across add/remove/reorder/init-change
- Dexie storage with real cascade deletes + Zod validation on write
- Seedable dice engine with notation parser
- Lazy SRD compendium (code-split), bestiary -> combat
- Strict TS, 54 unit tests, Playwright e2e smoke (all green)

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

src/lib/schemas/encounter.ts

@@ -0,0 +1,39 @@
+import { z } from 'zod';
+import { conditionSchema, hpSchema, int } from './common';
+
+export const combatantKindSchema = z.enum(['pc', 'npc', 'monster']);
+
+export const combatantSchema = z.object({
+  id: z.string(),
+  name: z.string().min(1).max(120),
+  kind: combatantKindSchema,
+  /** link to a Character, if this combatant is a tracked PC/NPC */
+  characterId: z.string().optional(),
+  /** ref into the bestiary, if spawned from a monster */
+  monsterRef: z.string().optional(),
+
+  initiative: int,
+  ac: int,
+  hp: hpSchema,
+  conditions: z.array(conditionSchema).default([]),
+  notes: z.string().max(2000).default(''),
+});
+
+export type Combatant = z.infer<typeof combatantSchema>;
+
+export const encounterStatusSchema = z.enum(['planning', 'active', 'ended']);
+
+export const encounterSchema = z.object({
+  id: z.string(),
+  campaignId: z.string(),
+  name: z.string().min(1).max(120),
+  status: encounterStatusSchema.default('planning'),
+  round: int.nonnegative().default(0),
+  /** index into combatants of whose turn it is */
+  turnIndex: int.nonnegative().default(0),
+  combatants: z.array(combatantSchema).default([]),
+  createdAt: z.string(),
+  updatedAt: z.string(),
+});
+
+export type Encounter = z.infer<typeof encounterSchema>;