tests: consolidate into tests/ dirs, fix import paths

Move all test files out of source dirs into per-workspace tests/:
- shared/tests/   (3 unit test files)
- server/tests/   (1 integration test)
- src/tests/      (8 characterization + scenario tests + testHelpers)

Fix all relative import paths (App, storage, __mocks__, testHelpers).
Fix jest.config testMatch globs in shared/ and server/ (rootDir +
<rootDir>/tests pattern).

Delete scripts/repro-pause-bug.js (debug scratch, superseded by
turn.pause-add.test.js).

Keep scripts/replay-combat.js + scripts/audit-rotation.js as manual
demo/exploratory tools (NOT unit tests, not deterministic).

No logic changes. All green: shared 49 + 1 validated RED, server 23,
FE 62. Scenario test unchanged (240s timeout, pre-existing slow).

src/tests/App.characterization.test.js

@@ -6,7 +6,7 @@
 import React from 'react';
 import { screen, fireEvent, waitFor } from '@testing-library/react';
 import '@testing-library/jest-dom';
-import { getCalls, MOCK_DB } from './__mocks__/firebase/_mock-db';
+import { getCalls, MOCK_DB } from '../__mocks__/firebase/_mock-db';
 import { renderApp, createCampaignViaUI, selectCampaignByName } from './testHelpers';
 
 function findCall(fn, pathSub) {

src/tests/Combat.characterization.test.js

@@ -3,7 +3,7 @@
 import React from 'react';
 import { screen, fireEvent, waitFor } from '@testing-library/react';
 import '@testing-library/jest-dom';
-import { getCalls } from './__mocks__/firebase/_mock-db';
+import { getCalls } from '../__mocks__/firebase/_mock-db';
 import { setupReady, addMonsterViaUI, startCombatViaUI } from './testHelpers';
 
 function findCallsEnc() {

src/tests/Combat.scenario.test.js

@@ -10,12 +10,12 @@
 import React from 'react';
 import { screen, fireEvent, waitFor, within } from '@testing-library/react';
 import '@testing-library/jest-dom';
-import App from './App';
+import App from '../App';
 import {
   renderApp, createCampaignViaUI, selectCampaignByName,
   createEncounterViaUI, selectEncounterByName, addMonsterViaUI, setupReady,
 } from './testHelpers';
-import { getCalls, MOCK_DB } from './__mocks__/firebase/_mock-db';
+import { getCalls, MOCK_DB } from '../__mocks__/firebase/_mock-db';
 
 // ---------- scenario helpers (UI only, same buttons as human) ----------
 

src/tests/DisplayView.characterization.test.js

@@ -6,9 +6,9 @@
 import React from 'react';
 import { render, waitFor } from '@testing-library/react';
 import '@testing-library/jest-dom';
-import App from './App';
-import { MOCK_DB } from './__mocks__/firebase/_mock-db';
-import { getAdapterCalls, resetAdapterCalls } from './storage/firebase';
+import App from '../App';
+import { MOCK_DB } from '../__mocks__/firebase/_mock-db';
+import { getAdapterCalls, resetAdapterCalls } from '../storage/firebase';
 
 // Seed activeDisplay + campaign + encounter so DisplayView has data to subscribe to.
 function seedActiveDisplay() {

src/tests/Encounter.characterization.test.js

@@ -3,7 +3,7 @@
 import React from 'react';
 import { screen, fireEvent, waitFor } from '@testing-library/react';
 import '@testing-library/jest-dom';
-import { getCalls } from './__mocks__/firebase/_mock-db';
+import { getCalls } from '../__mocks__/firebase/_mock-db';
 import { renderApp, createCampaignViaUI, selectCampaignByName, createEncounterViaUI, selectEncounterByName } from './testHelpers';
 
 function findCall(fn, pathSub) {

src/tests/Logs.characterization.test.js

@@ -3,7 +3,7 @@
 import React from 'react';
 import { screen, fireEvent, waitFor } from '@testing-library/react';
 import '@testing-library/jest-dom';
-import { getCalls } from './__mocks__/firebase/_mock-db';
+import { getCalls } from '../__mocks__/firebase/_mock-db';
 import { setupReady, addMonsterViaUI, startCombatViaUI } from './testHelpers';
 
 function findLogCalls() {
@@ -16,7 +16,7 @@ function lastEncCall() {
 
 // Navigate to /logs view. App reads pathname at mount; must re-render with path preset.
 import { render } from '@testing-library/react';
-import App from './App';
+import App from '../App';
 async function goToLogs() {
   // unmount current tree isn't needed; App checks pathname in useEffect.
   // Re-render a fresh App instance in same container.

src/tests/Participant.characterization.test.js

@@ -3,7 +3,7 @@
 import React from 'react';
 import { screen, fireEvent, waitFor, within } from '@testing-library/react';
 import '@testing-library/jest-dom';
-import { getCalls } from './__mocks__/firebase/_mock-db';
+import { getCalls } from '../__mocks__/firebase/_mock-db';
 import { setupReady, addMonsterViaUI, getParticipantForm, startCombatViaUI } from './testHelpers';
 
 function findCallsEnc() {

src/tests/storage.test.js

@@ -2,7 +2,7 @@
 // TDD: contract = spec. Run against memory first. RED until memory.js built.
 'use strict';
 
-const { runStorageContract } = require('./contract');
-const { createMemoryStorage } = require('./memory');
+const { runStorageContract } = require('../storage/contract');
+const { createMemoryStorage } = require('../storage/memory');
 
 runStorageContract('memory', () => createMemoryStorage());

src/tests/testHelpers.js

@@ -1,8 +1,8 @@
 // test helpers: drive App UI to states. Used across characterization suites.
 import React from 'react';
 import { render, screen, fireEvent, waitFor, within } from '@testing-library/react';
-import App from './App';
-import { MOCK_DB } from './__mocks__/firebase/_mock-db';
+import App from '../App';
+import { MOCK_DB } from '../__mocks__/firebase/_mock-db';
 
 // Scoped container: the "Add Participants" section (avoids label clashes with CharacterManager).
 export function getParticipantForm() {
@@ -34,7 +34,7 @@ export async function createCampaignViaUI(name = 'Test Campaign') {
   fireEvent.change(screen.getByLabelText(/Campaign Name/i), { target: { value: name } });
   fireEvent.click(screen.getByRole('button', { name: /^Create$/i }));
   // wait for setDoc recorded
-  const { getCalls } = require('./__mocks__/firebase/_mock-db');
+  const { getCalls } = require('../__mocks__/firebase/_mock-db');
   await waitFor(() => getCalls().find(c => c.fn === 'setDoc' && c.path.includes('/campaigns/')));
   const call = getCalls().find(c => c.fn === 'setDoc' && c.path.includes('/campaigns/'));
   return call.path.split('/').pop(); // campaign id
@@ -53,7 +53,7 @@ export async function createEncounterViaUI(name = 'Test Encounter') {
   await waitFor(() => screen.getByLabelText(/Encounter Name/i));
   fireEvent.change(screen.getByLabelText(/Encounter Name/i), { target: { value: name } });
   fireEvent.click(screen.getByRole('button', { name: /^Create$/i }));
-  const { getCalls } = require('./__mocks__/firebase/_mock-db');
+  const { getCalls } = require('../__mocks__/firebase/_mock-db');
   await waitFor(() => getCalls().find(c => c.fn === 'setDoc' && c.path.includes('/encounters/')));
   const call = getCalls().find(c => c.fn === 'setDoc' && c.path.includes('/encounters/'));
   return call.path.split('/').pop();
@@ -73,7 +73,7 @@ export async function addMonsterViaUI(name = 'Goblin', maxHp = 7, initMod = 2) {
   fireEvent.change(form.getByLabelText(/Init Mod/i), { target: { value: String(initMod) } });
   fireEvent.change(form.getByLabelText(/Max HP/i), { target: { value: String(maxHp) } });
   fireEvent.click(form.getByRole('button', { name: /Add to Encounter/i }));
-  const { getCalls } = require('./__mocks__/firebase/_mock-db');
+  const { getCalls } = require('../__mocks__/firebase/_mock-db');
   await waitFor(() => {
     const calls = getCalls().filter(c => c.fn === 'updateDoc' && c.path.includes('/encounters/'));
     const last = calls[calls.length - 1];
@@ -93,7 +93,7 @@ export async function setupReady(campName = 'Camp', encName = 'Enc') {
 // Start combat. Assumes encounter selected with active participants.
 export async function startCombatViaUI() {
   fireEvent.click(screen.getByRole('button', { name: /Start Combat/i }));
-  const { getCalls } = require('./__mocks__/firebase/_mock-db');
+  const { getCalls } = require('../__mocks__/firebase/_mock-db');
   await waitFor(() => {
     const calls = getCalls().filter(c => c.fn === 'updateDoc' && c.path.includes('/encounters/'));
     const last = calls[calls.length - 1];