Replace legacy ecosystem tests with focused composition tests

Removes the two large legacy integration suites:
  - ecosystem.integration.test.ts (9 monolithic tests, ~1900 lines,
    14 occurrences of autoInvalidateOn, exercising the
    APP_ORCHESTRATION_STANDARD path that is being removed).
  - session-translator.test.ts (validates wireSessionTranslator,
    which is also being removed).

Replaces active-app.test.ts (1072 lines, 26 tests with heavy
dependence on App.createActiveX() and publishApp* publishers) with
~200 lines of focused composition tests:
  - core surface (Logger, Lang, Format, Frontend, Dom, Storage,
    Http, Timers, Bus, Orca, Cache, dispose).
  - locale flow (setLocale, onLocaleChange).
  - mono-lang behavior (path passthrough, warn-once, |fallback).
  - dispose idempotency and Orca teardown.

The new model's coverage already lives in:
  - schema-declarative.test.ts — declarative App.cache / App.session
    end-to-end.
  - service-builder.test.ts — topology, lazy proxies, dispose.
  - service-factories.test.ts — each defineActiveX wired against a
    real core.
  - presets.test.ts — orca actions registered via applyStandardOrca
    react to SESSION_EVENT_*.

Total suite: 1383 pass (down from 1408 — the deleted legacy tests
were exercising paths that disappear entirely in the big-bang).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/arts/active-app/test/session-translator.test.ts

@@ -1,43 +0,0 @@
-import { describe, expect, it } from 'vitest';
-import { createEngineBus } from '$bus';
-import {
-	APP_EVENT_USER_IDENTITY_CHANGED,
-	APP_USER_IDENTITY_CAUSE_SESSION_ADOPTED,
-	type AppEventMap
-} from '$libs/active-app/events';
-import { SESSION_EVENT_LIFECYCLE_ADOPTED } from '$session/consts';
-import type { SessEventMap, SessLifecyclePayload } from '$session/types';
-import { publishAppIdentityFromSessionLifecycleEvent } from '../integrations/session-translator.ts';
-
-describe('app session translator', () => {
-	it('maps session lifecycle payloads explicitly without leaking extra sensitive fields', () => {
-		const Bus = createEngineBus<AppEventMap & SessEventMap>();
-		const appPayloads: unknown[] = [];
-		const off = Bus.on(APP_EVENT_USER_IDENTITY_CHANGED, (event) => {
-			appPayloads.push(event.payload);
-		});
-
-		publishAppIdentityFromSessionLifecycleEvent(
-			Bus,
-			{
-				event: SESSION_EVENT_LIFECYCLE_ADOPTED,
-				generation: 1,
-				identity: { from: 'none', to: 'identified' },
-				credential: { token: 'secret-token' },
-				headers: { authorization: 'Bearer secret-token' }
-			} as unknown as SessLifecyclePayload
-		);
-
-		expect(appPayloads).toHaveLength(1);
-		expect(JSON.stringify(appPayloads[0])).not.toContain('secret-token');
-		expect(appPayloads[0]).toEqual({
-			event: SESSION_EVENT_LIFECYCLE_ADOPTED,
-			generation: 1,
-			identity: { from: 'none', to: 'identified' },
-			cause: APP_USER_IDENTITY_CAUSE_SESSION_ADOPTED
-		});
-
-		off.unsubscribe();
-		Bus.dispose();
-	});
-});