deploy a 1:1-mounted local stack by file so its compose path is preserved

tests/rewrite-compose-volume-paths.test.ts

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+import { describe, test, expect, afterEach } from 'bun:test';
+import { rewriteComposeVolumePaths, __setCachedMountsForTest } from '../src/lib/server/host-path';
+
+afterEach(() => __setCachedMountsForTest(null));
+
+const compose = (bind: string) => `services:\n  app:\n    image: x\n    volumes:\n      - ${bind}\n`;
+
+describe('rewriteComposeVolumePaths', () => {
+	test('1:1 mount (host path == container path) leaves the relative bind untouched (#1514)', () => {
+		// TerraMaster/1:1 case: the compose dir is mounted at the identical path, so
+		// translating ./data_db to the same absolute path is pointless and would force
+		// a stdin deploy that loses com.docker.compose.project.config_files.
+		__setCachedMountsForTest([
+			{ source: '/Volume1/Development/Docker', destination: '/Volume1/Development/Docker' }
+		]);
+		const r = rewriteComposeVolumePaths(compose('./data_db:/var/lib/postgresql/data'), '/Volume1/Development/Docker/authentik');
+		expect(r.modified).toBe(false);
+		expect(r.content).toContain('- ./data_db:/var/lib/postgresql/data');
+		expect(r.changes.length).toBe(0);
+	});
+
+	test('non-1:1 mount (container path differs from host) still translates (no regression)', () => {
+		// The Dockhand-in-Docker case: /app/data mounted from /docker/data on the host.
+		__setCachedMountsForTest([{ source: '/docker/data', destination: '/app/data' }]);
+		const r = rewriteComposeVolumePaths(compose('./sub:/x'), '/app/data/stacks/myapp');
+		expect(r.modified).toBe(true);
+		expect(r.content).toContain('- /docker/data/stacks/myapp/sub:/x');
+	});
+
+	test('untranslatable relative bind (no matching mount) is left unchanged', () => {
+		__setCachedMountsForTest([{ source: '/docker/data', destination: '/app/data' }]);
+		const r = rewriteComposeVolumePaths(compose('./x:/y'), '/somewhere/else');
+		expect(r.modified).toBe(false);
+		expect(r.content).toContain('- ./x:/y');
+	});
+
+	test('no mounts known: nothing is translated', () => {
+		__setCachedMountsForTest([]);
+		const r = rewriteComposeVolumePaths(compose('./x:/y'), '/app/data/s');
+		expect(r.modified).toBe(false);
+	});
+
+	test('named volumes and absolute binds are never touched', () => {
+		__setCachedMountsForTest([{ source: '/docker/data', destination: '/app/data' }]);
+		const named = 'services:\n  app:\n    volumes:\n      - dbdata:/var/lib\n      - /abs/host:/x\n';
+		const r = rewriteComposeVolumePaths(named, '/app/data/s');
+		expect(r.modified).toBe(false);
+		expect(r.content).toBe(named);
+	});
+});