feat(release): make the signing-free install work with nothing but Windows

The manual install path still needed 7-Zip, which the target machine does not
have, so "installable without a certificate" was not yet true.

The channel now also publishes the app as byte-split zip parts, and the install
script joins them and extracts with the built-in Windows Expand-Archive after
verifying every part and the joined archive. Version 1.3.1 republishes the
channel from a single build, because a version's artifacts can only match one
build and published volumes are never overwritten.

scripts/ci/build-portable.mjs

@@ -11,6 +11,9 @@
 //   apps/desktop/release/<version>/portable.json     (볼륨 인덱스: 이름/크기/sha256)
 //   bucket/d3ro-voice.json                           (Scoop 매니페스트, 커밋 대상)
 //
+// zip 분할 부품(수동 설치용)도 함께 만든다 — Windows 내장 Expand-Archive로 해제할 수 있어
+// 사용자에게 7-Zip 설치를 요구하지 않는다. 7z 볼륨은 Scoop 전용으로 더 작다(162MiB vs 243MiB).
+//
 // 사용:
 //   npm run build --workspace=@d3ro/desktop
 //   node scripts/ci/build-portable.mjs            # 7z 분할 볼륨
@@ -18,7 +21,15 @@
 
 import { spawnSync } from 'node:child_process'
 import { createHash } from 'node:crypto'
-import { existsSync, readFileSync, readdirSync, rmSync, statSync, writeFileSync } from 'node:fs'
+import {
+  existsSync,
+  readFileSync,
+  readdirSync,
+  renameSync,
+  rmSync,
+  statSync,
+  writeFileSync,
+} from 'node:fs'
 import { createRequire } from 'node:module'
 import { dirname, join } from 'node:path'
 import { fileURLToPath } from 'node:url'
@@ -34,9 +45,12 @@ const FEED = 'https://git.chanpaca.net/api/packages/yunchan/generic/d3ro-voice'
 const PORTABLE_VERSION_PATH = `${FEED}/portable-${version}`
 const PORTABLE_LATEST_PATH = `${FEED}/portable-latest`
 const ARCHIVE_BASE = `D3RO-Voice-${version}-x64-portable`
-/** Cloudflare 본문 한도(100MiB)보다 여유를 둔 볼륨 크기 */
+/** Cloudflare 본문 한도(100MiB)보다 여유를 둔 7z 볼륨 크기 (Scoop 경로) */
 const VOLUME_SIZE = '95m'
 const MAX_VOLUME_BYTES = 95 * 1024 * 1024
+/** 수동 설치 스크립트용 zip 분할 부품 크기 */
+const ZIP_PART_SIZE = '90m'
+const MAX_ZIP_PART_BYTES = 95 * 1024 * 1024
 
 const wantZip = process.argv.includes('--zip')
 const releaseDir = join(desktopDir, 'release', version)
@@ -225,6 +239,73 @@ writeFileSync(
   'utf8',
 )
 
+// ── 수동 설치용 zip 분할 부품 ─────────────────────────────
+const zipTarget = join(releaseDir, `${ARCHIVE_BASE}.zip`)
+console.log(`[portable] 수동 설치용 zip 생성 (분할 ${ZIP_PART_SIZE})`)
+const zipBuild = spawnSync(
+  'npx',
+  [
+    'electron-builder',
+    '--win',
+    'zip',
+    '--x64',
+    '--config',
+    'electron-builder.yml',
+    '--publish',
+    'never',
+    '-c.win.forceCodeSigning=false',
+    '-c.npmRebuild=false',
+  ],
+  { cwd: desktopDir, stdio: 'inherit', shell: process.platform === 'win32' },
+)
+if (zipBuild.status !== 0) {
+  console.error(`[portable] zip 빌드 실패 (exit ${zipBuild.status ?? 'null'})`)
+  process.exit(zipBuild.status ?? 1)
+}
+
+const producedZip = readdirSync(releaseDir).find((name) =>
+  name.endsWith('.zip') && name.includes(version) && !name.includes('.part'),
+)
+if (!producedZip) {
+  console.error('[portable] zip 산출물을 찾을 수 없습니다.')
+  process.exit(1)
+}
+if (join(releaseDir, producedZip) !== zipTarget) {
+  renameSync(join(releaseDir, producedZip), zipTarget)
+}
+
+// zip을 90MiB 단위로 바이트 분할한다 (사용자가 이어 붙여 Expand-Archive로 해제)
+const zipBytes = readFileSync(zipTarget)
+const partSize = 90 * 1024 * 1024
+const zipParts = []
+for (let offset = 0, index = 1; offset < zipBytes.length; offset += partSize, index += 1) {
+  const slice = zipBytes.subarray(offset, Math.min(offset + partSize, zipBytes.length))
+  const name = `${ARCHIVE_BASE}.zip.${String(index).padStart(3, '0')}`
+  if (slice.length > MAX_ZIP_PART_BYTES) {
+    console.error(`[portable] zip 부품이 너무 큽니다: ${name}`)
+    process.exit(1)
+  }
+  writeFileSync(join(releaseDir, name), slice)
+  zipParts.push({
+    name,
+    size: slice.length,
+    sha256: createHash('sha256').update(slice).digest('hex'),
+    url: `${PORTABLE_VERSION_PATH}/${name}`,
+  })
+}
+const zipSha256 = createHash('sha256').update(zipBytes).digest('hex')
+
+// 인덱스에 zip 부품 정보를 추가한다 (설치 스크립트가 사용)
+const indexJson = JSON.parse(readFileSync(join(releaseDir, 'portable.json'), 'utf8'))
+indexJson.zipArchive = `${ARCHIVE_BASE}.zip`
+indexJson.zipSize = zipBytes.length
+indexJson.zipSha256 = zipSha256
+indexJson.zipParts = zipParts
+writeFileSync(
+  join(releaseDir, 'portable.json'),
+  `${JSON.stringify(indexJson, null, 2)}\n`,
+  'utf8',
+)
 console.log(
   [
     '[portable] 완료',
@@ -232,6 +313,7 @@ console.log(
     ...volumeEntries.map(
       (entry) => `    ${entry.name} (${(entry.size / 1048576).toFixed(1)}MiB)`,
     ),
+    `  zip    : ${zipParts.length}개 부품 / 합계 ${(zipBytes.length / 1048576).toFixed(1)}MiB`,
     `  인덱스 : ${join(releaseDir, 'portable.json')}`,
     `  scoop  : ${join(root, 'bucket', 'd3ro-voice.json')}`,
     `  게시   : node scripts/ci/publish-portable-release.mjs`,