installer-rp: delete partial artifacts on failure; bump to 0.3.6

Resume previously skipped any track/cover whose file merely existed, so a
partially written NN.ogg or cover_NN.png from a failed download/convert
could be mistaken for a finished file on the next attempt. Now the
failure path removes the expected output before bailing, so only fully
completed artifacts are skipped on resume.

Co-Authored-By: Claude Opus 4 <noreply@anthropic.com>

src/installer-rp/main.ts

@@ -365,6 +365,9 @@ ipcMain.handle('rp:install:start', async (): Promise<{ resourcepackPath: string
     async function tryDownloadTrack(i: number, emitErrorProgress: boolean): Promise<boolean> {
       const entry = musicList[i]
       const idx = i + 1
+      // 최종 산출물 경로. 실패 시 부분 생성된 파일을 지워, 다음 재시도(이어받기)에서
+      // 완성본으로 오인해 건너뛰는 일을 막는다.
+      const expectedOut = path.join(musicDir, String(idx).padStart(2, '0') + '.ogg')
       sendLog(t('log.musicTrackStart', { idx }))
       sendProgress({ phase: 'item', kind: 'music', index: idx, total: musicTotal, percent: 0, status: 'running' })
       let child: ChildProcess | null = null
@@ -394,6 +397,8 @@ ipcMain.handle('rp:install:start', async (): Promise<{ resourcepackPath: string
         return true
       } catch (err) {
         if (child) state.activeChildren.delete(child)
+        // 부분 생성된 .ogg 를 제거(이어받기 시 완성본 오인 방지).
+        await fsp.rm(expectedOut, { force: true }).catch(() => {})
         if (state.cancelRequested) {
           sendProgress({ phase: 'item', kind: 'music', index: idx, total: musicTotal, percent: 0, status: 'error', message: t('progress.cancelled') })
           return false
@@ -483,15 +488,19 @@ ipcMain.handle('rp:install:start', async (): Promise<{ resourcepackPath: string
       try {
         buf = await downloadImage(entry.url)
       } catch (err) {
+        // 부분 생성됐을 수 있는 커버 파일 제거(이어받기 시 완성본 오인 방지).
+        await fsp.rm(coverPath, { force: true }).catch(() => {})
         sendProgress({ phase: 'item', kind: 'image', index: idx, total: imageTotal, percent: 0, status: 'error', message: (err as Error).message })
         throw new Error(t('errors.imageDownloadFailed', { idx, message: (err as Error).message }))
       }
       throwIfCancelled()
       sendProgress({ phase: 'item', kind: 'image', index: idx, total: imageTotal, percent: 60, status: 'running' })
-      const outPath = path.join(paintingDir, coverFileName(idx))
+      const outPath = coverPath
       try {
         await normalizeToCover(buf, outPath)
       } catch (err) {
+        // 변환 중 부분 생성된 PNG 제거(이어받기 시 완성본 오인 방지).
+        await fsp.rm(coverPath, { force: true }).catch(() => {})
         sendProgress({ phase: 'item', kind: 'image', index: idx, total: imageTotal, percent: 0, status: 'error', message: (err as Error).message })
         throw new Error(t('errors.imageNormalizeFailed', { idx, message: (err as Error).message }))
       }