chore: remove all source code comments and internal artifacts

Strip every comment from the source (parsed with the TypeScript compiler so
strings, template literals, regex literals and JSX are never touched), and drop
internal/working artifacts that do not belong in the public repository
(design mockups, internal analysis docs, a stray backup file and an old log).
No functional change: build is green, the full test suite passes.

tests/extractor.test.ts

@@ -865,7 +865,6 @@ describe("extractor", () => {
       const root = fs.mkdtempSync(path.join(os.tmpdir(), "rd-sig-"));
       tempDirs.push(root);
       const filePath = path.join(root, "test.rar");
-      // RAR5 signature: 52 61 72 21 1A 07
       fs.writeFileSync(filePath, Buffer.from("526172211a0700", "hex"));
       const sig = await detectArchiveSignature(filePath);
       expect(sig).toBe("rar");
@@ -942,7 +941,6 @@ describe("extractor", () => {
       const candidates = await findArchiveCandidates(packageDir);
       const names = candidates.map((c) => path.basename(c));
       expect(names).toContain("movie.001");
-      // .002 should NOT be in candidates (only .001 is the entry point)
       expect(names).not.toContain("movie.002");
     });
 
@@ -957,7 +955,6 @@ describe("extractor", () => {
 
       const candidates = await findArchiveCandidates(packageDir);
       const names = candidates.map((c) => path.basename(c));
-      // .zip.001 should appear once from zipSplit detection, not duplicated by genericSplit
       expect(names.filter((n) => n === "movie.zip.001")).toHaveLength(1);
     });
 
@@ -1100,7 +1097,6 @@ describe("extractor", () => {
       const targetDir = path.join(root, "out");
       fs.mkdirSync(packageDir, { recursive: true });
 
-      // Create 3 zip archives
       for (const name of ["ep01.zip", "ep02.zip", "ep03.zip"]) {
         const zip = new AdmZip();
         zip.addFile(`${name}.txt`, Buffer.from(name));
@@ -1127,7 +1123,6 @@ describe("extractor", () => {
 
       expect(result.extracted).toBe(3);
       expect(result.failed).toBe(0);
-      // First archive should be ep01 (natural order, extracted serially for discovery)
       expect(seenOrder[0]).toBe("ep01.zip");
     });
 
@@ -1144,7 +1139,6 @@ describe("extractor", () => {
         zip.writeZip(path.join(packageDir, name));
       }
 
-      // No passwordList → only empty string → length=1 → no discovery phase
       const result = await extractPackageArchives({
         packageDir,
         targetDir,