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/log-timestamp.test.ts

@@ -6,23 +6,18 @@ describe("logTimestamp", () => {
     const instant = new Date("2026-05-31T17:29:43.605Z");
     const formatted = logTimestamp(instant);
 
-    // Shape: YYYY-MM-DDTHH:MM:SS.mmm±HH:MM
     expect(formatted).toMatch(/^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d{3}[+-]\d{2}:\d{2}$/);
-    // The whole point: NOT the old UTC "...Z" format that showed 17:29 instead of 19:29.
     expect(formatted.endsWith("Z")).toBe(false);
   });
 
   it("is parseable back to the exact same instant (offset keeps it unambiguous)", () => {
     const instant = new Date("2026-05-31T17:29:43.605Z");
-    // Date.parse must still recover the identical instant (trace-log autoDisableAt etc.).
     expect(new Date(logTimestamp(instant)).getTime()).toBe(instant.getTime());
   });
 
   it("shows the LOCAL wall-clock hour (machine-timezone-independent assertion)", () => {
     const instant = new Date("2026-05-31T17:29:43.605Z");
     const formatted = logTimestamp(instant);
-    // Hour segment must equal the local getHours() of the same instant — i.e. the
-    // user's wall clock, whatever the server timezone is.
     expect(formatted.slice(11, 13)).toBe(String(instant.getHours()).padStart(2, "0"));
   });
 });