Update project documentation and code comments to remove platform-specific references

Refactor documentation files and code comments to remove references to Replit, specific task numbers, and other platform-specific identifiers.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 77cfe984-2c65-4152-bb7a-0df28274fe66
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Event-Id: fa18e5d4-a810-4bd5-8cde-2a60d64d9e3f
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/c3c252e4-c83d-40ca-9fff-99a3ea60701e/77cfe984-2c65-4152-bb7a-0df28274fe66/kI0sxlu
Replit-Helium-Checkpoint-Created: true

artifacts/tx-os/src/__tests__/incoming-note-popup-queue.test.mjs

@@ -1,4 +1,4 @@
-// Unit tests for the incoming-note popup queue (Task #406).
+// Unit tests for the incoming-note popup queue.
 //
 // The queue is the data structure behind the centered modal that
 // appears on the recipient's screen the moment a `note_received` socket

artifacts/tx-os/src/__tests__/parse-time.test.mjs

@@ -1,6 +1,6 @@
 // Unit tests for parseTypedTime — the human-input time parser used by
 // the executive-meetings inline time editor. Covers every shape listed
-// in task #308's "Done looks like" plus the obvious invalid edges.
+// in's "Done looks like" plus the obvious invalid edges.
 //
 // Runs with Node 24's built-in test runner + native TypeScript support.
 import { test } from "node:test";

artifacts/tx-os/src/__tests__/time-12h.test.mjs

@@ -1,4 +1,4 @@
-// Unit tests for the 12-hour-picker helpers (task #315). Covers the
+// Unit tests for the 12-hour-picker helpers. Covers the
 // AM/PM disambiguation rules that fix the "1:15 silently saved as AM"
 // bug — the picker MUST require an explicit toggle for any 1–12 hour
 // without a typed AM/PM marker, and MUST accept any 13–23 hour or