docs: update AI usage transcripts

docs/AI_USAGE.md

@@ -5,7 +5,6 @@ AI tools were used during the development of Planner Danner to assist with plann
 The AI tools used were:
 
 - ChatGPT
-- Copilot
 - OpenAI Codex
 
 AI assistance was used throughout the development process, but outputs were reviewed and adjusted where they did not match the project requirements, existing design, or expected behaviour.
@@ -15,7 +14,6 @@ AI assistance was used throughout the development process, but outputs were revi
 The full AI development transcripts are included in this repository. Original shared conversation links are also provided where available.
 
 - [ChatGPT Transcript](ai-transcripts/chatgpt-transcript.md) — [Original ChatGPT conversation](https://chatgpt.com/share/6a7b901e-4288-83ea-9325-6fb1a223e0ba)
-- [Copilot Transcript](ai-transcripts/copilot-transcript.md) — [Original Copilot conversation](https://copilot.microsoft.com/shares/SCgdKtWrWaVa2uJYi5NC1)
 - [OpenAI Codex Transcript](ai-transcripts/codex-transcript.md)
 
 The sections below summarise the main constraints, corrections, debugging decisions, and implementation choices shown in those transcripts.
@@ -49,7 +47,7 @@ For the automated testing stage, Codex was specifically instructed to test real
 
 ## Planning and Early Development
 
-ChatGPT and Copilot were used during the earlier stages of the project while I was learning how to structure the application using Next.js.
+ChatGPT was used during the earlier stages of the project while I was learning how to structure the application using Next.js.
 
 I began with a working Next.js project containing a welcome page and an early three-column task dashboard. The early version stored tasks only in React state and did not yet have SQLite persistence.
 
@@ -79,7 +77,7 @@ Some early suggestions were not kept in the final implementation. For example, `
 
 AI was used to assist with implementation at several stages.
 
-During the frontend stage, ChatGPT and Copilot assisted with:
+During the frontend stage, ChatGPT assisted with:
 
 - restructuring the dashboard into reusable components;
 - creating the Add Task modal;

docs/ai-transcripts/copilot-transcript.md

@@ -1,11 +0,0 @@
-# Copilot Transcript
-
-Project: COMS3011A Lab 1 — Planner Danner  
-Tool: Copilot
-
-Original shared conversation:  
-https://copilot.microsoft.com/shares/SCgdKtWrWaVa2uJYi5NC1
-
-## Transcript
-
-[\[Actual Copilot transcript below\]](https://copilot.microsoft.com/shares/SCgdKtWrWaVa2uJYi5NC1)