Add dedicated Create New Diagram page

[Copilot]

No page existed for creating new diagrams from scratch — users could only view pre-built examples.

Changes

• ExcalidrawViewer.tsx — Added defaultEditMode?: boolean prop so consumers can start the canvas in edit mode (defaults to false, no breaking change)
• src/pages/create.astro — New /create route: empty Excalidraw canvas with defaultEditMode={true}, Export JSON, theme toggle, and back navigation
• src/pages/index.astro — Added "Create New Diagram" feature card linking to /Tooda/create
• tests/create.spec.ts — Playwright tests: page metadata, canvas render, default edit mode, export download, mode toggle, home card link, mobile tap

// ExcalidrawViewer now accepts an optional prop:
<ExcalidrawViewer elements={[]} defaultEditMode={true} />

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• scarf.sh
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node node ./report.js (dns block)
• telemetry.astro.build
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node node /home/REDACTED/work/Tooda/Tooda/node_modules/.bin/astro build git conf�� get --global tnet/tools/bash credential.usernrm (dns block)
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node node /home/REDACTED/work/Tooda/Tooda/node_modules/.bin/astro dev git clon�� -b ntu1_all.deb ash --depth 2 REDACTED git conf�� 64.deb --global de/node/bin/sh pull.rebase (dns block)
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node node /home/REDACTED/work/Tooda/Tooda/node_modules/.bin/astro dev git conf�� tu2_all.deb --global -recommends libasound2t64 libatk--force-confdef pull.rebase (dns block)
• tooda
  • Triggering command: /home/REDACTED/.cache/ms-playwright/chromium_headless_shell-1208/chrome-headless-shell-linux64/chrome-headless-shell /home/REDACTED/.cache/ms-playwright/chromium_headless_shell-1208/chrome-headless-shell-linux64/chrome-headless-shell --disable-field-trial-config --disable-REDACTED-networking --disable-REDACTED-timer-throttling --disable-REDACTEDing-occluded-windows --disable-back-forward-cache --disable-breakpad --disable-client-side-phishing-detection --disable-component-extensions-with-REDACTED-pages --disable-component-update --no-default-browser-check --disable-default-apps --disable-dev-shm-usage --disable-extensions --disable-features=AvoidUnnecessaryBeforeUnloadCheckSync,BoundaryEventDispatchTracksNodeRemoval,DestroyProfileOnBrowserClose,DialMediaRouteProvider,GlobalMediaControls,HttpsUpgrades,LensOverlay,MediaRouter,PaintHolding,ThirdPartyStoragePartitioning,Transl /usr/bin/cat (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

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