fix(code): make PR diff source consistent with PR badge

[adboio]

Problem

sometimes, you'll see a PR badge in the top right, but then the diff panel shows no option to view the PR diff

Changes

updates diff panel to read PR URL from DB if we have it

How did you test this?

manally

Automatic notifications

• Publish to changelog?
• Alert Sales and Marketing teams?

[adboio]

• fix(code): make PR diff source consistent with PR badge #2529 👈 (View in Graphite)
• main

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[github-actions]

React Doctor found no issues in the changed files. 🎉

_{Reviewed by React Doctor for commit 57ed575.}

[greptile-apps]

_{Reviews (1): Last reviewed commit: "fix(code): make PR diff source consisten..." | Re-trigger Greptile}