[Term Entry] Add Postel's Law

[AnamolR]

Description

This PR adds a new UX design principle entry titled Postel’s Law (also known as the Robustness Principle) to the uiux/concepts/ux-psychology/terms/ section.

New folder: content/uiux/concepts/ux-psychology/terms/postels-law/
Markdown file: postels-law.md introduces the principle, explains its relevance to UX, highlights practical applications in interface and input design, and outlines benefits and limitations.

This entry follows the same tone, structure, and formatting conventions used in other UX laws and cognitive principles.

Issues Solved

Closes #6593

Type of Change

Adding a new entry

Checklist

• All writings are my own.
• My entry follows the Codecademy Docs style guide.
• My changes generate no new warnings.
• I have performed a self-review of my own writing and code.
• I have checked my entry and corrected any misspellings.
• I have made corresponding changes to the documentation if needed.
• I have confirmed my changes are not being pushed from my forked main branch.
• I have confirmed that I'm pushing from a new branch named after the changes I'm making.
• I have linked any issues that are relevant to this PR in the Issues Solved section.

[AnamolR]

Hi @dakshdeepHERE could you please look into this?

[mamtawardhani]

Hey @AnamolR, please include a section for "Examples of Postel’s Law in Practice", and please add the bullet points based on the structure followed at Codecademy.

Once these changes are addressed, let me know.

[AnamolR]

Hi @mamtawardhani, I've added examples based on your request. Please check ✌️

[mamtawardhani]

Hey @AnamolR the entry looks good but please add the image on the branch. Let me know once done.

[AnamolR]

Hi @mamtawardhani, the image was missing but I've added it. All done now 🙂

[mamtawardhani]

Hey @AnamolR For Postal’s Law, a better image would be something like:

• A heatmap showing where users’ eyes naturally go on a webpage.
• A UI layout with highlighted top-left and bottom-right zones to show attention concentration.
• A diagram showing the “reading triangle” path.

Please change the image

[AnamolR]

Hi @mamtawardhani, Heatmaps and eye-tracking visuals are great for explaining visual hierarchy or how users scan a page. But for Postel’s Law, we’re focusing more on input flexibility and system responsiveness, like search suggestions (as in the image I added), forgiving form inputs, autocorrect, etc. So a visual showing flexible input → structured output is more relevant to this principle than eye-scanning behavior. Could you please take another look? There are already other docs where heatmaps and eye-tracking are used more appropriately.

[mamtawardhani]

Looks good for a second review! 🚀

[Sriparno08]

Looks good, @AnamolR!

[github-actions]

👋 @AnamolR
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