Fix: update Twitter icon to X branding for official FOSSASIA links

[radhishmahajan]

• Included a Preview link and screenshot showing after and before the changes.
• Included a description of the change below.
• Squashed the commits.

Changes done in this Pull Request

• Fixes Update Twitter icon to X branding in footer #99

Description / Changes

This PR updates the Twitter icon to reflect the new "X" branding for the official FOSSASIA social media links.

The previous Twitter font icon has been replaced with the official X SVG logo to ensure accurate branding and better visual consistency.

The changes are limited only to the official FOSSASIA Twitter links in the main social sections (header/footer). Speaker profile links and metadata have not been modified, as they are outside the scope of this issue.

No third-party icon libraries were modified.

Screenshots if any:

Before:

The official social section displayed the old Twitter bird icon.

After:

The official social section now displays the updated X branding logo.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Updates the FOSSASIA official Twitter social links in key HTML pages to use an "X" text-based representation instead of the old Twitter bird icon, limited to the main social sections only.

File-Level Changes

Change	Details	Files
Replace the Twitter bird icon with an "X" text label for official FOSSASIA Twitter links in main social sections.	Update the 404 page social bar Twitter entry to render a bold "X" instead of the social_twitter icon element. Update the 500 page social bar Twitter entry to render a bold "X" instead of the social_twitter icon element. Update the primary index page header social links to show a bold "X" for the Twitter link instead of the social_twitter icon.	404.html 500.html index1.html

Assessment against linked issues

Issue	Objective	Addressed	Explanation
#99	Replace the old Twitter bird icon with the new X branding for the Twitter link in the site footer (and related main social sections).	✅
#99	Keep styling of the updated X icon consistent with the existing social icons in the footer.	❌	The PR replaces the icon element <i class="icon social_twitter"></i> with a bold text span <span style="font-weight:bold;">X</span>, while the other social links still use icon font classes (e.g., social_facebook, social_youtube). This is likely to result in a visually different style and alignment compared to the other social icons, so styling consistency is not maintained.

Possibly linked issues

• Update Twitter icon to X branding in footer #99: They are the same task: replacing FOSSASIA’s old Twitter bird icon with the new X branding icon.

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[sourcery-ai]

Hey - I've left some high level feedback:

• In 404.html the updated link markup has a typo (<<span ...>) which will render invalid HTML; drop the extra < so the span is parsed correctly.
• Instead of inlining a bold X text node, consider using a reusable CSS class or icon (e.g., replacing social_twitter with a new social_x class) so the social icons remain visually consistent and easier to adjust across the site.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- In 404.html the updated link markup has a typo (`<<span ...>`) which will render invalid HTML; drop the extra `<` so the span is parsed correctly.
- Instead of inlining a bold `X` text node, consider using a reusable CSS class or icon (e.g., replacing `social_twitter` with a new `social_x` class) so the social icons remain visually consistent and easier to adjust across the site.

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[radhishmahajan]

Thank you for the feedback.

I have corrected the typo in 404.html and replaced the inline styling with a reusable social_x CSS class to keep the implementation consistent with the existing icon structure.

Please let me know if any further improvements are needed.

[radhishmahajan]

i had updated the code with svg for more correct and exact icon