feat: clean up some image assets and async load some stuff on homepage

[xtbase]

What changed? Why?

• optimize some assets by converting to avif
• async load some components on homepage
• fix gas dropdown breaking things on homepage

Notes to reviewers

How has it been tested?

Have you tested the following pages?

BaseWeb

• [] base.org
• [] base.org/names
• [] base.org/builders
• [] base.org/ecosystem
• [] base.org/name/jesse
• [] base.org/manage-names
• [] base.org/resources

[cb-heimdall]

✅ Heimdall Review Status

Requirement	Status	More Info
Reviews	✅ 1/1	Denominator calculation Show calculation 1 if user is bot 0 1 if user is external 0 2 if repo is sensitive 0 From .codeflow.yml 1 Additional review requirements Show calculation Max 0 0 From CODEOWNERS 0 Global minimum 0 Max 1 1 1 if commit is unverified 0 Sum 1

[vercel]

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Approved review 3290579297 from aayushijain21 is now dismissed due to new commit. Re-request for approval.

[vercel]

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Project	Deployment	Preview	Comments	Updated (UTC)
base-web	Ready	Preview	Comment	Oct 2, 2025 4:12pm

Approved review 3291249242 from aayushijain21 is now dismissed due to new commit. Re-request for approval.

Approved review 3291707802 from dgca is now dismissed due to new commit. Re-request for approval.