OTWO-7742 Remove Gravatar dependency in accounts page

[Niharika1117]

No description provided.

[Copilot]

🟡 Changes recommended

Unresolved asset paths break admin avatar images and account Twitter image metadata.

1 open finding

• Resolve anonymous image path to an absolute URL · New

What changed in this PR

Removes Gravatar requests from the shared avatar helper, replacing account avatars with local anonymous images.

Changes:

• Returns anonymous images instead of Gravatar URLs.
• Updates tests for local fallback images and size clamping.

File	Description
test/​helpers/​avatar_helper_test.rb	Updates fallback image and size assertions.
app/​helpers/​avatar_helper.rb	Replaces Gravatar URLs with anonymous asset paths.

🧠 Review effort: Balanced

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[Copilot]

🟡 Changes recommended

Configuring an asset host still routes account avatars through Gravatar.

1 open finding

• Use anonymous_image_url unconditionally when asset_host is configured · New

1 resolved since last review

• Resolve anonymous image path to an absolute URL

🧠 Review effort: Balanced

[Copilot]

🟡 Changes recommended

Direct URL consumers lose anonymous-avatar fallbacks, and the account header no longer respects mobile avatar sizing.

3 open issues

• Shared Gravatar URL change breaks fallback avatars for direct consumers · New
• Inline avatar dimensions override mobile responsive sizing · New
• Use anonymous_image_url unconditionally when asset_host is configured

_{Review effort: Balanced}