fix: enforce lowercase asset filenames

[bearpong]

What

All files under src/assets/** are now lowercase, and the Cloudflare upload forces lowercase ids regardless of how a contributor names the file.

Why

Cloudflare image ids are case-sensitive, so tokens/0xABC….png and tokens/0xabc….png are two different images for the same address. The repo had both conventions live at once — roughly 60% checksummed, 40% lowercase — while logoURI had already drifted to lowercase almost everywhere (only 4 mixed-case URLs left). So for most assets the committed filename and the published URL disagreed.

The checksum validation we had was never enforcing this: it calls viem's isAddress, which short-circuits to true for any all-lowercase address before it ever checks the checksum. Lowercase filenames passed the "EIP-55 required" gate silently.

11 addresses were also tracked twice, under both casings with identical blobs. macOS core.ignorecase hides that, so git status looked clean.

How

• Renamed 202 assets to lowercase, dropped the 11 duplicate index entries (kept the lowercase twin, content is byte-identical)
• uploadAssets.ts lowercases the filename before building the CF id. Removed the EIP-55 check that came with it since it validated nothing
• validateImages.ts now errors on any mixed-case asset filename, with the corrected name in the message
• logoURI schema patterns tightened to [0-9a-f]
• Lowercased the 4 remaining mixed-case logoURIs in src/tokens/mainnet.json
• Docs: CONTRIBUTING, AGENTS, generate-vault-pair-image skill

Also fixes

validateMetadataImages looked up assets by the checksummed metadata address, so on Linux CI it never matched a lowercase-named file and downgraded to a warning. Lowercased the lookup — missing assets on a case-sensitive FS drops 189 → 161 (the rest genuinely have no committed image).

Note for review

Needs cloudflare-uploads approval. That job re-uploads all 202 renamed assets under their lowercase ids. The 4 logoURIs changed here 404 until it runs, since those images only exist on CF under mixed-case ids atm. Old ids stay orphaned but keep working for anyone still hitting them.

[Copilot]

Pull request overview

This PR standardizes Berachain metadata image handling by enforcing lowercase asset filenames and Cloudflare Images IDs to avoid case-sensitive duplicates and mismatches between committed assets and published logoURIs.

Changes:

• Lowercased remaining mixed-case logoURIs in src/tokens/mainnet.json and tightened JSON schema logoURI patterns to require lowercase hex addresses.
• Updated image validation and Cloudflare upload scripts to enforce/assume lowercase asset filenames and to lowercase Cloudflare image IDs.
• Updated contributor/docs and the vault-pair image generation skill to reflect the lowercase filename requirement.

Reviewed changes

Copilot reviewed 9 out of 222 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/tokens/mainnet.json	Lowercases 4 remaining mixed-case logoURI paths to match lowercase asset IDs.
scripts/validateImages.ts	Enforces lowercase asset filenames and lowercases metadata-address lookups when resolving asset paths.
scripts/uploadAssets.ts	Lowercases the Cloudflare upload ID filename component and removes ineffective EIP-55 filename validation.
schemas/tokens.schema.json	Requires lowercase hex addresses in logoURI patterns.
schemas/vaults.schema.json	Requires lowercase hex addresses in logoURI patterns.
schemas/validators.schema.json	Requires lowercase hex addresses in logoURI patterns.
skills/generate-vault-pair-image/SKILL.md	Updates instructions/examples to use lowercased vault/token asset filenames and logoURIs.
CONTRIBUTING.md	Documents lowercase asset filename requirement for new images.
AGENTS.md	Documents lowercase asset filename requirement and Cloudflare case-sensitivity rationale.
src/assets/vaults/0xc6de36eced67db9c17919708865b3ee94a7d987c.png	Adds/updates a vault asset with a lowercase filename.
src/assets/vaults/0x5540e29749f6c8f5dcf49fcc17c67e97a8e7335b.png	Adds/updates a vault asset with a lowercase filename.
src/assets/vaults/0x3d0d211365c8a483394426dacd5a73b0154feedb.png	Adds/updates a vault asset with a lowercase filename.
src/assets/vaults/0x347106734e7b129dde92333a0007d64a4b08e266.png	Adds/updates a vault asset with a lowercase filename.
src/assets/tokens/0xf9ee98099f5078078bb8e17e6b4a4f95137e2037.png	Adds/updates a token asset with a lowercase filename.
src/assets/tokens/0x75a226792e574918855740ebe24ad2f06d4d0fb9.png	Adds/updates a token asset with a lowercase filename.
src/assets/tokens/0x6698ede14709a9dd8379744cc2d28f276e3d2eac.png	Adds/updates a token asset with a lowercase filename.

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