v2.5.3

Changes

• chore(release): v2.5.3 (#13617) @sbpublic
• chore(backend): provision the signing allowance only via allow_signing (#13612) @sbpublic
• feat(frontend): move the collectibles check action into the hero (#13608) @sbpublic
• fix(frontend): dedupe custom tokens sharing an identifier in one setAll batch (#13616) @claude[bot]
• feat(frontend): move NFT grouping toggle below the hero (#13589) @sbpublic
• chore(frontend): rename "NFT" to "Collectible" across the app (#13585) @sbpublic
• chore(frontend): Extend sprinkles episode (#13611) @sbpublic
• chore(scripts): update LLM canister release URL (#13610) @sbpublic