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679af0fb4b
When building for wasm32v1-none with Cargo, the 'std' feature gets unified across the dependency graph, meaning serde_core sees feature="std" even on a no_std target. This caused compilation failures because the crate tried to use std:: imports. This commit fixes the issue by checking target_os = "none" in addition to the std feature flag: - lib.rs: Force no_std when target_os = "none" - crate_root.rs: Use core/alloc instead of std on target_os = "none" - All std-only cfg blocks now include not(target_os = "none") - Add explicit prelude imports for wasm32v1-none compatibility