Content Likes (contracts/content-likes/src/lib.rs)

Like/unlike with pagination.

Methods

Method	Args	Returns	Auth	Example Invoke	Expected Events
`like`	`user: Address, content_id: u32`	`()` (idempotent)	user	`soroban contract invoke ... like -- USER 123`	`("liked", content_id) -> user`
`unlike`	`user: Address, content_id: u32`	`()`	user	`soroban contract invoke ... unlike -- USER 123`	`("unliked", content_id) -> user`
`like_count`	`content_id: u32`	`u32`	none	`soroban contract invoke ... like_count -- 123`	None
`has_liked`	`user: Address, content_id: u32`	`bool`	none	`soroban contract invoke ... has_liked -- USER 123`	None
`list_likes_by_user`	`user: Address, cursor: u32, limit: u32`	`(Vec<u32>, bool)`	none	`soroban contract invoke ... list_likes_by_user -- USER 0 10`	None

Idempotent likes; bounded pagination (max 100). Map storage per content.