add: don't allow poll creator to vote

add: unfollow user when you block them
add: force other user to unfollow you by blocking them
add: leave receiver communities when you block them

crates/app/src/routes/api/v1/mod.rs

@@ -429,6 +429,8 @@ pub struct CreatePostPoll {
     pub option_b: String,
     pub option_c: String,
     pub option_d: String,
+    #[serde(default)]
+    pub expires: Option<usize>,
 }
 
 #[derive(Deserialize)]