refactor(timeline): bump as_variant and make more use of its pattern matching form

Cargo.lock

@@ -200,9 +200,9 @@ dependencies = [
 
 [[package]]
 name = "as_variant"
-version = "1.2.0"
+version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f38fa22307249f86fb7fad906fcae77f2564caeb56d7209103c551cd1cf4798f"
+checksum = "9dbc3a507a82b17ba0d98f6ce8fd6954ea0c8152e98009d36a40d8dcc8ce078a"
 
 [[package]]
 name = "askama"

Cargo.toml

@@ -29,7 +29,7 @@ assert_matches2 = "0.1.2"
 async-rx = "0.1.3"
 async-stream = "0.3.5"
 async-trait = "0.1.85"
-as_variant = "1.2.0"
+as_variant = "1.3.0"
 base64 = "0.22.1"
 byteorder = "1.5.0"
 chrono = "0.4.39"

crates/matrix-sdk-ui/src/timeline/event_item/content/mod.rs

@@ -333,19 +333,15 @@ impl TimelineItemContent {
     /// If `self` is of the [`Aggregated`][Self::Aggregated] variant, return the
     /// inner [`Message`].
     pub fn as_message(&self) -> Option<&Message> {
-        let aggregated = as_variant!(self, Self::Aggregated)
-            .map(|f| as_variant!(&f.kind, AggregatedTimelineItemContentKind::Message));
-
-        aggregated.unwrap_or(None)
+        let aggregated = as_variant!(self, Self::Aggregated)?;
+        as_variant!(&aggregated.kind, AggregatedTimelineItemContentKind::Message)
     }
 
     /// If `self` is of the [`Aggregated`][Self::Aggregated] variant, return the
     /// inner [`PollState`].
     pub fn as_poll(&self) -> Option<&PollState> {
-        let aggregated = as_variant!(self, Self::Aggregated)
-            .map(|f| as_variant!(&f.kind, AggregatedTimelineItemContentKind::Poll));
-
-        aggregated.unwrap_or(None)
+        let aggregated = as_variant!(self, Self::Aggregated)?;
+        as_variant!(&aggregated.kind, AggregatedTimelineItemContentKind::Poll)
     }
 
     /// If `self` is of the [`UnableToDecrypt`][Self::UnableToDecrypt] variant,
@@ -509,12 +505,12 @@ impl TimelineItemContent {
 
     /// Event ID of the thread root, if this is a threaded message.
     pub fn thread_root(&self) -> Option<OwnedEventId> {
-        as_variant!(self, TimelineItemContent::Aggregated).and_then(|agg| agg.thread_root.clone())
+        as_variant!(self, Self::Aggregated)?.thread_root.clone()
     }
 
     /// Get the event this message is replying to, if any.
     pub fn in_reply_to(&self) -> Option<InReplyToDetails> {
-        as_variant!(self, TimelineItemContent::Aggregated).and_then(|agg| agg.in_reply_to.clone())
+        as_variant!(self, Self::Aggregated)?.in_reply_to.clone()
     }
 
     /// Return the reactions, grouped by key and then by sender, for a given