fix: add --all to cargo fmt in script/test and autoformat codebase

cargo fmt without --all fails with "Failed to find targets" in
workspace repos. This was blocking every story's gates. Also ran
cargo fmt --all to fix all existing formatting issues.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

server/src/chat/commands/ambient.rs

@@ -69,7 +69,10 @@ mod tests {
         // "timmy ambient on" — bot name mentioned but not @-prefixed, so
         // is_addressed is false; strip_bot_mention still strips "timmy ".
         let result = try_handle_command(&dispatch, "timmy ambient on");
-        assert!(result.is_some(), "ambient on should fire even when is_addressed=false");
+        assert!(
+            result.is_some(),
+            "ambient on should fire even when is_addressed=false"
+        );
         assert!(
             ambient_rooms.lock().unwrap().contains(&room_id),
             "room should be in ambient_rooms after ambient on"
@@ -92,7 +95,10 @@ mod tests {
         };
         // Bare "ambient off" in an ambient room (is_addressed=false).
         let result = try_handle_command(&dispatch, "ambient off");
-        assert!(result.is_some(), "bare ambient off should be handled without LLM");
+        assert!(
+            result.is_some(),
+            "bare ambient off should be handled without LLM"
+        );
         let output = result.unwrap();
         assert!(
             output.contains("Ambient mode off"),
@@ -161,7 +167,11 @@ mod tests {
 
     #[test]
     fn ambient_invalid_args_returns_usage() {
-        let result = super::super::tests::try_cmd_addressed("Timmy", "@timmy:homeserver.local", "@timmy ambient");
+        let result = super::super::tests::try_cmd_addressed(
+            "Timmy",
+            "@timmy:homeserver.local",
+            "@timmy ambient",
+        );
         let output = result.unwrap();
         assert!(
             output.contains("Usage"),