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/show.rs

@@ -78,9 +78,16 @@ mod tests {
 
     #[test]
     fn show_command_appears_in_help() {
-        let result = super::super::tests::try_cmd_addressed("Timmy", "@timmy:homeserver.local", "@timmy help");
+        let result = super::super::tests::try_cmd_addressed(
+            "Timmy",
+            "@timmy:homeserver.local",
+            "@timmy help",
+        );
         let output = result.unwrap();
-        assert!(output.contains("show"), "help should list show command: {output}");
+        assert!(
+            output.contains("show"),
+            "help should list show command: {output}"
+        );
     }
 
     #[test]
@@ -167,7 +174,11 @@ mod tests {
 
     #[test]
     fn show_command_case_insensitive() {
-        let result = super::super::tests::try_cmd_addressed("Timmy", "@timmy:homeserver.local", "@timmy SHOW 1");
+        let result = super::super::tests::try_cmd_addressed(
+            "Timmy",
+            "@timmy:homeserver.local",
+            "@timmy SHOW 1",
+        );
         assert!(result.is_some(), "SHOW should match case-insensitively");
     }
 }