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/util.rs

@@ -202,9 +202,7 @@ pub fn normalize_line_breaks(text: &str) -> String {
             return true;
         }
         // Horizontal rules: lines made entirely of -, *, or _ (at least 3 chars).
-        let all_hr_chars = trimmed
-            .chars()
-            .all(|c| matches!(c, '-' | '*' | '_' | ' '));
+        let all_hr_chars = trimmed.chars().all(|c| matches!(c, '-' | '*' | '_' | ' '));
         let hr_char_count = trimmed.chars().filter(|c| !c.is_whitespace()).count();
         all_hr_chars && hr_char_count >= 3
     }
@@ -389,11 +387,7 @@ mod tests {
     #[test]
     fn strip_mention_emoji_display_name_no_separator() {
         // Display name with emoji, no separator
-        let rest = strip_bot_mention(
-            "timmy ⚡️ ambient on",
-            "timmy ⚡️",
-            "@timmy:homeserver.local",
-        );
+        let rest = strip_bot_mention("timmy ⚡️ ambient on", "timmy ⚡️", "@timmy:homeserver.local");
         assert_eq!(rest, "ambient on");
     }
 
@@ -638,9 +632,18 @@ mod tests {
         let output = normalize_line_breaks(input);
         // Prose sentences before and after the code block get doubled.
         // The code block itself is preserved.
-        assert!(output.contains("First sentence.\n\nSecond sentence."), "prose before code: {output}");
-        assert!(output.contains("```rust\nlet x = 1;\nlet y = 2;\n```"), "code block preserved: {output}");
-        assert!(output.contains("Third sentence.\n\nFourth sentence."), "prose after code: {output}");
+        assert!(
+            output.contains("First sentence.\n\nSecond sentence."),
+            "prose before code: {output}"
+        );
+        assert!(
+            output.contains("```rust\nlet x = 1;\nlet y = 2;\n```"),
+            "code block preserved: {output}"
+        );
+        assert!(
+            output.contains("Third sentence.\n\nFourth sentence."),
+            "prose after code: {output}"
+        );
     }
 
     #[test]