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/transport/slack/format.rs

@@ -20,10 +20,8 @@ pub fn markdown_to_slack(text: &str) -> String {
         LazyLock::new(|| Regex::new(r"(?m)^#{1,6}\s+(.+)$").unwrap());
     static RE_BOLD_ITALIC: LazyLock<Regex> =
         LazyLock::new(|| Regex::new(r"\*\*\*(.+?)\*\*\*").unwrap());
-    static RE_BOLD: LazyLock<Regex> =
-        LazyLock::new(|| Regex::new(r"\*\*(.+?)\*\*").unwrap());
-    static RE_STRIKETHROUGH: LazyLock<Regex> =
-        LazyLock::new(|| Regex::new(r"~~(.+?)~~").unwrap());
+    static RE_BOLD: LazyLock<Regex> = LazyLock::new(|| Regex::new(r"\*\*(.+?)\*\*").unwrap());
+    static RE_STRIKETHROUGH: LazyLock<Regex> = LazyLock::new(|| Regex::new(r"~~(.+?)~~").unwrap());
     static RE_LINK: LazyLock<Regex> =
         LazyLock::new(|| Regex::new(r"\[([^\]]+)\]\(([^)]+)\)").unwrap());
 
@@ -105,8 +103,14 @@ mod tests {
     fn slack_fenced_code_block_preserved() {
         let input = "```rust\nlet x = 1;\n```";
         let output = markdown_to_slack(input);
-        assert!(output.contains("let x = 1;"), "code block content must be preserved");
-        assert!(output.contains("```"), "fenced code delimiters must be preserved");
+        assert!(
+            output.contains("let x = 1;"),
+            "code block content must be preserved"
+        );
+        assert!(
+            output.contains("```"),
+            "fenced code delimiters must be preserved"
+        );
     }
 
     #[test]