refactor(preg): back PregMatches with regex::Captures

PregMatches was an IndexMap of owned Strings copied out of the match, so
every preg_match2/preg_replace_callback call allocated a String per
capture group (twice over for a named group) whether or not the caller
read it. It now wraps the regex::Captures itself, held alongside the
pattern it came from so groups stay reachable by both their named and
their numbered form, and hands out &str borrowed from the subject. The
subject's lifetime becomes a parameter of the type.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

3 files changed, 21 insertions, 17 deletions

diff --git a/crates/shirabe-symfony-console/src/formatter/output_formatter.rs b/crates/shirabe-symfony-console/src/formatter/output_formatter.rs
index 1153bc9e..571d66c0 100644
--- a/crates/shirabe-symfony-console/src/formatter/output_formatter.rs
+++ b/crates/shirabe-symfony-console/src/formatter/output_formatter.rs
@@ -321,7 +321,9 @@ impl WrappableOutputFormatterInterface for OutputFormatter {
             // opening tag?
             let open = shirabe_php_shim::byte_at(&text, 1) != b'/';
             let tag = if open {
-                matches[&CaptureKey::ByIndex(1)][i]
+                matches
+                    .get(&CaptureKey::ByIndex(1))
+                    .expect("group 1 exists in the tag pattern")[i]
                     .0
                     .clone()
                     .expect("group 1 participates whenever the pattern matches")
diff --git a/crates/shirabe-symfony-console/src/helper/progress_bar.rs b/crates/shirabe-symfony-console/src/helper/progress_bar.rs
index 4764d617..7a7a3c53 100644
--- a/crates/shirabe-symfony-console/src/helper/progress_bar.rs
+++ b/crates/shirabe-symfony-console/src/helper/progress_bar.rs
@@ -799,7 +799,10 @@ impl ProgressBar {
 
         // $callback in PHP, expressed as a closure over $this and the matches.
         let callback = |matches: &PregMatches| -> anyhow::Result<String> {
-            let name = matches[&CaptureKey::ByIndex(1)].clone().unwrap_or_default();
+            let name = matches
+                .get(&CaptureKey::ByIndex(1))
+                .unwrap_or_default()
+                .to_string();
 
             let text: shirabe_php_shim::PhpMixed =
                 if Self::get_placeholder_formatter_definition(&name).is_some() {
@@ -813,10 +816,13 @@ impl ProgressBar {
                 } else if let Some(message) = self.messages.get(&name) {
                     shirabe_php_shim::PhpMixed::String(message.clone())
                 } else {
-                    return Ok(matches[&CaptureKey::ByIndex(0)].clone().unwrap_or_default());
+                    return Ok(matches
+                        .get(&CaptureKey::ByIndex(0))
+                        .unwrap_or_default()
+                        .to_string());
                 };
 
-            if let Some(modifier) = matches.get(&CaptureKey::ByIndex(2)).and_then(|m| m.clone()) {
+            if let Some(modifier) = matches.get(&CaptureKey::ByIndex(2)) {
                 return Ok(shirabe_php_shim::sprintf(&format!("%{modifier}"), &[text]));
             }
 
diff --git a/crates/shirabe-symfony-console/src/input/string_input.rs b/crates/shirabe-symfony-console/src/input/string_input.rs
index b0c3b159..0dcc1a9d 100644
--- a/crates/shirabe-symfony-console/src/input/string_input.rs
+++ b/crates/shirabe-symfony-console/src/input/string_input.rs
@@ -61,15 +61,14 @@ impl StringInput {
                 if token.is_some() {
                     tokens.push(token.take().unwrap());
                 }
-                cursor +=
-                    shirabe_php_shim::strlen(m[&CaptureKey::ByIndex(0)].as_deref().unwrap_or(""));
+                cursor += shirabe_php_shim::strlen(m.get(&CaptureKey::ByIndex(0)).unwrap_or(""));
             } else if let Some(m) = preg_match2(
                 format!(r#"/([^="'\s]+?)(=?)({}+)/A"#, Self::REGEX_QUOTED_STRING),
                 input,
                 cursor as usize,
             ) {
                 let inner = shirabe_php_shim::substr(
-                    m[&CaptureKey::ByIndex(3)].as_deref().unwrap_or(""),
+                    m.get(&CaptureKey::ByIndex(3)).unwrap_or(""),
                     1,
                     Some(-1),
                 );
@@ -78,12 +77,11 @@ impl StringInput {
                 token = Some(format!(
                     "{}{}{}{}",
                     token.unwrap_or_default(),
-                    m[&CaptureKey::ByIndex(1)].as_deref().unwrap_or(""),
-                    m[&CaptureKey::ByIndex(2)].as_deref().unwrap_or(""),
+                    m.get(&CaptureKey::ByIndex(1)).unwrap_or(""),
+                    m.get(&CaptureKey::ByIndex(2)).unwrap_or(""),
                     shirabe_php_shim::stripcslashes(&replaced)
                 ));
-                cursor +=
-                    shirabe_php_shim::strlen(m[&CaptureKey::ByIndex(0)].as_deref().unwrap_or(""));
+                cursor += shirabe_php_shim::strlen(m.get(&CaptureKey::ByIndex(0)).unwrap_or(""));
             } else if let Some(m) = preg_match2(
                 format!(r"/{}/A", Self::REGEX_QUOTED_STRING),
                 input,
@@ -93,13 +91,12 @@ impl StringInput {
                     "{}{}",
                     token.unwrap_or_default(),
                     shirabe_php_shim::stripcslashes(&shirabe_php_shim::substr(
-                        m[&CaptureKey::ByIndex(0)].as_deref().unwrap_or(""),
+                        m.get(&CaptureKey::ByIndex(0)).unwrap_or(""),
                         1,
                         Some(-1)
                     ))
                 ));
-                cursor +=
-                    shirabe_php_shim::strlen(m[&CaptureKey::ByIndex(0)].as_deref().unwrap_or(""));
+                cursor += shirabe_php_shim::strlen(m.get(&CaptureKey::ByIndex(0)).unwrap_or(""));
             } else if let Some(m) = preg_match2(
                 format!(r"/{}/A", Self::REGEX_UNQUOTED_STRING),
                 input,
@@ -108,10 +105,9 @@ impl StringInput {
                 token = Some(format!(
                     "{}{}",
                     token.unwrap_or_default(),
-                    m[&CaptureKey::ByIndex(1)].as_deref().unwrap_or("")
+                    m.get(&CaptureKey::ByIndex(1)).unwrap_or("")
                 ));
-                cursor +=
-                    shirabe_php_shim::strlen(m[&CaptureKey::ByIndex(0)].as_deref().unwrap_or(""));
+                cursor += shirabe_php_shim::strlen(m.get(&CaptureKey::ByIndex(0)).unwrap_or(""));
             } else {
                 // should never happen
                 return Err(InvalidArgumentException::new(format!(