Use direct matching in mixed quoted text hook

crates/oa-core/src/language.rs

@@ -1221,14 +1221,11 @@ impl Parser<'_> {
             return Err(self.error("Expected a double-quoted string."));
         }
         #[cfg(test)]
-        if self.mixed.is_some() {
-            let span = self.current().span;
+        let span = self.current().span;
+        #[cfg(test)]
+        if let Some(mixed) = &mut self.mixed {
             let raw = &self.source[span.start..span.end];
-            let value = self
-                .mixed
-                .as_mut()
-                .expect("mixed quoted consumer")
-                .quoted_text(raw, span)?;
+            let value = mixed.quoted_text(raw, span)?;
             self.cursor += 1;
             return Ok(value);
         }

harness/analysis-text-producer-implementation-20260925.md

@@ -24,3 +24,9 @@ All new names are under `mixed::carried::text_producer`, selected by filter `tex
 - Project and typed duplicate descriptions with enough room for the first grammar decode but not a second, asserting the existing duplicate errors rather than a false successful overwrite.
 
 No old test or worker-stack allowance changed. Implementer ran no Cargo, test executable or rustfmt; parent owns formatting, compiler, prologue/headroom and runtime gates. Independent production review found no initial semantic blocker; final review binds parent-formatted source and authored tests before commit. Preserve all prior recorded failures and compare actual full-suite dispositions rather than claiming they are unchanged from source inspection.
+
+Parent gates at initial source6b0ef99 passed all six focused tests and completed
+the full library with259 passed /16 inherited failures. Strict Clippy rejected
+the ordinary quoted hook's is_some/expect pattern. The successor uses direct
+if-let matching with the same token span and decoder; no tests, limits or
+accounting operations changed. Final source gates remain separately required.