fix(code-def): surface method/constructor/field/struct definitions (#1628)

DEF_TYPES listed only canonical symbol-type names (function, class, interface, ...). But normalizeSymbolType in the code chunker canonicalizes only some tree-sitter node types and lets the rest fall through type.replace(/_/g, ' '). So method_declaration is stored as 'method declaration', struct_specifier as 'struct specifier', protocol_declaration as 'protocol declaration'. None were in DEF_TYPES, so code-def returned 0 hits for every method, constructor, field, C struct, and Swift protocol. The plain 'struct' entry never matched either. Add the fallthrough definition forms. Read-path only; no reindex needed (0 -> N on existing indexes).

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Co-authored-by: Time Attakc <89218912+time-attack@users.noreply.github.com>

src/commands/code-def.ts

@@ -37,9 +37,19 @@ export async function findCodeDef(
   // trigger) are first-class definitions in the SQL sense. The chunker's
   // normalizeSymbolType maps create_table → 'table' etc, so adding the SQL
   // kinds here is what makes `gbrain code-def users` work against SQL.
+  // Method-level + member definitions. normalizeSymbolType only canonicalizes
+  // some node types; the rest fall through `type.replace(/_/g, ' ')`, so
+  // tree-sitter's method_declaration → 'method declaration', struct_specifier →
+  // 'struct specifier', protocol_declaration → 'protocol declaration', etc.
+  // Without these, code-def is blind to every method, constructor, field, C
+  // struct, and Swift protocol — which is most of an OO codebase. The plain
+  // 'struct' entry above never matched for the same reason (C emits the
+  // 'struct specifier' fallback form).
   const DEF_TYPES = [
     'function', 'class', 'interface', 'type', 'enum', 'struct', 'trait', 'module', 'contract',
     'table', 'view', 'index', 'procedure', 'schema', 'database', 'trigger',
+    'method declaration', 'method definition', 'constructor declaration',
+    'field declaration', 'field definition', 'struct specifier', 'protocol declaration',
   ];
   const params: unknown[] = [symbol, limit];
   let whereLang = '';