refactor: 清理未使用符号，合并bind_constructor宏，统一init/rebind绑定列表，bind_number改为表驱动

crates/oxide_kernel/src/builtin.rs

@@ -144,20 +144,6 @@ pub struct RegExpMethods {
     pub to_string: *const (),
 }
 
-pub struct NumberMethods {
-    pub is_nan: *const (),
-    pub is_finite: *const (),
-    pub parse_int: *const (),
-    pub parse_float: *const (),
-    pub to_string: *const (),
-    pub to_fixed: *const (),
-    pub is_integer: *const (),
-    pub is_safe_integer: *const (),
-    pub to_exponential: *const (),
-    pub to_precision: *const (),
-    pub value_of: *const (),
-}
-
 pub struct FunctionMethods {
     pub call: *const (),
     pub apply: *const (),
@@ -979,36 +965,6 @@ impl BuiltinWorld {
         );
     }
 
-    pub fn bind_number_methods(&self, methods: &NumberMethods, string_forge: &StringForge, shape_forge: &ShapeForge) {
-        let ctor_ptr = P::as_ptr(&self.number_constructor) as *mut JsObject;
-        let ctor = unsafe { &mut *ctor_ptr };
-        let proto_ptr = P::as_ptr(&self.number_proto) as *mut JsObject;
-        let proto = unsafe { &mut *proto_ptr };
-        bind_methods!(
-            self,
-            ctor,
-            string_forge,
-            shape_forge,
-            ("isNaN", methods.is_nan, 1),
-            ("isFinite", methods.is_finite, 1),
-            ("parseInt", methods.parse_int, 1),
-            ("parseFloat", methods.parse_float, 1),
-            ("isInteger", methods.is_integer, 1),
-            ("isSafeInteger", methods.is_safe_integer, 1),
-        );
-        bind_methods!(
-            self,
-            proto,
-            string_forge,
-            shape_forge,
-            ("toString", methods.to_string, 0),
-            ("toFixed", methods.to_fixed, 0),
-            ("toExponential", methods.to_exponential, 0),
-            ("toPrecision", methods.to_precision, 0),
-            ("valueOf", methods.value_of, 0),
-        );
-    }
-
     pub fn bind_function_methods(
         &self, methods: &FunctionMethods, string_forge: &StringForge, shape_forge: &ShapeForge,
     ) {

crates/oxide_kernel/src/kernel.rs

@@ -80,11 +80,6 @@ impl KernelConfig {
     pub fn set_session_gc_threshold(&mut self, bytes: usize) {
         self.session_gc_threshold = bytes;
     }
-
-    pub fn with_session_gc_threshold(mut self, bytes: usize) -> Self {
-        self.session_gc_threshold = bytes;
-        self
-    }
 }
 
 impl Default for KernelConfig {

crates/oxide_kernel/src/string_forge.rs

@@ -14,8 +14,8 @@ pub fn hash16(s: &str) -> u16 {
 }
 
 pub struct StringEntry {
-    pub data: String,
-    pub ref_count: AtomicU32,
+    pub(crate) data: String,
+    pub(crate) ref_count: AtomicU32,
     pub hash: u16,
 }