docs: explain Tessera modules and execution flows in Chinese

src/runtime/vm_sequence.rs

@@ -1,9 +1,13 @@
+//! 构造共享 VM 调用序列与同帧循环驱动的字节码。
+//! 用托管函数串联步骤，避免为每个布局节点反复创建独立解释器调用；重复驱动会保留同一个执行帧和预算域。
+//!
 //! Validated call sequences share the current VM budget and explicit frames.
 use endor_core::{
     CodeLayout, EndorCode, EndorCodeObject, Instruction, NativeContext, ObjectRef, Opcode, Value,
     VmError,
 };
 
+/// 根据当前输入构造本模块的派生结果，具体的验证与资源边界见函数内步骤。
 pub fn build(
     cx: &mut NativeContext<'_>,
     calls: Vec<ObjectRef>,
@@ -36,6 +40,7 @@ pub fn build(
 
 /// A fixed-size driver. Each callback returns whether another occurrence is
 /// needed; delegated source calls and all iterations share this VM budget.
+/// 构造重复调用同一托管函数的驱动，保持共享参数与引用生命周期。
 pub fn repeat_call(
     cx: &mut NativeContext<'_>,
     callback: ObjectRef,
@@ -63,6 +68,7 @@ pub fn repeat_call(
 
 /// Prepare only the current occurrence, collect its result, then continue the
 /// outer driver. The helper frame and its managed captures die before the next.
+/// 将一步调用结果收集到驱动状态，再安排下一步调用。
 pub fn collect_and_continue(
     cx: &mut NativeContext<'_>,
     collector: ObjectRef,
@@ -94,6 +100,7 @@ pub fn collect_and_continue(
     driver(cx, instructions, constants, name, desktop)
 }
 
+/// 建立承载整个步骤序列的托管函数，使续体可以在同一个 VM 帧中恢复。
 fn driver(
     cx: &mut NativeContext<'_>,
     instructions: Vec<Instruction>,
@@ -112,6 +119,7 @@ fn driver(
 
 /// Consume the condition on the stack: true repeats this same frame from zero,
 /// false falls through. Operand widths include EXTENDED_ARG code units.
+/// 构造由继续条件决定是否再执行一轮的同帧循环。
 pub fn repeat_while(instructions: &mut Vec<Instruction>) -> Result<(), VmError> {
     let body = Instruction::encode_all(instructions)?.len() / 2;
     let mut back = Instruction::new(Opcode::JumpBackward, 0);