阶段 C 步骤 7：isa 拆出 Image，vm 依赖收窄。

- 删 isa/Image.h + Image.cpp（ImageView/FNV/写文件/sidecar 不再属于 isa）
- vm 自实现只读视图 vm/Image.h/cpp：头 104（12.13）/段校验/缺 SHA 尾报错
  （型号匹配与 SHA 校验留步骤 8）；Machine 改用 vm::Image + vm::ImageHeader
- executor：本地读文件（替换 isa::read_stb_file）
- 测试：isa_test 删映像/FNV 部分；codegen_test/vm_test 改用 compiler::StbView /
  vm::ConstEntry；vm_test 手拼映像适配新格式（头 104 + 尾 32 占位）
- 验证：line1 编译 288 字节 → BytecodeExecutor 回放 Q 正确；ctest 12/12

tests/src/vm_test.cpp

@@ -15,7 +15,6 @@
 #include "compiler/Project.h"
 #include "compiler/Typecheck.h"
 #include "isa/Encode.h"
-#include "isa/Image.h"
 #include "isa/Instr.h"
 #include "isa/Op.h"
 #include "vm/Machine.h"
@@ -93,7 +92,7 @@ struct HFunc {
     uint32_t nregs = 8;
 };
 
-static std::vector<uint8_t> hand_image(const std::vector<isa::ConstEntry>& consts,
+static std::vector<uint8_t> hand_image(const std::vector<vm::ConstEntry>& consts,
                                        const std::vector<HFunc>& funcs,
                                        uint32_t entry = 0,
                                        uint32_t cycle_limit = 100000,
@@ -102,11 +101,11 @@ static std::vector<uint8_t> hand_image(const std::vector<isa::ConstEntry>& const
     for (const HFunc& f : funcs) {
         code_total += f.code.size() * 4;
     }
-    const uint32_t off_const = 72;
+    const uint32_t off_const = 104;
     const uint32_t off_funcs = off_const + static_cast<uint32_t>(consts.size()) * 12;
     const uint32_t off_code = off_funcs + static_cast<uint32_t>(funcs.size()) * 12;
     const uint32_t off_data = off_code + static_cast<uint32_t>(code_total);
-    const uint32_t off_end = off_data + static_cast<uint32_t>(data.size());
+    const uint32_t off_end = off_data + static_cast<uint32_t>(data.size()) + 32;  // SHA 尾占位
 
     std::vector<uint8_t> b(off_end, 0);
     auto put32 = [&](size_t o, uint32_t v) {
@@ -120,8 +119,8 @@ static std::vector<uint8_t> hand_image(const std::vector<isa::ConstEntry>& const
             b[o + i] = static_cast<uint8_t>((v >> (8 * i)) & 0xFFu);
         }
     };
-    put32(0, isa::kMagic);
-    put32(4, isa::kVersion);
+    put32(0, 0x43545353u);
+    put32(4, 1u);
     put32(8, cycle_limit);
     put32(12, 10);  // dt_ms
     put32(24, entry);
@@ -163,10 +162,10 @@ static std::vector<uint8_t> hand_image(const std::vector<isa::ConstEntry>& const
 
 static bool test_hand_scalar() {
     // r8 := 5；r9 := r8 + 3；槽 0 ← r9；槽 1 → r10；JT 跳过一条
-    const std::vector<isa::ConstEntry> consts = {
-        {isa::types::Int, 5},
-        {isa::types::Int, 3},
-        {isa::types::Int, 1},
+    const std::vector<vm::ConstEntry> consts = {
+        {1, 5},
+        {1, 3},
+        {1, 1},
     };
     const std::vector<HFunc> funcs = {{
         {
@@ -201,9 +200,9 @@ static bool test_hand_scalar() {
 static bool test_hand_call() {
     // fn0（入口）：r8=5、r2=7、实参 r1←r8；CALL 1；结果 r0 → r8
     // fn1：r0 = r1 + r2（r1/r2 来自调用约定区复制）
-    const std::vector<isa::ConstEntry> consts = {
-        {isa::types::Int, 5},
-        {isa::types::Int, 7},
+    const std::vector<vm::ConstEntry> consts = {
+        {1, 5},
+        {1, 7},
     };
     const std::vector<HFunc> funcs = {
         {{