按规划继续工作

结论：新增解释器初始化和同步的 WASM/浏览器验证，继续保持核心行为来自 vendored LinuxCNC。

wasm-port/tests/browser/interp_smoke.html

@@ -128,6 +128,34 @@
         },
       });
 
+      verifyExpectedOutput(
+        "probe_init_and_synch",
+        interp.probeInitAndSynch(),
+        [
+          "init=0",
+          "setup.length_units=2",
+          "setup.origin_index=1",
+          "setup.distance_mode=0",
+          "setup.feed_mode=0",
+          "setup.motion_mode=800",
+          "canon_event=INIT_CANON",
+          "canon_event=USE_LENGTH_UNITS units=2",
+          "canon_event=SET_G5X_OFFSET index=1",
+          "canon_event=SET_G92_OFFSET x=0 y=0 z=0",
+          "canon_event=SET_XY_ROTATION rotation=0",
+          "canon_event=SET_FEED_REFERENCE reference=2",
+          "inch_init=0",
+          "inch_setup.length_units=1",
+          "inch_external_length_units=0.0393701",
+          "inch_canon_event=USE_LENGTH_UNITS units=1",
+          "synch=0",
+          "synch.current_pocket=2",
+          "synch.selected_pocket=2",
+          "synch.tool_0=2",
+          "synch.tool_2=2",
+        ].join("\n"),
+      );
+
       for (const fixtureName of INTERP_BROWSER_MDI_FIXTURES) {
         const programText = await fetchText(`../fixtures/gcode/${fixtureName}.ngc`);
         const expectedText = await fetchText(`../fixtures/canon/${fixtureName}.events`);