diff --git a/web/react/src/App.tsx b/web/react/src/App.tsx
index 18b33ce..21e4bda 100644
--- a/web/react/src/App.tsx
+++ b/web/react/src/App.tsx
@@ -116,7 +116,7 @@ function VirtualizedExecutionTrace({ entries, executing }: { entries: Array<{ li
   return <div ref={traceRef} className="program-trace-scroll" onScroll={(event) => { const node = event.currentTarget; followRef.current = node.scrollHeight - node.scrollTop - node.clientHeight < TRACE_ROW_HEIGHT * 1.5; updateWindow(); }}><ol style={{ height: `${Math.max(1, entries.length * TRACE_ROW_HEIGHT)}px` }}>{visible.map((entry, offset) => { const index = windowRange.start + offset; const isCurrent = executing && index === entries.length - 1; return <li key={`${entry.line}-${index}`} className={isCurrent ? "executing-line" : "completed-line"} style={{ position: "absolute", top: `${index * TRACE_ROW_HEIGHT}px`, left: 0, height: `${TRACE_ROW_HEIGHT}px` }} aria-current={isCurrent ? "true" : undefined}><span>L{entry.line}</span><code title={entry.text}>{entry.text || "-"}</code></li>; })}</ol></div>;
 }
 
-function ProgramPane({ text, setText, activeGcodes, executionTrace, programStatus, onLoad, onRun, onStep, onOpenFile, canLoad, canRun, canStep, currentLine, executionLine, executionLineText, diagnostic }: { text: string; setText: (text: string) => void; activeGcodes: string; executionTrace: Array<{ line: number; text: string; program_status?: string | null }>; programStatus: string; onLoad: () => void; onRun: () => void; onStep: () => void; onOpenFile: () => void; canLoad: boolean; canRun: boolean; canStep: boolean; currentLine: number | null; executionLine: number | null; executionLineText: string; diagnostic: string | null }) {
+function ProgramPane({ text, setText, activeGcodes, executionTrace, programStatus, onLoad, onRun, onStep, canLoad, canRun, canStep, currentLine, executionLine, executionLineText, diagnostic }: { text: string; setText: (text: string) => void; activeGcodes: string; executionTrace: Array<{ line: number; text: string; program_status?: string | null }>; programStatus: string; onLoad: () => void; onRun: () => void; onStep: () => void; canLoad: boolean; canRun: boolean; canStep: boolean; currentLine: number | null; executionLine: number | null; executionLineText: string; diagnostic: string | null }) {
   const lines = text.split("\n");
   const executing = ["running", "paused"].includes(programStatus.toLowerCase());
   const mainLine = executing && currentLine && currentLine > 0 && currentLine <= lines.length ? currentLine : null;
@@ -144,7 +144,7 @@ function ProgramPane({ text, setText, activeGcodes, executionTrace, programStatu
   }, [mainLine]);
   const visibleLines = lines.slice(editorWindow.start, editorWindow.end);
   const lineClass = (line: number) => line === mainLine ? "current-line" : executedLines.has(line) ? "completed-line" : "";
-  return <section className="axis-program-pane" data-axis-feature="AXIS-UI-07" aria-label="G-code program"><div className="program-main-layout"><div className="program-editor-wrap"><div ref={gutterRef} className="program-gutter" aria-label="G-code line numbers"><div className="program-gutter-content" style={{ height: `${Math.max(PROGRAM_ROW_HEIGHT, lines.length * PROGRAM_ROW_HEIGHT)}px` }}>{visibleLines.map((_, offset) => { const index = editorWindow.start + offset; const line = index + 1; return <span key={index} className={lineClass(line)} style={{ top: `${index * PROGRAM_ROW_HEIGHT}px` }} aria-current={line === mainLine ? "true" : undefined}>{line}</span>; })}</div></div><div className="program-editor-input"><div ref={highlightsRef} className="program-line-highlights" style={{ height: `${Math.max(PROGRAM_ROW_HEIGHT, lines.length * PROGRAM_ROW_HEIGHT)}px` }} aria-hidden="true"><span className="program-highlights-spacer" />{visibleLines.map((_, offset) => { const index = editorWindow.start + offset; return <span key={index} className={lineClass(index + 1)} style={{ top: `${index * PROGRAM_ROW_HEIGHT}px` }} />; })}</div><textarea ref={editorRef} id="axis-program" data-axis-feature="AXIS-EDIT-01" value={text} onChange={(event) => setText(event.target.value)} onScroll={() => { if (editorRef.current) { if (gutterRef.current) gutterRef.current.scrollTop = editorRef.current.scrollTop; if (highlightsRef.current) { highlightsRef.current.scrollTop = editorRef.current.scrollTop; highlightsRef.current.scrollLeft = editorRef.current.scrollLeft; } updateEditorWindow(); } }} spellCheck={false} aria-invalid={Boolean(diagnostic)} aria-label="G-code program" /></div></div><div className="program-execution-panel"><div className="program-execution-line" role="status" aria-label="Currently executing G-code"><span>{executionLine ? `Executing source line ${executionLine}` : "Execution idle"}</span><code title={executionLineText}>{executionLineText || "-"}</code></div><div className="program-execution-trace" role="log" aria-label="G-code execution trace" aria-live="polite"><strong>Subprogram / execution trace <span>({executionTrace.length} cached)</span></strong><VirtualizedExecutionTrace entries={executionTrace} executing={executing} /></div></div></div><aside className="program-side"><div className="program-actions"><TextButton feature="AXIS-EDIT-01" onClick={onOpenFile}>Open file</TextButton><TextButton feature="AXIS-EDIT-01" onClick={onLoad} disabled={!canLoad}>Load</TextButton><TextButton feature="AXIS-CTRL-02" onClick={onRun} disabled={!canRun}>Run</TextButton><TextButton feature="AXIS-CTRL-02" onClick={onStep} disabled={!canStep}>Step</TextButton></div><label className="active-gcodes-label">Active G-Codes:<textarea data-axis-feature="AXIS-UI-07" readOnly value={activeGcodes} aria-label="Active G-Codes" /></label>{diagnostic && <output className="program-diagnostic" role="alert" data-axis-feature="AXIS-EDIT-01">{diagnostic}</output>}</aside></section>;
+  return <section className="axis-program-pane" data-axis-feature="AXIS-UI-07" aria-label="G-code program"><div className="program-main-layout"><div className="program-editor-wrap"><div ref={gutterRef} className="program-gutter" aria-label="G-code line numbers"><div className="program-gutter-content" style={{ height: `${Math.max(PROGRAM_ROW_HEIGHT, lines.length * PROGRAM_ROW_HEIGHT)}px` }}>{visibleLines.map((_, offset) => { const index = editorWindow.start + offset; const line = index + 1; return <span key={index} className={lineClass(line)} style={{ top: `${index * PROGRAM_ROW_HEIGHT}px` }} aria-current={line === mainLine ? "true" : undefined}>{line}</span>; })}</div></div><div className="program-editor-input"><div ref={highlightsRef} className="program-line-highlights" style={{ height: `${Math.max(PROGRAM_ROW_HEIGHT, lines.length * PROGRAM_ROW_HEIGHT)}px` }} aria-hidden="true"><span className="program-highlights-spacer" />{visibleLines.map((_, offset) => { const index = editorWindow.start + offset; return <span key={index} className={lineClass(index + 1)} style={{ top: `${index * PROGRAM_ROW_HEIGHT}px` }} />; })}</div><textarea ref={editorRef} id="axis-program" data-axis-feature="AXIS-EDIT-01" value={text} onChange={(event) => setText(event.target.value)} onScroll={() => { if (editorRef.current) { if (gutterRef.current) gutterRef.current.scrollTop = editorRef.current.scrollTop; if (highlightsRef.current) { highlightsRef.current.scrollTop = editorRef.current.scrollTop; highlightsRef.current.scrollLeft = editorRef.current.scrollLeft; } updateEditorWindow(); } }} spellCheck={false} aria-invalid={Boolean(diagnostic)} aria-label="G-code program" /></div></div><div className="program-execution-panel"><div className="program-execution-line" role="status" aria-label="Currently executing G-code"><span>{executionLine ? `Executing source line ${executionLine}` : "Execution idle"}</span><code title={executionLineText}>{executionLineText || "-"}</code></div><div className="program-execution-trace" role="log" aria-label="G-code execution trace" aria-live="polite"><strong>Subprogram / execution trace <span>({executionTrace.length} cached)</span></strong><VirtualizedExecutionTrace entries={executionTrace} executing={executing} /></div></div></div><aside className="program-side"><div className="program-actions"><TextButton feature="AXIS-EDIT-01" onClick={onLoad} disabled={!canLoad}>Load</TextButton><TextButton feature="AXIS-CTRL-02" onClick={onRun} disabled={!canRun}>Run</TextButton><TextButton feature="AXIS-CTRL-02" onClick={onStep} disabled={!canStep}>Step</TextButton></div><label className="active-gcodes-label">Active G-Codes:<textarea data-axis-feature="AXIS-UI-07" readOnly value={activeGcodes} aria-label="Active G-Codes" /></label>{diagnostic && <output className="program-diagnostic" role="alert" data-axis-feature="AXIS-EDIT-01">{diagnostic}</output>}</aside></section>;
 }
 
 function DiagnosticsPanel({ state, gates }: { state: typeof INITIAL_STATE; gates: Record<string, { enabled: boolean; reason: string }> }) {
@@ -304,7 +304,33 @@ export function App() {
       .finally(() => setProgramLoading(false));
   };
   const openProgramFile = () => programFileInput.current?.click();
-  const onProgramFile = async (event: React.ChangeEvent<HTMLInputElement>) => { const file = event.target.files?.[0]; event.target.value = ""; if (!file) return; const source = normalizeProgramSource(await file.text()); const path = file.name === "3D_Chips.ngc" ? "linuxcnc/nc_files/3D_Chips.ngc" : `browser/${file.name}`; setProgramText(source); setProgramPath(path); setPlotCleared(false); setCommandStatus(`${file.name} loaded in editor; press Load to send it to LinuxCNC`); };
+  const onProgramFile = async (event: React.ChangeEvent<HTMLInputElement>) => {
+    const file = event.target.files?.[0];
+    event.target.value = "";
+    if (!file || programLoading || programRunning) return;
+    try {
+      const source = normalizeProgramSource(await file.text());
+      if (!source.trim()) throw new Error("program_file_empty");
+      const path = file.name === "3D_Chips.ngc" ? "linuxcnc/nc_files/3D_Chips.ngc" : `browser/${file.name}`;
+      setProgramText(source);
+      setProgramPath(path);
+      setProgramLoading(true);
+      setPlotCleared(false);
+      setCommandStatus("PROGRAM_LOAD pending: waiting for LinuxCNC WASM preview");
+      setCaseStatus(`${file.name} loading through linuxcnc-wasm...`);
+      await clearLoadedPreview();
+      await operationController.execute("PROGRAM_LOAD", { source, path }, { state: axisState, gate: false });
+      setOperationTrace(operationController.exportTrace());
+      setCommandStatus("PROGRAM_LOAD acknowledged");
+      setCaseStatus(`${path} loaded through linuxcnc-wasm`);
+    } catch (error) {
+      setOperationTrace(operationController.exportTrace());
+      setCommandStatus(`PROGRAM_LOAD blocked: ${error instanceof Error ? error.message : "program_file_load_failed"}`);
+      setCaseStatus(`blocked: ${error instanceof Error ? error.message : "program_file_load_failed"}`);
+    } finally {
+      setProgramLoading(false);
+    }
+  };
   const enterManualMode = () => { setLeftTab("manual"); if (String(axisState.task.mode).toUpperCase() !== "MANUAL") void dispatch("SET_MODE", { mode: "MANUAL" }, false).catch(() => undefined); };
   useEffect(() => {
     const onKeyDown = (event: KeyboardEvent) => {
@@ -335,25 +361,30 @@ export function App() {
   const coolant = { mist: Boolean((state.deviceIo as Record<string, any> | null)?.coolant?.mist_requested), flood: Boolean((state.deviceIo as Record<string, any> | null)?.coolant?.flood_requested) };
   const onSpindle = (direction: number) => { execute("SPINDLE_COMMAND", { spindle: 0, direction, rpm: direction === 0 ? 0 : 600, enabled: direction !== 0 }); };
   const onCoolant = (key: "mist" | "flood") => { const next = { ...coolant, [key]: !coolant[key] }; execute("COOLANT_COMMAND", { mist: next.mist, flood: next.flood, lube: false }); };
-  const activeGcodes = state.program?.active_gcodes ? String(state.program.active_gcodes) : "G21 G90\nG17 G40 G49\nG54 G64\nM5 M9";
+  const activeGcodes = programLoading ? "" : state.program?.active_gcodes ? String(state.program.active_gcodes) : "G21 G90\nG17 G40 G49\nG54 G64\nM5 M9";
   const toolNumber = String((state.devices as Record<string, any> | null)?.tool?.current ?? state.snapshot?.tool?.current ?? 0);
   const currentLine = Number(state.program?.line ?? state.task?.current_line ?? 0) || null;
   const executionLine = Number(state.program?.execution_line ?? currentLine ?? 0) || null;
   const executionLineText = String(state.program?.execution_line_text ?? "");
+  const visibleExecutionTrace = programLoading ? [] : state.executionTrace;
+  const visibleCurrentLine = programLoading ? null : currentLine;
+  const visibleExecutionLine = programLoading ? null : executionLine;
+  const visibleExecutionLineText = programLoading ? "" : executionLineText;
+  const visibleProgramStatus = programLoading ? "loading" : String(state.program?.program_status ?? "idle");
   const homedAxes = Array.isArray(state.snapshot?.motion?.homed_axes) ? state.snapshot.motion.homed_axes : [];
   const allHomed = homedAxes.length >= 5 && homedAxes.slice(0, 5).every(Boolean);
   const xyzacCommand = (kind: string, payload: Record<string, unknown> = {}, action?: string) => { void dispatch(kind, payload, true, action ?? null).then(() => { if (kind === "VISUAL_CLEAR") setPlotCleared(true); }).catch(() => undefined); };
   const position = `X${Number(xyzacView.pose?.x ?? axes[0] ?? 0).toFixed(3)} Y${Number(xyzacView.pose?.y ?? axes[1] ?? 0).toFixed(3)} Z${Number(xyzacView.pose?.z ?? axes[2] ?? 0).toFixed(3)} A${Number(xyzacView.pose?.a ?? 0).toFixed(3)} C${Number(xyzacView.pose?.c ?? 0).toFixed(3)}`;
   return <main className="axis-app" data-axis-feature="AXIS-UI-01" data-axis-run-enabled={String(gates.run.enabled)} data-axis-homed={JSON.stringify(state.snapshot?.motion?.homed_axes ?? state.snapshot?.motion?.homed ?? null)} data-axis-program-status={String(state.program?.program_status ?? "idle")}>
     <header className="axis-window-header" data-axis-feature="AXIS-SHELL-01"><div className="axis-brand"><img src={axisIcon("axis-24x24.png")} alt="AXIS" /> <strong>AXIS</strong><span>LinuxCNC Web/WASM</span></div><span className={`connection-state ${state.status}`} data-axis-feature="AXIS-SHELL-01" role="status">{state.status.toUpperCase()}</span><span className="axis-state-badge" data-axis-state={taskState} aria-label={`Machine ${machineState}, operation ${operationState}`}>{taskState}</span></header>
-    <nav className="axis-menubar" data-axis-feature="AXIS-UI-02" aria-label="AXIS menu"><Menu label="File"><MenuAction onClick={openProgramFile} disabled={programRunning || programLoading}>Open G-code...</MenuAction><MenuAction onClick={() => { setProgramText(DEFAULT_PROGRAM); setProgramPath(PROGRAM_PATH); }} disabled={programRunning || programLoading}>Reload editor</MenuAction><MenuAction onClick={() => setCommandStatus("Tool data editor is browser-backed")}>Edit tool data...</MenuAction><MenuAction onClick={() => setCommandStatus("Quit is unavailable in a browser tab")}>Quit</MenuAction></Menu><Menu label="Machine"><MenuAction shortcut="F1" onClick={toggleEstop}>{isEstop ? "Cancel Emergency Stop" : "Emergency Stop"}</MenuAction><MenuAction shortcut="F2" onClick={powerOn} disabled={!gates.power.enabled}>{machineOn ? "Power off" : "Power on"}</MenuAction><MenuAction onClick={resetMachine} disabled={!gates.reset.enabled}>Reset machine</MenuAction><MenuAction shortcut="R" onClick={runProgram} disabled={!gates.run.enabled || programLoading}>Run program</MenuAction><MenuAction shortcut="T" onClick={() => execute("PROGRAM_STEP")} disabled={!gates.step.enabled || programLoading}>Step</MenuAction><MenuAction shortcut="P" onClick={() => execute("PROGRAM_PAUSE")} disabled={!gates.pause.enabled || programLoading}>Pause</MenuAction><MenuAction shortcut="S" onClick={() => execute("PROGRAM_RESUME")} disabled={!gates.resume.enabled || programLoading}>Resume</MenuAction><MenuAction shortcut="Esc" onClick={stopProgram} disabled={!gates.abort.enabled}>Stop</MenuAction></Menu><Menu label="View"><MenuAction onClick={() => setRightTab("preview")}>Preview</MenuAction><MenuAction onClick={() => setRightTab("dro")}>DRO</MenuAction><MenuAction onClick={enterManualMode} disabled={programRunning || programLoading}>Manual Control</MenuAction><MenuAction onClick={() => setLeftTab("mdi")} disabled={programRunning || programLoading}>MDI</MenuAction></Menu><Menu label="Help"><MenuAction onClick={() => setCommandStatus("LinuxCNC AXIS source-compatible controls")}>About AXIS</MenuAction></Menu></nav>
-    <section className="axis-toolbar" data-axis-feature="AXIS-UI-05" aria-label="AXIS toolbar"><IconButton feature="AXIS-MACHINE-01" label={isEstop ? "Cancel Emergency Stop [F1]" : "Emergency Stop [F1]"} asset="tool_estop.gif" danger onClick={toggleEstop} pressed={isEstop} /><IconButton feature="AXIS-MACHINE-02" label={machineOn ? "Power off [F2]" : "Power on [F2]"} asset="tool_power.gif" disabled={!gates.power.enabled} onClick={powerOn} /><IconButton feature="AXIS-MACHINE-03" label="Reset machine" asset="tool_reload.gif" disabled={!gates.reset.enabled} onClick={resetMachine} /><Separator /><IconButton feature="AXIS-FILE-01" label="Open G-Code file [O]" asset="tool_open.gif" onClick={openProgramFile} /><IconButton feature="AXIS-FILE-02" label="Load exact XYZAC TRT case" asset="tool_verify.gif" disabled={!gates.load.enabled} onClick={loadCase} /><IconButton feature="AXIS-FILE-04" label="Reopen editor defaults" asset="tool_reload.gif" onClick={() => { setProgramText(DEFAULT_PROGRAM); setProgramPath(PROGRAM_PATH); setPlotCleared(false); }} /><Separator /><IconButton feature="AXIS-MACHINE-03" label="Begin executing current file [R]" asset="tool_run.gif" disabled={!gates.run.enabled} onClick={runProgram} /><IconButton feature="AXIS-MACHINE-05" label="Execute next line [T]" asset="tool_step.gif" disabled={!gates.step.enabled} onClick={() => execute("PROGRAM_STEP")} /><IconButton feature="AXIS-MACHINE-06" label={programPaused ? "Resume execution [S]" : "Pause execution [P]"} asset={programPaused ? "resume_inhibit.gif" : "tool_pause.gif"} disabled={programPaused ? !gates.resume.enabled : !gates.pause.enabled} onClick={() => execute(programPaused ? "PROGRAM_RESUME" : "PROGRAM_PAUSE")} /><IconButton feature="AXIS-MACHINE-07" label="Stop program execution [ESC]" asset="tool_stop.gif" disabled={!gates.abort.enabled} onClick={stopProgram} /><Separator /><IconButton feature="AXIS-MACHINE-09" label="Toggle skip lines with slash" asset="tool_blockdelete.gif" pressed={blockDelete} onClick={() => setBlockDelete((value) => !value)} /><IconButton feature="AXIS-MACHINE-08" label="Toggle optional pause" asset="tool_optpause.gif" pressed={optionalStop} onClick={() => setOptionalStop((value) => !value)} /><Separator /><IconButton feature="AXIS-VIEW-01" label="Zoom in" asset="tool_zoomin.gif" onClick={() => setZoom((value) => Math.min(2, value + .2))} /><IconButton feature="AXIS-VIEW-01" label="Zoom out" asset="tool_zoomout.gif" onClick={() => setZoom((value) => Math.max(.5, value - .2))} /><IconButton feature="AXIS-VIEW-01" label="Top view" asset="tool_axis_z.gif" pressed={view === "z"} onClick={() => { setView("z"); setRightTab("preview"); }} /><IconButton feature="AXIS-VIEW-01" label="Rotated top view" asset="tool_axis_z2.gif" pressed={view === "z2"} onClick={() => { setView("z2"); setRightTab("preview"); }} /><IconButton feature="AXIS-VIEW-01" label="Side view" asset="tool_axis_x.gif" pressed={view === "x"} onClick={() => { setView("x"); setRightTab("preview"); }} /><IconButton feature="AXIS-VIEW-01" label="Front view" asset="tool_axis_y.gif" pressed={view === "y"} onClick={() => { setView("y"); setRightTab("preview"); }} /><IconButton feature="AXIS-VIEW-01" label="Inverted front view" asset="tool_axis_y2.png" pressed={view === "y2"} onClick={() => { setView("y2"); setRightTab("preview"); }} /><IconButton feature="AXIS-VIEW-01" label="Perspective view" asset="tool_axis_p.gif" pressed={view === "p"} onClick={() => { setView("p"); setRightTab("preview"); }} /><IconButton feature="AXIS-VIEW-02" label="Drag / rotate mode" asset="tool_rotate.gif" pressed={rotateMode} onClick={() => setRotateMode((value) => !value)} /><Separator /><IconButton feature="AXIS-VIEW-15" label="Clear live plot [Ctrl-K]" asset="tool_clear.gif" onClick={() => xyzacCommand("VISUAL_CLEAR", {}, "vismachClear")} /></section>
+    <nav className="axis-menubar" data-axis-feature="AXIS-UI-02" aria-label="AXIS menu"><Menu label="File"><MenuAction onClick={() => { setProgramText(DEFAULT_PROGRAM); setProgramPath(PROGRAM_PATH); }} disabled={programRunning || programLoading}>Reload editor</MenuAction><MenuAction onClick={() => setCommandStatus("Tool data editor is browser-backed")}>Edit tool data...</MenuAction><MenuAction onClick={() => setCommandStatus("Quit is unavailable in a browser tab")}>Quit</MenuAction></Menu><Menu label="Machine"><MenuAction shortcut="F1" onClick={toggleEstop}>{isEstop ? "Cancel Emergency Stop" : "Emergency Stop"}</MenuAction><MenuAction shortcut="F2" onClick={powerOn} disabled={!gates.power.enabled}>{machineOn ? "Power off" : "Power on"}</MenuAction><MenuAction onClick={resetMachine} disabled={!gates.reset.enabled}>Reset machine</MenuAction><MenuAction shortcut="R" onClick={runProgram} disabled={!gates.run.enabled || programLoading}>Run program</MenuAction><MenuAction shortcut="T" onClick={() => execute("PROGRAM_STEP")} disabled={!gates.step.enabled || programLoading}>Step</MenuAction><MenuAction shortcut="P" onClick={() => execute("PROGRAM_PAUSE")} disabled={!gates.pause.enabled || programLoading}>Pause</MenuAction><MenuAction shortcut="S" onClick={() => execute("PROGRAM_RESUME")} disabled={!gates.resume.enabled || programLoading}>Resume</MenuAction><MenuAction shortcut="Esc" onClick={stopProgram} disabled={!gates.abort.enabled}>Stop</MenuAction></Menu><Menu label="View"><MenuAction onClick={() => setRightTab("preview")}>Preview</MenuAction><MenuAction onClick={() => setRightTab("dro")}>DRO</MenuAction><MenuAction onClick={enterManualMode} disabled={programRunning || programLoading}>Manual Control</MenuAction><MenuAction onClick={() => setLeftTab("mdi")} disabled={programRunning || programLoading}>MDI</MenuAction></Menu><Menu label="Help"><MenuAction onClick={() => setCommandStatus("LinuxCNC AXIS source-compatible controls")}>About AXIS</MenuAction></Menu></nav>
+    <section className="axis-toolbar" data-axis-feature="AXIS-UI-05" aria-label="AXIS toolbar"><IconButton feature="AXIS-MACHINE-01" label={isEstop ? "Cancel Emergency Stop [F1]" : "Emergency Stop [F1]"} asset="tool_estop.gif" danger onClick={toggleEstop} pressed={isEstop} /><IconButton feature="AXIS-MACHINE-02" label={machineOn ? "Power off [F2]" : "Power on [F2]"} asset="tool_power.gif" disabled={!gates.power.enabled} onClick={powerOn} /><IconButton feature="AXIS-MACHINE-03" label="Reset machine" asset="tool_reload.gif" disabled={!gates.reset.enabled} onClick={resetMachine} /><Separator /><IconButton feature="AXIS-FILE-01" label="Open G-Code file [O]" asset="tool_open.gif" disabled={programRunning || programLoading} onClick={openProgramFile} /><IconButton feature="AXIS-FILE-02" label="Load exact XYZAC TRT case" asset="tool_verify.gif" disabled={!gates.load.enabled} onClick={loadCase} /><IconButton feature="AXIS-FILE-04" label="Reopen editor defaults" asset="tool_reload.gif" onClick={() => { setProgramText(DEFAULT_PROGRAM); setProgramPath(PROGRAM_PATH); setPlotCleared(false); }} /><Separator /><IconButton feature="AXIS-MACHINE-03" label="Begin executing current file [R]" asset="tool_run.gif" disabled={!gates.run.enabled} onClick={runProgram} /><IconButton feature="AXIS-MACHINE-05" label="Execute next line [T]" asset="tool_step.gif" disabled={!gates.step.enabled} onClick={() => execute("PROGRAM_STEP")} /><IconButton feature="AXIS-MACHINE-06" label={programPaused ? "Resume execution [S]" : "Pause execution [P]"} asset={programPaused ? "resume_inhibit.gif" : "tool_pause.gif"} disabled={programPaused ? !gates.resume.enabled : !gates.pause.enabled} onClick={() => execute(programPaused ? "PROGRAM_RESUME" : "PROGRAM_PAUSE")} /><IconButton feature="AXIS-MACHINE-07" label="Stop program execution [ESC]" asset="tool_stop.gif" disabled={!gates.abort.enabled} onClick={stopProgram} /><Separator /><IconButton feature="AXIS-MACHINE-09" label="Toggle skip lines with slash" asset="tool_blockdelete.gif" pressed={blockDelete} onClick={() => setBlockDelete((value) => !value)} /><IconButton feature="AXIS-MACHINE-08" label="Toggle optional pause" asset="tool_optpause.gif" pressed={optionalStop} onClick={() => setOptionalStop((value) => !value)} /><Separator /><IconButton feature="AXIS-VIEW-01" label="Zoom in" asset="tool_zoomin.gif" onClick={() => setZoom((value) => Math.min(2, value + .2))} /><IconButton feature="AXIS-VIEW-01" label="Zoom out" asset="tool_zoomout.gif" onClick={() => setZoom((value) => Math.max(.5, value - .2))} /><IconButton feature="AXIS-VIEW-01" label="Top view" asset="tool_axis_z.gif" pressed={view === "z"} onClick={() => { setView("z"); setRightTab("preview"); }} /><IconButton feature="AXIS-VIEW-01" label="Rotated top view" asset="tool_axis_z2.gif" pressed={view === "z2"} onClick={() => { setView("z2"); setRightTab("preview"); }} /><IconButton feature="AXIS-VIEW-01" label="Side view" asset="tool_axis_x.gif" pressed={view === "x"} onClick={() => { setView("x"); setRightTab("preview"); }} /><IconButton feature="AXIS-VIEW-01" label="Front view" asset="tool_axis_y.gif" pressed={view === "y"} onClick={() => { setView("y"); setRightTab("preview"); }} /><IconButton feature="AXIS-VIEW-01" label="Inverted front view" asset="tool_axis_y2.png" pressed={view === "y2"} onClick={() => { setView("y2"); setRightTab("preview"); }} /><IconButton feature="AXIS-VIEW-01" label="Perspective view" asset="tool_axis_p.gif" pressed={view === "p"} onClick={() => { setView("p"); setRightTab("preview"); }} /><IconButton feature="AXIS-VIEW-02" label="Drag / rotate mode" asset="tool_rotate.gif" pressed={rotateMode} onClick={() => setRotateMode((value) => !value)} /><Separator /><IconButton feature="AXIS-VIEW-15" label="Clear live plot [Ctrl-K]" asset="tool_clear.gif" onClick={() => xyzacCommand("VISUAL_CLEAR", {}, "vismachClear")} /></section>
     <section className="axis-case-strip" data-axis-feature="AXIS-EDIT-03"><label>Simulation case<select data-axis-feature="AXIS-EDIT-03" value={casePath} onChange={(event) => setCasePath(event.target.value)}>{SIM_CASE_CATALOG.filter((entry) => entry.path === SELECTED_XYZAC_CASE).map((entry) => <option key={entry.path} value={entry.path}>{entry.label} | XYZAC TRT</option>)}</select></label><TextButton feature="AXIS-EDIT-03" onClick={loadCase} disabled={!gates.load.enabled || programLoading}>Load case</TextButton><TextButton feature="AXIS-EDIT-03" onClick={loadPackagedProgram} disabled={!gates.load.enabled || programLoading}>Load 3D_Chips.ngc</TextButton><span className={`case-status${programLoading ? " loading" : ""}`} role="status" aria-live="polite" aria-busy={programLoading}>{programLoading ? "PROGRAM_LOAD pending: LinuxCNC WASM preview in progress..." : caseStatus}</span><span className="command-status" role="status">{commandStatus}</span></section>
     <MachineSequence isEstop={isEstop} machineOn={machineOn} allHomed={allHomed} programLoaded={programLoaded} programRunning={programRunning} programLoading={programLoading} canPower={gates.power.enabled} canHome={gates.home.enabled} canRun={gates.run.enabled} onEstop={emergencyStop} onRelease={() => { void releaseEstop().catch(() => undefined); }} onPower={powerOn} onHomeAll={homeAll} onRun={runProgram} onSequence={runStartupSequence} />
     <XyzacTrtPanel view={xyzacView} command={xyzacCommand} />
-    <section className="axis-top-pane" data-axis-feature="AXIS-UI-06"><div className="axis-notebook left-notebook" data-axis-feature="AXIS-UI-06"><div className="notebook-tabs" role="tablist" aria-label="Manual, MDI and diagnostics controls"><button id="axis-tab-manual" type="button" role="tab" aria-controls="axis-panel-manual" aria-selected={leftTab === "manual"} className={leftTab === "manual" ? "active" : ""} onClick={enterManualMode}>Manual Control [F3]</button><button id="axis-tab-mdi" type="button" role="tab" aria-controls="axis-panel-mdi" aria-selected={leftTab === "mdi"} className={leftTab === "mdi" ? "active" : ""} onClick={() => setLeftTab("mdi")}>MDI [F5]</button><button id="axis-tab-diagnostics" type="button" role="tab" aria-controls="axis-panel-diagnostics" aria-selected={leftTab === "diagnostics"} className={leftTab === "diagnostics" ? "active" : ""} onClick={() => setLeftTab("diagnostics")}>Diagnostics</button></div><div id="axis-panel-manual" role="tabpanel" aria-labelledby="axis-tab-manual" hidden={leftTab !== "manual"}><ManualControl action={execute} ready={gates.jog.enabled} canHome={gates.home.enabled} onHomeAll={homeAll} selectedAxis={selectedAxis} setSelectedAxis={setSelectedAxis} spindleOn={spindleOn} coolant={coolant} onSpindle={onSpindle} onCoolant={onCoolant} devices={state.devices ?? {}} /></div><div id="axis-panel-mdi" role="tabpanel" aria-labelledby="axis-tab-mdi" hidden={leftTab !== "mdi"}><MdiControl action={execute} ready={gates.mdi.enabled} /></div><div id="axis-panel-diagnostics" role="tabpanel" aria-labelledby="axis-tab-diagnostics" hidden={leftTab !== "diagnostics"}><DiagnosticsPanel state={state} gates={gates} /><XyzacDiagnostics view={xyzacView} operations={operationTrace} alarms={state.alarms} error={state.error} /></div></div><div className="axis-notebook right-notebook" data-axis-feature="AXIS-UI-06"><div className="notebook-tabs" role="tablist" aria-label="Preview and DRO"><button id="axis-tab-preview" type="button" role="tab" aria-controls="axis-panel-preview" aria-selected={rightTab === "preview"} className={rightTab === "preview" ? "active" : ""} onClick={() => setRightTab("preview")}>Preview</button><button id="axis-tab-dro" type="button" role="tab" aria-controls="axis-panel-dro" aria-selected={rightTab === "dro"} className={rightTab === "dro" ? "active" : ""} onClick={() => setRightTab("dro")}>DRO</button></div><div id="axis-panel-preview" role="tabpanel" aria-labelledby="axis-tab-preview" className="axis-preview" hidden={rightTab !== "preview"}><XyzacToolPreviewFromSnapshot snapshot={state.snapshot} view={view} zoom={zoom} rotateMode={rotateMode} showPath={layers.path} showLive={layers.live} showLimits={layers.limits} showVelocity={layers.velocity} showOffsets={layers.offsets} showExtents={layers.extents} /></div><div id="axis-panel-dro" role="tabpanel" aria-labelledby="axis-tab-dro" hidden={rightTab !== "dro"}><DroView axes={axes} state={state} coordType={coordType} displayType={displayType} metric={metric} setCoordType={setCoordType} setDisplayType={setDisplayType} setMetric={setMetric} /></div></div></section>
+    <section className="axis-top-pane" data-axis-feature="AXIS-UI-06"><div className="axis-notebook left-notebook" data-axis-feature="AXIS-UI-06"><div className="notebook-tabs" role="tablist" aria-label="Manual, MDI and diagnostics controls"><button id="axis-tab-manual" type="button" role="tab" aria-controls="axis-panel-manual" aria-selected={leftTab === "manual"} className={leftTab === "manual" ? "active" : ""} onClick={enterManualMode}>Manual Control [F3]</button><button id="axis-tab-mdi" type="button" role="tab" aria-controls="axis-panel-mdi" aria-selected={leftTab === "mdi"} className={leftTab === "mdi" ? "active" : ""} onClick={() => setLeftTab("mdi")}>MDI [F5]</button><button id="axis-tab-diagnostics" type="button" role="tab" aria-controls="axis-panel-diagnostics" aria-selected={leftTab === "diagnostics"} className={leftTab === "diagnostics" ? "active" : ""} onClick={() => setLeftTab("diagnostics")}>Diagnostics</button></div><div id="axis-panel-manual" role="tabpanel" aria-labelledby="axis-tab-manual" hidden={leftTab !== "manual"}><ManualControl action={execute} ready={gates.jog.enabled} canHome={gates.home.enabled} onHomeAll={homeAll} selectedAxis={selectedAxis} setSelectedAxis={setSelectedAxis} spindleOn={spindleOn} coolant={coolant} onSpindle={onSpindle} onCoolant={onCoolant} devices={state.devices ?? {}} /></div><div id="axis-panel-mdi" role="tabpanel" aria-labelledby="axis-tab-mdi" hidden={leftTab !== "mdi"}><MdiControl action={execute} ready={gates.mdi.enabled} /></div><div id="axis-panel-diagnostics" role="tabpanel" aria-labelledby="axis-tab-diagnostics" hidden={leftTab !== "diagnostics"}><DiagnosticsPanel state={state} gates={gates} /><XyzacDiagnostics view={xyzacView} operations={operationTrace} alarms={state.alarms} error={state.error} /></div></div><div className="axis-notebook right-notebook" data-axis-feature="AXIS-UI-06"><div className="notebook-tabs" role="tablist" aria-label="Preview and DRO"><button id="axis-tab-preview" type="button" role="tab" aria-controls="axis-panel-preview" aria-selected={rightTab === "preview"} className={rightTab === "preview" ? "active" : ""} onClick={() => setRightTab("preview")}>Preview</button><button id="axis-tab-dro" type="button" role="tab" aria-controls="axis-panel-dro" aria-selected={rightTab === "dro"} className={rightTab === "dro" ? "active" : ""} onClick={() => setRightTab("dro")}>DRO</button></div><div id="axis-panel-preview" role="tabpanel" aria-labelledby="axis-tab-preview" className="axis-preview" hidden={rightTab !== "preview"}><XyzacToolPreviewFromSnapshot snapshot={programLoading ? null : state.snapshot} view={view} zoom={zoom} rotateMode={rotateMode} showPath={layers.path} showLive={layers.live} showLimits={layers.limits} showVelocity={layers.velocity} showOffsets={layers.offsets} showExtents={layers.extents} /></div><div id="axis-panel-dro" role="tabpanel" aria-labelledby="axis-tab-dro" hidden={rightTab !== "dro"}><DroView axes={axes} state={state} coordType={coordType} displayType={displayType} metric={metric} setCoordType={setCoordType} setDisplayType={setDisplayType} setMetric={setMetric} /></div></div></section>
     <section className="axis-metrics" data-axis-feature="AXIS-VIEW-03"><div className="axis-slider"><label>Jog Speed:<output>50%</output><input type="range" min="6" max="100" defaultValue="50" /></label><label>Feed Override:<output>{Math.round((state.snapshot?.overrides?.feed ?? 1) * 100)}%</output><input type="range" min="0" max="120" defaultValue="100" onChange={(event) => execute("SET_OVERRIDE", { feed: Number(event.target.value) / 100 })} /></label><label>Spindle Override:<output>{Math.round((state.snapshot?.overrides?.spindle?.[0] ?? 1) * 100)}%</output><input type="range" min="0" max="120" defaultValue="100" /></label></div><div className="axis-layer-controls" aria-label="Preview layers">{(["path", "live", "limits", "velocity", "offsets", "extents"] as const).map((layer) => <label key={layer}><input type="checkbox" data-axis-feature="AXIS-VIEW-03" checked={layers[layer]} onChange={(event) => setLayers((current) => ({ ...current, [layer]: event.target.checked }))} /> {layer}</label>)}</div></section>
-    <XyzacProgramPane status={String(state.program?.program_status ?? "idle")} currentLine={executionLine} sourceHash={String(state.program?.source_hash ?? "")}><ProgramPane text={programText} setText={setProgramText} activeGcodes={activeGcodes} executionTrace={state.executionTrace} programStatus={String(state.program?.program_status ?? "idle")} onOpenFile={openProgramFile} onLoad={loadProgram} onRun={runProgram} onStep={() => execute("PROGRAM_STEP")} canLoad={gates.load.enabled && !programLoading} canRun={gates.run.enabled && !programLoading} canStep={gates.step.enabled && !programLoading} currentLine={currentLine} executionLine={executionLine} executionLineText={executionLineText} diagnostic={state.error?.code ?? null} /></XyzacProgramPane>
+    <XyzacProgramPane status={visibleProgramStatus} currentLine={visibleCurrentLine} sourceHash={programLoading ? "" : String(state.program?.source_hash ?? "")}><ProgramPane text={programText} setText={setProgramText} activeGcodes={activeGcodes} executionTrace={visibleExecutionTrace} programStatus={visibleProgramStatus} onLoad={loadProgram} onRun={runProgram} onStep={() => execute("PROGRAM_STEP")} canLoad={gates.load.enabled && !programLoading} canRun={gates.run.enabled && !programLoading} canStep={gates.step.enabled && !programLoading} currentLine={visibleCurrentLine} executionLine={visibleExecutionLine} executionLineText={visibleExecutionLineText} diagnostic={state.error?.code ?? null} /></XyzacProgramPane>
     <input ref={programFileInput} className="visually-hidden-file-input" type="file" accept=".ngc,.nc,.gcode,.tap,text/plain" onChange={onProgramFile} aria-label="Open G-code file" />
     <footer className="axis-info-bar" data-axis-feature="AXIS-UI-07"><span className={`task-state ${state.status}`} data-axis-feature="AXIS-SHELL-01">{taskState}</span><span className="machine-state" data-axis-state-machine={machineState}>Machine {machineState}</span><span className="operation-state" data-axis-state-operation={operationState}>Operation {operationState}</span><span className="tool-state" data-axis-feature="AXIS-UI-07">Tool {toolNumber}</span><span className="position-state" data-axis-feature="AXIS-VIEW-17">{position}</span><span className="footer-status" role="status">{state.error ? `Error: ${state.error.code}` : commandStatus}</span></footer>
   </main>;