sda

public/assets/js/fakecheck/fakecheck.browser.js

@@ -0,0 +1,660 @@
+// /public/assets/js/fakecheck/fakecheck.browser.js
+
+(function () {
+    // Core / Namespace muss geladen sein
+    if (!window.usbcheck) return;
+
+    const {
+        cfg,
+        log: logLine,
+        setStatus,
+        setModeLabel,
+        setProgress,
+        setOverallStatus,
+        formatBytes,
+        formatMbps,
+        formatDuration
+    } = window.usbcheck;
+
+    const root = document.getElementById("fc-root");
+    if (!root) {
+        // Seite ohne Fakecheck-Tool → nichts tun
+        return;
+    }
+
+    // --- DOM-Helper ---------------------------------------------------------
+    const $  = (sel) => document.querySelector(sel);
+    const $$ = (sel) => Array.from(document.querySelectorAll(sel));
+
+    const fsapiWarning     = $("#fc-fsapi-warning");
+    const selectedPathText = $("#fc-selected-path-label");
+    const saveHint         = $("#fc-save-hint");
+    const saveError        = $("#fc-save-error");
+
+    const resMode        = $("#fc-res-mode");
+    const resDuration    = $("#fc-res-duration");
+    const resWriteSpeed  = $("#fc-res-write-speed");
+    const resReadSpeed   = $("#fc-res-read-speed");
+    const resWritten     = $("#fc-res-written-bytes");
+    const resVerified    = $("#fc-res-verified-bytes");
+
+    const btnPickDir  = $("#fc-btn-pick-directory");
+    const btnClearSel = $("#fc-btn-clear-selection");
+    const btnStart    = $("#fc-btn-start-tests");
+    const btnCancel   = $("#fc-btn-cancel-tests");
+    const modeTiles   = $$("#fc-mode-grid .fc-mode-tile");
+
+    // Login-Indikator
+    if (cfg.loggedIn && saveHint) {
+        saveHint.style.display = "block";
+    }
+
+    // --- Test-Engine (Browser) ---------------------------------------------
+
+    class UsbBrowserTester {
+        constructor() {
+            this.rootHandle = null;
+            this.abortController = null;
+        }
+
+        hasFsApiSupport() {
+            return "showDirectoryPicker" in window;
+        }
+
+        // Wird aktuell nicht mehr verwendet (Picker ist direkt im Click-Handler),
+        // kann aber als Fallback/Refactoring-Hook bleiben.
+        async pickDirectory() {
+            if (!this.hasFsApiSupport()) {
+                throw new Error("File System Access API wird von diesem Browser nicht unterstützt.");
+            }
+            const handle = await window.showDirectoryPicker();
+            this.rootHandle = handle;
+            return handle;
+        }
+
+        async clearSelection() {
+            this.rootHandle = null;
+        }
+
+        async runQuickCheck(report, progressCb, abortSignal) {
+            const TEST_FILENAME = "usbcheck_quick_test.bin";
+            const TEST_SIZE_MB  = 8;
+            const CHUNK_SIZE    = 1024 * 1024;
+
+            const dirHandle = this.rootHandle;
+            if (!dirHandle) throw new Error("Kein Verzeichnis ausgewählt.");
+
+            logLine("Quick-Check: Vorbereitung...", "info");
+            const fileHandle = await dirHandle.getFileHandle(TEST_FILENAME, { create: true });
+            const writable   = await fileHandle.createWritable();
+
+            const totalBytes = TEST_SIZE_MB * 1024 * 1024;
+            let writtenBytes = 0;
+
+            const writeStart = performance.now();
+            while (writtenBytes < totalBytes) {
+                if (abortSignal.aborted) {
+                    await writable.abort();
+                    throw new DOMException("Abgebrochen", "AbortError");
+                }
+                const remaining = totalBytes - writtenBytes;
+                const chunkLen  = Math.min(CHUNK_SIZE, remaining);
+                const chunk     = new Uint8Array(chunkLen);
+                for (let i = 0; i < chunkLen; i++) {
+                    chunk[i] = (i + writtenBytes) % 251;
+                }
+                await writable.write(chunk);
+                writtenBytes += chunkLen;
+                progressCb((writtenBytes / totalBytes) * 100 * 0.5);
+            }
+            await writable.close();
+            const writeEnd = performance.now();
+
+            logLine("Quick-Check: Schreiben abgeschlossen. Verifiziere Daten...", "info");
+
+            const file = await fileHandle.getFile();
+            const readStart = performance.now();
+
+            const reader = file.stream().getReader();
+            let offset = 0;
+            let verifiedBytes = 0;
+            while (true) {
+                if (abortSignal.aborted) {
+                    reader.cancel();
+                    throw new DOMException("Abgebrochen", "AbortError");
+                }
+                const { done, value } = await reader.read();
+                if (done) break;
+                const chunk = value;
+                for (let i = 0; i < chunk.length; i++) {
+                    const expected = (offset + i) % 251;
+                    if (chunk[i] !== expected) {
+                        logLine(`Quick-Check: Datenfehler bei Byte ${offset + i}`, "error");
+                        throw new Error(`Datenfehler im Quick-Check bei Byte ${offset + i}`);
+                    }
+                }
+                offset += chunk.length;
+                verifiedBytes += chunk.length;
+                progressCb(50 + (verifiedBytes / totalBytes) * 100 * 0.5);
+            }
+
+            const readEnd = performance.now();
+
+            const writeSeconds = (writeEnd - writeStart) / 1000;
+            const readSeconds  = (readEnd - readStart) / 1000;
+
+            report.quick = {
+                mode: "quick",
+                test_file: TEST_FILENAME,
+                size_bytes: totalBytes,
+                write_bytes: writtenBytes,
+                read_bytes: verifiedBytes,
+                write_duration_s: writeSeconds,
+                read_duration_s: readSeconds,
+                write_mbit_s: writeSeconds ? (writtenBytes * 8 / (writeSeconds * 1e6)) : null,
+                read_mbit_s:  readSeconds  ? (verifiedBytes * 8 / (readSeconds * 1e6)) : null,
+                ok: true
+            };
+
+            logLine("Quick-Check: Erfolgreich abgeschlossen.", "info");
+        }
+
+        async runBenchmark(report, progressCb, abortSignal) {
+            const TEST_FILENAME = "usbcheck_benchmark.bin";
+            const TEST_SIZE_MB  = 32;
+            const CHUNK_SIZE    = 1024 * 1024;
+
+            const dirHandle = this.rootHandle;
+            if (!dirHandle) throw new Error("Kein Verzeichnis ausgewählt.");
+
+            logLine("Benchmark: Start – schreibe Testdatei...", "info");
+            const fileHandle = await dirHandle.getFileHandle(TEST_FILENAME, { create: true });
+            const writable   = await fileHandle.createWritable();
+
+            const totalBytes = TEST_SIZE_MB * 1024 * 1024;
+            let writtenBytes = 0;
+
+            const writeStart = performance.now();
+            while (writtenBytes < totalBytes) {
+                if (abortSignal.aborted) {
+                    await writable.abort();
+                    throw new DOMException("Abgebrochen", "AbortError");
+                }
+                const remaining = totalBytes - writtenBytes;
+                const chunkLen  = Math.min(CHUNK_SIZE, remaining);
+                const chunk     = new Uint8Array(chunkLen);
+                for (let i = 0; i < chunkLen; i++) {
+                    chunk[i] = 0xaa;
+                }
+                await writable.write(chunk);
+                writtenBytes += chunkLen;
+                progressCb((writtenBytes / totalBytes) * 100 * 0.4);
+            }
+            await writable.close();
+            const writeEnd = performance.now();
+
+            logLine("Benchmark: Lesen & Timing...", "info");
+
+            const file = await fileHandle.getFile();
+            const readStart = performance.now();
+            const reader = file.stream().getReader();
+            let readBytes = 0;
+            while (true) {
+                if (abortSignal.aborted) {
+                    reader.cancel();
+                    throw new DOMException("Abgebrochen", "AbortError");
+                }
+                const { done, value } = await reader.read();
+                if (done) break;
+                readBytes += value.length;
+                progressCb(40 + (readBytes / totalBytes) * 100 * 0.6);
+            }
+            const readEnd = performance.now();
+
+            const writeSeconds = (writeEnd - writeStart) / 1000;
+            const readSeconds  = (readEnd - readStart) / 1000;
+
+            report.benchmark = {
+                mode: "benchmark",
+                test_file: TEST_FILENAME,
+                size_bytes: totalBytes,
+                write_bytes: writtenBytes,
+                read_bytes: readBytes,
+                write_duration_s: writeSeconds,
+                read_duration_s: readSeconds,
+                write_mbit_s: writeSeconds ? (writtenBytes * 8 / (writeSeconds * 1e6)) : null,
+                read_mbit_s:  readSeconds  ? (readBytes  * 8 / (readSeconds  * 1e6)) : null,
+                ok: true
+            };
+
+            logLine("Benchmark: Erfolgreich abgeschlossen.", "info");
+        }
+
+        async runWriteVerify(report, progressCb, abortSignal) {
+            const BASE_FILENAME = "usbcheck_block_";
+            const BLOCKS        = 4;
+            const BLOCK_SIZE_MB = 32;
+            const CHUNK_SIZE    = 1024 * 1024;
+
+            const dirHandle = this.rootHandle;
+            if (!dirHandle) throw new Error("Kein Verzeichnis ausgewählt.");
+
+            logLine("Write/Verify: Start – mehrere Blöcke werden getestet...", "info");
+
+            const totalBytes = BLOCKS * BLOCK_SIZE_MB * 1024 * 1024;
+            let writtenBytes = 0;
+            let verifiedBytes = 0;
+
+            const globalStart = performance.now();
+            const writeDetails = [];
+            const readDetails  = [];
+
+            for (let b = 0; b < BLOCKS; b++) {
+                const filename = `${BASE_FILENAME}${String(b + 1).padStart(2, "0")}.bin`;
+                logLine(`Write/Verify: Block ${b + 1}/${BLOCKS} – ${filename}`, "info");
+
+                const fileHandle = await dirHandle.getFileHandle(filename, { create: true });
+                const writable   = await fileHandle.createWritable();
+
+                const blockBytes = BLOCK_SIZE_MB * 1024 * 1024;
+                let blockWritten = 0;
+                const blockWriteStart = performance.now();
+
+                while (blockWritten < blockBytes) {
+                    if (abortSignal.aborted) {
+                        await writable.abort();
+                        throw new DOMException("Abgebrochen", "AbortError");
+                    }
+                    const remaining = blockBytes - blockWritten;
+                    const chunkLen  = Math.min(CHUNK_SIZE, remaining);
+                    const chunk     = new Uint8Array(chunkLen);
+                    for (let i = 0; i < chunkLen; i++) {
+                        chunk[i] = (i + blockWritten + b * 13) % 251;
+                    }
+                    await writable.write(chunk);
+                    blockWritten  += chunkLen;
+                    writtenBytes  += chunkLen;
+                    const progress = (writtenBytes + verifiedBytes) / (totalBytes * 2) * 100;
+                    progressCb(progress);
+                }
+                await writable.close();
+                const blockWriteEnd = performance.now();
+                writeDetails.push({
+                    block: b + 1,
+                    bytes: blockBytes,
+                    duration_s: (blockWriteEnd - blockWriteStart) / 1000
+                });
+
+                const file = await fileHandle.getFile();
+                const reader = file.stream().getReader();
+                let blockOffset = 0;
+                const blockReadStart = performance.now();
+
+                while (true) {
+                    if (abortSignal.aborted) {
+                        reader.cancel();
+                        throw new DOMException("Abgebrochen", "AbortError");
+                    }
+                    const { done, value } = await reader.read();
+                    if (done) break;
+                    const chunk = value;
+                    for (let i = 0; i < chunk.length; i++) {
+                        const expected = (i + blockOffset + b * 13) % 251;
+                        if (chunk[i] !== expected) {
+                            logLine(`Write/Verify: Datenfehler in Block ${b + 1} bei Byte ${blockOffset + i}`, "error");
+                            throw new Error(`Datenfehler in Block ${b + 1} bei Byte ${blockOffset + i}`);
+                        }
+                    }
+                    blockOffset   += chunk.length;
+                    verifiedBytes += chunk.length;
+                    const progress = (writtenBytes + verifiedBytes) / (totalBytes * 2) * 100;
+                    progressCb(progress);
+                }
+                const blockReadEnd = performance.now();
+                readDetails.push({
+                    block: b + 1,
+                    bytes: blockBytes,
+                    duration_s: (blockReadEnd - blockReadStart) / 1000
+                });
+            }
+
+            const globalEnd = performance.now();
+            const totalDuration = (globalEnd - globalStart) / 1000;
+
+            const sumWrite = writeDetails.reduce((acc, d) => acc + d.bytes, 0);
+            const sumRead  = readDetails.reduce((acc, d) => acc + d.bytes, 0);
+            const writeSec = writeDetails.reduce((acc, d) => acc + d.duration_s, 0);
+            const readSec  = readDetails.reduce((acc, d) => acc + d.duration_s, 0);
+
+            report.writeverify = {
+                mode: "writeverify",
+                blocks: BLOCKS,
+                block_size_mb: BLOCK_SIZE_MB,
+                total_bytes: totalBytes,
+                written_bytes: writtenBytes,
+                verified_bytes: verifiedBytes,
+                write_duration_s: writeSec,
+                read_duration_s: readSec,
+                write_mbit_s: writeSec ? (sumWrite * 8 / (writeSec * 1e6)) : null,
+                read_mbit_s:  readSec  ? (sumRead  * 8 / (readSec  * 1e6)) : null,
+                ok: true
+            };
+
+            report.writeverify_total_duration_s = totalDuration;
+
+            logLine("Write/Verify: Alle Blöcke erfolgreich verifiziert.", "info");
+        }
+
+        async run(mode, updateProgressCb, abortSignal) {
+            if (!this.rootHandle) {
+                throw new Error("Kein USB-Verzeichnis ausgewählt.");
+            }
+
+            const report = {
+                meta: {
+                    base_url: cfg.baseUrl || "",
+                    locale: cfg.locale || "en",
+                    user_agent: navigator.userAgent,
+                    started_at: new Date().toISOString()
+                },
+                tool: "usbcheck_browser",
+                tool_version: "0.1.0",
+                mode_requested: mode,
+                quick: null,
+                benchmark: null,
+                writeverify: null,
+                total_duration_s: null
+            };
+
+            const t0 = performance.now();
+
+            if (mode === "quick") {
+                await this.runQuickCheck(report, updateProgressCb, abortSignal);
+            } else if (mode === "benchmark") {
+                await this.runBenchmark(report, updateProgressCb, abortSignal);
+            } else if (mode === "writeverify") {
+                await this.runWriteVerify(report, updateProgressCb, abortSignal);
+            } else if (mode === "all") {
+                // Alle drei Tests nacheinander im selben Report
+                const modes = ["quick", "benchmark", "writeverify"];
+                for (let i = 0; i < modes.length; i++) {
+                    const subMode = modes[i];
+                    logLine(`All-Inclusive: Starte Teiltest "${subMode}" (${i + 1}/${modes.length})...`, "info");
+
+                    const base  = (i / modes.length) * 100;
+                    const span  = (1 / modes.length) * 100;
+                    const mapProgress = (p) => {
+                        const mapped = base + (p / 100) * span;
+                        updateProgressCb(mapped);
+                    };
+
+                    if (subMode === "quick") {
+                        await this.runQuickCheck(report, mapProgress, abortSignal);
+                    } else if (subMode === "benchmark") {
+                        await this.runBenchmark(report, mapProgress, abortSignal);
+                    } else if (subMode === "writeverify") {
+                        await this.runWriteVerify(report, mapProgress, abortSignal);
+                    }
+                }
+            } else {
+                throw new Error("Unbekannter Modus: " + mode);
+            }
+
+            const t1 = performance.now();
+            report.total_duration_s = (t1 - t0) / 1000;
+            report.meta.ended_at = new Date().toISOString();
+
+            return report;
+        }
+    }
+
+    const tester = new UsbBrowserTester();
+    let currentMode = null;
+    let isRunning   = false;
+
+    if (!tester.hasFsApiSupport()) {
+        if (fsapiWarning) fsapiWarning.style.display = "block";
+        logLine(
+            "Dein Browser unterstützt die File System Access API nicht voll. Einige Funktionen sind deaktiviert.",
+            "warn"
+        );
+    }
+
+    function updateStartButtonState() {
+        const hasDir  = !!tester.rootHandle;
+        const hasMode = !!currentMode;
+        if (btnStart)  btnStart.disabled  = !(hasDir && hasMode && !isRunning);
+        if (btnCancel) btnCancel.disabled = !isRunning;
+    }
+
+    // --- Event-Handler ------------------------------------------------------
+
+    // Wichtig: showDirectoryPicker direkt im Click-Handler per Promise,
+    // kein async/await direkt im Listener → vermeidet "User activation is required".
+    let isPickingDir = false;
+
+    if (btnPickDir) {
+        btnPickDir.addEventListener("click", () => {
+            if (isPickingDir) return;
+            isPickingDir = true;
+
+            if (!("showDirectoryPicker" in window)) {
+                logLine("File System Access API wird von diesem Browser nicht unterstützt.", "error");
+                if (fsapiWarning) fsapiWarning.style.display = "block";
+                isPickingDir = false;
+                return;
+            }
+
+            window.showDirectoryPicker()
+                .then((handle) => {
+                    tester.rootHandle = handle;
+                    if (selectedPathText) {
+                        selectedPathText.textContent =
+                            'USB-Ordner ausgewählt (Name: "' + (handle.name || "Unbekannt") + '").';
+                    }
+                    if (btnClearSel) btnClearSel.disabled = false;
+                    setStatus("USB-Verzeichnis ausgewählt. Wähle jetzt einen Testmodus.");
+                    logLine("Verzeichnis ausgewählt: " + (handle.name || "[ohne Namen]"));
+                    updateStartButtonState();
+                })
+                .catch((err) => {
+                    if (err && err.name === "AbortError") {
+                        logLine("Verzeichnisauswahl abgebrochen.", "warn");
+                    } else if (err) {
+                        logLine("Fehler bei Verzeichnisauswahl: " + err.message, "error");
+                    } else {
+                        logLine("Unbekannter Fehler bei Verzeichnisauswahl.", "error");
+                    }
+                })
+                .finally(() => {
+                    isPickingDir = false;
+                });
+        });
+    }
+
+    if (btnClearSel) {
+        btnClearSel.addEventListener("click", async () => {
+            await tester.clearSelection();
+            if (selectedPathText) {
+                selectedPathText.textContent = "Noch kein Verzeichnis gewählt.";
+            }
+            btnClearSel.disabled = true;
+            setStatus("Bereit. Wähle zuerst deinen USB-Stick aus.");
+            logLine("Verzeichnisauswahl zurückgesetzt.", "info");
+            updateStartButtonState();
+        });
+    }
+
+    modeTiles.forEach((tile) => {
+        tile.addEventListener("click", () => {
+            if (tile.classList.contains("disabled")) return;
+            if (isRunning) return;
+            modeTiles.forEach((t) => t.classList.remove("selected"));
+            tile.classList.add("selected");
+            currentMode = tile.getAttribute("data-mode");
+            const titleEl = tile.querySelector("h4");
+            const label = titleEl ? titleEl.textContent : currentMode;
+            setModeLabel(label || "");
+            setStatus(`Modus "${label}" ausgewählt. Du kannst den Test jetzt starten.`);
+            logLine("Modus gewählt: " + currentMode, "info");
+            updateStartButtonState();
+        });
+    });
+
+    if (btnStart) {
+        btnStart.addEventListener("click", async () => {
+            if (!currentMode || !tester.rootHandle || isRunning) return;
+            isRunning = true;
+            updateStartButtonState();
+            if (btnCancel) btnCancel.disabled = false;
+            if (saveError) saveError.style.display = "none";
+            setProgress(0);
+            logLine("Starte Tests im Modus: " + currentMode.toUpperCase(), "info");
+            setStatus("Test läuft... bitte USB-Stick nicht entfernen.");
+            setOverallStatus("warn", "Test läuft...");
+
+            const abortController = new AbortController();
+            tester.abortController = abortController;
+
+            const updateProgressCb = (percent) => setProgress(percent);
+            let report = null;
+
+            try {
+                report = await tester.run(currentMode, updateProgressCb, abortController.signal);
+
+                setProgress(100);
+                setStatus("Test abgeschlossen.");
+                setOverallStatus("ok", "Browser-Test erfolgreich abgeschlossen.");
+                applyReportToDashboard(report);
+
+                console.log("USB Browser Test Report (fakecheck):", report);
+
+                await saveReportToBackend(report);
+            } catch (err) {
+                if (err && err.name === "AbortError") {
+                    setStatus("Test wurde abgebrochen.");
+                    setOverallStatus("warn", "Test abgebrochen.");
+                    logLine("Test wurde vom Benutzer abgebrochen.", "warn");
+                } else if (err) {
+                    setStatus("Fehler: " + err.message);
+                    setOverallStatus("bad", "Fehler im Browser-Test.");
+                    logLine("Fehler im Test: " + err.message, "error");
+                } else {
+                    setStatus("Unbekannter Fehler im Test.");
+                    setOverallStatus("bad", "Fehler im Browser-Test.");
+                    logLine("Unbekannter Fehler im Test.", "error");
+                }
+            } finally {
+                isRunning = false;
+                tester.abortController = null;
+                updateStartButtonState();
+                if (btnCancel) btnCancel.disabled = true;
+            }
+        });
+    }
+
+    if (btnCancel) {
+        btnCancel.addEventListener("click", () => {
+            if (!isRunning || !tester.abortController) return;
+            tester.abortController.abort();
+        });
+    }
+
+    // --- Dashboard-Füllung --------------------------------------------------
+
+    function applyReportToDashboard(report) {
+        const modeLabelMap = {
+            quick: "Quick-Check",
+            benchmark: "Benchmark",
+            writeverify: "Write & Verify",
+            all: "All-Inclusive (alle Browser-Tests)"
+        };
+
+        if (resMode) {
+            resMode.textContent = modeLabelMap[report.mode_requested] || report.mode_requested || "–";
+        }
+        if (resDuration) {
+            resDuration.textContent = formatDuration(report.total_duration_s);
+        }
+
+        let aggWriteBytes = 0;
+        let aggReadBytes  = 0;
+        let writeSec = 0;
+        let readSec  = 0;
+
+        if (report.quick) {
+            aggWriteBytes += report.quick.write_bytes || 0;
+            aggReadBytes  += report.quick.read_bytes  || 0;
+            writeSec      += report.quick.write_duration_s || 0;
+            readSec       += report.quick.read_duration_s  || 0;
+        }
+        if (report.benchmark) {
+            aggWriteBytes += report.benchmark.write_bytes || 0;
+            aggReadBytes  += report.benchmark.read_bytes  || 0;
+            writeSec      += report.benchmark.write_duration_s || 0;
+            readSec       += report.benchmark.read_duration_s  || 0;
+        }
+        if (report.writeverify) {
+            aggWriteBytes += report.writeverify.written_bytes || 0;
+            aggReadBytes  += report.writeverify.verified_bytes || 0;
+            writeSec      += report.writeverify.write_duration_s || 0;
+            readSec       += report.writeverify.read_duration_s  || 0;
+        }
+
+        if (resWritten) {
+            resWritten.textContent = aggWriteBytes ? formatBytes(aggWriteBytes) : "–";
+        }
+        if (resVerified) {
+            resVerified.textContent = aggReadBytes ? formatBytes(aggReadBytes) : "–";
+        }
+
+        const avgWriteMbps = (aggWriteBytes && writeSec) ? formatMbps(aggWriteBytes, writeSec) : "–";
+        const avgReadMbps  = (aggReadBytes  && readSec)  ? formatMbps(aggReadBytes,  readSec)  : "–";
+
+        if (resWriteSpeed) resWriteSpeed.textContent = avgWriteMbps;
+        if (resReadSpeed)  resReadSpeed.textContent  = avgReadMbps;
+    }
+
+    // --- Backend-Speicherung ------------------------------------------------
+
+    async function saveReportToBackend(report) {
+        const url = "/api/result/browser-quick-test.php";
+        try {
+            const response = await fetch(url, {
+                method: "POST",
+                headers: {
+                    "Content-Type": "application/json"
+                },
+                body: JSON.stringify(report),
+                credentials: "include"
+            });
+
+            if (!response.ok) {
+                const msg = "HTTP " + response.status;
+                logLine("Backend: Konnte Ergebnis nicht speichern (" + msg + ").", "warn");
+                if (response.status >= 500 && saveError) {
+                    saveError.style.display = "block";
+                }
+                return;
+            }
+
+            const data = await response.json().catch(() => null);
+            logLine(
+                "Backend: Testergebnis gespeichert" +
+                (data && data.id ? ` (ID: ${data.id})` : ""),
+                "info"
+            );
+        } catch (err) {
+            if (saveError) saveError.style.display = "block";
+            logLine("Fehler beim Speichern im Backend: " + (err ? err.message : "unbekannt"), "error");
+        }
+    }
+
+    // --- Initialzustand -----------------------------------------------------
+
+    setStatus("Bereit. Wähle zuerst deinen USB-Stick aus.");
+    setModeLabel("Kein Modus selektiert");
+    setOverallStatus("ok", "Noch kein Test durchgeführt.");
+    logLine("USB-Browser-Test (fakecheck) geladen. Warte auf Verzeichnisauswahl und Modus.");
+    updateStartButtonState();
+})();