diff --git a/electron/ipc/captions/generate.ts b/electron/ipc/captions/generate.ts
index f74abf15..33c34584 100644
--- a/electron/ipc/captions/generate.ts
+++ b/electron/ipc/captions/generate.ts
@@ -12,9 +12,9 @@ import { resolveRecordingSession } from "../project/session";
 
 const execFileAsync = promisify(execFile);
 
-export async function ensureReadableFile(filePath: string, description: string) {
+export async function ensureReadableFile(filePath: string, options?: { executable?: boolean }) {
 	await fs.access(filePath, fsConstants.R_OK);
-	if (description === "whisper executable") {
+	if (options?.executable) {
 		try {
 			await fs.access(filePath, fsConstants.X_OK);
 		} catch {
@@ -113,7 +113,7 @@ export async function extractCaptionAudioSource(options: {
 
 	for (const candidate of candidates) {
 		try {
-			await ensureReadableFile(candidate.path, "video file");
+			await ensureReadableFile(candidate.path);
 			await execFileAsync(
 				options.ffmpegPath,
 				[
@@ -169,8 +169,8 @@ export async function generateAutoCaptionsFromVideo(options: {
 
 	const whisperExecutablePath = await resolveWhisperExecutablePath(options.whisperExecutablePath);
 	const whisperModelPath = path.resolve(options.whisperModelPath);
-	await ensureReadableFile(whisperExecutablePath, "whisper executable");
-	await ensureReadableFile(whisperModelPath, "whisper model");
+	await ensureReadableFile(whisperExecutablePath, { executable: true });
+	await ensureReadableFile(whisperModelPath);
 
 	const tempBase = path.join(
 		app.getPath("temp"),
diff --git a/electron/ipc/captions/whisper.ts b/electron/ipc/captions/whisper.ts
index 70a97ede..c8e774c6 100644
--- a/electron/ipc/captions/whisper.ts
+++ b/electron/ipc/captions/whisper.ts
@@ -41,7 +41,7 @@ export function downloadFileWithProgress(
 ): Promise<void> {
 	const request = (currentUrl: string, redirectCount = 0): Promise<void> => {
 		return new Promise((resolve, reject) => {
-			const req = httpsGet(currentUrl, (response) => {
+			const req = httpsGet(currentUrl, { timeout: 30_000 }, (response) => {
 				const statusCode = response.statusCode ?? 0;
 				const location = response.headers.location;
 
@@ -97,6 +97,9 @@ export function downloadFileWithProgress(
 			});
 
 			req.on("error", reject);
+			req.on("timeout", () => {
+				req.destroy(new Error("Whisper model download timed out."));
+			});
 		});
 	};
 
diff --git a/electron/ipc/cursor/interaction.ts b/electron/ipc/cursor/interaction.ts
index 81b8bbdb..f5ae15ca 100644
--- a/electron/ipc/cursor/interaction.ts
+++ b/electron/ipc/cursor/interaction.ts
@@ -183,7 +183,9 @@ export async function startInteractionCapture() {
 
 		hook.on("mousedown", onMouseDown);
 		hook.on("mouseup", onMouseUp);
-		hook.on("mousemove", onMouseMove);
+		if (process.platform === "linux") {
+			hook.on("mousemove", onMouseMove);
+		}
 
 		hook.start();
 
@@ -192,11 +194,15 @@ export async function startInteractionCapture() {
 				if (typeof hook.off === "function") {
 					hook.off("mousedown", onMouseDown);
 					hook.off("mouseup", onMouseUp);
-					hook.off("mousemove", onMouseMove);
+					if (process.platform === "linux") {
+						hook.off("mousemove", onMouseMove);
+					}
 				} else if (typeof hook.removeListener === "function") {
 					hook.removeListener("mousedown", onMouseDown);
 					hook.removeListener("mouseup", onMouseUp);
-					hook.removeListener("mousemove", onMouseMove);
+					if (process.platform === "linux") {
+						hook.removeListener("mousemove", onMouseMove);
+					}
 				}
 			} catch {
 				// ignore listener cleanup errors
diff --git a/electron/ipc/cursor/monitor.ts b/electron/ipc/cursor/monitor.ts
index 4943e523..0c39909a 100644
--- a/electron/ipc/cursor/monitor.ts
+++ b/electron/ipc/cursor/monitor.ts
@@ -1,6 +1,7 @@
 import { spawn } from "node:child_process";
 import { constants as fsConstants } from "node:fs";
 import fs from "node:fs/promises";
+import { BrowserWindow } from "electron";
 import type { CursorVisualType } from "../types";
 import {
 	currentCursorVisualType,
@@ -13,7 +14,6 @@ import {
 import { getCursorMonitorExePath, ensureNativeCursorMonitorBinary } from "../paths/binaries";
 
 export function emitCursorStateChanged(cursorType: CursorVisualType) {
-	const { BrowserWindow } = require("electron") as typeof import("electron");
 	BrowserWindow.getAllWindows().forEach((window) => {
 		if (!window.isDestroyed()) {
 			window.webContents.send("cursor-state-changed", { cursorType });
diff --git a/electron/ipc/ffmpeg/binary.ts b/electron/ipc/ffmpeg/binary.ts
index 095db5a8..c76acd40 100644
--- a/electron/ipc/ffmpeg/binary.ts
+++ b/electron/ipc/ffmpeg/binary.ts
@@ -6,13 +6,17 @@ import { app } from "electron";
 const nodeRequire = createRequire(import.meta.url);
 
 export function loadFfmpegStatic(): string | null {
-	const moduleExports = nodeRequire("ffmpeg-static");
-	if (typeof moduleExports === "string") {
-		return moduleExports;
-	}
+	try {
+		const moduleExports = nodeRequire("ffmpeg-static");
+		if (typeof moduleExports === "string") {
+			return moduleExports;
+		}
 
-	if (typeof moduleExports?.default === "string") {
-		return moduleExports.default as string;
+		if (typeof moduleExports?.default === "string") {
+			return moduleExports.default as string;
+		}
+	} catch {
+		// ffmpeg-static not available; fall through to system FFmpeg
 	}
 
 	return null;
diff --git a/electron/ipc/paths/binaries.ts b/electron/ipc/paths/binaries.ts
index c43cb97c..45ec80da 100644
--- a/electron/ipc/paths/binaries.ts
+++ b/electron/ipc/paths/binaries.ts
@@ -1,13 +1,16 @@
-import { spawnSync } from "node:child_process";
+import { execFile } from "node:child_process";
 import { existsSync, constants as fsConstants } from "node:fs";
 import fs from "node:fs/promises";
 import path from "node:path";
+import { promisify } from "node:util";
 import { app } from "electron";
 import {
 	nativeHelperMigrationPromise,
 	setNativeHelperMigrationPromise,
 } from "../state";
 
+const execFileAsync = promisify(execFile);
+
 /**
  * Resolve a path within the app bundle, handling asar unpacking in production.
  * Files listed in asarUnpack are extracted to app.asar.unpacked/ and must be
@@ -205,13 +208,14 @@ export async function ensureSwiftHelperBinary(
 		return binaryPath;
 	}
 
-	const result = spawnSync("swiftc", ["-O", sourcePath, "-o", binaryPath], {
-		encoding: "utf8",
-		timeout: 120000,
-	});
-
-	if (result.status !== 0) {
-		const details = [result.stderr, result.stdout].filter(Boolean).join("\n").trim();
+	try {
+		await execFileAsync("swiftc", ["-O", sourcePath, "-o", binaryPath], {
+			encoding: "utf8",
+			timeout: 120000,
+		});
+	} catch (error) {
+		const err = error as NodeJS.ErrnoException & { stdout?: string; stderr?: string };
+		const details = [err.stderr, err.stdout].filter(Boolean).join("\n").trim();
 		throw new Error(details || `Failed to compile ${label}`);
 	}
 
diff --git a/electron/ipc/project/manager.ts b/electron/ipc/project/manager.ts
index b3d09607..2db9e774 100644
--- a/electron/ipc/project/manager.ts
+++ b/electron/ipc/project/manager.ts
@@ -41,10 +41,11 @@ export function getAssetRootPath() {
 }
 
 export function isPathInsideDirectory(candidatePath: string, directoryPath: string) {
+	const normalizedCandidatePath = normalizePath(candidatePath);
 	const normalizedDirectoryPath = normalizePath(directoryPath);
 	return (
-		candidatePath === normalizedDirectoryPath ||
-		candidatePath.startsWith(`${normalizedDirectoryPath}${path.sep}`)
+		normalizedCandidatePath === normalizedDirectoryPath ||
+		normalizedCandidatePath.startsWith(`${normalizedDirectoryPath}${path.sep}`)
 	);
 }
 
@@ -52,9 +53,9 @@ export function isAllowedLocalReadPath(candidatePath: string) {
 	const allowedPrefixes = [RECORDINGS_DIR, USER_DATA_PATH, getAssetRootPath(), app.getPath("temp")];
 
 	return (
-		existsSync(candidatePath) ||
-		allowedPrefixes.some((prefix) => isPathInsideDirectory(candidatePath, prefix)) ||
-		approvedLocalReadPaths.has(candidatePath)
+		existsSync(candidatePath) &&
+		(allowedPrefixes.some((prefix) => isPathInsideDirectory(candidatePath, prefix)) ||
+			approvedLocalReadPaths.has(candidatePath))
 	);
 }
 
@@ -238,7 +239,10 @@ export async function buildProjectLibraryEntry(
 
 		return {
 			path: normalizedPath,
-			name: path.basename(normalizedPath).replace(/\.(recordly|openscreen)$/i, ""),
+			name: path.basename(normalizedPath).replace(
+			new RegExp(`\\.(${[PROJECT_FILE_EXTENSION, ...LEGACY_PROJECT_FILE_EXTENSIONS].join("|")})$`, "i"),
+			"",
+		),
 			updatedAt: stats.mtimeMs,
 			thumbnailPath: thumbnailExists ? thumbnailPath : null,
 			isCurrent: Boolean(
diff --git a/electron/ipc/project/session.ts b/electron/ipc/project/session.ts
index 429e7607..995f7193 100644
--- a/electron/ipc/project/session.ts
+++ b/electron/ipc/project/session.ts
@@ -65,7 +65,7 @@ export async function resolveRecordingSessionManifest(
 			return {
 				videoPath: normalizedVideoPath,
 				webcamPath: null,
-				timeOffsetMs: 0,
+				timeOffsetMs: normalizeRecordingTimeOffsetMs(parsed.timeOffsetMs),
 			};
 		}
 
diff --git a/electron/ipc/recording/diagnostics.ts b/electron/ipc/recording/diagnostics.ts
index 07bdfe13..9ce89a89 100644
--- a/electron/ipc/recording/diagnostics.ts
+++ b/electron/ipc/recording/diagnostics.ts
@@ -55,13 +55,9 @@ export async function probeMediaDurationSeconds(filePath: string): Promise<numbe
 		await execFileAsync(ffmpegPath, ["-i", filePath, "-hide_banner"], { timeout: 5000 });
 	} catch (error) {
 		const stderr = (error as NodeJS.ErrnoException & { stderr?: string })?.stderr ?? "";
-		const match = stderr.match(/Duration:\s*(\d{2}):(\d{2}):(\d{2})\.(\d{2,3})/);
-		if (match) {
-			const h = Number(match[1]);
-			const m = Number(match[2]);
-			const s = Number(match[3]);
-			const frac = Number(match[4]) / (match[4].length === 3 ? 1000 : 100);
-			return h * 3600 + m * 60 + s + frac;
+		const duration = parseFfmpegDurationSeconds(stderr);
+		if (duration !== null) {
+			return duration;
 		}
 	}
 	return 0;
diff --git a/electron/ipc/recording/ffmpeg.ts b/electron/ipc/recording/ffmpeg.ts
index 62f49dd7..39dbc5dc 100644
--- a/electron/ipc/recording/ffmpeg.ts
+++ b/electron/ipc/recording/ffmpeg.ts
@@ -1,4 +1,5 @@
 import type { ChildProcessWithoutNullStreams } from "node:child_process";
+import { access } from "node:fs/promises";
 import type { SelectedSource } from "../types";
 import {
 	ffmpegCaptureOutputBuffer,
@@ -165,7 +166,6 @@ export function waitForFfmpegCaptureStop(process: ChildProcessWithoutNullStreams
 			cleanup();
 
 			try {
-				const { access } = await import("node:fs/promises");
 				await access(outputPath);
 				if (code === 0 || code === null) {
 					resolve(outputPath);
diff --git a/electron/ipc/recording/prune.ts b/electron/ipc/recording/prune.ts
index cfd8a22d..1f1bda14 100644
--- a/electron/ipc/recording/prune.ts
+++ b/electron/ipc/recording/prune.ts
@@ -5,6 +5,7 @@ import {
 	AUTO_RECORDING_MAX_AGE_MS,
 	PROJECT_FILE_EXTENSION,
 	LEGACY_PROJECT_FILE_EXTENSIONS,
+	COMPANION_AUDIO_LAYOUTS,
 } from "../constants";
 import { currentVideoPath } from "../state";
 import { normalizePath, getTelemetryPathForVideo, isAutoRecordingPath, getRecordingsDir } from "../utils";
@@ -31,6 +32,7 @@ export { isAutoRecordingPath };
 
 export async function pruneAutoRecordings(exemptPaths: string[] = []) {
 	const recordingsDir = await getRecordingsDir();
+	await fs.mkdir(recordingsDir, { recursive: true });
 	const exempt = new Set(
 		[currentVideoPath, ...exemptPaths]
 			.filter((value): value is string => Boolean(value))
@@ -74,14 +76,12 @@ export async function pruneAutoRecordings(exemptPaths: string[] = []) {
 			await fs.rm(getTelemetryPathForVideo(entry.filePath), { force: true });
 			// Clean up companion audio files left from recording (macOS .m4a, Windows .wav)
 			const base = entry.filePath.replace(/\.(mp4|mov|webm)$/i, "");
-			for (const suffix of [
-				".system.m4a",
-				".mic.m4a",
-				".system.wav",
-				".mic.wav",
-				".mic.webm",
-				".system.webm",
-			]) {
+			const companionSuffixes = Array.from(
+				new Set(
+					COMPANION_AUDIO_LAYOUTS.flatMap((layout) => [layout.systemSuffix, layout.micSuffix]),
+				),
+			);
+			for (const suffix of companionSuffixes) {
 				await fs.rm(base + suffix, { force: true }).catch(() => undefined);
 			}
 		} catch (error) {
diff --git a/electron/ipc/recording/windows.ts b/electron/ipc/recording/windows.ts
index 76355b66..32c39cb4 100644
--- a/electron/ipc/recording/windows.ts
+++ b/electron/ipc/recording/windows.ts
@@ -32,21 +32,18 @@ const execFileAsync = promisify(execFile);
 export async function isNativeWindowsCaptureAvailable(): Promise<boolean> {
 	if (process.platform !== "win32") return false;
 
-	const helperPath = getWindowsCaptureExePath();
 	const os = await import("node:os");
 	const [major, , build] = os.release().split(".").map(Number);
 	const supported = major >= 10 && build >= 19041;
-	let helperExists = false;
+	if (!supported) return false;
 
 	try {
-		await fs.access(helperPath, fsConstants.X_OK);
-		helperExists = true;
+		await fs.access(getWindowsCaptureExePath(), fsConstants.X_OK);
 	} catch {
 		return false;
 	}
 
-	void helperExists;
-	return supported;
+	return true;
 }
 
 export function waitForWindowsCaptureStart(proc: ChildProcessWithoutNullStreams) {
diff --git a/electron/native/bin/darwin-arm64/recordly-native-cursor-monitor b/electron/native/bin/darwin-arm64/recordly-native-cursor-monitor
index fdd0bd08..e0e478f1 100755
Binary files a/electron/native/bin/darwin-arm64/recordly-native-cursor-monitor and b/electron/native/bin/darwin-arm64/recordly-native-cursor-monitor differ
diff --git a/electron/native/bin/darwin-arm64/recordly-screencapturekit-helper b/electron/native/bin/darwin-arm64/recordly-screencapturekit-helper
index ff4b8aa5..91b54570 100755
Binary files a/electron/native/bin/darwin-arm64/recordly-screencapturekit-helper and b/electron/native/bin/darwin-arm64/recordly-screencapturekit-helper differ
diff --git a/electron/native/bin/darwin-arm64/recordly-system-cursors b/electron/native/bin/darwin-arm64/recordly-system-cursors
index d6564426..f4b41ab6 100755
Binary files a/electron/native/bin/darwin-arm64/recordly-system-cursors and b/electron/native/bin/darwin-arm64/recordly-system-cursors differ
diff --git a/electron/native/bin/darwin-arm64/recordly-window-list b/electron/native/bin/darwin-arm64/recordly-window-list
index aa268ffd..76a7dab4 100755
Binary files a/electron/native/bin/darwin-arm64/recordly-window-list and b/electron/native/bin/darwin-arm64/recordly-window-list differ
diff --git a/electron/native/bin/darwin-x64/recordly-native-cursor-monitor b/electron/native/bin/darwin-x64/recordly-native-cursor-monitor
index 58bdf488..d577b1a6 100755
Binary files a/electron/native/bin/darwin-x64/recordly-native-cursor-monitor and b/electron/native/bin/darwin-x64/recordly-native-cursor-monitor differ
diff --git a/electron/native/bin/darwin-x64/recordly-screencapturekit-helper b/electron/native/bin/darwin-x64/recordly-screencapturekit-helper
index 831b8690..3696e45d 100755
Binary files a/electron/native/bin/darwin-x64/recordly-screencapturekit-helper and b/electron/native/bin/darwin-x64/recordly-screencapturekit-helper differ
diff --git a/electron/native/bin/darwin-x64/recordly-system-cursors b/electron/native/bin/darwin-x64/recordly-system-cursors
index 2c53fd68..54561362 100755
Binary files a/electron/native/bin/darwin-x64/recordly-system-cursors and b/electron/native/bin/darwin-x64/recordly-system-cursors differ
diff --git a/electron/native/bin/darwin-x64/recordly-window-list b/electron/native/bin/darwin-x64/recordly-window-list
index 949a66bd..e165257a 100755
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