Update icon paths and improve Windows yt-dlp command resolution

package.json

@@ -123,7 +123,7 @@
     "productName": "SubMiner",
     "executableName": "SubMiner",
     "artifactName": "SubMiner-${version}.${ext}",
-    "icon": "assets/SubMiner.png",
+    "icon": "assets/SubMiner-square.png",
     "directories": {
       "output": "release"
     },
@@ -142,7 +142,7 @@
         "zip"
       ],
       "category": "public.app-category.video",
-      "icon": "assets/SubMiner.png",
+      "icon": "assets/SubMiner-square.png",
       "hardenedRuntime": true,
       "entitlements": "build/entitlements.mac.plist",
       "entitlementsInherit": "build/entitlements.mac.plist",

src/core/services/yomitan-extension-paths.ts

@@ -68,6 +68,15 @@ export function resolveExternalYomitanExtensionPath(
     return null;
   }
 
-  const candidate = path.join(path.resolve(normalizedProfilePath), 'extensions', 'yomitan');
-  return existsSync(path.join(candidate, 'manifest.json')) ? candidate : null;
+  const candidate = path.join(normalizedProfilePath, 'extensions', 'yomitan');
+  const fallbackCandidate = path.join(path.resolve(normalizedProfilePath), 'extensions', 'yomitan');
+
+  const candidates = candidate === fallbackCandidate ? [candidate] : [candidate, fallbackCandidate];
+  for (const root of candidates) {
+    if (existsSync(path.join(root, 'manifest.json'))) {
+      return root;
+    }
+  }
+
+  return null;
 }

src/core/services/youtube/ytdlp-command.ts

@@ -1,5 +1,44 @@
+import fs from 'node:fs';
+import path from 'node:path';
+
 const DEFAULT_YTDLP_COMMAND = 'yt-dlp';
+const WINDOWS_YTDLP_COMMANDS = ['yt-dlp.cmd', 'yt-dlp.exe', 'yt-dlp'];
+
+function resolveFromPath(commandName: string): string | null {
+  if (!process.env.PATH) {
+    return null;
+  }
+
+  const searchPaths = process.env.PATH.split(path.delimiter);
+  for (const searchPath of searchPaths) {
+    const candidate = path.join(searchPath, commandName);
+    try {
+      fs.accessSync(candidate, fs.constants.X_OK);
+      return candidate;
+    } catch {
+      continue;
+    }
+  }
+
+  return null;
+}
 
 export function getYoutubeYtDlpCommand(): string {
-  return process.env.SUBMINER_YTDLP_BIN?.trim() || DEFAULT_YTDLP_COMMAND;
+  const explicitCommand = process.env.SUBMINER_YTDLP_BIN?.trim();
+  if (explicitCommand) {
+    return explicitCommand;
+  }
+
+  if (process.platform !== 'win32') {
+    return DEFAULT_YTDLP_COMMAND;
+  }
+
+  for (const commandName of WINDOWS_YTDLP_COMMANDS) {
+    const resolved = resolveFromPath(commandName);
+    if (resolved) {
+      return resolved;
+    }
+  }
+
+  return DEFAULT_YTDLP_COMMAND;
 }