lint: scope Node/mobile-compat rules off test and config files, tidy up a few regressions

- no-nodejs-modules, no-global-this, and prefer-create-el only exist
  to protect the shipped mobile bundle; scope them off for
  eslint.config.mts, vitest.config.ts, and src/__tests__/** since none
  of that runs inside Obsidian.
- Fix vitest.config.ts's __dirname the same way eslint.config.mts
  already was (fileURLToPath(import.meta.url)), since __dirname isn't
  defined under ESM.
- Disable no-empty-function (with a description) on the two
  intentionally-empty open()/close() mock methods introduced earlier.
- Drop the now-unused `error` catch binding left over from removing
  its console.log in an earlier commit.

eslint.config.mts

@@ -63,4 +63,15 @@ export default defineConfig(
 			'obsidianmd/commands/no-command-in-command-id': 'off',
 		},
 	},
+	{
+		files: ['eslint.config.mts', 'vitest.config.ts', 'src/__tests__/**'],
+		rules: {
+			// These only run under Node (eslint/vitest CLI), never bundled
+			// into main.js or loaded inside Obsidian, so the mobile/runtime
+			// compatibility rationale behind these rules doesn't apply here.
+			'obsidianmd/no-nodejs-modules': 'off',
+			'obsidianmd/no-global-this': 'off',
+			'obsidianmd/prefer-create-el': 'off',
+		},
+	},
 );

src/__tests__/__mocks__/obsidian.ts

@@ -27,14 +27,18 @@ export class FuzzySuggestModal<T> {
 	public app: unknown;
 	protected declare items: T[];
 	public constructor(app: unknown) { this.app = app; }
+	// eslint-disable-next-line @typescript-eslint/no-empty-function -- minimal test double, no-op is intentional
 	public open(): void {}
+	// eslint-disable-next-line @typescript-eslint/no-empty-function -- minimal test double, no-op is intentional
 	public close(): void {}
 }
 export class SuggestModal<T> {
 	public app: unknown;
 	protected declare items: T[];
 	public constructor(app: unknown) { this.app = app; }
+	// eslint-disable-next-line @typescript-eslint/no-empty-function -- minimal test double, no-op is intentional
 	public open(): void {}
+	// eslint-disable-next-line @typescript-eslint/no-empty-function -- minimal test double, no-op is intentional
 	public close(): void {}
 }
 export class PluginSettingTab {

src/manager/commands/menuManager.ts

@@ -161,7 +161,7 @@ abstract class Base extends CommandManagerBase {
 							const pair = await chooseNewCommand(plugin);
 							commandList.push(pair);
 							await plugin.saveSettings();
-						} catch (error) {
+						} catch {
 							// User cancelled command/icon selection, nothing to do
 						}
 					});

vitest.config.ts

@@ -1,5 +1,8 @@
 import { defineConfig } from "vitest/config";
 import path from "path";
+import { fileURLToPath } from "url";
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
 
 export default defineConfig({
 	test: {