feat: refresh dashboard settings UX and Codex feature toggles (#153)

* feat: refresh dashboard settings UX and Codex feature toggles

Improve settings/tasks mobile layout, model effort validation by agent type, and preset models for GPT 5.5 and Opus 4.7. Store Codex fast mode and goals in config.toml with Claude fastMode session sync and updated docs for Codex 0.133.

Co-authored-by: Cursor <cursoragent@cursor.com>

* style: apply pre-commit formatting after dashboard settings commit

Co-authored-by: Cursor <cursoragent@cursor.com>

---------

Co-authored-by: Cursor <cursoragent@cursor.com>

src/codex-config-features.ts

@@ -0,0 +1,84 @@
+import fs from 'node:fs';
+import os from 'node:os';
+import path from 'node:path';
+
+export type CodexConfigFeature = 'fast_mode' | 'goals';
+
+export function codexConfigPath(): string {
+  const override = process.env.EJCLAW_CODEX_CONFIG_PATH?.trim();
+  if (override) return override;
+  const home = process.env.EJCLAW_SETTINGS_HOME || os.homedir();
+  return path.join(home, '.codex', 'config.toml');
+}
+
+export function readCodexFeatureFromContent(
+  content: string,
+  feature: CodexConfigFeature,
+): boolean {
+  const lines = content.split('\n');
+  let inFeatures = false;
+
+  for (const line of lines) {
+    const trimmed = line.trim();
+    if (trimmed === '[features]') {
+      inFeatures = true;
+      continue;
+    }
+    if (inFeatures && trimmed.startsWith('[') && trimmed.endsWith(']')) {
+      break;
+    }
+    if (!inFeatures) continue;
+    const match = trimmed.match(
+      new RegExp(`^${feature}\\s*=\\s*(true|false)$`),
+    );
+    if (match) return match[1] === 'true';
+  }
+
+  return false;
+}
+
+export function readCodexFeatureFromFile(
+  filePath: string,
+  feature: CodexConfigFeature,
+): boolean {
+  if (!fs.existsSync(filePath)) return false;
+  return readCodexFeatureFromContent(
+    fs.readFileSync(filePath, 'utf-8'),
+    feature,
+  );
+}
+
+export function writeCodexFeatureInContent(
+  content: string,
+  feature: CodexConfigFeature,
+  value: boolean,
+): string {
+  const line = `${feature} = ${value}`;
+  const re = new RegExp(`^\\s*${feature}\\s*=\\s*(true|false)\\s*$`, 'm');
+  if (re.test(content)) {
+    return content.replace(re, line);
+  }
+  if (/^\[features\]/m.test(content)) {
+    return content.replace(/^\[features\]\s*$/m, `[features]\n${line}`);
+  }
+  const trimmed = content.replace(/\s*$/, '');
+  if (!trimmed) {
+    return `[features]\n${line}\n`;
+  }
+  return `${trimmed}\n\n[features]\n${line}\n`;
+}
+
+export function writeCodexFeatureToFile(
+  filePath: string,
+  feature: CodexConfigFeature,
+  value: boolean,
+): void {
+  const content = fs.existsSync(filePath)
+    ? fs.readFileSync(filePath, 'utf-8')
+    : '';
+  const updated = writeCodexFeatureInContent(content, feature, value);
+  fs.mkdirSync(path.dirname(filePath), { recursive: true });
+  const tempPath = `${filePath}.tmp`;
+  fs.writeFileSync(tempPath, updated, { mode: 0o600 });
+  fs.renameSync(tempPath, filePath);
+}