feat: replace browser login with imported Reddit sessions

tests/config.test.ts

@@ -210,7 +210,6 @@ describe('ConfigSchema', () => {
       expect(result.success).toBe(true);
       if (result.success) {
         expect(result.data.browser.sessionDir).toBe('./data/browser-session');
-        expect(result.data.browser.headless).toBe(false);
         expect(result.data.browser.dryRun).toBe(false);
       }
     });
@@ -294,7 +293,7 @@ describe('ConfigSchema', () => {
 describe('loadConfig', () => {
   const originalCwd = process.cwd;
   const savedEnv: Record<string, string | undefined> = {};
-  const trackedEnvKeys = ['OPENROUTER_API_KEY', 'REDDIT_USERNAME', 'REDDIT_PASSWORD', 'BROWSER_HEADLESS', 'WEB_DASHBOARD_TOKEN'];
+  const trackedEnvKeys = ['OPENROUTER_API_KEY', 'WEB_DASHBOARD_TOKEN'];
 
   beforeEach(() => {
     // Snapshot then clear any env vars that loadConfig consults — these may be
@@ -366,25 +365,6 @@ const config = loadConfig();
     expect(config.openrouter.apiKey).toBe('env-key');
   });
 
-  it('overrides browser headless from BROWSER_HEADLESS env var', () => {
-    process.env.BROWSER_HEADLESS = 'true';
-    const configPath = path.join(process.cwd(), 'config.yaml');
-    fs.writeFileSync(configPath, `
-reddit:
-  subreddits:
-    - test
-openrouter:
-  apiKey: key
-  imageAnalysisPrompt: analyze this
-  messageGenerationPrompt: write message
-browser:
-  headless: false
-`);
-
-const config = loadConfig();
-    expect(config.browser.headless).toBe(true);
-  });
-
   it('rejects config with invalid values', () => {
     const configPath = path.join(process.cwd(), 'config.yaml');
     fs.writeFileSync(configPath, `