docs: annotate verified vs unverified selectors, drop redundant clicks

Addresses reviewer's minor findings on the prior fix commit: makes the
screenshot-verified/unverified boundary explicit in code comments so it
travels with the file rather than living only in commit messages, and
removes redundant .click() calls before .fill() (fill() already focuses).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

sidecars/reddit-post/tests/reddit-post.spec.js

@@ -52,17 +52,21 @@ test.describe('reddit post', () => {
         throw new Error(outcome.error);
       }
 
+      // Screenshot-verified against the live Reddit login page: cookie
+      // dialog button text and the "Log In" submit button's accessible
+      // name are both confirmed correct.
       const rejectCookies = page.getByRole('button', { name: 'Reject Optional Cookies' });
       if (await rejectCookies.isVisible({ timeout: 5_000 }).catch(() => false)) {
         await rejectCookies.click();
       }
 
+      // Not individually screenshot-verified (only confirmed to resolve
+      // as far as the network block allowed) — watch these first if
+      // login fails on a real, unblocked network.
       const usernameField = page.getByLabel(/email or username/i);
-      await usernameField.click();
       await usernameField.fill(/** @type {string} */ (username));
 
       const passwordField = page.getByLabel(/^password/i);
-      await passwordField.click();
       await passwordField.fill(/** @type {string} */ (password));
 
       await page.getByRole('button', { name: 'Log In' }).click();
@@ -82,6 +86,12 @@ test.describe('reddit post', () => {
         throw new Error(outcome.error);
       }
 
+      // UNVERIFIED: a network block in the dev sandbox prevented ever
+      // reaching this point in a live run, so none of the selectors below
+      // (text-type tab, title field, body field, submit button) have been
+      // confirmed against the real submit page. If posting fails here on
+      // a real, unblocked network, inspect the live page first — e.g. via
+      // `npx playwright codegen https://www.reddit.com/r/test/submit`.
       await page.goto(`https://www.reddit.com/r/${subreddit}/submit`);
 
       const textTab = page.getByRole('button', { name: /^Text$/i }).first();