web: rework landing page around trust, and shorten the feature wall

Reorders the page so the security story lands after the visitor has seen
what the agent actually does, and trims the parts that were competing for
attention.

- Move the trust rail out of the hero and into the demo section, directly
  under the video. "Will it click things without asking me" is the live
  question once you have watched the agent act, not before.
- Render all four safeguards instead of three. hero.trust.b4 was already
  translated into all 22 locales but never displayed. Widens the card to
  940px and steps 4 -> 2 -> 1 columns down the breakpoints.
- Collapse the twelve feature cards to six behind a Show all features
  toggle. The markup ships expanded so crawlers and no-JS visitors still
  get the full grid; JS collapses it on load.
- State the comparison result instead of hedging it. The side-by-side test
  is favorable, so the copy says so, and the weak "Ask / Act modes:
  Similar" row is dropped along with its now-dead locale keys.

Two bug fixes found along the way:

- Restore a working language switcher without JS. The flag picker is
  JS-only and the native select it replaced was display:none, so scripting
  failures left no way to change language at all. A noscript stylesheet now
  hides the picker and reveals real locale links in the footer.
- Fix the trust bullet checkmarks in RTL locales. The badge was placed with
  inset-inline-start but the text gutter used physical padding-left, so the
  two collided in Arabic, Hebrew, and Farsi.

Tests updated to assert the new ordering, the fourth safeguard, the
direction-aware gutter, and the new comparison copy.

Author: esokullu

test/run.js

@@ -0,0 +1,21 @@
+The MIT License (MIT)
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+Copyright (c) 2013 Panayiotis Lipiridis
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