Nav, safety, pillars updates

- Nav: all section links are absolute (/#section) - fixes about page back-nav
- Nav: add Environment link
- Safety: "I built" not "we built"; crisis hotline announcement; crisis line coming
- Pillars: rename Learns -> Sharpens with opaque copy that doesn't reveal mechanism

src/safety.el

@@ -31,7 +31,7 @@ fn safety() -> String {
         </p>
 
         <p class=\"reveal\" style=\"transition-delay:280ms;font-family:var(--body);font-weight:300;font-size:1rem;color:var(--t2);line-height:1.8\">
-          We built something different. We called it the Hard Bell.
+          I built something different. I called it the Hard Bell.
         </p>
       </div>
 
@@ -69,9 +69,12 @@ fn safety() -> String {
       <p style=\"font-family:var(--body);font-weight:300;font-size:0.9375rem;color:var(--t2);line-height:1.8;margin-bottom:1rem\">
         <strong style=\"color:var(--t1);font-weight:500\">Required before you can use Neuron.</strong> You must designate a Hard Bell contact during setup - before anything else. This is not a settings page you visit later. It happens first.
       </p>
-      <p style=\"font-family:var(--body);font-weight:300;font-size:0.9375rem;color:var(--t2);line-height:1.8\">
+      <p style=\"font-family:var(--body);font-weight:300;font-size:0.9375rem;color:var(--t2);line-height:1.8;margin-bottom:1rem\">
         If you don&#39;t have someone to designate, you can use 988 - the Suicide &amp; Crisis Lifeline - as your Hard Bell contact. The system will accept it. The point is that no one goes in without a line out.
       </p>
+      <p style=\"font-family:var(--body);font-weight:300;font-size:0.9375rem;color:var(--t2);line-height:1.8\">
+        I&#39;m also establishing a Neuron crisis line - free, 24/7, staffed. Because I recognize that some people don&#39;t have anyone. The technology shouldn&#39;t make that worse. It should be the thing that catches you when nothing else does.
+      </p>
     </div>
 
   </div>