Descriptions are inline markdown; Feature.link withdrawn

Alternative and feature descriptions render links, emphasis and code
(pulldown-cmark, html feature only). Block structure flattens to one
paragraph, raw HTML is dropped, link targets are limited to https,
mailto and site-relative paths. A link belongs in the prose, so the
title-link field shipped in 0.3.7 goes before anyone uses it.

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

src/app.rs

@@ -9,7 +9,7 @@ use serde::{Deserialize, Serialize};
 
 use crate::answers::{Answer, SelfTransitionAnswer, TransitionAnswers, TransitionItem};
 use crate::auth::{current_user, User};
-use crate::content::{is_qualified, Alternative, Question, Responsible, SiteConfig, Transition};
+use crate::content::{is_qualified, render_inline_markdown, Alternative, Question, Responsible, SiteConfig, Transition};
 use crate::resource::{get_requirement_binding, get_requirement_options, get_resource};
 
 /// The visible site name/wordmark - "portal" is just this codebase's
@@ -680,7 +680,7 @@ fn AlternativeCard(
         return view! {
             <section class="alt-card">
                 <h2>{alternative.name.clone()}</h2>
-                <p class="alt-description">{alternative.description.clone()}</p>
+                <p class="alt-description" inner_html=render_inline_markdown(&alternative.description)></p>
                 {move || {
                     let question_id_for_action = question_id_for_action.clone();
                     let alt_name_for_action = alt_name_for_action.clone();
@@ -902,7 +902,7 @@ fn AlternativeCard(
         <section class="alt-card">
             <AltImages images=alternative.images.clone() />
             <h2>{alternative.name.clone()}</h2>
-            <p class="alt-description">{alternative.description.clone()}</p>
+            <p class="alt-description" inner_html=render_inline_markdown(&alternative.description)></p>
             <div class="features">
                 <For
                     each={
@@ -945,22 +945,13 @@ fn AlternativeCard(
                                         let name = feature.name.clone();
                                         move || !name.is_empty()
                                     }>
-                                        <h3>
-                                            {match feature.link.clone() {
-                                                Some(href) => view! {
-                                                    <a href=href target="_blank" rel="noopener noreferrer">
-                                                        {feature.name.clone()}
-                                                    </a>
-                                                }.into_any(),
-                                                None => feature.name.clone().into_any(),
-                                            }}
-                                        </h3>
+                                        <h3>{feature.name.clone()}</h3>
                                     </Show>
                                     <Show when={
                                         let description = feature.description.clone();
                                         move || !description.is_empty()
                                     }>
-                                        <p>{feature.description.clone()}</p>
+                                        <p inner_html=render_inline_markdown(&feature.description)></p>
                                     </Show>
                                     {resource.map(|spec| {
                                         view! {