Fix follower links, HTMX follow/unfollow, update shared submodule

- Follower profile links now go to https://domain/@username (web profile)
  instead of the AP actor URL which 404s
- Follow Back/Unfollow buttons update via HTMX without full page refresh
- Update shared submodule to decoupling branch with new protocol methods

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

bp/social/routes.py

@@ -157,6 +157,8 @@ def register(url_prefix="/social"):
             await services.federation.send_follow(
                 g.s, actor.preferred_username, remote_actor_url,
             )
+        if request.headers.get("HX-Request"):
+            return await _actor_card_response(actor, remote_actor_url, is_followed=True)
         return redirect(request.referrer or url_for("social.search"))
 
     @bp.post("/unfollow")
@@ -168,8 +170,34 @@ def register(url_prefix="/social"):
             await services.federation.unfollow(
                 g.s, actor.preferred_username, remote_actor_url,
             )
+        if request.headers.get("HX-Request"):
+            return await _actor_card_response(actor, remote_actor_url, is_followed=False)
         return redirect(request.referrer or url_for("social.search"))
 
+    async def _actor_card_response(actor, remote_actor_url, is_followed):
+        """Re-render a single actor card after follow/unfollow via HTMX."""
+        remote_dto = await services.federation.get_or_fetch_remote_actor(
+            g.s, remote_actor_url,
+        )
+        if not remote_dto:
+            return Response("", status=200)
+        followed_urls = {remote_actor_url} if is_followed else set()
+        # Detect list context from referer
+        referer = request.referrer or ""
+        if "/followers" in referer:
+            list_type = "followers"
+        else:
+            list_type = "following"
+        return await render_template(
+            "federation/_actor_list_items.html",
+            actors=[remote_dto],
+            total=0,
+            page=1,
+            list_type=list_type,
+            followed_urls=followed_urls,
+            actor=actor,
+        )
+
     # -- Interactions ---------------------------------------------------------
 
     @bp.post("/like")

templates/federation/_actor_list_items.html

@@ -1,5 +1,6 @@
 {% for a in actors %}
-  <article class="bg-white rounded-lg shadow-sm border border-stone-200 p-4 mb-3 flex items-center gap-4">
+  <article class="bg-white rounded-lg shadow-sm border border-stone-200 p-4 mb-3 flex items-center gap-4"
+           id="actor-{{ a.actor_url | replace('/', '_') | replace(':', '_') }}">
     {% if a.icon_url %}
       <img src="{{ a.icon_url }}" alt="" class="w-12 h-12 rounded-full">
     {% else %}
@@ -14,7 +15,7 @@
           {{ a.display_name or a.preferred_username }}
         </a>
       {% else %}
-        <a href="{{ a.actor_url }}" target="_blank" rel="noopener" class="font-semibold text-stone-900 hover:underline">
+        <a href="https://{{ a.domain }}/@{{ a.preferred_username }}" target="_blank" rel="noopener" class="font-semibold text-stone-900 hover:underline">
           {{ a.display_name or a.preferred_username }}
         </a>
       {% endif %}
@@ -26,17 +27,11 @@
 
     {% if actor %}
       <div class="flex-shrink-0">
-        {% if list_type == "following" %}
-          <form method="post" action="{{ url_for('social.unfollow') }}">
-            <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
-            <input type="hidden" name="actor_url" value="{{ a.actor_url }}">
-            <button type="submit" class="text-sm border border-stone-300 rounded px-3 py-1 hover:bg-stone-100">
-              Unfollow
-            </button>
-          </form>
-        {% elif list_type == "followers" %}
-          {% if a.actor_url in followed_urls %}
-            <form method="post" action="{{ url_for('social.unfollow') }}">
+        {% if list_type == "following" or a.actor_url in (followed_urls or set()) %}
+          <form method="post" action="{{ url_for('social.unfollow') }}"
+                hx-post="{{ url_for('social.unfollow') }}"
+                hx-target="closest article"
+                hx-swap="outerHTML">
             <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
             <input type="hidden" name="actor_url" value="{{ a.actor_url }}">
             <button type="submit" class="text-sm border border-stone-300 rounded px-3 py-1 hover:bg-stone-100">
@@ -44,7 +39,10 @@
             </button>
           </form>
         {% else %}
-            <form method="post" action="{{ url_for('social.follow') }}">
+          <form method="post" action="{{ url_for('social.follow') }}"
+                hx-post="{{ url_for('social.follow') }}"
+                hx-target="closest article"
+                hx-swap="outerHTML">
             <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
             <input type="hidden" name="actor_url" value="{{ a.actor_url }}">
             <button type="submit" class="text-sm bg-stone-800 text-white rounded px-3 py-1 hover:bg-stone-700">
@@ -52,7 +50,6 @@
             </button>
           </form>
         {% endif %}
-        {% endif %}
       </div>
     {% endif %}
   </article>