Land CSOC-WP-0006 PageOps: member space/page CRUD, copy, transfer

Thin CONTENT_ROOT content plane (ADR-0003/0004) with space visual field,
product UI for Title/Abstract/Visual, page list sidebar, and tests. Update
capability model and smoke checklist; mark WP-0006 finished.

coulomb_social/templates/spaces/form.html

@@ -0,0 +1,74 @@
+{% extends "base.html" %}
+{% block title %}{{ form_title }} — {{ site_name }}{% endblock %}
+{% block extra_head %}
+<style>
+  textarea {
+    width: 100%;
+    padding: 0.5rem 0.75rem;
+    margin-top: 0.25rem;
+    border: 1px solid #ccc;
+    border-radius: 6px;
+    font: inherit;
+    min-height: 5rem;
+  }
+  .form-actions {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 0.75rem;
+    margin-top: 1.25rem;
+    align-items: center;
+  }
+  .danger-zone {
+    margin-top: 2rem;
+    padding-top: 1.25rem;
+    border-top: 1px solid #e5e5e5;
+  }
+</style>
+{% endblock %}
+{% block content %}
+  <p class="muted" style="margin:0 0 0.5rem;">
+    <a href="{% if space %}{% url 'spaces:detail' space.slug %}{% else %}{% url 'core:app_home' %}{% endif %}">← Back</a>
+  </p>
+  <h1>{{ form_title }}</h1>
+  <p class="muted">Title and Abstract describe the space; Visual is a cover path under the space tree (e.g. <code>assets/cover.jpg</code>).</p>
+
+  <form method="post" class="card" style="margin-top:1rem;">
+    {% csrf_token %}
+    <label for="id_title">Title</label>
+    <input type="text" id="id_title" name="title" required maxlength="255"
+           value="{% if space %}{{ space.title }}{% endif %}" autocomplete="off">
+
+    <label for="id_slug">Slug {% if space %}<span class="muted">(fixed)</span>{% else %}<span class="muted">(optional — from title)</span>{% endif %}</label>
+    <input type="text" id="id_slug" name="slug" maxlength="80"
+           value="{% if space %}{{ space.slug }}{% endif %}"
+           {% if space %}readonly{% endif %}
+           pattern="[a-z0-9]+(?:-[a-z0-9]+)*"
+           placeholder="my-space" autocomplete="off">
+
+    <label for="id_abstractor">Abstract</label>
+    <textarea id="id_abstractor" name="abstractor" rows="3"
+              placeholder="Short description of this space">{% if space %}{{ space.description }}{% endif %}</textarea>
+
+    <label for="id_visual">Visual</label>
+    <input type="text" id="id_visual" name="visual" maxlength="512"
+           value="{% if space %}{{ space.visual }}{% endif %}"
+           placeholder="assets/cover.jpg" autocomplete="off">
+
+    <div class="form-actions">
+      <button type="submit" class="btn">{{ submit_label }}</button>
+      <a class="btn secondary" href="{% if space %}{% url 'spaces:detail' space.slug %}{% else %}{% url 'core:app_home' %}{% endif %}">Cancel</a>
+    </div>
+  </form>
+
+  {% if space %}
+    <div class="danger-zone">
+      <h2 style="margin-top:0;font-size:1.1rem;">Archive space</h2>
+      <p class="muted">Hides the space from the list. Content tree is soft-archived on disk.</p>
+      <form method="post" action="{% url 'spaces:archive' space.slug %}"
+            onsubmit="return confirm('Archive this space?');">
+        {% csrf_token %}
+        <button type="submit" class="btn secondary small">Archive space</button>
+      </form>
+    </div>
+  {% endif %}
+{% endblock %}