Per-project access control + UI/feedback/admin refinements

Access control:
- project_members table; non-admins only see/operate on assigned
  projects (enforced across projects, SOPs, work packages — 403 else),
  admins bypass. Creating a project auto-grants its creator access.
- Admin API to get/set a user's project assignments, plus a checkbox
  assignment dialog in the Admin Console user list.

UI / workflow:
- Login page: drop the "Prime Controls" wordmark next to the logo.
- SOP tool: remove emoji icons from buttons and nav tabs.
- Rename "Step Comments" to "Feedback"; the author auto-populates
  (read-only) from the signed-in user.
- Move usage-log viewing to the Admin Console; add an admin card that
  lists all feedback/comments (who, what, page + step, when).
- Sample project name -> "Micron FMCS Install (sample)".

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

html/admin.html

@@ -103,6 +103,29 @@
     <div id="users-create-msg" class="note"></div>
   </div>
 
+  <!-- ALL FEEDBACK / COMMENTS -->
+  <div class="card">
+    <h2>All feedback &amp; comments</h2>
+    <div class="sub" style="margin-bottom:10px">Every comment submitted across the suite — who wrote it, what they said, and where they were (page &amp; step) when they commented.</div>
+    <div class="row">
+      <button onclick="loadComments()">Refresh comments</button>
+      <select id="cmt-filter" onchange="renderComments()"><option value="">All sources</option></select>
+      <input id="cmt-search" placeholder="Search text / author…" oninput="renderComments()" style="flex:1;min-width:160px;padding:8px 10px;font:inherit;font-size:13px;border:1px solid var(--border-strong);border-radius:6px;">
+    </div>
+    <div id="comments-admin" class="note" style="margin-top:12px">Click refresh to load.</div>
+  </div>
+
+  <!-- USAGE LOGS -->
+  <div class="card">
+    <h2>Usage logs</h2>
+    <div class="sub" style="margin-bottom:10px">Engagement recorded by the suite — sessions, step views, and actions. Note: stored locally per browser, so this reflects activity on <strong>this</strong> machine.</div>
+    <div class="row">
+      <button onclick="loadUsage()">Refresh</button>
+      <button onclick="downloadUsage()">Download JSON</button>
+    </div>
+    <div id="usage-admin" class="note" style="margin-top:12px">Click refresh to load.</div>
+  </div>
+
   <!-- DB SNAPSHOT -->
   <div class="card">
     <h2>Database snapshot</h2>