Add Progress Log tab: chronological record of cross-track accomplishments

New top-level sidebar tab, distinct from Tasks' "what's currently open"
framing. Entries (PROGRESS_LOG_DATA) are curated by the cross-session
coordinator and relayed here, not written directly by other tracks --
same single-writer discipline already used for the Tasks tab. Empty shell
for now; first entries (PE companies closure, Prospect Scout build, CRM
Research WP1 closure, SPIE/GaN checks) coming from the coordinator next.

index.html

@@ -789,6 +789,7 @@
     <div class="nav-group">
       <button class="sidebar-nav-btn active" data-tab="team">Team</button>
       <button class="sidebar-nav-btn" data-tab="tasks">Tasks</button>
+      <button class="sidebar-nav-btn" data-tab="progress-log">Progress Log</button>
       <button class="sidebar-nav-btn" data-tab="address-book">Directory</button>
       <button class="sidebar-nav-btn" data-tab="marketing">Marketing</button>
       <button class="sidebar-nav-btn" data-tab="sales">Sales</button>
@@ -856,6 +857,10 @@
       </div>
     </div>
 
+    <div id="tab-progress-log" class="tab-content">
+      <div id="progress-log-list"></div>
+    </div>
+
     <div id="tab-address-book" class="tab-content">
       <div class="ab-toolbar">
         <div class="ab-view-toggle">
@@ -4800,6 +4805,7 @@
   var HERO = {
     "team":          ["Team", "Who's on marketing/sales and their roles."],
     "tasks":         ["Tasks", "Everything to accomplish, look at, and get done, across every track."],
+    "progress-log":  ["Progress Log", "A chronological record of what's been accomplished across every track — source material for reports to Peter."],
     "address-book":  ["Directory", "One outreach board, fed by every branch — Marketing Intelligence, LinkedIn, and the boss's Outreach targets."],
     "marketing":     ["Marketing", ""],
     "sales":         ["Sales", ""],
@@ -6488,6 +6494,30 @@
 
   renderTasksBoard();
 
+  /* ---- Progress Log: chronological narrative record of accomplishments across every
+          track, curated by the cross-session coordinator (not written directly by other
+          tracks) -- source material for Mckinley's reports to Peter. Newest entry first. */
+  var PROGRESS_LOG_DATA = [];
+
+  function renderProgressLog() {
+    var list = document.getElementById("progress-log-list");
+    if (!PROGRESS_LOG_DATA.length) {
+      list.innerHTML = "<div class=\"ab-outreach-empty\">No entries yet.</div>";
+      return;
+    }
+    list.innerHTML = PROGRESS_LOG_DATA.map(function (entry) {
+      return (
+        "<div class=\"card\">" +
+          "<div style=\"font-size:0.78rem; font-weight:700; color:#6b7a8d; text-transform:uppercase; letter-spacing:0.04em; margin-bottom:6px;\">" + tasksEsc(entry.date) + "</div>" +
+          "<h3 style=\"margin:0 0 8px;\">" + tasksEsc(entry.title) + "</h3>" +
+          "<p class=\"narrative\" style=\"margin:0;\">" + tasksEsc(entry.body) + "</p>" +
+        "</div>"
+      );
+    }).join("");
+  }
+
+  renderProgressLog();
+
   /* ---- Opportunities module loader ----
      Fetches its markup, injects it into the empty tab container, then loads its
      script as a normal <script src> (so it runs only once the DOM it needs exists). */