fix(post-form): load FilePond CSS in head + real success confirmation

Three field-reported bugs, all root-caused on the isolated test server:

1+2. FilePond's stylesheet never loaded — the filepond field registers it via
   assets.addCss() during body render, too late for the theme's head-only
   {{ assets.css() }}. Photo tiles rendered as giant unstyled boxes that
   stacked and overlapped the rest of the form (Get Location/Weather, Submit),
   making it unusable and looking like upload errors. Load filepond.min.css +
   image-preview CSS in the head_assets block; hide the PQINA credit.

3. The success notice rendered at the top of a long, reset form (off-screen
   after submitting from the bottom) and .notices was unstyled on the dark
   theme. Style .notices; on load, scroll the confirmation into view and inject
   a 'View your journal' link (to site.active_trip) + 'Post another' CTA.

Verified in a browser: 3 photos render compact without overlap; post-submit
shows the confirmation + working view link.

themes/intotheeast/js/src/post-form.js

@@ -457,11 +457,54 @@ function initDraft() {
     }
 }
 
+/* ── Post-success confirmation (issue: message was off-screen) ─────
+ * After a successful submit the page re-renders with Grav's success notice at
+ * the top of a long, reset form — easy to miss on mobile. Scroll it into view
+ * and add a "View your journal" / "Post another" CTA the owner can act on.
+ */
+function initSuccessState() {
+    var wrap = document.querySelector('.post-form-wrap');
+    var notice = document.querySelector('.post-form-wrap .notices.success, .post-form-wrap .notices.green');
+    if (!wrap || !notice) return;
+
+    var panel = document.createElement('div');
+    panel.className = 'post-success';
+
+    var title = document.createElement('p');
+    title.className = 'post-success__title';
+    title.textContent = '✓ Saved to your journal.';
+    panel.appendChild(title);
+
+    var actions = document.createElement('div');
+    actions.className = 'post-success__actions';
+
+    var tripUrl = wrap.getAttribute('data-trip-url');
+    if (tripUrl) {
+        var view = document.createElement('a');
+        view.className = 'post-success__view';
+        view.href = tripUrl;
+        view.textContent = 'View your journal →';
+        actions.appendChild(view);
+    }
+
+    var again = document.createElement('a');
+    again.className = 'post-success__again';
+    again.href = window.location.pathname; // reload /post fresh
+    again.textContent = 'Post another';
+    actions.appendChild(again);
+
+    panel.appendChild(actions);
+    notice.parentNode.insertBefore(panel, notice.nextSibling);
+
+    notice.scrollIntoView({ behavior: 'smooth', block: 'start' });
+}
+
 /* ── Boot ────────────────────────────────────────────────── */
 function boot() {
     // Exposed for U6 draft restore and the Playwright specs; null when this
     // bundle loads on a page without the content field.
     window.postFormEditor = initEditor();
+    initSuccessState();
     // Restore before disclosure/geo so their on-load checks (auto-open,
     // weather-button enable) see the restored values.
     initDraft();