book.html: let a book be named, because a filename is not a title

Uploading "Memory Road interior 12-28.pdf" produced a book, a run and a
storyboard all headed "Memory Road interior 12-28". The title is derived from
the filename because that is the only thing an upload carries, and publishers
name files after print runs.

Guessing harder is the wrong fix - stripping "interior 12-28" would be a rule
that works on one file. Letting the author type the title takes eight lines and
is right for every file. The author field goes in at the same time; it costs
nothing and a trailer should know whose book it is.

book.html

@@ -25,6 +25,9 @@
         border:1px dashed var(--line);border-radius:12px;padding:18px}
   .pick.on{border-color:var(--accent);border-style:solid}
   .pick .or{color:var(--muted);font-size:13px}
+  .rename{display:flex;gap:8px;flex-wrap:wrap;margin-top:8px}
+  .rename input{font:inherit;font-size:13px;background:transparent;color:var(--ink);
+                border:1px solid var(--line);border-radius:8px;padding:6px 9px}
   .writers{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px}
   .wr{display:flex;gap:8px;align-items:center;border:1px solid var(--line);
       border-radius:10px;padding:9px 12px;cursor:pointer}
@@ -125,7 +128,7 @@ function readFileB64(file) {
   if (!email) return;
   navBar("trailer");
 
-  var BOOKS = [], PICKED = null, WRITERS = [], CHOSEN = {}, LEAD = "";
+  var BOOKS = [], PICKED = null, WRITERS = [], CHOSEN = {}, LEAD = "", EDIT = null;
   var pollTimer = null;
 
   // ---------------------------------------------------------------- books
@@ -141,17 +144,30 @@ function readFileB64(file) {
     } else {
       sub = "reading the manuscript…";
     }
+    // A filename is not a title. Publishers name files after print runs, so
+    // the derived title is a starting point the author can correct.
+    var rename = EDIT === b.id
+      ? '<div class="rename">'
+        + '<input id="rt" value="' + esc(b.title || "") + '" placeholder="Title">'
+        + '<input id="ra" value="' + esc(b.author || "") + '" placeholder="Author">'
+        + '<button type="button" class="btn" data-save="' + esc(b.id) + '">Save</button>'
+        + '<button type="button" class="btn" data-cancel="1">Cancel</button>'
+        + '</div>'
+      : '';
     return '<div class="bk" data-id="' + esc(b.id) + '">'
       + '<div class="meta">'
       +   '<h3>' + esc(b.title || "Untitled") + '</h3>'
-      +   '<div class="sub">' + sub + (b.created_at ? ' &middot; ' + esc(when(b.created_at)) : '') + '</div>'
+      +   '<div class="sub">' + (b.author ? esc(b.author) + ' &middot; ' : '') + sub
+      +   (b.created_at ? ' &middot; ' + esc(when(b.created_at)) : '') + '</div>'
       +   (st === "failed" && b.note ? '<div class="why">' + esc(b.note) + '</div>' : '')
+      +   rename
       + '</div>'
       + '<div class="acts">'
       +   '<span class="state ' + esc(st) + '">' + esc(st) + '</span>'
       +   (st === "ready"
             ? '<button type="button" class="btn" data-pick="' + esc(b.id) + '">'
               + (PICKED === b.id ? "Selected" : "Use this book") + '</button>'
+              + '<button type="button" class="btn" data-edit="' + esc(b.id) + '">Rename</button>'
             : '')
       +   '<button type="button" class="btn" data-del="' + esc(b.id) + '">Remove</button>'
       + '</div></div>';
@@ -179,13 +195,26 @@ function readFileB64(file) {
   }
 
   document.getElementById("books").addEventListener("click", async function (e) {
-    var pick = e.target.getAttribute("data-pick");
-    var del = e.target.getAttribute("data-del");
+    var t = e.target;
+    var pick = t.getAttribute("data-pick"), del = t.getAttribute("data-del");
+    var edit = t.getAttribute("data-edit"), save = t.getAttribute("data-save");
+    if (t.getAttribute("data-cancel")) { EDIT = null; paintBooks(); return; }
+    if (edit) { EDIT = edit; paintBooks(); return; }
+    if (save) {
+      var title = document.getElementById("rt").value.trim();
+      var author = document.getElementById("ra").value.trim();
+      if (!title) { showMsg("msg", "A book needs a title."); return; }
+      t.disabled = true;
+      var u = await api("update_book", { book_id: save, title: title, author: author });
+      if (!u.ok) { showMsg("msg", u.error || "That did not save."); t.disabled = false; return; }
+      hideMsg("msg"); EDIT = null; loadBooks();
+      return;
+    }
     if (pick) { PICKED = pick; hideMsg("msg"); paintBooks(); paintQuote(); return; }
     if (del) {
-      e.target.disabled = true;
+      t.disabled = true;
       var r = await api("delete_book", { book_id: del });
-      if (!r.ok) { showMsg("msg", r.error || "Could not remove that."); e.target.disabled = false; return; }
+      if (!r.ok) { showMsg("msg", r.error || "Could not remove that."); t.disabled = false; return; }
       if (PICKED === del) PICKED = null;
       loadBooks();
     }
@@ -227,6 +256,9 @@ function readFileB64(file) {
     resetPick();
     if (!r.ok) { showMsg("msg", r.error || "That upload did not go through."); return; }
     PICKED = null;
+    // Straight into rename: the derived title is a guess and this is the one
+    // moment the author is looking at it.
+    EDIT = r.book && r.book.id;
     loadBooks();
   }
 
@@ -275,7 +307,7 @@ function readFileB64(file) {
     // Writing is the cheap half. Drawing the storyboards is priced separately,
     // per writer, once you have read the scripts.
     el.innerHTML = n + " writer" + (n > 1 ? "s" : "")
-      + " &middot; about $" + (n * 0.6).toFixed(2) + " to write"
+      + " &middot; about $" + (n * 0.85).toFixed(2) + " to write a full-length novel"
       + " &middot; storyboards are priced separately once you have read them";
   }