delete animation, no #inbox tag, preset delete lock on builtins

Card delete animation (public/css/style.css, public/js/modules/board.js):
* @keyframes card-remove: opacity 1→0 + scale(1)→0.85 + translateY(8px),
  250ms ease-in forwards. .card-removing class with pointer-events:none.
* New exported animateCardRemoval(ids) in board.js: adds .card-removing
  to each matching board-card element, resolves after 260ms so the
  caller can await before the API DELETE + _reloadAll.
* Wired into all three delete paths:
  - context-menu.js group delete: animates parent + all children
  - context-menu.js single delete: same path (allCards has one entry)
  - app.js Del/Backspace shortcut: animates all selected cards

Quick capture no #inbox (public/js/app.js):
* Removed the line that auto-injected #inbox into the body of every
  quick-captured card. Cards now land tag-free in the active bucket
  (or unsorted).

Settings: preset delete lock (public/js/modules/theme.js):
* refreshPresetSelect() now disables the delete button (disabled attr
  + opacity 0.35 + cursor not-allowed) when a builtin: preset is
  selected. Re-enabled when a user: preset is selected. The click
  handler already had a startsWith('user:') guard but the button
  wasn't visually locked.

chore: bump version to 0.9.17

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

public/css/style.css

@@ -474,6 +474,14 @@ body::after {
     transform: rotate(45deg); margin-top: -2px;
 }
 .card-dragging { opacity: 0.15; transform: scale(0.95); }
+@keyframes card-remove {
+    0%   { opacity:1; transform:scale(1); }
+    100% { opacity:0; transform:scale(0.85) translateY(8px); }
+}
+.card-removing {
+    animation: card-remove 0.25s ease-in forwards;
+    pointer-events: none;
+}
 .box-select {
     position: absolute; border: 1px solid var(--t-accent); background: rgba(56, 189, 248, 0.08);
     pointer-events: none; z-index: 10;