pulse: 1× local vs 3× remote, local cards don't trigger all-tab dot

Locally-created cards (editor, quick capture, duplicate) now get a
single subtle pulse instead of the triple-pulse reserved for relay-
synced cards. Local cards also never trigger the unread dot on the
fixed "all" bucket tab — the user just created them, there's nothing
"unseen" about their own work.

state.js: new state.recentlyCreatedIds Set. Populated by editor.js
doSave (POST), app.js quick capture (POST), and context-menu.js
duplicate (both date-rename and copy paths).

board.js renderBoard diff: new card ids are checked against
recentlyCreatedIds at diff time. Local ids go into a renderBoard-
local newLocalIds set (never into state.unseenCardIds). Remote ids
go into unseenCardIds as before.

board.js drain block (end of renderBoard): two-phase drain.
Phase 1: newLocalIds → pulseCards(local, 'card-pulse-local') with
900ms timeout, works in any bucket. Consumed recentlyCreatedIds
entries are deleted.
Phase 2: remaining unseenCardIds (remote only) → pulseCards(remote,
'card-pulse-new') with 2400ms timeout, only on activeBucket=all.

decorateAllUnreadDot() reads only state.unseenCardIds which now
contains exclusively remote ids → no dot from local card creation.

style.css: new .card-pulse-local class — same @keyframes but
animation-iteration-count:1. Anim-fast/slow overrides added.

chore: bump version to 0.9.16

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

public/js/modules/state.js

@@ -37,6 +37,11 @@ export const state = {
     // accent pulse on the cards themselves once the user looks at them.
     // Updated by board.js renderBoard() — see the diff there.
     unseenCardIds: new Set(),
+    // Ids of cards the user just created locally (editor save, quick
+    // capture, duplicate, undo-recreate). These get a single-pulse (1x)
+    // instead of the triple-pulse (3x) that relay-synced cards get.
+    // Consumed by renderBoard's diff — once used, the id is removed.
+    recentlyCreatedIds: new Set(),
 
     // Detail / editor
     editingId: null,