feat: support custom task recurrence

frontend/src/style.css

@@ -7,7 +7,7 @@
 main{min-width:0;padding:27px 34px 50px;overflow:auto;background:linear-gradient(rgba(255,253,248,.92),rgba(255,253,248,.92)),repeating-linear-gradient(0deg,transparent,transparent 31px,#eee3d2 32px)}.topbar{display:flex;align-items:center;gap:14px}.topbar>div{flex:1}.topbar p{margin:0;color:var(--muted);font-size:12px}.topbar h1{font-size:27px;margin:3px 0 21px;letter-spacing:-.03em}.topbar.today-topbar h1{margin-bottom:4px}.today-board{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin:18px 0 8px}.today-stat{background:#fff;border:1px solid rgba(231,221,204,.86);border-radius:14px;padding:12px 14px;box-shadow:0 3px 14px rgba(81,61,38,.04);display:grid;gap:3px}.today-stat strong{font-size:23px;line-height:1;color:#3c372f}.today-stat span{font-size:12px;color:var(--muted)}.today-stat.muted strong{color:#8b8275}.search{margin-bottom:18px;display:flex;align-items:center;gap:8px;width:min(260px,36%);padding:8px 10px;background:#faf7f0;border:1px solid var(--line);border-radius:9px;color:var(--muted)}.search input{min-width:0;width:100%;border:0;outline:0;background:transparent}.search kbd{font-size:10px;white-space:nowrap;border:1px solid var(--line);padding:2px 4px;border-radius:4px}.list-toolbar{height:42px;display:flex;align-items:center;gap:14px;color:var(--muted);font-size:12px}.list-toolbar label{margin-right:auto}.link{border:0;background:transparent;color:var(--accent);padding:3px;display:inline-flex;gap:3px;align-items:center}.link svg{width:14px}.task-list{transition:opacity .2s}.task-list.loading{opacity:.45}.task-row{border-left:0;--swipe-x:0px;min-height:53px;display:flex;align-items:center;gap:10px;border-bottom:1px solid var(--line);padding:4px 8px;transition:background .15s,transform .18s ease;position:relative;overflow:hidden;isolation:isolate}.task-row.swipeable{touch-action:pan-y;transform:translate(var(--swipe-x),var(--reorder-y,0px))}.task-row.swipeable:not([style*="0px"]){transition:none}.task-row:hover,.task-row.selected{background:rgba(250,240,229,.75)}.task-row:hover:not(.reordering){transform:translate(calc(var(--swipe-x) + 2px),var(--reorder-y,0px))}.check{width:19px;height:19px;flex:0 0 19px;border:1.6px solid #c6baa8;background:#fff;border-radius:5px;padding:0;display:grid;place-items:center}.check svg{width:13px}.task-check{width:44px;height:44px;flex:0 0 44px;border:0;background:transparent;padding:0;display:grid;place-items:center;border-radius:9px}.task-check-mark{width:19px;height:19px;border:1.6px solid #c6baa8;background:#fff;border-radius:50%;display:grid;place-items:center;transition:background .15s ease,border-color .15s ease,color .15s ease,transform .15s ease}.task-check-mark svg{width:13px}.task-check:hover .task-check-mark{transform:scale(1.06);border-color:#9d8f7b}.task-check:focus-visible{outline:2px solid rgba(241,90,41,.32);outline-offset:1px}.task-check[aria-pressed="true"] .task-check-mark{background:#71856b;border-color:#71856b;color:#fff}.task-check-mark.p1{border-color:#4b93d1}.task-check-mark.p2{border-color:#d79b25}.task-check-mark.p3{border-color:#dc4b30}.check.p1{border-color:#4b93d1}.check.p2{border-color:#d79b25}.check.p3{border-color:#dc4b30}.done .check{background:#afa595;color:white}.task-main{border:0;background:transparent;flex:1;min-width:0;text-align:left;padding:8px 0}.task-main strong{display:block;font-size:14px;font-weight:590;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.done .task-main strong{text-decoration:line-through;color:#9b9388}.meta{display:flex;align-items:center;gap:9px;color:#9b9286;font-size:11px;margin-top:3px}.meta span{display:flex;align-items:center;gap:3px}.meta svg{width:12px}.priority{font-size:10px;font-weight:750;padding:3px 6px;border-radius:5px}.priority.p1{color:#3f80ba;background:#e5f2fc}.priority.p2{color:#a56b05;background:#fff1cb}.priority.p3{color:#bd3827;background:#fde2dc}.icon,.ghost{min-width:44px;min-height:44px;border:0;background:transparent;display:grid;place-items:center;padding:5px;border-radius:6px}.mobile-only{display:none}.ghost{opacity:0;color:#9d9387}.task-row:hover .ghost{opacity:1}.ghost:hover{color:var(--danger);background:#fce7e2}.restore{display:flex;align-items:center;gap:5px;border:1px solid var(--line);background:#fff;border-radius:7px;padding:6px 8px;font-size:12px}.restore svg{width:14px}.subtask{padding-left:53px;min-height:42px;color:#6d655b}.subtask>svg{width:13px;color:#bbb0a2}.empty{min-height:300px;display:grid;place-items:center;align-content:center;gap:8px;color:#aaa094;text-align:center}.empty>svg{width:38px;height:38px;color:#d8cabb}.empty b{color:#6f675c}.empty span{font-size:13px}
 .drag-handle{width:34px;height:44px;flex:0 0 34px;display:grid;place-items:center;border:0;background:transparent;color:#b3a795;cursor:grab;touch-action:none;border-radius:8px}.drag-handle:active{cursor:grabbing}.drag-handle:disabled{opacity:.3;cursor:not-allowed}.drag-handle svg{width:17px;height:17px}.reordering{opacity:.78;z-index:4;box-shadow:0 12px 28px rgba(78,58,34,.18)!important;transition:none!important;pointer-events:none}.reorder-target{box-shadow:inset 0 2px 0 var(--accent)}
 .detail{min-width:0;border-left:1px solid var(--line);background:#faf7f0;overflow:auto}.detail-head{height:57px;display:flex;align-items:center;justify-content:space-between;padding:0 21px;border-bottom:1px solid var(--line);font-size:12px;font-weight:700;color:#80766a;text-transform:uppercase;letter-spacing:.08em}.paper{margin:22px;padding:28px 20px;min-height:180px;background:#fff;border:1px solid var(--line);border-radius:11px;box-shadow:0 4px 18px rgba(76,57,34,.05);display:grid;place-items:center;align-content:center;text-align:center;color:#8f8578}.paper svg{width:32px;height:32px;color:#ceb8a4;margin-bottom:12px}.paper b{color:#625b50}.paper p{font-size:13px;line-height:1.6}.today-summary{align-items:stretch;text-align:left;place-items:stretch}.today-summary>svg{justify-self:start}.today-summary-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;width:100%;margin-top:4px}.today-summary-grid span{display:grid;gap:2px;background:#faf7f0;border-radius:10px;padding:10px;text-align:center;color:var(--muted);font-size:11px}.today-summary-grid strong{font-size:18px;color:#4f473d}.detail-form{padding:19px;display:grid;gap:15px}.detail-title{display:flex;align-items:flex-start;gap:10px}.check.large{margin-top:8px;width:22px;height:22px;flex-basis:22px}.detail-title textarea{flex:1;border:0;background:transparent;resize:none;outline:none;font-size:19px;line-height:1.4;font-weight:700}.detail-form>label{grid-template-columns:80px 1fr;align-items:center}.detail-form>label input,.detail-form>label select{padding:8px}.field{display:grid;gap:7px}.field-label{display:flex;justify-content:space-between;align-items:center;font-size:12px;font-weight:700;color:#756d61}.hint{font-size:12px;color:#a49a8d}.markdown .field-label>span:last-child{display:flex;background:#eee7dc;padding:2px;border-radius:6px}.markdown .field-label button{border:0;background:transparent;padding:4px 8px;border-radius:5px;font-size:11px}.markdown .field-label button.active{background:#fff;color:var(--accent)}.markdown textarea{border:1px solid var(--line);background:#fff;border-radius:9px;padding:11px;resize:vertical;outline:none;font:13px/1.6 ui-monospace,SFMono-Regular,Menlo,monospace}.markdown-preview{min-height:160px;padding:10px 12px;background:#fff;border:1px solid var(--line);border-radius:9px;font-size:13px;line-height:1.65;overflow-wrap:anywhere}.markdown-preview h1{font-size:20px}.markdown-preview h2{font-size:16px}.markdown-preview p{margin:8px 0}.markdown-preview code{background:#f2ece2;padding:2px 4px;border-radius:4px}.markdown-preview a{color:var(--accent)}.subtasks{display:grid;gap:5px}.subtask-detail{display:flex;align-items:center;gap:8px;border:0;background:#fff;padding:8px;border-radius:7px;text-align:left}.subtask-detail .check{pointer-events:none}.strike{text-decoration:line-through;color:var(--muted)}.detail-actions{display:flex;justify-content:space-between;align-items:center;padding-top:10px;border-top:1px solid var(--line)}.secondary{border:1px solid var(--line);background:#fff;padding:8px 11px;border-radius:8px;font-weight:650}.danger-text{border:0;background:transparent;color:var(--danger);display:flex;align-items:center;gap:5px;font-size:12px}.danger-text svg{width:14px}
-.field-hint{color:var(--muted);font-size:11px;font-weight:400}.toast,.error-toast{position:fixed;z-index:50;left:50%;bottom:24px;transform:translateX(-50%);background:#322d28;color:#fff;border-radius:9px;padding:10px 15px;box-shadow:var(--shadow);font-size:13px}.error-toast{background:var(--danger);display:flex;align-items:center;gap:10px}.error-toast button{border:0;background:transparent;color:#fff;padding:0}.toast-enter-active,.toast-leave-active{transition:.2s}.toast-enter-from,.toast-leave-to{opacity:0;transform:translate(-50%,8px)}
+.field-hint{color:var(--muted);font-size:11px;font-weight:400}.repeat-custom-fields{display:grid;gap:10px;padding:12px;border:1px solid var(--line);border-radius:11px;background:#fffaf4}.repeat-custom-fields>div,.repeat-custom-fields>label{display:flex;align-items:center;gap:8px;color:#675f54;font-size:12px}.repeat-custom-fields input[type="number"]{width:72px}.repeat-custom-fields input,.repeat-custom-fields select{min-height:40px;border:1px solid var(--line);border-radius:8px;background:#fff;padding:7px 9px}.weekday-picker{display:flex;gap:4px;flex-wrap:wrap}.weekday-picker label{width:34px;height:34px;display:grid;place-items:center;border:1px solid var(--line);border-radius:50%;background:#fff}.weekday-picker input{position:absolute;opacity:0;pointer-events:none}.weekday-picker label:has(input:checked){background:var(--accent);border-color:var(--accent);color:#fff}.toast,.error-toast{position:fixed;z-index:50;left:50%;bottom:24px;transform:translateX(-50%);background:#322d28;color:#fff;border-radius:9px;padding:10px 15px;box-shadow:var(--shadow);font-size:13px}.error-toast{background:var(--danger);display:flex;align-items:center;gap:10px}.error-toast button{border:0;background:transparent;color:#fff;padding:0}.toast-enter-active,.toast-leave-active{transition:.2s}.toast-enter-from,.toast-leave-to{opacity:0;transform:translate(-50%,8px)}
 @media(max-width:1050px){.shell{grid-template-columns:220px minmax(400px,1fr) 310px}main{padding-inline:24px}}
 @media(max-width:930px){.shell{height:100dvh;display:block;overflow:auto}.sidebar{position:fixed;z-index:50;display:flex;top:0;bottom:0;transition:transform .22s ease;box-shadow:var(--shadow);left:0;width:min(300px,86vw);transform:translateX(-105%)}.sidebar.open{transform:none}.detail{position:fixed;z-index:40;display:block;left:0;right:0;top:auto;bottom:0;width:100%;max-height:min(88dvh,760px);overflow:auto;background:#fffdf8;border:1px solid var(--line);border-bottom:0;border-radius:22px 22px 0 0;box-shadow:0 -14px 38px rgba(56,40,24,.2);transform:translateY(105%);transition:transform .22s ease;padding-bottom:max(16px,env(safe-area-inset-bottom))}.detail.open{transform:none}.detail-head{position:sticky;z-index:2;top:0;height:62px;background:#fffdf8;border-bottom:1px solid var(--line);padding:0 18px}.detail-head .icon{display:grid;width:42px;height:42px;background:var(--accent-soft);color:var(--accent);border-radius:50%}.detail-form{padding:18px}.detail-title textarea{font-size:21px}.more-mask{position:fixed;z-index:45;inset:0;background:rgba(45,38,31,.32);display:flex;align-items:flex-end}.more-sheet{width:100%;background:#fffdf8;border-radius:22px 22px 0 0;padding:14px 16px max(22px,env(safe-area-inset-bottom));display:grid;gap:6px}.more-sheet-head{display:flex;align-items:center;justify-content:space-between;padding:2px 4px 8px}.more-sheet>button{display:flex;align-items:center;gap:12px;border:0;background:#fff;padding:13px;border-radius:12px;text-align:left}.scrim{position:fixed;z-index:35;inset:0;background:rgba(45,38,31,.32);display:block}.mobile-only{display:grid}main{min-height:100dvh;padding:20px 17px 112px}.topbar{align-items:flex-start}.topbar h1{font-size:24px;margin:0 0 3px}.topbar.today-topbar{gap:10px}.today-board{gap:7px;margin:14px 0 4px}.today-stat{padding:10px 11px;border-radius:12px}.today-stat strong{font-size:20px}.search{width:auto;margin-bottom:13px;padding:8px}.search input{width:90px}.search kbd{display:none}.list-toolbar{height:auto;min-height:36px}.section-heading{margin:12px 0 8px}.empty{min-height:190px}.today-empty-panel{min-height:104px}.row-actions{position:static;opacity:1;pointer-events:auto}.row-actions button{padding:7px;min-height:34px}.list-row{padding:6px 4px}.archived-row{padding:9px 7px;border:1px dashed #e0cfae;border-radius:8px;color:#8a6d3b;background:#fbf3e2}.archived-row .list-row-main{padding-left:14px}.archived-row .list-row-main>svg{color:#c9a45c}.bottom{display:flex;position:fixed;z-index:15;left:0;right:0;bottom:0;justify-content:space-around;background:rgba(255,253,248,.96);border-top:1px solid var(--line);padding:8px 5px max(8px,env(safe-area-inset-bottom));box-shadow:0 -5px 18px rgba(79,59,34,.06)}.bottom button{min-height:44px;min-width:60px;border:0;background:transparent;color:#81786d;display:grid;place-items:center;gap:2px;font-size:10px}.bottom button.active{color:var(--accent);font-weight:700}.bottom svg{width:20px}.toast,.error-toast{bottom:142px}.task-row{padding-inline:2px}.subtask{padding-left:35px}.ghost{opacity:.45}}
 .mvp-view{display:grid;gap:16px;padding-bottom:36px}.view-intro{display:flex;align-items:end;justify-content:space-between;border-bottom:1px dashed var(--line);padding-bottom:12px}.view-intro h2{margin:2px 0 0;font-size:22px}.view-intro small,.view-intro>span{color:var(--muted);font-size:12px}.tool-card,.empty-panel{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px;box-shadow:0 3px 14px rgba(81,61,38,.05)}.soft-button,.primary-small,.danger-button,.file-button{min-height:44px;display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1px solid var(--line);background:#fff;border-radius:8px;padding:8px 11px;font-size:12px}.soft-button svg,.file-button svg{width:15px}.primary-small{background:var(--accent);border-color:var(--accent);color:#fff}.danger-button{color:var(--danger);border-color:#e5b7ad}.habit-list{display:grid;gap:10px}.tool-card h3{margin:0 0 4px}