feat: recurring tasks, habits, attachments, import/export, audit and security

frontend/src/style.css

@@ -9,4 +9,6 @@ main{min-width:0;padding:27px 34px 50px;overflow:auto;background:linear-gradient
 .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:800px){.shell{height:100dvh;display:block;overflow:auto}.sidebar,.detail{position:fixed;z-index:30;display:flex;top:0;bottom:0;transition:transform .22s ease;box-shadow:var(--shadow)}.sidebar{left:0;width:min(300px,86vw);transform:translateX(-105%)}.sidebar.open{transform:none}.detail{right:0;width:min(430px,94vw);transform:translateX(105%)}.detail.open{transform:none}.scrim{position:fixed;z-index:20;inset:0;background:rgba(45,38,31,.26)}.mobile-only{display:grid}main{min-height:100dvh;padding:20px 17px 112px}.topbar h1{font-size:24px;margin-bottom:17px}.search{width:auto;margin-bottom:13px;padding:8px}.search input{width:90px}.search kbd{display:none}.quick button{display:none}.select-box{opacity:.45}.row-actions{opacity:1}.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-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}.fab{display:grid;place-items:center;position:fixed;z-index:16;right:18px;bottom:76px;width:52px;height:52px;border:0;border-radius:50%;background:var(--accent);color:#fff;box-shadow:0 7px 20px rgba(241,90,41,.38);transition:transform .15s}.fab:active{transform:scale(.94)}.toast,.error-toast{bottom:142px}.batch-bar{overflow:auto}.batch-bar b{white-space:nowrap}.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}.calendar-card,.habit-card,.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)}.fc{--fc-button-bg-color:var(--accent);--fc-button-border-color:var(--accent);--fc-button-hover-bg-color:#cf461d;--fc-today-bg-color:#fff3eb;font-size:13px}.fc .fc-toolbar-title{font-size:18px}.fc .fc-event{border-color:var(--accent);background:var(--accent);cursor:grab}.soft-button,.primary-small,.danger-button,.file-button{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-create{display:grid;grid-template-columns:1fr 150px 90px auto;gap:8px}.habit-create input,.habit-create select{min-width:0;border:1px solid var(--line);border-radius:8px;background:#fff;padding:9px}.habit-create button{border:0;border-radius:8px;background:var(--accent);color:#fff;padding:8px 13px;display:flex;align-items:center;gap:5px}.habit-list{display:grid;gap:10px}.habit-title{display:flex;justify-content:space-between;align-items:start}.habit-title h3,.tool-card h3{margin:0 0 4px}.habit-title small{color:var(--muted)}.week-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:7px;margin-top:13px}.week-grid>div{display:grid;place-items:center;gap:5px;text-align:center}.week-grid small{color:var(--muted);font-size:10px}.habit-check{width:34px;height:34px;border-radius:50%;border:1px solid var(--line);background:#faf7f0}.habit-check.done{background:var(--accent);border-color:var(--accent);color:#fff}.week-grid input{width:100%;min-width:0;border:1px solid var(--line);border-radius:7px;padding:7px;text-align:center}.empty-panel{text-align:center;color:var(--muted)}.settings-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.tool-card{display:flex;flex-direction:column;align-items:flex-start;gap:10px}.tool-card>svg{color:var(--accent);width:25px;height:25px}.tool-card p{margin:0;color:var(--muted);font-size:13px}.tool-card.wide{grid-column:1/-1}.file-button input{display:none}.tool-card pre{width:100%;max-height:180px;overflow:auto;background:#f8f3e8;padding:10px;border-radius:8px;font-size:10px}.session-row,.audit-row{width:100%;display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--line);padding:9px 0}.session-row span{display:grid}.session-row small,.audit-row small{color:var(--muted);font-size:11px}.inline-error{padding:9px;border-radius:8px;color:var(--danger);background:#fff0ed}.settings.active{background:var(--accent-soft);color:#b7421e;font-weight:700}
+@media(max-width:800px){.habit-create{grid-template-columns:1fr 1fr}.habit-create button{justify-content:center}.settings-grid{grid-template-columns:1fr}.tool-card.wide{grid-column:auto}.fc .fc-toolbar{align-items:flex-start}.fc .fc-toolbar-title{font-size:16px}.calendar-card{padding:8px}.week-grid{gap:3px}.habit-card{padding:12px}.habit-check{width:30px;height:30px}}
 @media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation-duration:.01ms!important;transition-duration:.01ms!important}}