Finish phase 2

src/lib/core/ui/idle.ts

@@ -0,0 +1,49 @@
+const IDLE_EVENTS = ['mousemove', 'mousedown', 'keydown', 'touchstart', 'wheel'] as const;
+
+export function mountIdleDetection(
+  getTimeoutMinutes: () => number | undefined,
+  onIdle: () => void,
+  onActive: () => void,
+): () => void {
+  let timer: ReturnType<typeof setTimeout> | null = null;
+  let idle = false;
+
+  const markActive = () => {
+    if (!idle) return;
+    idle = false;
+    onActive();
+  };
+
+  const resetTimer = () => {
+    if (timer) clearTimeout(timer);
+
+    const timeoutMinutes = getTimeoutMinutes() ?? 5;
+    const timeoutMs = Math.max(0, timeoutMinutes) * 60 * 1000;
+
+    if (timeoutMs === 0) {
+      markActive();
+      return;
+    }
+
+    markActive();
+
+    timer = setTimeout(() => {
+      if (idle) return;
+      idle = true;
+      onIdle();
+    }, timeoutMs);
+  };
+
+  IDLE_EVENTS.forEach((eventName) => {
+    window.addEventListener(eventName, resetTimer, { passive: true });
+  });
+
+  resetTimer();
+
+  return () => {
+    if (timer) clearTimeout(timer);
+    IDLE_EVENTS.forEach((eventName) => {
+      window.removeEventListener(eventName, resetTimer);
+    });
+  };
+}

src/lib/core/ui/zoom.ts

@@ -22,6 +22,20 @@ export function zoomDelta(e: KeyboardEvent, current: number): number | null {
   return null;
 }
 
+export function mountZoomKey(getCurrent: () => number, onChange: (next: number) => void): () => void {
+  const handleKey = (event: KeyboardEvent) => {
+    const nextZoom = zoomDelta(event, getCurrent());
+    if (nextZoom === null) return;
+    onChange(nextZoom);
+  };
+
+  window.addEventListener('keydown', handleKey);
+
+  return () => {
+    window.removeEventListener('keydown', handleKey);
+  };
+}
+
 export function clampZoom(z: number, min: number, max: number): number {
   return Math.round(Math.min(max, Math.max(min, z)) * 1000) / 1000;
 }

src/lib/state/app.svelte.ts

@@ -8,4 +8,5 @@ export const appState = $state({
   authMode:        'NONE' as 'NONE' | 'BASIC_AUTH' | 'UI_LOGIN',
   platform:        'web' as 'web' | 'tauri' | 'capacitor',
   version:         '',
+  idle:            false,
 })

src/lib/ui/chrome/Sidebar.svelte

@@ -1,8 +1,7 @@
 <script lang="ts">
   import { page } from '$app/stores'
-  import { goto } from '$app/navigation'
   import {
-    House, Books, MagnifyingGlass, ClockCounterClockwise,
+    House, Books, MagnifyingGlass,
     DownloadSimple, PuzzlePiece, GearSix, ChartLineUp,
   } from 'phosphor-svelte'
   import logoUrl from '$lib/assets/moku-icon-wordmark.svg'
@@ -27,33 +26,45 @@
   )
 
   const indicatorY = $derived(activeIndex * (TAB_SIZE + TAB_GAP))
+
+  function isActive(path: string) {
+    if (path === '/') return $page.url.pathname === '/'
+    return $page.url.pathname === path || $page.url.pathname.startsWith(`${path}/`)
+  }
 </script>
 
 <aside class="root">
-  <button class="logo" onclick={() => goto('/')} title="Home" aria-label="Go to Home">
+  <a class="logo" href="/" title="Home" aria-label="Go to Home">
     <div class="logo-icon" style="mask-image: url({logoUrl}); -webkit-mask-image: url({logoUrl})"></div>
-  </button>
+  </a>
 
   <nav class="nav">
     {#if activeIndex >= 0}
       <div class="indicator" style="transform: translateX(-50%) translateY({indicatorY}px)"></div>
     {/if}
     {#each TABS as tab}
-      <button
+      <a
         class="tab"
-        class:active={activeIndex === TABS.indexOf(tab)}
+        class:active={isActive(tab.path)}
         title={tab.label}
-        onclick={() => goto(tab.path)}
+        href={tab.path}
+        aria-current={isActive(tab.path) ? 'page' : undefined}
       >
         <tab.icon size={18} weight="light" />
-      </button>
+      </a>
     {/each}
   </nav>
 
   <div class="bottom">
-    <button class="settings-btn" onclick={() => goto('/settings')} title="Settings">
+    <a
+      class="settings-btn"
+      class:active={isActive('/settings')}
+      href="/settings"
+      title="Settings"
+      aria-current={isActive('/settings') ? 'page' : undefined}
+    >
       <GearSix size={18} weight="light" />
-    </button>
+    </a>
   </div>
 </aside>
 
@@ -80,6 +91,7 @@
     margin-bottom: var(--sp-4);
     border-radius: var(--radius-lg);
     transition: opacity var(--t-base), transform var(--t-base);
+    text-decoration: none;
   }
   .logo:hover            { opacity: 0.8; transform: scale(0.96); }
   .logo:active           { transform: scale(0.92); }
@@ -140,6 +152,7 @@
     border-radius: var(--radius-md);
     color: var(--text-faint);
     transition: color var(--t-base), background var(--t-base);
+    text-decoration: none;
   }
   .tab:hover          { color: var(--text-muted); background: var(--bg-raised); }
   .tab:active         { transform: scale(0.88); }
@@ -167,7 +180,9 @@
     border-radius: var(--radius-md);
     color: var(--text-faint);
     transition: color var(--t-base), background var(--t-base), transform var(--t-slow);
+    text-decoration: none;
   }
   .settings-btn:hover         { color: var(--text-muted); background: var(--bg-raised); transform: rotate(30deg); }
   .settings-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }
+  .settings-btn.active        { color: var(--accent-fg); background: var(--accent-muted); transform: none; }
 </style>

src/routes/+layout.svelte

@@ -1,5 +1,11 @@
 <script lang="ts">
+  import { onMount } from 'svelte'
+  import { page } from '$app/stores'
+  import { applyTheme } from '$lib/core/theme'
+  import { mountIdleDetection } from '$lib/core/ui/idle'
+  import { applyZoom, mountZoomKey } from '$lib/core/ui/zoom'
   import { appState } from '$lib/state/app.svelte'
+  import { settingsState, updateSettings } from '$lib/state/settings.svelte'
   import { notificationsState } from '$lib/state/notifications.svelte'
   import SplashScreen from '$lib/ui/chrome/SplashScreen.svelte'
   import AuthGate     from '$lib/ui/chrome/AuthGate.svelte'
@@ -10,17 +16,17 @@
 
   let { children } = $props()
 
-  const isTauri = typeof window !== 'undefined' && '__TAURI_INTERNALS__' in window
-  const ringFull = $derived(appState.status !== 'booting')
-
   let splashVisible = $state(true)
   let bypassed      = $state(false)
 
-  const showApp = $derived(
-    appState.status === 'ready' ||
-    appState.status === 'auth'  ||
-    bypassed
-  )
+  const isTauri = typeof window !== 'undefined' && '__TAURI_INTERNALS__' in window
+  const pathname = $derived($page.url.pathname as string)
+  const hideShellChrome = $derived(pathname === '/reader' || pathname.startsWith('/reader/'))
+  const ringFull = $derived(appState.status !== 'booting')
+  const showSplash = $derived((appState.status === 'booting' || appState.status === 'error') && !bypassed)
+  const showAuthGate = $derived(appState.status === 'auth')
+  const showShell = $derived(appState.status === 'ready' || bypassed)
+  const splashCards = $derived(settingsState.splashCards ?? true)
 
   function onSplashReady() {
     splashVisible = false
@@ -30,36 +36,89 @@
     bypassed      = true
     splashVisible = false
   }
+
+  onMount(() => {
+    applyTheme(settingsState.theme, settingsState.customThemes)
+    applyZoom(settingsState.uiZoom)
+
+    const stopZoomKey = mountZoomKey(
+      () => settingsState.uiZoom,
+      (nextZoom) => updateSettings({ uiZoom: nextZoom })
+    )
+
+    const stopIdleDetection = mountIdleDetection(
+      () => settingsState.idleTimeoutMin,
+      () => {
+        appState.idle = true
+      },
+      () => {
+        appState.idle = false
+      }
+    )
+
+    const handleResize = () => {
+      applyZoom(settingsState.uiZoom)
+    }
+
+    window.addEventListener('resize', handleResize, { passive: true })
+
+    let stopTauriScale: (() => void) | null = null
+
+    if (isTauri) {
+      void import('@tauri-apps/api/window').then(async ({ getCurrentWindow }) => {
+        stopTauriScale = await getCurrentWindow().onScaleChanged(() => {
+          applyZoom(settingsState.uiZoom)
+        })
+      })
+    }
+
+    return () => {
+      appState.idle = false
+      stopZoomKey()
+      stopIdleDetection()
+      window.removeEventListener('resize', handleResize)
+      stopTauriScale?.()
+    }
+  })
 </script>
 
-{#if splashVisible}
+{#if showSplash && splashVisible}
   <SplashScreen
     mode="loading"
     {ringFull}
     failed={appState.status === 'error'}
+    showCards={splashCards}
     onReady={onSplashReady}
     onBypass={onSplashBypass}
     onRetry={() => window.location.reload()}
   />
 {/if}
 
-{#if showApp}
-  <div class="frame">
-    <div class="shell">
-      {#if isTauri}
-        <TitleBar onClose={() => import('@tauri-apps/api/window').then(m => m.getCurrentWindow().close())} />
-      {/if}
-      <div class="body">
-        <Sidebar />
-        <main class="main">
-          {@render children()}
-        </main>
+{#if showShell}
+  {#if hideShellChrome}
+    <main class="reader-main">
+      {@render children()}
+    </main>
+  {:else}
+    <div class="frame">
+      <div class="shell">
+        {#if isTauri}
+          <TitleBar onClose={() => import('@tauri-apps/api/window').then(m => m.getCurrentWindow().close())} />
+        {/if}
+        <div class="body">
+          <Sidebar />
+          <main class="main">
+            {@render children()}
+          </main>
+        </div>
       </div>
     </div>
-  </div>
+  {/if}
 {/if}
 
-<AuthGate />
+{#if showAuthGate}
+  <AuthGate />
+{/if}
 <Toaster toasts={notificationsState.toasts} />
 
 <style>
@@ -99,4 +158,11 @@
     contain: layout style;
     min-width: 0;
   }
+
+  .reader-main {
+    width: 100%;
+    height: 100%;
+    overflow: hidden;
+    background: var(--bg-base);
+  }
 </style>