diff --git a/src/features/downloads/components/DownloadItem.svelte b/src/features/downloads/components/DownloadItem.svelte
index 8a16bad..8e5437f 100644
--- a/src/features/downloads/components/DownloadItem.svelte
+++ b/src/features/downloads/components/DownloadItem.svelte
@@ -39,8 +39,12 @@
   class:row-error={isError}
   class:row-selected={isSelected}
   class:row-removing={isRemoving}
+  role="option"
+  aria-selected={isSelected}
+  tabindex="0"
   use:rowLongPress
   onclick={(e) => { e.stopPropagation(); onSelect(item.chapter.id, e); }}
+  onkeydown={(e) => { if (e.key === ' ' || e.key === 'Enter') { e.preventDefault(); onSelect(item.chapter.id, e as unknown as MouseEvent); } }}
 >
   {#if manga?.thumbnailUrl}
     <div class="thumb">
diff --git a/src/features/downloads/components/Downloads.svelte b/src/features/downloads/components/Downloads.svelte
index 6159bd3..6baa1ab 100644
--- a/src/features/downloads/components/Downloads.svelte
+++ b/src/features/downloads/components/Downloads.svelte
@@ -115,7 +115,7 @@
   </div>
 
   <div class="bar-wrap">
-    <div class="status-bar" onclick={handleClickOff} role="presentation">
+    <div class="status-bar" role="none">
       <div class="status-dot" class:active={downloadStore.isRunning}></div>
       <span class="status-text">
         {downloadStore.togglingPlay
@@ -127,7 +127,7 @@
           <button class="sel-action-btn" disabled={downloadStore.batchWorking} onclick={(e) => { e.stopPropagation(); downloadStore.reorderSelectedToEdge("top"); }} title="Move to top">
             <ArrowLineUp size={12} weight="bold" />
           </button>
-          <div class="move-step" onclick={(e) => e.stopPropagation()} role="presentation">
+          <div class="move-step" onclick={(e) => e.stopPropagation()} onkeydown={(e) => e.stopPropagation()} role="none">
             <button class="sel-action-btn" disabled={downloadStore.batchWorking} onclick={(e) => { e.stopPropagation(); downloadStore.reorderSelected("up", moveBy); }} title="Move up">
               <CaretUp size={12} weight="bold" />
             </button>
@@ -168,7 +168,7 @@
     </div>
   </div>
 
-  <div class="content" onclick={handleClickOff}>
+  <div class="content" role="none" onclick={handleClickOff} onkeydown={(e) => e.key === 'Escape' && handleClickOff()}>
     <DownloadQueue
       queue={downloadStore.queue}
       loading={downloadStore.loading}
@@ -204,9 +204,6 @@
   .sel-controls { display: flex; align-items: center; gap: var(--sp-2); }
   .status-bar { cursor: default; }
   .bar-sep { width: 1px; height: 12px; background: var(--border-dim); flex-shrink: 0; }
-  .sel-count { font-family: var(--font-ui); font-size: var(--text-xs); color: var(--text-secondary); letter-spacing: var(--tracking-wide); white-space: nowrap; }
-  .sel-text-btn { font-family: var(--font-ui); font-size: var(--text-xs); color: var(--text-faint); background: none; border: none; cursor: pointer; padding: 2px 4px; border-radius: var(--radius-sm); transition: color var(--t-base); white-space: nowrap; }
-  .sel-text-btn:hover { color: var(--text-primary); }
   .sel-action-btn { display: flex; align-items: center; gap: 4px; font-family: var(--font-ui); font-size: var(--text-xs); padding: 3px 8px; border-radius: var(--radius-sm); border: 1px solid var(--border-dim); background: var(--bg-overlay); color: var(--text-muted); cursor: pointer; transition: color var(--t-base), border-color var(--t-base), background var(--t-base); white-space: nowrap; }
   .sel-action-btn:hover:not(:disabled) { color: var(--text-primary); border-color: var(--border-strong); }
   .sel-action-btn:disabled { opacity: 0.35; cursor: not-allowed; }
diff --git a/src/features/extensions/components/Extensions.svelte b/src/features/extensions/components/Extensions.svelte
index 4798379..8143223 100644
--- a/src/features/extensions/components/Extensions.svelte
+++ b/src/features/extensions/components/Extensions.svelte
@@ -323,8 +323,8 @@
   .root { display: flex; flex-direction: column; height: 100%; overflow: hidden; }
   .list { flex: 1; overflow-y: auto; padding: 0 var(--sp-4) var(--sp-4); display: flex; flex-direction: column; gap: 1px; }
   .empty { display: flex; align-items: center; justify-content: center; flex: 1; color: var(--text-faint); font-family: var(--font-ui); font-size: var(--text-xs); letter-spacing: var(--tracking-wide); }
-  .icon-btn { display: flex; align-items: center; justify-content: center; width: 28px; height: 28px; border-radius: var(--radius-md); color: var(--text-muted); transition: color var(--t-base), background var(--t-base); }
-  .icon-btn:hover:not(:disabled) { color: var(--text-primary); background: var(--bg-raised); }
+  :global(.icon-btn) { display: flex; align-items: center; justify-content: center; width: 28px; height: 28px; border-radius: var(--radius-md); color: var(--text-muted); transition: color var(--t-base), background var(--t-base); }
+  :global(.icon-btn:hover:not(:disabled)) { color: var(--text-primary); background: var(--bg-raised); }
   .ext-panel { display: flex; flex-direction: column; gap: var(--sp-2); padding: var(--sp-3) var(--sp-6); flex-shrink: 0; border-bottom: 1px solid var(--border-dim); background: var(--bg-raised); opacity: 1; }
   .ext-panel-anim { animation: panelSlide 0.18s cubic-bezier(0.16,1,0.3,1) both; }
   .panel-header { display: flex; align-items: center; padding-bottom: var(--sp-1); }
diff --git a/src/features/library/components/Library.svelte b/src/features/library/components/Library.svelte
index dbe302b..c3f6fee 100644
--- a/src/features/library/components/Library.svelte
+++ b/src/features/library/components/Library.svelte
@@ -44,7 +44,7 @@
   let search:         string      = $state("");
   let renderVisible:  number      = $state(store.settings.renderLimit ?? 48);
   let scrollEl:       HTMLDivElement;
-  let tabsEl:         HTMLDivElement;
+  let tabsEl         = $state<HTMLDivElement>(null!);
   let containerWidth: number      = $state(800);
   let ctx:      { x: number; y: number; manga: Manga } | null = $state(null);
   let emptyCtx: { x: number; y: number } | null              = $state(null);
diff --git a/src/features/library/components/LibraryGrid.svelte b/src/features/library/components/LibraryGrid.svelte
index b57baee..0a77d0f 100644
--- a/src/features/library/components/LibraryGrid.svelte
+++ b/src/features/library/components/LibraryGrid.svelte
@@ -95,7 +95,7 @@
   </div>
 {/if}
 
-<div class="content" onclick={(e) => { if (selectMode && !(e.target as HTMLElement).closest(".card")) onExitSelectMode(); }}>
+<div class="content" role="presentation" onclick={(e) => { if (selectMode && !(e.target as HTMLElement).closest(".card")) onExitSelectMode(); }}>
   {#if loading}
     <div class="grid">
       {#each Array(12) as _}
@@ -184,7 +184,6 @@
   .grid { position: relative; z-index: 1; isolation: isolate; display: grid; grid-template-columns: repeat(var(--cols, auto-fill), minmax(130px, 1fr)); gap: var(--sp-4); }
   .card { background: none; border: none; padding: 0; cursor: pointer; text-align: left; }
   .card.anims:not(.select-mode):hover .cover-wrap { transform: translateY(-3px); border-color: var(--border-strong); box-shadow: 0 6px 20px rgba(0,0,0,0.35); }
-  .card.anims:not(.select-mode):hover .cover { filter: brightness(1.1); }
   .card:not(.select-mode):hover .title { color: var(--text-primary); }
   .card.select-mode { cursor: default; }
   .card.card-selected .cover-wrap { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: var(--radius-md); }
@@ -192,7 +191,6 @@
   .cover-wrap { position: relative; aspect-ratio: 2/3; overflow: hidden; border-radius: var(--radius-md); background: var(--bg-raised); border: 1px solid var(--border-dim); will-change: transform; }
   .card.anims .cover-wrap { transition: transform 0.18s cubic-bezier(0.16,1,0.3,1), border-color var(--t-base), box-shadow 0.18s cubic-bezier(0.16,1,0.3,1); }
   .cover-wrap.completed { box-shadow: inset 0 -2px 0 0 var(--accent); }
-  .card.anims .cover { transition: filter var(--t-base); }
   .card-info-overlay { position: absolute; bottom: -4px; left: 0; right: 0; z-index: 2; padding: 32px 6px 10px; background: linear-gradient(to top, rgba(0,0,0,0.88) 0%, rgba(0,0,0,0.5) 50%, transparent 100%); opacity: 0; pointer-events: none; }
   .card-info-overlay.anim { transition: opacity 0.18s ease; }
   .card-info-overlay.instant { transition: none; }
diff --git a/src/features/library/components/LibraryToolbar.svelte b/src/features/library/components/LibraryToolbar.svelte
index a06d26e..600dfd8 100644
--- a/src/features/library/components/LibraryToolbar.svelte
+++ b/src/features/library/components/LibraryToolbar.svelte
@@ -266,11 +266,6 @@
   .panel-divider { height: 1px; background: var(--border-dim); margin: 4px 2px; }
   .panel-header { display: flex; align-items: center; justify-content: space-between; padding: 6px 10px 4px; }
   .panel-heading { font-family: var(--font-ui); font-size: var(--text-xs); letter-spacing: var(--tracking-wide); color: var(--text-secondary); font-weight: var(--weight-medium, 500); }
-  .panel-clear-btn { font-family: var(--font-ui); font-size: var(--text-2xs); letter-spacing: var(--tracking-wide); color: var(--text-faint); background: none; border: none; cursor: pointer; padding: 0; transition: color var(--t-base); }
-  .panel-clear-btn:hover { color: var(--color-error); }
-  .panel-item-check { justify-content: flex-start; gap: var(--sp-2); }
-  .panel-check { width: 13px; height: 13px; border-radius: 2px; border: 1px solid var(--border-strong); background: transparent; flex-shrink: 0; transition: background var(--t-base), border-color var(--t-base); display: flex; align-items: center; justify-content: center; color: var(--bg-base); }
-  .panel-check-on { background: var(--accent); border-color: var(--accent); }
   .dir-toggle { color: var(--text-secondary); justify-content: flex-start; gap: var(--sp-2); border-top: 1px solid var(--border-dim); border-radius: 0 0 var(--radius-sm) var(--radius-sm); margin-top: 2px; padding-top: 9px; }
   :global(.sort-caret) { flex-shrink: 0; }
 </style>
\ No newline at end of file
diff --git a/src/features/reader/components/PageView.svelte b/src/features/reader/components/PageView.svelte
index a06e30c..e1546d7 100644
--- a/src/features/reader/components/PageView.svelte
+++ b/src/features/reader/components/PageView.svelte
@@ -63,7 +63,7 @@
   let inspectPanStartX  = 0;
   let inspectPanStartY  = 0;
 
-  let stripDragging    = false;
+  let stripDragging    = $state(false);
   let stripDragMoved   = false;
   let stripDragStartY  = 0;
   let stripScrollStart = 0;
diff --git a/src/features/reader/components/Reader.svelte b/src/features/reader/components/Reader.svelte
index e7cb156..ffefb30 100644
--- a/src/features/reader/components/Reader.svelte
+++ b/src/features/reader/components/Reader.svelte
@@ -139,7 +139,7 @@
   let containerEl: HTMLDivElement | null = null;
   let pageViewRef: PageView;
   let zoomAnchor = { el: null as HTMLElement | null, offset: 0 };
-  let hideTimer: ReturnType<typeof setTimeout> | null = null;
+  let hideTimer = $state<ReturnType<typeof setTimeout> | null>(null);
   let markedRead  = new Set<number>();
   let appending   = false;
   let abortCtrl   = { current: null as AbortController | null };
diff --git a/src/features/reader/components/ReaderControls.svelte b/src/features/reader/components/ReaderControls.svelte
index ea54c30..4e7d081 100644
--- a/src/features/reader/components/ReaderControls.svelte
+++ b/src/features/reader/components/ReaderControls.svelte
@@ -306,6 +306,7 @@
       {#if readerState.winOpen}
         <div
           class="wc-clip wc-clip-{popoverSide}"
+          role="presentation"
           onmouseenter={wcResetTimer}
           onmousemove={wcResetTimer}
         >
diff --git a/src/features/reader/components/ReaderPresetPanel.svelte b/src/features/reader/components/ReaderPresetPanel.svelte
index 00a213f..09a29c7 100644
--- a/src/features/reader/components/ReaderPresetPanel.svelte
+++ b/src/features/reader/components/ReaderPresetPanel.svelte
@@ -108,7 +108,7 @@
   ];
 </script>
 
-<div class="backdrop" role="presentation" onclick={close} transition:fade={{ duration: 150 }}></div>
+<div class="backdrop" role="button" tabindex="-1" aria-label="Close settings" onclick={close} onkeydown={(e) => e.key === 'Escape' && close()} transition:fade={{ duration: 150 }}></div>
 
 <div
   class="panel"
@@ -130,12 +130,13 @@
       <p class="section-label">Page Style</p>
       <div class="option-grid">
         {#each styleOptions as o}
+          {@const Icon = o.icon}
           <button
             class="option-tile"
             class:active={style === o.value}
             onclick={() => onApplySettings({ pageStyle: o.value as typeof PAGE_STYLES[number] })}
           >
-            <div class="tile-icon"><svelte:component this={o.icon} size={18} weight={style === o.value ? "fill" : "light"} /></div>
+            <div class="tile-icon"><Icon size={18} weight={style === o.value ? "fill" : "light"} /></div>
             <span class="tile-label">{o.label}</span>
           </button>
         {/each}
@@ -149,6 +150,7 @@
             class:on={effectiveSettings.offsetDoubleSpreads}
             onclick={() => onApplySettings({ offsetDoubleSpreads: !effectiveSettings.offsetDoubleSpreads })}
             role="switch"
+            aria-label="Offset double spreads"
             aria-checked={effectiveSettings.offsetDoubleSpreads}
           ><span class="toggle-knob"></span></button>
         </label>
@@ -161,6 +163,7 @@
             class:on={effectiveSettings.pageGap ?? true}
             onclick={() => onApplySettings({ pageGap: !(effectiveSettings.pageGap ?? true) })}
             role="switch"
+            aria-label="Gap between pages"
             aria-checked={effectiveSettings.pageGap ?? true}
           ><span class="toggle-knob"></span></button>
         </label>
@@ -171,6 +174,7 @@
             class:on={store.settings.autoNextChapter ?? false}
             onclick={() => updateSettings({ autoNextChapter: !(store.settings.autoNextChapter ?? false) })}
             role="switch"
+            aria-label="Auto next chapter"
             aria-checked={store.settings.autoNextChapter ?? false}
           ><span class="toggle-knob"></span></button>
         </label>
@@ -181,12 +185,13 @@
       <p class="section-label">Fit Mode</p>
       <div class="option-grid">
         {#each fitOptions as o}
+          {@const Icon = o.icon}
           <button
             class="option-tile"
             class:active={fit === o.value}
             onclick={() => onApplySettings({ fitMode: o.value })}
           >
-            <div class="tile-icon"><svelte:component this={o.icon} size={18} weight={fit === o.value ? "fill" : "light"} /></div>
+            <div class="tile-icon"><Icon size={18} weight={fit === o.value ? "fill" : "light"} /></div>
             <span class="tile-label">{o.label}</span>
           </button>
         {/each}
@@ -240,7 +245,7 @@
         <span class="zoom-readout">{zoomPct}%</span>
       </div>
       <div class="zoom-row">
-        <button class="zoom-step" onclick={() => setZoom(zoom - 0.1)} disabled={zoom <= ZOOM_MIN}>−</button>
+        <button class="zoom-step" aria-label="Zoom out" onclick={() => setZoom(zoom - 0.1)} disabled={zoom <= ZOOM_MIN}>−</button>
         <input
           type="range"
           class="zoom-slider"
@@ -250,7 +255,7 @@
           value={zoomPct}
           oninput={(e) => setZoom(Number(e.currentTarget.value) / 100)}
         />
-        <button class="zoom-step" onclick={() => setZoom(zoom + 0.1)} disabled={zoom >= ZOOM_MAX}>+</button>
+        <button class="zoom-step" aria-label="Zoom in" onclick={() => setZoom(zoom + 0.1)} disabled={zoom >= ZOOM_MAX}>+</button>
       </div>
     </section>
 
@@ -263,6 +268,7 @@
           class:on={effectiveSettings.optimizeContrast}
           onclick={() => onApplySettings({ optimizeContrast: !effectiveSettings.optimizeContrast })}
           role="switch"
+          aria-label="Optimize contrast"
           aria-checked={effectiveSettings.optimizeContrast}
         ><span class="toggle-knob"></span></button>
       </label>
@@ -273,6 +279,7 @@
           class:on={store.settings.pinchZoom ?? false}
           onclick={() => updateSettings({ pinchZoom: !(store.settings.pinchZoom ?? false) })}
           role="switch"
+          aria-label="Pinch to zoom"
           aria-checked={store.settings.pinchZoom ?? false}
         ><span class="toggle-knob"></span></button>
       </label>
@@ -283,6 +290,7 @@
           class:on={store.settings.markReadOnNext ?? true}
           onclick={() => updateSettings({ markReadOnNext: !(store.settings.markReadOnNext ?? true) })}
           role="switch"
+          aria-label="Mark read on chapter advance"
           aria-checked={store.settings.markReadOnNext ?? true}
         ><span class="toggle-knob"></span></button>
       </label>
@@ -297,6 +305,7 @@
             class:on={perMangaEnabled}
             onclick={onTogglePerManga}
             role="switch"
+            aria-label="Per-manga settings"
             aria-checked={perMangaEnabled}
           ><span class="toggle-knob"></span></button>
         </label>
@@ -319,8 +328,8 @@
             bind:value={presetNameInput}
             onkeydown={(e) => { if (e.key === "Enter") commitSavePreset(); if (e.key === "Escape") presetSaving = false; }}
           />
-          <button class="small-btn" disabled={!presetNameInput.trim()} onclick={commitSavePreset}><Check size={12} weight="bold" /></button>
-          <button class="small-btn" onclick={() => presetSaving = false}><X size={12} weight="light" /></button>
+          <button class="small-btn" aria-label="Confirm" disabled={!presetNameInput.trim()} onclick={commitSavePreset}><Check size={12} weight="bold" /></button>
+          <button class="small-btn" aria-label="Cancel" onclick={() => presetSaving = false}><X size={12} weight="light" /></button>
         </div>
       {/if}
 
@@ -336,8 +345,8 @@
                   bind:value={presetEditName}
                   onkeydown={(e) => { if (e.key === "Enter") commitRenamePreset(); if (e.key === "Escape") presetEditId = null; }}
                 />
-                <button class="small-btn" disabled={!presetEditName.trim()} onclick={commitRenamePreset}><Check size={12} weight="bold" /></button>
-                <button class="small-btn" onclick={() => presetEditId = null}><X size={12} weight="light" /></button>
+                <button class="small-btn" aria-label="Confirm" disabled={!presetEditName.trim()} onclick={commitRenamePreset}><Check size={12} weight="bold" /></button>
+                <button class="small-btn" aria-label="Cancel" onclick={() => presetEditId = null}><X size={12} weight="light" /></button>
               </div>
             {:else}
               <div class="preset-row">
diff --git a/src/features/series/panels/CoverPickerPanel.svelte b/src/features/series/panels/CoverPickerPanel.svelte
index ecd25cb..8aef909 100644
--- a/src/features/series/panels/CoverPickerPanel.svelte
+++ b/src/features/series/panels/CoverPickerPanel.svelte
@@ -60,11 +60,13 @@
 
 <div
   class="backdrop"
-  role="presentation"
+  role="button"
+  tabindex="-1"
+  aria-label="Close cover picker"
   onclick={(e) => { if (e.target === e.currentTarget) onClose(); }}
   onkeydown={(e) => e.key === "Escape" && onClose()}
 >
-  <div class="modal" role="dialog" aria-label="Choose cover image" onkeydown={onKeydown}>
+  <div class="modal" role="dialog" aria-label="Choose cover image" tabindex="-1" onkeydown={onKeydown}>
     <div class="header">
       <span class="title">Cover Image</span>
 <button class="close-btn" onclick={onClose}><X size={14} weight="light" /></button>
@@ -142,12 +144,6 @@
     font-size: var(--text-sm); font-weight: var(--weight-medium);
     color: var(--text-secondary); flex: 1;
   }
-  .comparing {
-    font-family: var(--font-ui); font-size: 9px;
-    color: var(--text-faint); letter-spacing: var(--tracking-wider);
-    text-transform: uppercase;
-    animation: pulse 1.2s ease-in-out infinite;
-  }
   .close-btn {
     display: flex; align-items: center; justify-content: center;
     width: 26px; height: 26px; border-radius: var(--radius-sm);
diff --git a/src/features/series/panels/TrackingPanel.svelte b/src/features/series/panels/TrackingPanel.svelte
index 2575cb5..453e355 100644
--- a/src/features/series/panels/TrackingPanel.svelte
+++ b/src/features/series/panels/TrackingPanel.svelte
@@ -493,8 +493,8 @@
 {#if confirmUnbindId !== null}
   {@const rec = records.find(r => r.id === confirmUnbindId)}
   {@const trk = rec ? trackerFor(rec.trackerId) : null}
-  <div class="confirm-backdrop" role="presentation" onclick={() => confirmUnbindId = null}>
-    <div class="confirm-modal" role="dialog" onclick={(e) => e.stopPropagation()}>
+  <div class="confirm-backdrop" role="button" tabindex="-1" aria-label="Cancel" onclick={() => confirmUnbindId = null} onkeydown={(e) => { if (e.key === 'Escape') confirmUnbindId = null; }}>
+    <div class="confirm-modal" role="dialog" tabindex="-1" onclick={(e) => e.stopPropagation()} onkeydown={(e) => e.stopPropagation()}>
       <p class="confirm-title">Unlink from {trk?.name ?? "tracker"}?</p>
       <p class="confirm-body">Your progress on {trk?.name} is unaffected.</p>
       <div class="confirm-row">
diff --git a/src/features/settings/components/ThemeEditor.svelte b/src/features/settings/components/ThemeEditor.svelte
index 112562f..9215291 100644
--- a/src/features/settings/components/ThemeEditor.svelte
+++ b/src/features/settings/components/ThemeEditor.svelte
@@ -139,8 +139,8 @@
 
 <svelte:window onkeydown={onKey} />
 
-<div class="backdrop" role="presentation" onclick={onClose} onkeydown={(e) => e.key === "Escape" && onClose()}>
-  <div class="shell" role="dialog" aria-label="Theme editor" tabindex="0" style={toCssVars(tokens)} onclick={(e) => e.stopPropagation()}>
+<div class="backdrop" role="button" tabindex="-1" aria-label="Close theme editor" onclick={onClose} onkeydown={(e) => e.key === "Escape" && onClose()}>
+  <div class="shell" role="dialog" aria-label="Theme editor" tabindex="0" style={toCssVars(tokens)} onclick={(e) => e.stopPropagation()} onkeydown={(e) => e.stopPropagation()}>
 
     <header class="header">
       <div class="header-left">
diff --git a/src/features/settings/sections/AppearanceSettings.svelte b/src/features/settings/sections/AppearanceSettings.svelte
index 595dfee..56dc3a4 100644
--- a/src/features/settings/sections/AppearanceSettings.svelte
+++ b/src/features/settings/sections/AppearanceSettings.svelte
@@ -32,8 +32,8 @@
     mountSystemThemeSync();
   }
 
-  let triggerDark:  HTMLButtonElement;
-  let triggerLight: HTMLButtonElement;
+  let triggerDark  = $state<HTMLButtonElement>(null!);
+  let triggerLight = $state<HTMLButtonElement>(null!);
 </script>
 
 <div class="s-panel">
@@ -49,6 +49,7 @@
         class:on={store.settings.systemThemeSync}
         onclick={toggleSync}
         role="switch"
+        aria-label="Match system theme"
         aria-checked={store.settings.systemThemeSync}
       ><span class="s-toggle-thumb"></span></button>
     </div>
diff --git a/src/features/settings/sections/GeneralSettings.svelte b/src/features/settings/sections/GeneralSettings.svelte
index 4b18687..370a4f8 100644
--- a/src/features/settings/sections/GeneralSettings.svelte
+++ b/src/features/settings/sections/GeneralSettings.svelte
@@ -11,7 +11,7 @@
 
   let { selectOpen, closingSelect, toggleSelect, anims }: Props = $props();
 
-  let triggerIdleTimeout: HTMLButtonElement;
+  let triggerIdleTimeout = $state<HTMLButtonElement>(null!);
 </script>
 
 <div class="s-panel">
diff --git a/src/features/settings/sections/LibrarySettings.svelte b/src/features/settings/sections/LibrarySettings.svelte
index f023b9a..adefa9c 100644
--- a/src/features/settings/sections/LibrarySettings.svelte
+++ b/src/features/settings/sections/LibrarySettings.svelte
@@ -11,7 +11,7 @@
 
   let { selectOpen, toggleSelect, anims }: Props = $props();
 
-  let triggerSortDir: HTMLButtonElement;
+  let triggerSortDir = $state<HTMLButtonElement>(null!);
 </script>
 
 <div class="s-panel">
diff --git a/src/features/settings/sections/ReaderSettings.svelte b/src/features/settings/sections/ReaderSettings.svelte
index 3fbc436..46385c7 100644
--- a/src/features/settings/sections/ReaderSettings.svelte
+++ b/src/features/settings/sections/ReaderSettings.svelte
@@ -11,9 +11,9 @@
 
   let { selectOpen, toggleSelect, anims }: Props = $props();
 
-  let triggerPageStyle:  HTMLButtonElement;
-  let triggerReadingDir: HTMLButtonElement;
-  let triggerFitMode:    HTMLButtonElement;
+  let triggerPageStyle  = $state<HTMLButtonElement>(null!);
+  let triggerReadingDir = $state<HTMLButtonElement>(null!);
+  let triggerFitMode    = $state<HTMLButtonElement>(null!);
 </script>
 
 <div class="s-panel">
diff --git a/src/features/settings/sections/SecuritySettings.svelte b/src/features/settings/sections/SecuritySettings.svelte
index 2342976..aa98806 100644
--- a/src/features/settings/sections/SecuritySettings.svelte
+++ b/src/features/settings/sections/SecuritySettings.svelte
@@ -200,7 +200,7 @@
           <div class="s-row-info"><span class="s-label">Password</span></div>
           <div class="s-field-wrap">
             <input class="s-input" type={showAuthPass ? "text" : "password"} bind:value={authPassword} placeholder="Password" autocomplete="off" spellcheck="false" disabled={secLoading} />
-            <button class="s-eye-btn" onclick={() => showAuthPass = !showAuthPass} tabindex="-1">{@html showAuthPass ? EyeClose : EyeOpen}</button>
+            <button class="s-eye-btn" onclick={() => showAuthPass = !showAuthPass} tabindex="-1" aria-label={showAuthPass ? "Hide password" : "Show password"}>{@html showAuthPass ? EyeClose : EyeOpen}</button>
           </div>
         </div>
       {/if}
@@ -236,7 +236,7 @@
     <div class="s-section-body">
       <label class="s-row">
         <div class="s-row-info"><span class="s-label">Enable SOCKS proxy</span><span class="s-desc">Route Suwayomi traffic through a SOCKS4/5 proxy</span></div>
-        <button role="switch" aria-checked={socksEnabled} class="s-toggle" class:on={socksEnabled}
+        <button role="switch" aria-checked={socksEnabled} aria-label="Enable SOCKS proxy" class="s-toggle" class:on={socksEnabled}
           onclick={() => { socksEnabled = !socksEnabled; saveSocksProxy(); }}><span class="s-toggle-thumb"></span></button>
       </label>
       {#if socksEnabled}
@@ -272,7 +272,7 @@
           <div class="s-row-info"><span class="s-label">Password</span><span class="s-desc">Optional</span></div>
           <div class="s-field-wrap">
             <input class="s-input" type={showSocksPass ? "text" : "password"} bind:value={socksPassword} placeholder="Password" autocomplete="off" spellcheck="false" />
-            <button class="s-eye-btn" onclick={() => showSocksPass = !showSocksPass} tabindex="-1">{@html showSocksPass ? EyeClose : EyeOpen}</button>
+            <button class="s-eye-btn" onclick={() => showSocksPass = !showSocksPass} tabindex="-1" aria-label={showSocksPass ? "Hide password" : "Show password"}>{@html showSocksPass ? EyeClose : EyeOpen}</button>
           </div>
         </div>
         <div class="s-row">
@@ -290,7 +290,7 @@
     <div class="s-section-body">
       <label class="s-row">
         <div class="s-row-info"><span class="s-label">Enable FlareSolverr</span><span class="s-desc">Bypass Cloudflare challenges for sources that require it</span></div>
-        <button role="switch" aria-checked={flareEnabled} class="s-toggle" class:on={flareEnabled}
+        <button role="switch" aria-checked={flareEnabled} aria-label="Enable FlareSolverr" class="s-toggle" class:on={flareEnabled}
           onclick={() => { flareEnabled = !flareEnabled; saveFlareSolverr(); }}><span class="s-toggle-thumb"></span></button>
       </label>
       {#if flareEnabled}
@@ -320,7 +320,7 @@
         </div>
         <label class="s-row">
           <div class="s-row-info"><span class="s-label">Response fallback</span><span class="s-desc">Use FlareSolverr's response when the direct request fails</span></div>
-          <button role="switch" aria-checked={flareFallback} class="s-toggle" class:on={flareFallback}
+          <button role="switch" aria-checked={flareFallback} aria-label="Response fallback" class="s-toggle" class:on={flareFallback}
             onclick={() => flareFallback = !flareFallback}><span class="s-toggle-thumb"></span></button>
         </label>
         <div class="s-row">
diff --git a/src/features/settings/sections/TrackingSettings.svelte b/src/features/settings/sections/TrackingSettings.svelte
index bd83245..08a7a7b 100644
--- a/src/features/settings/sections/TrackingSettings.svelte
+++ b/src/features/settings/sections/TrackingSettings.svelte
@@ -210,7 +210,7 @@
       </div>
       <button class="s-toggle" class:on={store.settings.trackerSyncBack}
         onclick={() => updateSettings({ trackerSyncBack: !store.settings.trackerSyncBack })}
-        role="switch" aria-checked={store.settings.trackerSyncBack}>
+        role="switch" aria-checked={store.settings.trackerSyncBack} aria-label="Enable sync back">
         <span class="s-toggle-thumb"></span>
       </button>
     </div>
@@ -221,7 +221,7 @@
           <span class="s-label">Chapter number tolerance</span>
           <span class="s-desc">Allow source and tracker chapter numbers to differ by up to the set amount. When off, the tracker number is used as-is with no range check.</span>
         </div>
-        <button role="switch" aria-checked={store.settings.trackerSyncBackThreshold !== null} class="s-toggle" class:on={store.settings.trackerSyncBackThreshold !== null}
+        <button role="switch" aria-checked={store.settings.trackerSyncBackThreshold !== null} aria-label="Chapter number tolerance" class="s-toggle" class:on={store.settings.trackerSyncBackThreshold !== null}
           onclick={() => updateSettings({ trackerSyncBackThreshold: store.settings.trackerSyncBackThreshold !== null ? null : 20 })}>
           <span class="s-toggle-thumb"></span>
         </button>
@@ -244,7 +244,7 @@
         </div>
         <button class="s-toggle" class:on={store.settings.trackerRespectScanlatorFilter}
           onclick={() => updateSettings({ trackerRespectScanlatorFilter: !store.settings.trackerRespectScanlatorFilter })}
-          role="switch" aria-checked={store.settings.trackerRespectScanlatorFilter}>
+          role="switch" aria-checked={store.settings.trackerRespectScanlatorFilter} aria-label="Respect scanlator filter">
           <span class="s-toggle-thumb"></span>
         </button>
       </div>
diff --git a/src/features/tracking/components/TrackingPreview.svelte b/src/features/tracking/components/TrackingPreview.svelte
index 01e6e62..d4b9c7f 100644
--- a/src/features/tracking/components/TrackingPreview.svelte
+++ b/src/features/tracking/components/TrackingPreview.svelte
@@ -20,8 +20,13 @@
   let updatingId     = $state<number | null>(null);
   let syncingId      = $state<number | null>(null);
   let editingChapter = $state(false);
-  let chapterDraft   = $state(record.lastChapterRead);
-  let scoreDraft     = $state(record.displayScore ?? "");
+  let chapterDraft   = $state(0);
+  let scoreDraft     = $state("");
+
+  $effect(() => {
+    chapterDraft = record.lastChapterRead;
+    scoreDraft   = record.displayScore ?? "";
+  });
   let confirmUnbind  = $state(false);
 
   const isBusy     = $derived(updatingId === record.id);
@@ -123,8 +128,11 @@
 
 <div
   class="backdrop"
-  role="presentation"
+  role="button"
+  tabindex="-1"
+  aria-label="Close tracking detail"
   onclick={(e) => { if (e.target === e.currentTarget) onClose(); }}
+  onkeydown={(e) => { if (e.key === 'Escape') onClose(); }}
 >
   <div class="modal" role="dialog" aria-label="Tracking detail">
 
@@ -323,8 +331,8 @@
 </div>
 
 {#if confirmUnbind}
-  <div class="confirm-backdrop" role="presentation" onclick={() => confirmUnbind = false}>
-    <div class="confirm-modal" role="dialog" aria-modal="true" onclick={(e) => e.stopPropagation()}>
+  <div class="confirm-backdrop" role="button" tabindex="-1" aria-label="Cancel" onclick={() => confirmUnbind = false} onkeydown={(e) => { if (e.key === 'Escape') confirmUnbind = false; }}>
+    <div class="confirm-modal" role="dialog" aria-modal="true" tabindex="-1" onclick={(e) => e.stopPropagation()} onkeydown={(e) => e.stopPropagation()}>
       <div class="confirm-icon"><X size={16} weight="bold" /></div>
       <p class="confirm-title">Unlink from {record.tracker.name}?</p>
       <p class="confirm-body"><strong>{record.title}</strong> will be removed from your list. Your progress on {record.tracker.name} is unaffected.</p>
diff --git a/src/shared/chrome/Toaster.svelte b/src/shared/chrome/Toaster.svelte
index 15dc87e..4ec7a2b 100644
--- a/src/shared/chrome/Toaster.svelte
+++ b/src/shared/chrome/Toaster.svelte
@@ -49,7 +49,7 @@
 {#if store.toasts.length}
   <div class="toaster" aria-live="polite">
     {#each store.toasts as t (t.id)}
-      <div role="alert" class="toast toast-{t.kind}" data-toast-id={t.id} onclick={() => dismiss(t.id)}>
+      <button class="toast toast-{t.kind}" data-toast-id={t.id} aria-label="{t.title}{t.body ? ': ' + t.body : ''}" onclick={() => dismiss(t.id)}>
         <div class="accent-bar"></div>
         <span class="icon">
           <svg width="13" height="13" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
@@ -60,7 +60,7 @@
           <p class="title">{t.title}</p>
           <p class="sub">{t.body ?? '\u00a0'}</p>
         </div>
-      </div>
+      </button>
     {/each}
   </div>
 {/if}
diff --git a/src/shared/manga/MangaPreview.svelte b/src/shared/manga/MangaPreview.svelte
index a588f54..9a15253 100644
--- a/src/shared/manga/MangaPreview.svelte
+++ b/src/shared/manga/MangaPreview.svelte
@@ -355,7 +355,9 @@
 {#if store.previewManga}
 <div
   class="backdrop"
-  role="presentation"
+  role="button"
+  tabindex="-1"
+  aria-label="Close preview"
   onclick={(e) => { if (e.target === e.currentTarget) close(); }}
   onkeydown={(e) => { if (e.key === "Escape") close(); }}
 >
diff --git a/src/shared/ui/ContextMenu.svelte b/src/shared/ui/ContextMenu.svelte
index 66beb8b..4ca4f77 100644
--- a/src/shared/ui/ContextMenu.svelte
+++ b/src/shared/ui/ContextMenu.svelte
@@ -23,7 +23,7 @@
   let focused  = $state(-1);
   let el       = $state<HTMLDivElement | undefined>(undefined);
   let measured = $state(false);
-  let pos      = $state({ left: x, top: y });
+  let pos      = $state({ left: 0, top: 0 });
   let subOpen  = $state(-1);
   let subEls   = $state<(HTMLDivElement | null)[]>([]);
 
@@ -159,7 +159,7 @@
           {#if hasSub}<span class="sub-arrow">›</span>{/if}
         </button>
         {#if hasSub && subOpen === i}
-          <div bind:this={subEls[i]} class="menu submenu" role="menu"
+          <div bind:this={subEls[i]} class="menu submenu" role="menu" tabindex="-1"
             onmouseenter={() => { subOpen = i; }}>
             {#each mi.children as child}
               {#if "separator" in child}
@@ -204,7 +204,7 @@
     animation: scaleIn 0.08s ease both;
     transform-origin: top left;
   }
-  .submenu.sub-flip {
+  :global(.submenu.sub-flip) {
     left: auto;
     right: 100%;
     transform-origin: top right;