preview: serve fit_1280 + tighten timeline grid padding

InlinePreview was requesting fit_1920 for both the still image and
the video poster — roughly 3× the pixel count of what the pane
actually needs. Drop to fit_1280: still sharp inside the inline
pane (which the user resizes around 300–500px tall in practice)
while cutting payload by ~⅔.

Timeline: pull the grid wrapper padding in from `p-6 pb-24` to
`pr-2 pl-2 pb-2 overflow-x-hidden` now that the SplitGrid preview
pane sits above the grid — the old generous padding existed to
breathe under a full-screen modal that no longer renders inline.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

web/src/lib/components/preview/InlinePreview.svelte

@@ -85,13 +85,13 @@
 			{#key vf.Hash}
 				<VideoPlayer
 					src={videoUrl(vf.Hash)}
-					poster={thumbUrl(pf.Hash, 'fit_1920')}
+					poster={thumbUrl(pf.Hash, 'fit_1280')}
 					title={photoQuery.data.OriginalName ?? pf.Name ?? ''}
 				/>
 			{/key}
 		{:else}
 			<img
-				src={thumbUrl(pf.Hash, 'fit_1920')}
+				src={thumbUrl(pf.Hash, 'fit_1280')}
 				alt={photoQuery.data.OriginalName ?? pf.Name ?? 'Photo'}
 				class="max-h-full max-w-full rounded-md object-contain shadow-2xl"
 			/>

web/src/routes/+page.svelte

@@ -827,7 +827,7 @@
             sampleEvery: TILE_SAMPLE,
           }}
         >
-      <div class="p-6 pb-24">
+          <div class="pr-2 pl-2 pb-2 overflow-x-hidden">
             {#if photosQuery.isPending}
               <SkeletonGrid />
             {:else if photosQuery.isError}
@@ -841,15 +841,15 @@
                 {#if filters.section === "archive"}
                   Archive is empty.
                 {:else if filters.section === "review"}
-              Nothing left to review. Photos PhotoPrism's indexer wasn't sure
+                  Nothing left to review. Photos PhotoPrism's indexer wasn't
-              about land here — use Keep to accept them into the timeline or
+                  sure about land here — use Keep to accept them into the
-              Archive to set them aside.
+                  timeline or Archive to set them aside.
                 {:else if filters.section === "hidden"}
                   No hidden photos. PhotoPrism auto-hides files it can't index
                   (broken files, very low quality); they only ever show up here.
                 {:else if filters.section === "heap"}
-              This heap has no photos yet. Select some photos and use the bulk
+                  This heap has no photos yet. Select some photos and use the
-              bar's "＋ Add to heap" button.
+                  bulk bar's "＋ Add to heap" button.
                 {:else}
                   No photos. Index a folder via PhotoPrism's reindex command.
                 {/if}
@@ -892,7 +892,8 @@
                     >
                       {#if inWindow}
                         {@const sel =
-                      selectedIds.has(photo.UID) || focusedUid === photo.UID}
+                          selectedIds.has(photo.UID) ||
+                          focusedUid === photo.UID}
                         <PhotoTile
                           {photo}
                           selected={sel}