web: de-brand PhotoPrism references in user-facing copy

Replaces "PhotoPrism" in UI strings (empty states, tooltips, toasts,
log header, login screen) with neutral terms like "the indexer", "the
library", "the server" — accurate regardless of backend. The login
header becomes "Mulimage" and drops the explicit PhotoPrism mention.

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

web/src/routes/+page.svelte

@@ -856,13 +856,13 @@
                 <EmptyState
                   icon={Sparkles}
                   title="Nothing left to review"
-                  description="Photos PhotoPrism's indexer wasn't sure about land here — use Keep to accept them into the timeline or Archive to set them aside."
+                  description="Photos the indexer wasn't sure about land here — use Keep to accept them into the timeline or Archive to set them aside."
                 />
               {:else if filters.section === "hidden"}
                 <EmptyState
                   icon={EyeOff}
                   title="No hidden photos"
-                  description="PhotoPrism auto-hides files it can't index (broken files, very low quality); they only ever show up here."
+                  description="The indexer auto-hides files it can't read (broken files, very low quality); they only ever show up here."
                 />
               {:else if filters.section === "heap"}
                 <EmptyState
@@ -874,7 +874,7 @@
                 <EmptyState
                   icon={ImageOff}
                   title="No photos"
-                  description="Index a folder via PhotoPrism's reindex command."
+                  description="Index a folder from Settings → Index, or run a reindex from the server."
                 />
               {/if}
             {:else}

web/src/routes/login/+page.svelte

@@ -61,8 +61,8 @@
 		class="w-full max-w-sm space-y-5 rounded-lg border border-border bg-card p-8 shadow-sm"
 	>
 		<header class="space-y-1">
-			<h1 class="text-2xl font-semibold tracking-tight text-foreground">Mule</h1>
-			<p class="text-sm text-muted-foreground">Sign in with your PhotoPrism account.</p>
+			<h1 class="text-2xl font-semibold tracking-tight text-foreground">Mulimage</h1>
+			<p class="text-sm text-muted-foreground">Sign in to your account.</p>
 		</header>
 
 		<label class="block space-y-1.5">

web/src/routes/review/+page.svelte

@@ -242,10 +242,10 @@
 					<EmptyState icon={Sparkles} title="Nothing to review">
 						{#snippet descriptionSnippet()}
 							<p>
-								PhotoPrism's indexer flags photos with a low quality score for human
-								review. New arrivals with missing EXIF, low resolution, or unknown
-								cameras will land here. The Stacks and Cross-folder tabs above stay
-								available for duplicate cleanup.
+								The indexer flags photos with a low quality score for human review. New
+								arrivals with missing EXIF, low resolution, or unknown cameras will land
+								here. The Stacks and Cross-folder tabs above stay available for
+								duplicate cleanup.
 							</p>
 						{/snippet}
 					</EmptyState>