Add e-book sidecar integration and improve request handling

Introduces optional e-book sidecar downloads from Anna's Archive, including admin UI, settings API, FlareSolverr integration, and documentation. Enhances request creation logic to prevent duplicate downloads by checking for 'downloaded' and 'available' statuses, updates UI to reflect processing state, and adds SABnzbd support to download and cleanup flows. Also updates ranking algorithm documentation and improves cache invalidation for recent requests.

src/lib/utils/ranking-algorithm.ts

@@ -350,14 +350,37 @@ export class RankingAlgorithm {
         const beforeWords = extractWords(beforeTitle, stopWords);
 
         // Title is complete if:
-        // 1. No significant words before it (not "This Inevitable Ruin" + "Dungeon Crawler Carl")
+        // 1. Acceptable prefix (no words, OR structured metadata like "Author - Series - ")
         // 2. Followed by clear metadata markers (not "'s Secret" or " Is Watching")
         const metadataMarkers = [' by ', ' - ', ' [', ' (', ' {', ' :', ','];
-        const hasNoWordsPrefix = beforeWords.length === 0;
         const hasMetadataSuffix = afterTitle === '' ||
                                   metadataMarkers.some(marker => afterTitle.startsWith(marker));
 
-        const isCompleteTitle = hasNoWordsPrefix && hasMetadataSuffix;
+        // Check prefix validity:
+        // - No words before = clean match
+        // - Title preceded by separator (` - `, `: `) = structured metadata (Author - Series - Title)
+        // - Author name in prefix = author attribution before title
+        const hasNoWordsPrefix = beforeWords.length === 0;
+
+        // Check if title is immediately preceded by a metadata separator
+        // This handles "Author - Series - 01 - Title" patterns
+        const precedingText = beforeTitle.trimEnd();
+        const titlePrecededBySeparator =
+          precedingText.endsWith('-') ||
+          precedingText.endsWith(':') ||
+          precedingText.endsWith('—');
+
+        // Check if author name appears in the prefix
+        // This handles "Author Name - Title" patterns
+        const authorInPrefix = requestAuthor.length > 2 &&
+          beforeTitle.includes(requestAuthor);
+
+        const hasAcceptablePrefix =
+          hasNoWordsPrefix ||
+          titlePrecededBySeparator ||
+          authorInPrefix;
+
+        const isCompleteTitle = hasAcceptablePrefix && hasMetadataSuffix;
 
         if (isCompleteTitle) {
           // Complete title match → full points