feat: add channel categories and improved creator detection

- Add category field to TelegramChannel (filterable tag like STL, PDF, D&D)
- Category column in channels table with edit via dropdown menu
- Improved creator extraction: filename patterns + channel title fallback
- extractCreatorFromChannelTitle strips [Completed], (Paid), emoji, etc.
- Fix ArchiveType in PackageListItem and PackageRow for new types
- Add Prisma migration for category column

worker/src/archive/creator.ts

@@ -1,21 +1,71 @@
 /**
  * Extract a creator name from common archive file naming patterns.
  *
- * Priority in the worker: topic name > filename extraction.
- * This is the fallback when no forum topic name is available.
+ * Priority in the worker: topic name > filename extraction > channel title > null.
  *
- * Patterns handled (split on ` - `):
+ * Patterns handled:
  *   "Mammoth Factory - 2026-01.zip"        → "Mammoth Factory"
  *   "Artist Name - Pack Title.part01.rar"   → "Artist Name"
+ *   "ArtistName_PackTitle.zip"              → null (ambiguous)
  *   "some_random_file.zip"                  → null
  */
 export function extractCreatorFromFileName(fileName: string): string | null {
-  // Strip archive extensions (.zip, .rar, .part01.rar, .z01, etc.)
-  const bare = fileName.replace(/(\.(part\d+\.rar|z\d{2}|zip|rar))+$/i, "");
+  // Strip archive/document extensions
+  const bare = fileName.replace(
+    /(\.(part\d+\.rar|z\d{2}|zip|rar|7z|pdf|stl|obj|3mf|step|stp|blend|gcode|svg|dxf|ai|eps|psd))+$/i,
+    ""
+  );
 
-  const idx = bare.indexOf(" - ");
-  if (idx <= 0) return null;
+  // Pattern 1: "Creator - Title" (most common)
+  const dashIdx = bare.indexOf(" - ");
+  if (dashIdx > 0) {
+    const creator = bare.slice(0, dashIdx).trim();
+    if (creator.length > 1) return creator;
+  }
 
-  const creator = bare.slice(0, idx).trim();
-  return creator.length > 0 ? creator : null;
+  // Pattern 2: "Creator_Title" with underscores where first segment looks like a name
+  // Only match if the first segment has a space or capital letter pattern suggesting a name
+  const underscoreIdx = bare.indexOf("_");
+  if (underscoreIdx > 2) {
+    const candidate = bare.slice(0, underscoreIdx).trim();
+    // Accept if it contains a space (multi-word) or starts with upper + has lower (proper name)
+    if (candidate.includes(" ") || /^[A-Z][a-z]/.test(candidate)) {
+      return candidate;
+    }
+  }
+
+  return null;
+}
+
+/**
+ * Extract a creator name from a Telegram channel title.
+ * Strips common suffixes like "[Completed]", "(Paid)", dates, etc.
+ */
+export function extractCreatorFromChannelTitle(title: string): string | null {
+  let clean = title
+    // Remove bracketed suffixes: [Completed], [Open], [Closed], etc.
+    .replace(/\s*\[.*?\]\s*/g, " ")
+    // Remove parenthesized suffixes: (Paid), (partial upload...), etc.
+    .replace(/\s*\(.*?\)\s*/g, " ")
+    // Remove common emoji
+    .replace(/[\u{1F300}-\u{1FAFF}\u{2600}-\u{27BF}]/gu, "")
+    .trim();
+
+  // If there's a " - " separator, take the first part as creator
+  const dashIdx = clean.indexOf(" - ");
+  if (dashIdx > 0) {
+    clean = clean.slice(0, dashIdx).trim();
+  }
+
+  // Too generic or too short
+  if (clean.length < 2) return null;
+
+  // Skip overly generic channel names
+  const generic = [
+    "3d printing", "stl", "free stl", "stl zone", "stl forest", "stl all",
+    "marvel stl", "dc stl", "star wars stl", "pokemon stl",
+  ];
+  if (generic.includes(clean.toLowerCase())) return null;
+
+  return clean;
 }