fix: FilesView filter logic - remove 'registered_scan' status

Bug: Scan files were getting status 'registered_scan' which doesn't match
any filter value (unregistered/pending/processing/completed/indexed/unindexed).
When toggling filters on/off, files would disappear because their status
didn't match any valid filter.

Fix:
- Removed 'registered_scan' status entirely
- Fetch regFiles FIRST to get real statuses
- Scan files default to 'unregistered' status
- regFiles overlay with actual status (pending/processing/completed)
- Increased regFiles page_size to 200 for larger libraries

portal/src/views/FilesView.vue

@@ -262,50 +262,53 @@ async function fetchFiles() {
   loading.value = true
   try {
     const config = getCurrentConfig()
-    const scanResp = await httpFetch<any>(`${config.api_base_url}/api/v1/files/scan`)
-    const scanFiles: any[] = (scanResp?.files || []).map((f: any) => {
-      const mediaType = getMediaType(f.file_name)
-      return {
-        ...f,
-        media_type: mediaType,
-        status: f.is_registered ? 'registered_scan' : 'unregistered',
-        is_indexed: false
-      }
-    })
-
-    // Get registered files with real processing status
+    
+    // Get registered files with real processing status FIRST
     let regFiles: any[] = []
     try {
-      const regResp = await httpFetch<any>(`${config.api_base_url}/api/v1/files?page=1&page_size=100`)
+      const regResp = await httpFetch<any>(`${config.api_base_url}/api/v1/files?page=1&page_size=200`)
       regFiles = (regResp?.files || regResp?.data || []).map((f: any) => {
         const mediaType = getMediaType(f.file_name)
         return {
           ...f,
           media_type: mediaType,
           status: f.status || 'pending',
-          is_indexed: f.total_chunks > 0 || false
+          is_indexed: (f.total_chunks || 0) > 0
         }
       })
     } catch {
-      // Registered files API may not be available; use scan data only
+      // Registered files API may not be available
     }
 
-    // Merge: scan results first, then overlay with registered statuses
-    const merged = new Map<string, any>()
-    for (const f of scanFiles) {
-      merged.set(f.file_path, f)
-    }
-    for (const f of regFiles) {
-      // Preserve media_type from scan if not set in regFiles
-      const existing = merged.get(f.file_path)
-      if (existing) {
-        merged.set(f.file_path, {
-          ...f,
-          media_type: f.media_type || existing.media_type
-        })
-      } else {
-        merged.set(f.file_path, f)
+    // Get scan results
+    const scanResp = await httpFetch<any>(`${config.api_base_url}/api/v1/files/scan`)
+    const scanFiles: any[] = (scanResp?.files || []).map((f: any) => {
+      const mediaType = getMediaType(f.file_name)
+      return {
+        ...f,
+        media_type: mediaType,
+        is_indexed: false
       }
+    })
+
+    // Build a set of registered file paths for quick lookup
+    const registeredPaths = new Set(regFiles.map(f => f.file_path))
+
+    // Merge: start with scan results, override with registered data where available
+    const merged = new Map<string, any>()
+    
+    // First pass: add all scan results
+    for (const f of scanFiles) {
+      const isRegistered = registeredPaths.has(f.file_path)
+      merged.set(f.file_path, {
+        ...f,
+        status: isRegistered ? 'pending' : 'unregistered'
+      })
+    }
+    
+    // Second pass: override with real registered data
+    for (const f of regFiles) {
+      merged.set(f.file_path, f)
     }
 
     files.value = Array.from(merged.values())