Scan Downloads, expand media extensions to AVIF/HEIF/WEBP/RAW/MKV etc

AndroidConnector:
- Add /storage/emulated/0/Download to scan list (flat dir, no subdirs)
- Expand mediaExtensions: AVIF, HEIF, WEBP, DNG/RAW/ARW/CR2/NEF/ORF,
  TIFF, BMP, MPEG/MPG, M4V, MKV, WEBM, 3G2
- Update video detection set to match

ExifFilter: remove 'download' from excluded fragments so Downloads
folder shows in the Other section rather than being hidden.

src/main/kotlin/com/bolenpad/photophetch/device/AndroidConnector.kt

@@ -31,10 +31,25 @@ class AndroidConnector(
         "/storage/emulated/0/Pictures/Camera",
     )
 
-    // Photo/video extensions to include
+    // Photo/video extensions to include — covers all common camera and download formats
     private val mediaExtensions = setOf(
-        "jpg", "jpeg", "png", "dng", "raw",  // photos
-        "mp4", "mov", "3gp", "avi",           // videos
+        // Photos
+        "jpg", "jpeg",
+        "heic", "heif",
+        "avif",
+        "webp",
+        "png",
+        "dng", "raw", "arw", "cr2", "cr3", "nef", "orf", "rw2",
+        "tiff", "tif",
+        "bmp",
+        // Videos
+        "mp4", "m4v",
+        "mov",
+        "mpeg", "mpg", "mpe",
+        "3gp", "3g2",
+        "avi",
+        "mkv",
+        "webm",
     )
 
     override suspend fun detectDevices(): List<DeviceInfo> {
@@ -70,7 +85,7 @@ class AndroidConnector(
         val serial = requireSerial(device)
         val photos = mutableListOf<PhonePhoto>()
 
-        // Scan all subdirectories under DCIM and Pictures.
+        // Scan all subdirectories under DCIM and Pictures, plus Downloads root.
         // /sdcard is a symlink to /storage/emulated/0 — scan only the canonical path.
         val scanRoots = listOf(
             "/storage/emulated/0/DCIM",
@@ -87,6 +102,9 @@ class AndroidConnector(
                 .forEach { subdir -> cameraDirs.add("$root/$subdir") }
         }
 
+        // Downloads is a flat directory (no subdirs worth scanning), add it directly
+        cameraDirs.add("/storage/emulated/0/Download")
+
         // Fall back to hardcoded list if dynamic discovery found nothing
         val dirsToScan = cameraDirs.ifEmpty { fallbackCameraDirs }
 
@@ -121,7 +139,7 @@ class AndroidConnector(
                         dateTaken = dateTaken,
                         exifMake = device.displayName,
                         exifModel = device.displayName,
-                        mediaType = if (ext in setOf("mp4", "mov", "3gp", "avi"))
+                        mediaType = if (ext in setOf("mp4", "m4v", "mov", "mpeg", "mpg", "mpe", "3gp", "3g2", "avi", "mkv", "webm"))
                             MediaType.VIDEO else MediaType.PHOTO,
                         sourceFolder = folderName,
                     )

src/main/kotlin/com/bolenpad/photophetch/util/ExifFilter.kt

@@ -35,7 +35,6 @@ object ExifFilter {
         "signal",
         "viber",
         "received",
-        "download",
         "snapchat",
         "instagram",
         "twitter",