Add anikoto backup downloader

- add a config toggle for backup downloads and retry failed ani-cli jobs with anikoto-cli
- install anikoto-cli systemwide in the container with its required dependencies
- bump the project version to 0.46.1 and publish the release notes

http_handler.py

@@ -20,6 +20,7 @@ from pathlib import Path
 from urllib.parse import parse_qs, unquote, urlencode, urlparse, urlunparse
 
 from app_support import (
+    ANIKOTO_CLI,
     ANI_CLI,
     APP_NAME,
     CHANGELOG_FILE,
@@ -85,9 +86,10 @@ def build_handler_class(context):
 
 
 def dependency_status():
-    checks = ["curl", "sed", "grep", "openssl", "fzf", "aria2c", "ffmpeg", "yt-dlp"]
+    checks = ["curl", "sed", "grep", "openssl", "fzf", "aria2c", "ffmpeg", "yt-dlp", "jq", "mpv"]
     result = {name: bool(shutil.which(name)) for name in checks}
     result["ani-cli"] = bool(shutil.which(ANI_CLI) or (Path(ANI_CLI).exists() and os.access(ANI_CLI, os.X_OK)))
+    result["anikoto-cli"] = bool(shutil.which(ANIKOTO_CLI) or (Path(ANIKOTO_CLI).exists() and os.access(ANIKOTO_CLI, os.X_OK)))
     return result
 
 
@@ -166,6 +168,22 @@ def installed_ani_cli_version():
     return version or "Unavailable"
 
 
+@lru_cache(maxsize=1)
+def installed_anikoto_cli_version():
+    try:
+        completed = subprocess.run(
+            [ANIKOTO_CLI, "--version"],
+            check=True,
+            capture_output=True,
+            text=True,
+            timeout=6,
+        )
+    except (OSError, subprocess.SubprocessError):
+        return "Unavailable"
+    version = str(completed.stdout or completed.stderr or "").strip()
+    return version or "Unavailable"
+
+
 class Handler(BaseHTTPRequestHandler):
     server_version = "AniCliWeb/1.0"
     remote_session_cookie_name = "ani_cli_web_session"
@@ -535,7 +553,14 @@ class Handler(BaseHTTPRequestHandler):
             elif parsed.path == "/api/config":
                 self.json(sanitize_public_config(Handler._context(self).get_config_snapshot()))
             elif parsed.path == "/api/version":
-                self.json({"name": APP_NAME, "version": VERSION, "ani_cli_version": installed_ani_cli_version()})
+                self.json(
+                    {
+                        "name": APP_NAME,
+                        "version": VERSION,
+                        "ani_cli_version": installed_ani_cli_version(),
+                        "anikoto_cli_version": installed_anikoto_cli_version(),
+                    }
+                )
             elif parsed.path == "/api/changelog":
                 self.json({"content": load_project_text_file(CHANGELOG_FILE, default="Changelog unavailable.")})
             elif parsed.path == "/api/dependencies":