Web UI improvements: REJECT filtering and accurate cache statistics

[Vitaliy86]

Hello, I would like to suggest two improvements for the DNSCrypt‑Proxy Web UI (port 8080) used on a high-load system.

1. REJECT filtering / separate view
   Currently, all DNS queries (PASS + REJECT) are displayed in one table.
   With large blocklists, REJECT entries flood the view and make it difficult to monitor new or allowed (PASS) queries.
   Proposed improvements:

Add filter buttons: “ALL”, “PASS only”, “REJECT only”.

Option to hide REJECT entries by default.

Optionally split into separate tabs: “Allowed” / “Blocked”.

2. Cache statistics accuracy
   The Web UI currently includes all queries when calculating cache hit ratio.
   However, blocked (REJECT) queries are never cached, so including them inflates/misrepresents cache statistics.
   Proposed improvement:

Only successfully resolved queries (PASS) should contribute to cache hits/misses.

Benefits:

Improved real-time monitoring of allowed queries.

Accurate cache efficiency statistics, especially important with heavy blocklists.