fix(outbound): fill encryption and pqv when importing VLESS link

The link-to-JSON importer dropped two VLESS Reality fields:

- pqv (post-quantum ML-DSA-65 verify key) was never parsed; map it back
  to realitySettings.mldsa65Verify, matching the inbound link generator.
- encryption was force-reset to 'none' in the form adapter regardless of
  the parsed value, discarding post-quantum encryption strings.

Add regression tests for both paths.

frontend/src/lib/xray/outbound-form-adapter.ts

@@ -123,7 +123,7 @@ function vlessFromWire(raw: Raw): VlessOutboundFormSettings {
     port,
     id,
     flow,
-    encryption: (encryption === 'none' ? 'none' : 'none') as 'none',
+    encryption: encryption || 'none',
     reverseTag,
     reverseSniffing,
     testpre: asNumber(raw.testpre, 0),

frontend/src/lib/xray/outbound-link-parser.ts

@@ -210,6 +210,7 @@ function applySecurityParams(stream: Raw, params: URLSearchParams): void {
     reality.publicKey = params.get('pbk') ?? '';
     reality.shortId = params.get('sid') ?? '';
     reality.spiderX = params.get('spx') ?? '';
+    reality.mldsa65Verify = params.get('pqv') ?? '';
   }
 }