feat: add structured redirects and path prefix rewrite for proxy hosts

Adds two new UI-configurable Caddy patterns that previously required raw JSON:
- Per-path redirect rules (from/to/status) emitted as a subroute handler before
  auth so .well-known paths work without login; supports full URLs, cross-domain
  targets, and wildcard path patterns (e.g. /.well-known/*)
- Path prefix rewrite that prepends a segment to every request before proxying
  (e.g. /recipes → upstream sees /recipes/original/path)

Config is stored in the existing meta JSON column (no schema migration). Includes
integration tests for meta serialization and E2E functional tests against a real
Caddy instance covering relative/absolute destinations, all 3xx status codes, and
various wildcard combinations. Adds traefik/whoami to the test stack to verify
rewritten paths actually reach the upstream.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/components/proxy-hosts/HostDialogs.tsx

@@ -22,6 +22,8 @@ import { UpstreamInput } from "./UpstreamInput";
 import { GeoBlockFields } from "./GeoBlockFields";
 import { WafFields } from "./WafFields";
 import { MtlsFields } from "./MtlsConfig";
+import { RedirectsFields } from "./RedirectsFields";
+import { RewriteFields } from "./RewriteFields";
 import type { CaCertificate } from "@/src/lib/models/ca-certificates";
 
 export function CreateHostDialog({
@@ -108,6 +110,8 @@ export function CreateHostDialog({
                         </MenuItem>
                     ))}
                 </TextField>
+                <RedirectsFields initialData={initialData?.redirects} />
+                <RewriteFields initialData={initialData?.rewrite} />
                 <TextField
                     name="custom_pre_handlers_json"
                     label="Custom Pre-Handlers (JSON)"
@@ -212,6 +216,8 @@ export function EditHostDialog({
                         </MenuItem>
                     ))}
                 </TextField>
+                <RedirectsFields initialData={host.redirects} />
+                <RewriteFields initialData={host.rewrite} />
                 <TextField
                     name="custom_pre_handlers_json"
                     label="Custom Pre-Handlers (JSON)"