feat(api): add /api/requests user-facing CRUD

Implements POST/GET/GET:id/DELETE /api/requests handlers delegating to
lidarrrequests.Service; wires routes in RequireUser group and threads
the service through Mount and server.go.

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

internal/api/api.go

@@ -14,15 +14,16 @@ import (
 	"git.fabledsword.com/bvandeusen/minstrel/internal/auth"
 	"git.fabledsword.com/bvandeusen/minstrel/internal/config"
 	"git.fabledsword.com/bvandeusen/minstrel/internal/lidarrconfig"
+	"git.fabledsword.com/bvandeusen/minstrel/internal/lidarrrequests"
 	"git.fabledsword.com/bvandeusen/minstrel/internal/playevents"
 )
 
 // Mount attaches /api/* handlers to r. Public endpoints (login) are outside
 // RequireUser; everything else is gated by the middleware. The events writer
 // is shared with the Subsonic mount so /rest/scrobble feeds the same store.
-func Mount(r chi.Router, pool *pgxpool.Pool, logger *slog.Logger, events *playevents.Writer, recCfg config.RecommendationConfig, lidarrCfg *lidarrconfig.Service) {
+func Mount(r chi.Router, pool *pgxpool.Pool, logger *slog.Logger, events *playevents.Writer, recCfg config.RecommendationConfig, lidarrCfg *lidarrconfig.Service, lidarrReqs *lidarrrequests.Service) {
 	rng := rand.New(rand.NewSource(rand.Int63()))
-	h := &handlers{pool: pool, logger: logger, events: events, recCfg: recCfg, rng: rng.Float64, lidarrCfg: lidarrCfg}
+	h := &handlers{pool: pool, logger: logger, events: events, recCfg: recCfg, rng: rng.Float64, lidarrCfg: lidarrCfg, lidarrRequests: lidarrReqs}
 
 	r.Route("/api", func(api chi.Router) {
 		api.Post("/auth/login", h.handleLogin)
@@ -54,15 +55,21 @@ func Mount(r chi.Router, pool *pgxpool.Pool, logger *slog.Logger, events *playev
 			authed.Get("/likes/ids", h.handleGetLikedIDs)
 
 			authed.Get("/lidarr/search", h.handleLidarrSearch)
+
+			authed.Post("/requests", h.handleCreateRequest)
+			authed.Get("/requests", h.handleListRequests)
+			authed.Get("/requests/{id}", h.handleGetRequest)
+			authed.Delete("/requests/{id}", h.handleCancelRequest)
 		})
 	})
 }
 
 type handlers struct {
-	pool      *pgxpool.Pool
-	logger    *slog.Logger
-	events    *playevents.Writer
-	recCfg    config.RecommendationConfig
-	rng       func() float64
-	lidarrCfg *lidarrconfig.Service
+	pool           *pgxpool.Pool
+	logger         *slog.Logger
+	events         *playevents.Writer
+	recCfg         config.RecommendationConfig
+	rng            func() float64
+	lidarrCfg      *lidarrconfig.Service
+	lidarrRequests *lidarrrequests.Service
 }