feat(server/m7-381): admin scan-status + manual trigger endpoints

Adds GET /api/admin/scan/status and POST /api/admin/scan/run under the
existing RequireAdmin middleware block; plumbs *library.Scanner and
library.RunScanConfig through api.Mount, server.New, and main.go so the
manual trigger reuses the same RunScan orchestrator as startup scans.

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

internal/server/server.go

@@ -72,10 +72,12 @@ type Server struct {
 	BrandingCfg         config.BrandingConfig
 	CoverEnricher       *coverart.Enricher
 	CoverArtBackfillCap int
+	LibraryScanner      *library.Scanner
+	ScanCfg             library.RunScanConfig
 }
 
-func New(logger *slog.Logger, pool *pgxpool.Pool, scanner ScanTrigger, subCfg subsonic.Config, eventsCfg config.EventsConfig, recCfg config.RecommendationConfig, dataDir string, brandingCfg config.BrandingConfig, coverEnricher *coverart.Enricher, coverArtBackfillCap int) *Server {
-	return &Server{Logger: logger, Pool: pool, Scanner: scanner, SubsonicCfg: subCfg, EventsCfg: eventsCfg, RecommendationCfg: recCfg, DataDir: dataDir, BrandingCfg: brandingCfg, CoverEnricher: coverEnricher, CoverArtBackfillCap: coverArtBackfillCap}
+func New(logger *slog.Logger, pool *pgxpool.Pool, scanner ScanTrigger, subCfg subsonic.Config, eventsCfg config.EventsConfig, recCfg config.RecommendationConfig, dataDir string, brandingCfg config.BrandingConfig, coverEnricher *coverart.Enricher, coverArtBackfillCap int, libraryScanner *library.Scanner, scanCfg library.RunScanConfig) *Server {
+	return &Server{Logger: logger, Pool: pool, Scanner: scanner, SubsonicCfg: subCfg, EventsCfg: eventsCfg, RecommendationCfg: recCfg, DataDir: dataDir, BrandingCfg: brandingCfg, CoverEnricher: coverEnricher, CoverArtBackfillCap: coverArtBackfillCap, LibraryScanner: libraryScanner, ScanCfg: scanCfg}
 }
 
 func (s *Server) Router() http.Handler {
@@ -109,7 +111,7 @@ func (s *Server) Router() http.Handler {
 		lidarrQuar := lidarrquarantine.NewService(s.Pool, lidarrCfg, lidarrClientFn)
 		tracksSvc := tracks.NewService(s.Pool, s.Logger, lidarrUnmonitorAdapter{fn: lidarrClientFn})
 		playlistsSvc := playlists.NewService(s.Pool, s.Logger, s.DataDir)
-		api.Mount(r, s.Pool, s.Logger, writer, s.RecommendationCfg, lidarrCfg, lidarrReqs, lidarrQuar, tracksSvc, playlistsSvc, s.CoverEnricher, s.CoverArtBackfillCap, s.DataDir)
+		api.Mount(r, s.Pool, s.Logger, writer, s.RecommendationCfg, lidarrCfg, lidarrReqs, lidarrQuar, tracksSvc, playlistsSvc, s.CoverEnricher, s.CoverArtBackfillCap, s.LibraryScanner, s.ScanCfg, s.DataDir)
 		// /api/admin/scan is the only admin route owned by the server package
 		// (it needs the Scanner). Register it as a single inline-middleware
 		// route — using r.Route("/api/admin", ...) here would create a second

internal/server/server_test.go

@@ -24,7 +24,7 @@ import (
 )
 
 func TestHealthz(t *testing.T) {
-	s := New(slog.New(slog.NewTextHandler(io.Discard, nil)), nil, nil, subsonic.Config{}, config.EventsConfig{}, config.RecommendationConfig{}, "", config.BrandingConfig{}, nil, 0)
+	s := New(slog.New(slog.NewTextHandler(io.Discard, nil)), nil, nil, subsonic.Config{}, config.EventsConfig{}, config.RecommendationConfig{}, "", config.BrandingConfig{}, nil, 0, nil, library.RunScanConfig{})
 	ts := httptest.NewServer(s.Router())
 	defer ts.Close()
 
@@ -73,7 +73,7 @@ func TestHealthz_IncludesMinClientVersion(t *testing.T) {
 }
 
 func TestRouter_ServesSPAAtRoot(t *testing.T) {
-	s := New(slog.New(slog.NewTextHandler(io.Discard, nil)), nil, nil, subsonic.Config{}, config.EventsConfig{}, config.RecommendationConfig{}, "", config.BrandingConfig{}, nil, 0)
+	s := New(slog.New(slog.NewTextHandler(io.Discard, nil)), nil, nil, subsonic.Config{}, config.EventsConfig{}, config.RecommendationConfig{}, "", config.BrandingConfig{}, nil, 0, nil, library.RunScanConfig{})
 	ts := httptest.NewServer(s.Router())
 	defer ts.Close()
 
@@ -92,7 +92,7 @@ func TestRouter_ServesSPAAtRoot(t *testing.T) {
 }
 
 func TestRouter_DeepLinkFallbackReturnsSPA(t *testing.T) {
-	s := New(slog.New(slog.NewTextHandler(io.Discard, nil)), nil, nil, subsonic.Config{}, config.EventsConfig{}, config.RecommendationConfig{}, "", config.BrandingConfig{}, nil, 0)
+	s := New(slog.New(slog.NewTextHandler(io.Discard, nil)), nil, nil, subsonic.Config{}, config.EventsConfig{}, config.RecommendationConfig{}, "", config.BrandingConfig{}, nil, 0, nil, library.RunScanConfig{})
 	ts := httptest.NewServer(s.Router())
 	defer ts.Close()
 
@@ -111,7 +111,7 @@ func TestRouter_DeepLinkFallbackReturnsSPA(t *testing.T) {
 }
 
 func TestRouter_APIPathNotSwallowedBySPA(t *testing.T) {
-	s := New(slog.New(slog.NewTextHandler(io.Discard, nil)), nil, nil, subsonic.Config{}, config.EventsConfig{}, config.RecommendationConfig{}, "", config.BrandingConfig{}, nil, 0)
+	s := New(slog.New(slog.NewTextHandler(io.Discard, nil)), nil, nil, subsonic.Config{}, config.EventsConfig{}, config.RecommendationConfig{}, "", config.BrandingConfig{}, nil, 0, nil, library.RunScanConfig{})
 	ts := httptest.NewServer(s.Router())
 	defer ts.Close()
 
@@ -130,7 +130,7 @@ func TestRouter_APIPathNotSwallowedBySPA(t *testing.T) {
 }
 
 func TestRouter_RestPathNotSwallowedBySPA(t *testing.T) {
-	s := New(slog.New(slog.NewTextHandler(io.Discard, nil)), nil, nil, subsonic.Config{}, config.EventsConfig{}, config.RecommendationConfig{}, "", config.BrandingConfig{}, nil, 0)
+	s := New(slog.New(slog.NewTextHandler(io.Discard, nil)), nil, nil, subsonic.Config{}, config.EventsConfig{}, config.RecommendationConfig{}, "", config.BrandingConfig{}, nil, 0, nil, library.RunScanConfig{})
 	ts := httptest.NewServer(s.Router())
 	defer ts.Close()
 
@@ -206,7 +206,7 @@ func TestRouter_AdminSubtreeNotShadowed(t *testing.T) {
 	}
 
 	s := New(slog.New(slog.NewTextHandler(io.Discard, nil)), pool,
-		stubScanner{}, subsonic.Config{}, config.EventsConfig{}, config.RecommendationConfig{}, "", config.BrandingConfig{}, nil, 0)
+		stubScanner{}, subsonic.Config{}, config.EventsConfig{}, config.RecommendationConfig{}, "", config.BrandingConfig{}, nil, 0, nil, library.RunScanConfig{})
 	ts := httptest.NewServer(s.Router())
 	defer ts.Close()