fix(management): reload plugins asynchronously after changes

internal/api/handlers/management/plugin_store.go

@@ -274,7 +274,7 @@ func (h *Handler) installPluginFromStore(c *gin.Context, goos, goarch string) {
 	reloadCfg := h.cfg
 	h.mu.Unlock()
 
-	h.reloadConfigAfterManagementSave(c.Request.Context(), reloadCfg)
+	h.reloadConfigAfterManagementSaveAsync(c.Request.Context(), reloadCfg)
 	log.WithFields(log.Fields{
 		"plugin_id":   result.ID,
 		"source_id":   source.ID,

internal/api/handlers/management/plugin_store_test.go

@@ -511,12 +511,9 @@ func TestInstallPluginFromStoreOverwritesFilePreservesConfigAndReloads(t *testin
 			"https://downloads.example/checksums.txt":  []byte(hex.EncodeToString(checksum[:]) + "  " + archiveName + "\n"),
 		},
 	}
-	reloads := 0
+	reloads := make(chan *config.Config, 1)
 	h.SetConfigReloadHook(func(_ context.Context, cfg *config.Config) {
-		reloads++
-		if cfg != h.cfg {
-			t.Fatalf("reload config = %p, want handler config %p", cfg, h.cfg)
-		}
+		reloads <- cfg
 	})
 
 	rec := httptest.NewRecorder()
@@ -529,8 +526,8 @@ func TestInstallPluginFromStoreOverwritesFilePreservesConfigAndReloads(t *testin
 	if rec.Code != http.StatusOK {
 		t.Fatalf("status = %d, want %d; body=%s", rec.Code, http.StatusOK, rec.Body.String())
 	}
-	if reloads != 1 {
-		t.Fatalf("reloads = %d, want 1", reloads)
+	if cfg := waitForAsyncReload(t, reloads); cfg != h.cfg {
+		t.Fatalf("reload config = %p, want handler config %p", cfg, h.cfg)
 	}
 	data, errRead := os.ReadFile(existingPath)
 	if errRead != nil {

internal/api/handlers/management/plugins.go

@@ -215,18 +215,27 @@ func (h *Handler) PatchPluginEnabled(c *gin.Context) {
 	}
 
 	h.mu.Lock()
-	defer h.mu.Unlock()
 	ensurePluginConfigMap(h.cfg)
 	item := h.cfg.Plugins.Configs[id]
 	node := pluginConfigNode(item)
 	setYAMLMappingValue(node, "enabled", boolYAMLNode(*body.Enabled))
 	updated, errConfig := pluginInstanceConfigFromNode(node)
 	if errConfig != nil {
+		h.mu.Unlock()
 		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid_config", "message": errConfig.Error()})
 		return
 	}
 	h.cfg.Plugins.Configs[id] = updated
-	h.persistLocked(c)
+	if errSave := config.SaveConfigPreserveComments(h.configFilePath, h.cfg); errSave != nil {
+		h.mu.Unlock()
+		c.JSON(http.StatusInternalServerError, gin.H{"error": fmt.Sprintf("failed to save config: %v", errSave)})
+		return
+	}
+	reloadCfg := h.cfg
+	h.mu.Unlock()
+
+	h.reloadConfigAfterManagementSaveAsync(c.Request.Context(), reloadCfg)
+	c.JSON(http.StatusOK, gin.H{"status": "ok"})
 }
 
 // PutPluginConfig replaces plugins.configs.<id> with the request object.

internal/api/handlers/management/plugins_test.go

@@ -241,6 +241,10 @@ func TestPatchPluginEnabledUpdatesOnlyPluginConfig(t *testing.T) {
 		},
 		configFilePath: writeTestConfigFile(t),
 	}
+	reloads := make(chan *config.Config, 1)
+	h.SetConfigReloadHook(func(_ context.Context, cfg *config.Config) {
+		reloads <- cfg
+	})
 
 	rec := httptest.NewRecorder()
 	c, _ := gin.CreateTestContext(rec)
@@ -253,6 +257,9 @@ func TestPatchPluginEnabledUpdatesOnlyPluginConfig(t *testing.T) {
 	if rec.Code != http.StatusOK {
 		t.Fatalf("status = %d, want %d; body=%s", rec.Code, http.StatusOK, rec.Body.String())
 	}
+	if cfg := waitForAsyncReload(t, reloads); cfg != h.cfg {
+		t.Fatalf("reload config = %p, want handler config %p", cfg, h.cfg)
+	}
 	if h.cfg.Plugins.Enabled {
 		t.Fatal("global Plugins.Enabled changed to true")
 	}