Add admin settings page with seed data and limitations toggle

- Add settings handler with endpoints for:
  - GET/PUT /api/admin/settings (enable_limitations toggle)
  - POST /api/admin/settings/seed-lookups (run 001_lookups.sql)
  - POST /api/admin/settings/seed-test-data (run 002_test_data.sql)

- Add settings page to admin panel with:
  - Toggle switch to enable/disable subscription limitations
  - Button to seed lookup data (categories, priorities, etc.)
  - Button to seed test data (with warning for non-production use)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

internal/admin/handlers/settings_handler.go

@@ -0,0 +1,128 @@
+package handlers
+
+import (
+	"net/http"
+	"os"
+	"path/filepath"
+
+	"github.com/gin-gonic/gin"
+	"gorm.io/gorm"
+
+	"github.com/treytartt/mycrib-api/internal/models"
+)
+
+// AdminSettingsHandler handles system settings management
+type AdminSettingsHandler struct {
+	db *gorm.DB
+}
+
+// NewAdminSettingsHandler creates a new handler
+func NewAdminSettingsHandler(db *gorm.DB) *AdminSettingsHandler {
+	return &AdminSettingsHandler{db: db}
+}
+
+// SettingsResponse represents the settings response
+type SettingsResponse struct {
+	EnableLimitations bool `json:"enable_limitations"`
+}
+
+// GetSettings handles GET /api/admin/settings
+func (h *AdminSettingsHandler) GetSettings(c *gin.Context) {
+	var settings models.SubscriptionSettings
+	if err := h.db.First(&settings, 1).Error; err != nil {
+		if err == gorm.ErrRecordNotFound {
+			// Create default settings
+			settings = models.SubscriptionSettings{ID: 1, EnableLimitations: false}
+			h.db.Create(&settings)
+		} else {
+			c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to fetch settings"})
+			return
+		}
+	}
+
+	c.JSON(http.StatusOK, SettingsResponse{
+		EnableLimitations: settings.EnableLimitations,
+	})
+}
+
+// UpdateSettingsRequest represents the update request
+type UpdateSettingsRequest struct {
+	EnableLimitations *bool `json:"enable_limitations"`
+}
+
+// UpdateSettings handles PUT /api/admin/settings
+func (h *AdminSettingsHandler) UpdateSettings(c *gin.Context) {
+	var req UpdateSettingsRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+
+	var settings models.SubscriptionSettings
+	if err := h.db.First(&settings, 1).Error; err != nil {
+		if err == gorm.ErrRecordNotFound {
+			settings = models.SubscriptionSettings{ID: 1}
+		} else {
+			c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to fetch settings"})
+			return
+		}
+	}
+
+	if req.EnableLimitations != nil {
+		settings.EnableLimitations = *req.EnableLimitations
+	}
+
+	if err := h.db.Save(&settings).Error; err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to update settings"})
+		return
+	}
+
+	c.JSON(http.StatusOK, SettingsResponse{
+		EnableLimitations: settings.EnableLimitations,
+	})
+}
+
+// SeedLookups handles POST /api/admin/settings/seed-lookups
+func (h *AdminSettingsHandler) SeedLookups(c *gin.Context) {
+	if err := h.runSeedFile("001_lookups.sql"); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to seed lookups: " + err.Error()})
+		return
+	}
+
+	c.JSON(http.StatusOK, gin.H{"message": "Lookup data seeded successfully"})
+}
+
+// SeedTestData handles POST /api/admin/settings/seed-test-data
+func (h *AdminSettingsHandler) SeedTestData(c *gin.Context) {
+	if err := h.runSeedFile("002_test_data.sql"); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to seed test data: " + err.Error()})
+		return
+	}
+
+	c.JSON(http.StatusOK, gin.H{"message": "Test data seeded successfully"})
+}
+
+// runSeedFile executes a seed SQL file
+func (h *AdminSettingsHandler) runSeedFile(filename string) error {
+	// Check multiple possible locations
+	possiblePaths := []string{
+		filepath.Join("seeds", filename),
+		filepath.Join("./seeds", filename),
+		filepath.Join("/app/seeds", filename),
+	}
+
+	var sqlContent []byte
+	var err error
+	for _, path := range possiblePaths {
+		sqlContent, err = os.ReadFile(path)
+		if err == nil {
+			break
+		}
+	}
+
+	if err != nil {
+		return err
+	}
+
+	return h.db.Exec(string(sqlContent)).Error
+}

internal/admin/routes.go

@@ -249,6 +249,16 @@ func SetupRoutes(router *gin.Engine, db *gorm.DB, cfg *config.Config, deps *Depe
 				notifPrefs.DELETE("/:id", notifPrefsHandler.Delete)
 				notifPrefs.GET("/user/:user_id", notifPrefsHandler.GetByUser)
 			}
+
+			// System settings management
+			settingsHandler := handlers.NewAdminSettingsHandler(db)
+			settings := protected.Group("/settings")
+			{
+				settings.GET("", settingsHandler.GetSettings)
+				settings.PUT("", settingsHandler.UpdateSettings)
+				settings.POST("/seed-lookups", settingsHandler.SeedLookups)
+				settings.POST("/seed-test-data", settingsHandler.SeedTestData)
+			}
 		}
 	}