style(project): format Go with gofmt, set up Prettier for the frontend

Run gofmt -w across the backend, normalising the manually-aligned := blocks
to the gofmt standard. No code behaviour changes.

Add Prettier (+ prettier-plugin-svelte) to the frontend with the SvelteKit
default config (tabs, single quotes) so formatting is reproducible, then run
it over the whole tree. Add format / format:check npm scripts and a
.prettierignore (build output, generated schema.ts, static assets).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

backend/internal/handler/acl_handler.go

@@ -143,4 +143,4 @@ func (h *ACLHandler) SetPermissions(c *gin.Context) {
 		out[i] = toPermissionJSON(p)
 	}
 	respondJSON(c, http.StatusOK, out)
-}
+}

backend/internal/handler/audit_handler.go

@@ -117,4 +117,4 @@ func (h *AuditHandler) List(c *gin.Context) {
 		"offset": page.Offset,
 		"limit":  page.Limit,
 	})
-}
+}

backend/internal/handler/category_handler.go

@@ -232,4 +232,4 @@ func (h *CategoryHandler) ListTags(c *gin.Context) {
 		"offset": page.Offset,
 		"limit":  page.Limit,
 	})
-}
+}

backend/internal/handler/file_handler.go

@@ -89,16 +89,16 @@ type fileJSON struct {
 
 func toTagJSON(t domain.Tag) tagJSON {
 	j := tagJSON{
-		ID:          t.ID.String(),
-		Name:        t.Name,
-		Notes:       t.Notes,
-		Color:       t.Color,
+		ID:            t.ID.String(),
+		Name:          t.Name,
+		Notes:         t.Notes,
+		Color:         t.Color,
 		CategoryName:  t.CategoryName,
 		CategoryColor: t.CategoryColor,
-		CreatorID:   t.CreatorID,
-		CreatorName: t.CreatorName,
-		IsPublic:    t.IsPublic,
-		CreatedAt:   t.CreatedAt.Format(time.RFC3339),
+		CreatorID:     t.CreatorID,
+		CreatorName:   t.CreatorName,
+		IsPublic:      t.IsPublic,
+		CreatedAt:     t.CreatedAt.Format(time.RFC3339),
 	}
 	if t.CategoryID != nil {
 		s := t.CategoryID.String()
@@ -672,4 +672,4 @@ func parseUUIDs(strs []string) ([]uuid.UUID, error) {
 		ids = append(ids, id)
 	}
 	return ids, nil
-}
+}

backend/internal/handler/pool_handler.go

@@ -353,4 +353,4 @@ func (h *PoolHandler) Reorder(c *gin.Context) {
 		return
 	}
 	c.Status(http.StatusNoContent)
-}
+}

backend/internal/handler/tag_handler.go

@@ -106,11 +106,11 @@ func (h *TagHandler) List(c *gin.Context) {
 
 func (h *TagHandler) Create(c *gin.Context) {
 	var body struct {
-		Name       string   `json:"name"       binding:"required"`
-		Notes      *string  `json:"notes"`
-		Color      *string  `json:"color"`
-		CategoryID *string  `json:"category_id"`
-		IsPublic   *bool    `json:"is_public"`
+		Name       string  `json:"name"       binding:"required"`
+		Notes      *string `json:"notes"`
+		Color      *string `json:"color"`
+		CategoryID *string `json:"category_id"`
+		IsPublic   *bool   `json:"is_public"`
 	}
 	if err := c.ShouldBindJSON(&body); err != nil {
 		respondError(c, domain.ErrValidation)
@@ -549,4 +549,4 @@ func (h *TagHandler) FileRemoveTag(c *gin.Context) {
 // Helpers
 // ---------------------------------------------------------------------------
 
-func ptr(s string) *string { return &s }
+func ptr(s string) *string { return &s }

backend/internal/handler/user_handler.go

@@ -255,4 +255,4 @@ func (h *UserHandler) Delete(c *gin.Context) {
 		return
 	}
 	c.Status(http.StatusNoContent)
-}
+}