stabilization: server.go split + i18n templates + frontend localization

cmd/verstak-server/server.go (2838→127 строк): разделён на 12 файлов
- config.go, tokens.go, schema.go
- server.go (только struct + NewServer + ListenAndServe)
- routes.go, middleware.go, smtp.go
- handlers_api.go, handlers_user.go, handlers_web_user.go, handlers_admin.go
- templates.go (конвертирован в функции с i18n.T())

frontend: все русские строки заменены на t() вызовы
- App.svelte, FileTreeRow.svelte, ConfirmModal.svelte
- FilePreviewModal.svelte, fileUtils.js

core: gofmt по всему проекту

Все сборки (CLI, server, gui, frontend), go vet, go test проходят.
check-i18n.sh: frontend чист, Go-файлы с кириллицей — только тесты/легаси.

internal/core/sync/client.go

@@ -29,7 +29,7 @@ func NewClient(serverURL, apiKey, deviceID, vaultRoot string) *Client {
 		APIKey:    apiKey,
 		DeviceID:  deviceID,
 		VaultRoot: vaultRoot,
-		HTTP: &http.Client{Timeout: 30 * time.Second},
+		HTTP:      &http.Client{Timeout: 30 * time.Second},
 	}
 }
 
@@ -145,9 +145,9 @@ func (c *Client) TestAuth(serverURL, username, password string) error {
 
 // PushRequest is the payload for POST /sync/push.
 type PushRequest struct {
-	DeviceID      string   `json:"device_id"`
-	IdempotencyKey string  `json:"idempotency_key,omitempty"`
-	Ops           []PushOp `json:"ops"`
+	DeviceID       string   `json:"device_id"`
+	IdempotencyKey string   `json:"idempotency_key,omitempty"`
+	Ops            []PushOp `json:"ops"`
 }
 
 // PushOp is a single operation in a push request.
@@ -164,8 +164,8 @@ type PushOp struct {
 
 // PushResponse is the response from POST /sync/push.
 type PushResponse struct {
-	Accepted  []string               `json:"accepted"`
-	Count     int                    `json:"count"`
+	Accepted  []string                 `json:"accepted"`
+	Count     int                      `json:"count"`
 	Conflicts []map[string]interface{} `json:"conflicts"`
 }
 

internal/core/sync/sync.go

@@ -30,18 +30,18 @@ const (
 
 // Op represents a sync operation.
 type Op struct {
-	ID                string   `json:"id"`
-	OpID              string   `json:"op_id"`
-	ServerSequence    int      `json:"server_sequence,omitempty"`
-	DeviceID          string   `json:"device_id,omitempty"`
-	EntityType        string   `json:"entity_type"`
-	EntityID          string   `json:"entity_id"`
-	OpType            string   `json:"op_type"`
-	PayloadJSON       string   `json:"payload_json"`
-	CreatedAt         string   `json:"created_at"`
-	PushedAt          *string  `json:"pushed_at,omitempty"`
-	ClientSequence    int      `json:"client_sequence,omitempty"`
-	LastSeenServerSeq int      `json:"last_seen_server_seq,omitempty"`
+	ID                string  `json:"id"`
+	OpID              string  `json:"op_id"`
+	ServerSequence    int     `json:"server_sequence,omitempty"`
+	DeviceID          string  `json:"device_id,omitempty"`
+	EntityType        string  `json:"entity_type"`
+	EntityID          string  `json:"entity_id"`
+	OpType            string  `json:"op_type"`
+	PayloadJSON       string  `json:"payload_json"`
+	CreatedAt         string  `json:"created_at"`
+	PushedAt          *string `json:"pushed_at,omitempty"`
+	ClientSequence    int     `json:"client_sequence,omitempty"`
+	LastSeenServerSeq int     `json:"last_seen_server_seq,omitempty"`
 }
 
 // Service records and manages sync operations.

internal/core/sync/sync_e2e_test.go

@@ -132,16 +132,16 @@ func TestE2ESync(t *testing.T) {
 		"device_id": deviceIDA,
 		"ops": []map[string]interface{}{
 			{
-				"op_id":              "op-node-create-001",
-				"entity_type":        "node",
-				"entity_id":          nodeID,
-				"op_type":            "create",
+				"op_id":       "op-node-create-001",
+				"entity_type": "node",
+				"entity_id":   nodeID,
+				"op_type":     "create",
 				"payload_json": fmt.Sprintf(
 					`{"id":"%s","parent_id":"","type":"case","title":"Test Project","slug":"test-project","section":"projects","created_at":"%s","updated_at":"%s"}`,
 					nodeID, now, now),
-				"client_sequence":    1,
+				"client_sequence":      1,
 				"last_seen_server_seq": 0,
-				"created_at":         now,
+				"created_at":           now,
 			},
 		},
 		"idempotency_key": "e2e-test-push-1",
@@ -161,7 +161,7 @@ func TestE2ESync(t *testing.T) {
 		t.Fatalf("push A status %d: %s", resp.StatusCode, string(body))
 	}
 	var pushRespA struct {
-		Accepted  []string `json:"accepted"`
+		Accepted  []string      `json:"accepted"`
 		Conflicts []interface{} `json:"conflicts"`
 	}
 	json.NewDecoder(resp.Body).Decode(&pushRespA)