refactor(scenario): remove step type and simplify scheduler to exec-only

- remove StepType, type column, and type field from step entity and DTOs
- remove executeLoginStep, executeSignStep, executeExecStep from scheduler
- inline exec logic directly in executeStepRun; all steps run execCode
- remove AuthService, EnvironmentService, runEnvironments from scheduler
- remove type selector from CreateStepPage and EditStepPage
- remove type badge column from ScenarioDetailPage
- fix useEffect dependency arrays in RunDetailPage (FINAL, id, runId, polling)
- fix duplicate /snippets proxy key in vite.config.ts
- remove unused escapeHtml export from hljs.ts

client/src/api/client.ts

@@ -83,7 +83,10 @@ export const snippets = {
       body: JSON.stringify(payload),
     });
   },
-  update(id: string, patch: Partial<Pick<Snippet, 'name' | 'description' | 'code'>>): Promise<Snippet> {
+  update(
+    id: string,
+    patch: Partial<Pick<Snippet, 'name' | 'description' | 'code'>>,
+  ): Promise<Snippet> {
     return request(`/snippets/${id}`, {
       method: 'PATCH',
       body: JSON.stringify(patch),
@@ -184,7 +187,11 @@ export const scenarios = {
   waitForRun(scenarioId: string, runId: string): Promise<ScenarioRunDetail> {
     return request(`/scenarios/${scenarioId}/run/${runId}/wait`, { method: 'POST' });
   },
-  listRuns(scenarioId: string, page = 1, limit = 20): Promise<PaginatedResponse<ScenarioRun & { stepRuns: ScenarioRunStep[] }>> {
+  listRuns(
+    scenarioId: string,
+    page = 1,
+    limit = 20,
+  ): Promise<PaginatedResponse<ScenarioRun & { stepRuns: ScenarioRunStep[] }>> {
     return request(`/scenarios/${scenarioId}/runs?page=${page}&limit=${limit}`);
   },
   exportScenario(id: string): Promise<unknown> {
@@ -201,12 +208,24 @@ export const scenarios = {
 // ── Runs ─────────────────────────────────────────────────────────────────────
 
 export const runs = {
-  listAll(page = 1, limit = 20, status?: string): Promise<PaginatedResponse<ScenarioRun & { stepRuns: ScenarioRunStep[]; scenario: { id: string; name: string } }>> {
+  listAll(
+    page = 1,
+    limit = 20,
+    status?: string,
+  ): Promise<
+    PaginatedResponse<
+      ScenarioRun & { stepRuns: ScenarioRunStep[]; scenario: { id: string; name: string } }
+    >
+  > {
     const q = new URLSearchParams({ page: String(page), limit: String(limit) });
     if (status) q.set('status', status);
     return request(`/scenarios/runs?${q}`);
   },
-  list(scenarioId: string, page = 1, limit = 20): Promise<PaginatedResponse<ScenarioRun & { stepRuns: ScenarioRunStep[] }>> {
+  list(
+    scenarioId: string,
+    page = 1,
+    limit = 20,
+  ): Promise<PaginatedResponse<ScenarioRun & { stepRuns: ScenarioRunStep[] }>> {
     return request(`/scenarios/${scenarioId}/runs?page=${page}&limit=${limit}`);
   },
   get(scenarioId: string, runId: string, q?: string): Promise<ScenarioRunDetail> {
@@ -238,7 +257,6 @@ export const scenarioCredentials = {
 export interface CreateStepPayload {
   title?: string;
   order: number;
-  type: 'login' | 'exec' | 'sign';
   execCode?: string;
   validateCode?: string;
 }
@@ -246,7 +264,6 @@ export interface CreateStepPayload {
 export interface UpdateStepPayload {
   title?: string;
   order?: number;
-  type?: 'login' | 'exec' | 'sign';
   execCode?: string;
   validateCode?: string;
 }

client/src/api/types.ts

@@ -68,13 +68,10 @@ export interface Session {
 
 // ── Scenarios ─────────────────────────────────────────────────────────────────
 
-export type StepType = 'login' | 'exec' | 'sign';
-
 export interface ScenarioStep {
   id: string;
   scenarioId: string;
   order: number;
-  type: StepType;
   title: string | null;
   sessionName: string | null;
   execCode: string | null;