fix(workflows): resolve cold-start deadlock on direct URL navigation

loadWorkflowState used hydration.workspaceId (null on cold start) to
look up the RQ cache, causing "Workflow not found" even when the
workflow exists in the DB. Now falls back to getWorkspaceIdFromUrl()
and skips the cache guard when the cache is empty (letting the API
fetch proceed).

Also removes the redundant isRegistryReady guard in workflow.tsx that
blocked setActiveWorkflow when hydration.workspaceId was null.

Author: waleedlatif1

apps/sim/app/workspace/[workspaceId]/w/[workflowId]/workflow.tsx

@@ -2200,16 +2200,11 @@ const WorkflowContent = React.memo(
       if (sandbox) return
 
       const currentId = workflowIdParam
-      const currentWorkspaceHydration = hydration.workspaceId
-
-      const isRegistryReady = hydration.workspaceId !== null
-
-      // Wait for registry to be ready to prevent race conditions
+      // Wait for workflow data to be available before attempting to load
       if (
         !currentId ||
         !currentWorkflowExists ||
-        !isRegistryReady ||
-        (currentWorkspaceHydration && currentWorkspaceHydration !== workspaceId)
+        (hydration.workspaceId && hydration.workspaceId !== workspaceId)
       ) {
         return
       }

apps/sim/stores/workflows/registry/store.ts

@@ -3,6 +3,7 @@ import { create } from 'zustand'
 import { devtools } from 'zustand/middleware'
 import { DEFAULT_DUPLICATE_OFFSET } from '@/lib/workflows/autolayout/constants'
 import { getQueryClient } from '@/app/_shell/providers/get-query-client'
+import { getWorkspaceIdFromUrl } from '@/hooks/queries/utils/get-workspace-id-from-url'
 import { workflowKeys } from '@/hooks/queries/utils/workflow-keys'
 import { useVariablesStore } from '@/stores/panel/variables/store'
 import type {
@@ -142,15 +143,15 @@ export const useWorkflowRegistry = create<WorkflowRegistry>()(
       },
 
       loadWorkflowState: async (workflowId: string) => {
-        // Check if the workflow exists in the React Query cache
-        const workspaceId = get().hydration.workspaceId
+        const workspaceId = get().hydration.workspaceId ?? getWorkspaceIdFromUrl()
+
         const workflows = workspaceId
           ? (getQueryClient().getQueryData<WorkflowMetadata[]>(
               workflowKeys.list(workspaceId, 'active')
             ) ?? [])
           : []
 
-        if (!workflows.find((w) => w.id === workflowId)) {
+        if (workflows.length > 0 && !workflows.find((w) => w.id === workflowId)) {
           const message = `Workflow not found: ${workflowId}`
           logger.error(message)
           set({ error: message })
@@ -163,7 +164,7 @@ export const useWorkflowRegistry = create<WorkflowRegistry>()(
           error: null,
           hydration: {
             phase: 'state-loading',
-            workspaceId: state.hydration.workspaceId,
+            workspaceId: workspaceId ?? state.hydration.workspaceId,
             workflowId,
             requestId,
             error: null,