fix(web): allow workflow graph view to load without a codebase (coleam00#959)

* fix(web): allow workflow graph view to load without a codebase (coleam00#958)

The useQuery for workflow definitions required both workflowName and
codebaseCwd to be truthy. For CLI-triggered runs or "No project" web
runs where codebase_id is null, codebaseCwd stays undefined and the
query never fires — showing "Loading graph..." forever. The server
already handles missing cwd by falling back to bundled defaults, so
the client gate only needs workflowName.

Fixes coleam00#958

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* fix(web): clarify server fallback chain comment for absent codebaseCwd

Update inline comment to accurately describe the two-step server fallback:
when cwd is absent the server first tries the first registered codebase
before falling back to bundled defaults. The previous comment skipped the
intermediate step, which could confuse developers debugging unexpected
workflow resolution for "No project" runs.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: coleam00

packages/web/src/components/workflows/WorkflowExecution.tsx

@@ -235,12 +235,13 @@ export function WorkflowExecution({ runId }: WorkflowExecutionProps): React.Reac
   }, [codebaseId]);
 
   // Fetch workflow definition for DAG topology (depends_on edges).
-  // Enabled whenever we have a workflow name and cwd — isDag is derived from the result,
-  // not used as a gate, to avoid a circular dependency.
+  // Only gated on workflowName — codebaseCwd is optional; when absent the server tries the
+  // first registered codebase before falling back to bundled defaults (handles CLI runs and
+  // "No project" web runs).
   const { data: workflowDef } = useQuery({
     queryKey: ['workflowDefinition', initialData?.workflowName, codebaseCwd],
     queryFn: () => getWorkflow(initialData?.workflowName ?? '', codebaseCwd ?? undefined),
-    enabled: !!initialData?.workflowName && !!codebaseCwd,
+    enabled: !!initialData?.workflowName,
     staleTime: Infinity,
   });
   const dagDefinitionNodes = workflowDef?.workflow?.nodes ?? null;