fix: resolve 3 UX bugs from gitlooper ticket sweep (#45 #47 #48)

- #47: Remove misleading asterisk from Budget (EUR) label in project
  wizard — budget is optional per canGoNext() logic
- #48: Parse Zod validation JSON in wizard submit error handler so users
  see "Responsible person is required" instead of raw JSON array
- #45: Expose isEntriesError from timeline query context; TimelineView
  now renders an explicit error message instead of a silent empty canvas
  when the getEntriesView query fails

Co-Authored-By: claude-flow <ruv@ruv.net>

apps/web/src/components/projects/ProjectWizard.tsx

@@ -423,7 +423,7 @@ function Step2({ state, onChange }: Step2Props) {
 
       <div className="grid grid-cols-1 sm:grid-cols-2 gap-4">
         <div>
-          <label className={LABEL_CLS}>Budget (EUR) *<InfoTooltip content="Total project budget in EUR. Stored internally as cents. Used to track spending against assignments." /></label>
+          <label className={LABEL_CLS}>Budget (EUR)<InfoTooltip content="Total project budget in EUR. Stored internally as cents. Used to track spending against assignments." /></label>
           <input
             type="number"
             min={0}
@@ -1160,7 +1160,23 @@ export function ProjectWizard({ open, onClose }: ProjectWizardProps) {
         handleClose();
       }, 1200);
     } catch (err) {
-      setSubmitError(err instanceof Error ? err.message : "Failed to create project");
+      let errorMessage = "Failed to create project";
+      if (err instanceof Error) {
+        try {
+          const parsed: unknown = JSON.parse(err.message);
+          if (Array.isArray(parsed) && parsed.length > 0) {
+            errorMessage = (parsed as { message?: string }[])
+              .map((e) => e.message)
+              .filter(Boolean)
+              .join("; ");
+          } else {
+            errorMessage = err.message;
+          }
+        } catch {
+          errorMessage = err.message;
+        }
+      }
+      setSubmitError(errorMessage);
     } finally {
       setIsSubmitting(false);
     }