feat(projects): rolled-up project value (newest stage wins per deal, cumulative)

- computeValuation helper: per deal_uuid, the invoice total (installments
  summed, storno netted) wins over the quote; contracts carry no total so
  never contribute. Summed across the project's events, split by currency.
- Value column on the Project Overview list + a value/paid block in the
  cockpit header. Both gated by bills.view/quotes.view so no figure leaks.
- listProjects computes all values in two bulk queries (not per-project).
- en + de i18n; six unit assertions cover the rule's edge cases.

frontend/src/i18n/locales/de.json

@@ -3403,6 +3403,7 @@
       "name": "Projekt",
       "customer": "Kunde",
       "events": "Events",
+      "value": "Wert",
       "status": "Status",
       "updated": "Aktualisiert"
     },
@@ -3410,6 +3411,10 @@
       "label": "Projekt",
       "none": "Kein Projekt"
     },
+    "value": {
+      "label": "Projektwert",
+      "paid": "bezahlt"
+    },
     "events": {
       "title": "Events",
       "none": "Diesem Projekt sind noch keine Events zugeordnet.",

frontend/src/i18n/locales/en.json

@@ -3403,6 +3403,7 @@
       "name": "Project",
       "customer": "Customer",
       "events": "Events",
+      "value": "Value",
       "status": "Status",
       "updated": "Updated"
     },
@@ -3410,6 +3411,10 @@
       "label": "Project",
       "none": "No project"
     },
+    "value": {
+      "label": "Project value",
+      "paid": "paid"
+    },
     "events": {
       "title": "Events",
       "none": "No events grouped under this project yet.",

frontend/src/pages/admin/projects/ProjectCockpitPage.tsx

@@ -185,7 +185,8 @@ export const ProjectCockpitPage: React.FC = () => {
   if (isLoading) return <Loading />;
   if (!data) return <div className="p-6 text-neutral-500">{t('projects.notFound', 'Project not found')}</div>;
 
-  const { project, milestones, hours } = data;
+  const { project, milestones, hours, valuation } = data;
+  const valueBuckets = valuation?.byCurrency?.filter((b) => b.totalMinor !== 0 || b.paidMinor !== 0) || [];
 
   return (
     <div>
@@ -216,9 +217,26 @@ export const ProjectCockpitPage: React.FC = () => {
               {t('projects.totalHours', '{{hours}} logged', { hours: minutesToHours(hours.totalMinutes) })}
             </p>
           </div>
-          {editName === null && (
-            <Button variant="outline" onClick={() => setEditName(project.name)}>{t('projects.rename', 'Rename')}</Button>
-          )}
+          <div className="flex items-start gap-4">
+            {valueBuckets.length > 0 && (
+              <div className="text-right">
+                <div className="text-xs text-neutral-500 dark:text-neutral-400">{t('projects.value.label', 'Project value')}</div>
+                {valueBuckets.map((b) => (
+                  <div key={b.currency} className="text-lg font-bold text-neutral-900 dark:text-neutral-100 tabular-nums">
+                    {formatMoneyMinor(b.totalMinor, b.currency)}
+                  </div>
+                ))}
+                {valueBuckets.some((b) => b.paidMinor !== 0) && (
+                  <div className="text-xs text-neutral-500 dark:text-neutral-400">
+                    {t('projects.value.paid', 'paid')}: {valueBuckets.map((b) => formatMoneyMinor(b.paidMinor, b.currency)).join(' · ')}
+                  </div>
+                )}
+              </div>
+            )}
+            {editName === null && (
+              <Button variant="outline" onClick={() => setEditName(project.name)}>{t('projects.rename', 'Rename')}</Button>
+            )}
+          </div>
         </div>
       </Card>
 

frontend/src/pages/admin/projects/ProjectsListPage.tsx

@@ -15,6 +15,15 @@ import { Plus, Search, FolderKanban } from 'lucide-react';
 import { Button, Card, Input, Loading } from '../../../components/common';
 import { projectsService, type ProjectSummary } from '../../../services/projects.service';
 import { useLocalizedDate } from '../../../hooks/useLocalizedDate';
+import { formatMoneyMinor } from '../../../utils/money';
+
+/** Render a project's rolled-up value (newest stage per deal, cumulative),
+ *  one entry per currency. Empty → em dash. */
+function formatValuation(p: ProjectSummary): string {
+  const buckets = p.valuation?.byCurrency?.filter((b) => b.totalMinor !== 0) || [];
+  if (buckets.length === 0) return '—';
+  return buckets.map((b) => formatMoneyMinor(b.totalMinor, b.currency)).join(' · ');
+}
 
 export const ProjectsListPage: React.FC = () => {
   const { t } = useTranslation();
@@ -109,6 +118,7 @@ export const ProjectsListPage: React.FC = () => {
                   <th className="px-4 py-2 font-medium">{t('projects.col.name', 'Project')}</th>
                   <th className="px-4 py-2 font-medium">{t('projects.col.customer', 'Customer')}</th>
                   <th className="px-4 py-2 font-medium text-right">{t('projects.col.events', 'Events')}</th>
+                  <th className="px-4 py-2 font-medium text-right">{t('projects.col.value', 'Value')}</th>
                   <th className="px-4 py-2 font-medium">{t('projects.col.status', 'Status')}</th>
                   <th className="px-4 py-2 font-medium">{t('projects.col.updated', 'Updated')}</th>
                 </tr>
@@ -123,6 +133,7 @@ export const ProjectsListPage: React.FC = () => {
                     <td className="px-4 py-2 font-medium text-neutral-900 dark:text-neutral-100">{p.name}</td>
                     <td className="px-4 py-2 text-neutral-600 dark:text-neutral-400">{p.customerEmail || '—'}</td>
                     <td className="px-4 py-2 text-right tabular-nums">{p.eventCount ?? 0}</td>
+                    <td className="px-4 py-2 text-right tabular-nums font-medium text-neutral-900 dark:text-neutral-100">{formatValuation(p)}</td>
                     <td className="px-4 py-2">
                       <span className="inline-block rounded-full px-2 py-0.5 text-xs bg-neutral-100 dark:bg-neutral-700 text-neutral-700 dark:text-neutral-200">
                         {p.status}

frontend/src/services/projects.service.ts

@@ -9,6 +9,12 @@ import { api } from '../config/api';
 
 export type ProjectStatus = 'active' | 'archived' | string;
 
+/** Rolled-up project value: newest stage wins per deal (invoice > quote;
+ *  contracts carry no total), cumulative across events, split by currency. */
+export interface ProjectValuation {
+  byCurrency: Array<{ currency: string; totalMinor: number; paidMinor: number }>;
+}
+
 export interface ProjectSummary {
   id: number;
   name: string;
@@ -16,6 +22,7 @@ export interface ProjectSummary {
   customerEmail: string | null;
   status: ProjectStatus;
   eventCount?: number;
+  valuation?: ProjectValuation;
   createdAt: string | null;
   updatedAt: string | null;
 }
@@ -101,6 +108,7 @@ export interface ProjectOverview {
   invoices: ProjectInvoice[];
   hours: { entries: ProjectHourEntry[]; totalMinutes: number };
   milestones: ProjectMilestone[];
+  valuation: ProjectValuation;
 }
 
 export interface EmailPreview {