feat: Nearshore-Ratio indicator per project

Engine (packages/engine):
- calculateShoringRatio() pure function: onshore/offshore hours,
  country breakdown, threshold check, weighted by hours not headcount
- 12 unit tests: empty, 100% onshore/offshore, mixed ratios,
  custom threshold, case-insensitive, unknown country, FTE weighting

Schema:
- Project.shoringThreshold (default 55%) — per-project configurable
- Project.onshoreCountryCode (default "DE") — configurable onshore country

API (project router):
- getShoringRatio query: loads assignments with resource.country,
  computes ratio, returns full breakdown
- update mutation: accepts shoringThreshold + onshoreCountryCode

UI:
- ShoringIndicator: stacked horizontal bar with country segments,
  severity badge (green/yellow/red), hover tooltip, dark theme
- ShoringBadge: mini colored dot + % for project list column
- ProjectModal: "Max Offshore %" number input
- Project detail: indicator after budget status card
- Project list: "Shoring" column (default hidden, toggleable)

AI Assistant:
- get_shoring_ratio tool: human-readable breakdown with threshold alert

Colors: green (<threshold-10), yellow (threshold-10 to threshold), red (>=threshold)
Default: 55% offshore threshold, "DE" as onshore country

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

apps/web/src/app/(app)/projects/ProjectsClient.tsx

@@ -27,6 +27,7 @@ import { useViewPrefs } from "~/hooks/useViewPrefs.js";
 import { useRowOrder } from "~/hooks/useRowOrder.js";
 import { SortableColumnHeader } from "~/components/ui/SortableColumnHeader.js";
 import { DraggableTableRow } from "~/components/ui/DraggableTableRow.js";
+import { ShoringBadge } from "~/components/projects/ShoringIndicator.js";
 
 import { PROJECT_STATUS_BADGE as STATUS_COLORS, ORDER_TYPE_BADGE as ORDER_TYPE_COLORS } from "~/lib/status-styles.js";
 
@@ -453,6 +454,12 @@ export function ProjectsClient() {
             )}
           </td>
         );
+      case "shoring":
+        return (
+          <td key={col.key} className="px-4 py-3 text-center">
+            <ShoringBadge projectId={project.id} />
+          </td>
+        );
       case "responsible":
         return <td key={col.key} className="px-4 py-3 text-sm text-gray-500 dark:text-gray-400">—</td>;
       default: