feat: Sprint 1 — staffing assign, dashboard cache, bulk ops, notifications

Staffing "Assign" Button:
- Inline assignment form on each suggestion card in StaffingPanel
- Pre-fills project, dates, hours from search criteria
- 1-click confirm creates allocation with PROPOSED status
- Success/error toasts, removes assigned suggestions from list

Dashboard Redis Caching:
- New cache utility (packages/api/src/lib/cache.ts) with get/set/invalidate
- All 5 dashboard queries wrapped with 60s TTL cache-aside pattern
- Auto-invalidation on allocation + project mutations (fire-and-forget)
- Graceful fallthrough to DB if Redis unavailable

Bulk Operations:
- CSV export for selected resources and projects (apps/web/src/lib/csv-export.ts)
- Project batch delete mutation with cascade (assignments, demands, rules)
- Export/Delete buttons added to BatchActionBar on both list pages

Budget Overrun Notifications:
- checkBudgetThresholds() alerts at 80% (HIGH) and 100% (URGENT)
- Called after every allocation mutation, duplicate-safe
- Targets ADMIN + MANAGER users with SSE delivery

Estimate Approval Reminders:
- checkPendingEstimateReminders() finds SUBMITTED versions > 3 days old
- Cron endpoint: GET /api/cron/estimate-reminders (optional CRON_SECRET auth)
- Creates in-app REMINDER notifications, duplicate-safe

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

packages/api/src/router/allocation.ts

@@ -29,7 +29,9 @@ import { TRPCError } from "@trpc/server";
 import { z } from "zod";
 import { findUniqueOrThrow } from "../db/helpers.js";
 import { anonymizeResource, getAnonymizationDirectory } from "../lib/anonymization.js";
+import { checkBudgetThresholds } from "../lib/budget-alerts.js";
 import { emitAllocationCreated, emitAllocationDeleted, emitAllocationUpdated, emitNotificationCreated } from "../sse/event-bus.js";
+import { invalidateDashboardCache } from "../lib/cache.js";
 import { createTRPCRouter, managerProcedure, protectedProcedure, requirePermission } from "../trpc.js";
 import { PROJECT_BRIEF_SELECT, RESOURCE_BRIEF_SELECT, ROLE_BRIEF_SELECT } from "../db/selects.js";
 
@@ -242,6 +244,9 @@ export const allocationRouter = createTRPCRouter({
         projectId: allocation.projectId,
         resourceId: allocation.resourceId,
       });
+      void invalidateDashboardCache();
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      void checkBudgetThresholds(ctx.db as any, allocation.projectId);
       return allocation;
     }),
 
@@ -445,6 +450,7 @@ export const allocationRouter = createTRPCRouter({
         projectId: demandRequirement.projectId,
         resourceId: null,
       });
+      void invalidateDashboardCache();
 
       // Create staffing tasks for managers
       const [project, roleEntity, managers] = await Promise.all([
@@ -487,6 +493,8 @@ export const allocationRouter = createTRPCRouter({
         emitNotificationCreated(manager.id, task.id);
       }
 
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      void checkBudgetThresholds(ctx.db as any, demandRequirement.projectId);
       return demandRequirement;
     }),
 
@@ -508,6 +516,9 @@ export const allocationRouter = createTRPCRouter({
         projectId: updated.projectId,
         resourceId: null,
       });
+      void invalidateDashboardCache();
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      void checkBudgetThresholds(ctx.db as any, updated.projectId);
 
       return updated;
     }),
@@ -529,6 +540,9 @@ export const allocationRouter = createTRPCRouter({
         projectId: assignment.projectId,
         resourceId: assignment.resourceId,
       });
+      void invalidateDashboardCache();
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      void checkBudgetThresholds(ctx.db as any, assignment.projectId);
 
       return assignment;
     }),
@@ -551,6 +565,9 @@ export const allocationRouter = createTRPCRouter({
         projectId: updated.projectId,
         resourceId: updated.resourceId,
       });
+      void invalidateDashboardCache();
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      void checkBudgetThresholds(ctx.db as any, updated.projectId);
 
       return updated;
     }),
@@ -585,6 +602,9 @@ export const allocationRouter = createTRPCRouter({
       });
 
       emitAllocationDeleted(existing.id, existing.projectId);
+      void invalidateDashboardCache();
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      void checkBudgetThresholds(ctx.db as any, existing.projectId);
 
       return { success: true };
     }),
@@ -607,6 +627,9 @@ export const allocationRouter = createTRPCRouter({
         projectId: result.updatedDemandRequirement.projectId,
         resourceId: null,
       });
+      void invalidateDashboardCache();
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      void checkBudgetThresholds(ctx.db as any, result.assignment.projectId);
 
       return result;
     }),
@@ -623,6 +646,9 @@ export const allocationRouter = createTRPCRouter({
       if (result.updatedAllocation) {
         emitAllocationUpdated(result.updatedAllocation);
       }
+      void invalidateDashboardCache();
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      void checkBudgetThresholds(ctx.db as any, result.createdAllocation.projectId as string);
 
       return result;
     }),
@@ -665,6 +691,9 @@ export const allocationRouter = createTRPCRouter({
         projectId: updated.projectId,
         resourceId: updated.resourceId,
       });
+      void invalidateDashboardCache();
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      void checkBudgetThresholds(ctx.db as any, updated.projectId);
 
       return updated;
     }),
@@ -699,6 +728,9 @@ export const allocationRouter = createTRPCRouter({
       });
 
       emitAllocationDeleted(existing.id, existing.projectId);
+      void invalidateDashboardCache();
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      void checkBudgetThresholds(ctx.db as any, existing.projectId);
 
       return { success: true };
     }),
@@ -726,6 +758,9 @@ export const allocationRouter = createTRPCRouter({
       });
 
       emitAllocationDeleted(existing.entry.id, existing.projectId);
+      void invalidateDashboardCache();
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      void checkBudgetThresholds(ctx.db as any, existing.projectId);
 
       return { success: true };
     }),
@@ -760,6 +795,13 @@ export const allocationRouter = createTRPCRouter({
       for (const a of existing) {
         emitAllocationDeleted(a.entry.id, a.projectId);
       }
+      void invalidateDashboardCache();
+      // Check budget thresholds for each affected project
+      const affectedProjectIds = [...new Set(existing.map((a) => a.projectId))];
+      for (const pid of affectedProjectIds) {
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        void checkBudgetThresholds(ctx.db as any, pid);
+      }
 
       return { count: existing.length };
     }),
@@ -804,6 +846,13 @@ export const allocationRouter = createTRPCRouter({
       for (const a of updated) {
         emitAllocationUpdated({ id: a.id, projectId: a.projectId, resourceId: a.resourceId });
       }
+      void invalidateDashboardCache();
+      // Check budget thresholds for each affected project
+      const affectedProjectIds = [...new Set(updated.map((a) => a.projectId))];
+      for (const pid of affectedProjectIds) {
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        void checkBudgetThresholds(ctx.db as any, pid);
+      }
 
       return { count: updated.length };
     }),