feat(investment,npa): RBI-grounded targets, GL-tracked interest posting, date/search pickers

- Correct Investment portfolio allocation and Loan Origination product-mix targets against
  RBI's UCB SLR/Non-SLR framework and PSL circulars, with a Target Basis column distinguishing
  RBI-mandated vs board-policy rows (Excel export included).
- Expand Investment holdings dataset with more near-term maturities so the Due-Date Diary
  reflects a realistic spread across FD/Govt Security/Non-SLR/Bond.
- Add From/To period-based Interest Calculation & Post (with GL selection for both posting and
  receiving) across the Investment Interest module, FD Entry and Bond Entry screens; fix a bug
  where a posted period kept re-appearing as due since accrual wasn't tracked per-holding.
- Add a reusable DD-MM-YYYY date-picker component and roll it out across all Investment date
  fields.
- NPA Summary Report: drop SMA-0/1/2 from the stage-wise table (kept in Day-wise Overdue only).
- NPA Recovery Report: add Account Type / NPA Category / Target-vs-Actual columns, a shared
  Account Type filter driving both the account picker and the register, and a searchable
  (fixed-position, not clipped by card overflow) account select for long lists.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/app/investment/investment-dashboard/investment-dashboard.component.ts

@@ -11,6 +11,7 @@ import { CommonModule } from '@angular/common';
 import { RouterLink } from '@angular/router';
 import {
   ALL_HOLDINGS,
+  ALLOCATION_TARGET_IS_RBI_LINKED,
   INSTRUMENT_LABELS,
   InstrumentType,
   InvestmentHolding,
@@ -39,6 +40,9 @@ interface AllocationRow {
   actualValue: number;
   variancePct: number;
   statusLabel: 'Within Target' | 'Over-Allocated' | 'Under-Allocated';
+  /** True when the target itself traces to an RBI SLR/Non-SLR rule rather than being a
+   *  board-only policy choice — see TARGET_ALLOCATION_PCT's doc comment in investment-data.ts. */
+  isRbiLinked: boolean;
 }
 
 /** Cross-instrument portfolio dashboard — every figure is derived from ALL_HOLDINGS, never
@@ -114,7 +118,8 @@ export class InvestmentDashboardComponent {
         actualPct: +actualPct.toFixed(1),
         actualValue: value,
         variancePct,
-        statusLabel
+        statusLabel,
+        isRbiLinked: ALLOCATION_TARGET_IS_RBI_LINKED[type]
       };
     });
   }
@@ -195,6 +200,7 @@ export class InvestmentDashboardComponent {
             subtitle: `As on ${this.asOnDate}`,
             headers: [
               'Instrument Type',
+              'Target Basis',
               'Target %',
               'Actual %',
               'Actual Value',
@@ -203,6 +209,7 @@ export class InvestmentDashboardComponent {
             ],
             widths: [
               26,
+              20,
               12,
               12,
               18,
@@ -211,6 +218,7 @@ export class InvestmentDashboardComponent {
             ],
             rows: this.allocationVsTarget.map((a) => [
               a.label,
+              a.isRbiLinked ? 'RBI SLR / Non-SLR Norm' : 'Board Policy',
               a.targetPct,
               a.actualPct,
               a.actualValue,