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.html

@@ -85,10 +85,16 @@
 
   <div class="pg-card">
     <div class="pos-section-label">Portfolio Allocation — Target vs Actual</div>
+    <p class="pg-sub">
+      Govt Security, Non-SLR, Mutual Fund and Share targets trace to RBI's SLR floor (18% of NDTL) and Non-SLR ceiling
+      (≤10% of deposits) for Urban Co-operative Banks; Fixed Deposit and Bond are board-approved policy choices within
+      the room that framework leaves.
+    </p>
     <table class="pg-table">
       <thead>
         <tr>
           <th>Instrument Type</th>
+          <th>Target Basis</th>
           <th class="num">Target %</th>
           <th class="num">Actual %</th>
           <th class="num">Actual Value</th>
@@ -100,6 +106,11 @@
         @for (a of allocationVsTarget; track a.type) {
           <tr>
             <td>{{ a.label }}</td>
+            <td>
+              <span class="inv-badge" [class.inv-badge--matured]="a.isRbiLinked">
+                {{ a.isRbiLinked ? 'RBI SLR / Non-SLR Norm' : 'Board Policy' }}
+              </span>
+            </td>
             <td class="num">{{ a.targetPct }}%</td>
             <td class="num">{{ a.actualPct }}%</td>
             <td class="num">₹{{ a.actualValue | number: '1.2-2' }}</td>