Client-stepper: pre-fill existing KYC/address proofs in edit, fix identifier saves

Edit-mode now shows the previously selected KYC document type + uploaded file thumbnail
(loads from /clients/{id}/identifiers + /client_identifiers/{id}/documents). Same for
address proof on the India address step. Closes the gap where editing a client showed
an empty file picker even when proof had been uploaded on create.

Identifier-save hardened across all three callsites (create-client, edit-client,
identities-tab.createIdentifierWithDocs) - the KYC chip picker proofId is a CODE
string ('AADHAAR'), but backend ClientIdentifierRequest.documentTypeId is Long, which
Spring rejects with HttpMessageNotReadableException -> 400. resolveDocumentTypeId
helper looks up the code against /kyc/proof-types?type=id and substitutes the numeric
CodeValue id before posting. Skips silently for constitution-specific non-individual
docs that have no CodeValue mapping.

KYC payload normalises panNumber / enterprisePan / gstinNumber / cinNumber via
toUpperCase + whitespace strip so user-typed lowercase or trailing spaces don't trip
the backend regex (validation.msg.CLIENTKYC.panNumber.does.not.match.regexp).

State name match in client-address save now normalises both sides (lowercase, collapse
underscores + spaces) so legacy MADHYA_PRADESH resolves to 'Madhya Pradesh' returned
by api.postalpincode.in. Backed by tenant migration 0297.

Identities-tab resolver flattened - was returning identifiers before the per-row
forkJoin(getClientIdentificationDocuments) completed, so the view rendered empty
documents arrays. Now uses switchMap + forkJoin so the resolver awaits completion.

Also bundles concurrent work-in-progress on letter-mgmt, organization, users,
bank-calendar, shell, nominee/notes/identifier dialogs, and theming.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/app/shared/validators/min-words.validator.ts

@@ -0,0 +1,35 @@
+/**
+ * Copyright since 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+import { AbstractControl, ValidatorFn, ValidationErrors } from '@angular/forms';
+
+/**
+ * Reject whitespace-only or single-word input.
+ *
+ * Counts contiguous non-whitespace runs as "words". Empty/whitespace-only
+ * input returns the `minWords` error so an empty string is treated as
+ * insufficient (callers can still chain `Validators.required` if they want a
+ * separate "required" error key).
+ *
+ * @param min minimum number of words required (default: 2)
+ */
+export function minWordsValidator(min = 2): ValidatorFn {
+  return (control: AbstractControl): ValidationErrors | null => {
+    const raw = control.value;
+    if (raw == null) return null;
+    const text = String(raw).trim();
+    if (!text) {
+      return { minWords: { requiredWords: min, actual: 0 } };
+    }
+    const words = text.split(/\s+/).filter((w) => w.length > 0);
+    if (words.length < min) {
+      return { minWords: { requiredWords: min, actual: words.length } };
+    }
+    return null;
+  };
+}