fix(clients): minor-age threshold to 18, senior/PWD doc reload, in-app document preview dialog

- Raise isMinor threshold from age <10 to <18 (legal definition), cascading correctly to
  guardian requirement, KYC document filtering, and Education Level/Degree Qualification
  visibility (now shown for all ages, not hidden for minors).
- Load and display previously-uploaded Senior Citizen proof / PWD certificate documents on
  edit (view/replace/remove), instead of always showing an empty upload prompt.
- Fix seniorPwdDocsComplete to accept an existing certificate, not just a freshly-picked file.
- Add DocumentPreviewDialogComponent: a reusable in-app modal (image/PDF/download) used in
  place of window.open() for saved KYC/address/senior-citizen/PWD documents — avoids popup
  blockers (fired only after the async download resolved) and Chrome/Edge's failure to paint
  large base64 data: URLs on first open.

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

src/app/clients/client-stepper/client-general-step/client-general-step.component.html

@@ -365,7 +365,7 @@
       }
     </div>
 
-    <!-- Minor / Guardian Mapping (mandatory if age < 10) -->
+    <!-- Minor / Guardian Mapping (mandatory if age < 18) -->
     @if (isMinor && createClientForm.get('legalFormId')?.value === LegalFormId.PERSON) {
       <div class="guardian-section">
         <!-- Header bar -->
@@ -1035,69 +1035,67 @@
         Education &amp; Social Details
       </h4>
       <div class="form-grid">
-        <!-- Education Level (non-minor) -->
-        @if (!isMinor) {
-          <mat-form-field appearance="outline" class="form-field">
-            <mat-label>Education Level</mat-label>
-            <mat-select formControlName="educationLevelId">
-              <mat-select-trigger>
-                @if (getSelectedEducationLevel()) {
-                  <span class="icon-option">
-                    <mat-icon class="icon-option-icon">{{
-                      getEducationLevelIcon(getSelectedEducationLevel().name)
-                    }}</mat-icon>
-                    {{ getSelectedEducationLevel().name }}
-                  </span>
-                }
-              </mat-select-trigger>
-              @for (el of educationLevelOptions; track el) {
-                <mat-option [value]="el.id">
-                  <span class="icon-option">
-                    <mat-icon class="icon-option-icon">{{ getEducationLevelIcon(el.name) }}</mat-icon>
-                    {{ el.name }}
-                  </span>
-                </mat-option>
+        <!-- Education Level -->
+        <mat-form-field appearance="outline" class="form-field">
+          <mat-label>Education Level</mat-label>
+          <mat-select formControlName="educationLevelId">
+            <mat-select-trigger>
+              @if (getSelectedEducationLevel()) {
+                <span class="icon-option">
+                  <mat-icon class="icon-option-icon">{{
+                    getEducationLevelIcon(getSelectedEducationLevel().name)
+                  }}</mat-icon>
+                  {{ getSelectedEducationLevel().name }}
+                </span>
               }
-            </mat-select>
-          </mat-form-field>
+            </mat-select-trigger>
+            @for (el of educationLevelOptions; track el) {
+              <mat-option [value]="el.id">
+                <span class="icon-option">
+                  <mat-icon class="icon-option-icon">{{ getEducationLevelIcon(el.name) }}</mat-icon>
+                  {{ el.name }}
+                </span>
+              </mat-option>
+            }
+          </mat-select>
+        </mat-form-field>
 
-          <!-- Degree / Qualification (depends on Education Level) -->
-          <mat-form-field appearance="outline" class="form-field">
-            <mat-label>Degree / Qualification</mat-label>
-            <mat-select
-              formControlName="degreeQualificationId"
-              [placeholder]="getSelectedEducationLevel() ? 'Select Degree' : 'Select Education Level first'"
-            >
-              <mat-select-trigger>
-                @if (getSelectedDegreeQualification()) {
-                  <span class="icon-option">
-                    <mat-icon class="icon-option-icon">{{
-                      getDegreeQualificationIcon(getSelectedDegreeQualification().name)
-                    }}</mat-icon>
-                    {{ getSelectedDegreeQualification().name }}
-                  </span>
-                }
-              </mat-select-trigger>
-              @for (dq of filteredDegreeQualificationOptions; track dq) {
-                <mat-option [value]="dq.id">
-                  <span class="icon-option">
-                    <mat-icon class="icon-option-icon">{{ getDegreeQualificationIcon(dq.name) }}</mat-icon>
-                    {{ dq.name }}
-                  </span>
-                </mat-option>
+        <!-- Degree / Qualification (depends on Education Level) -->
+        <mat-form-field appearance="outline" class="form-field">
+          <mat-label>Degree / Qualification</mat-label>
+          <mat-select
+            formControlName="degreeQualificationId"
+            [placeholder]="getSelectedEducationLevel() ? 'Select Degree' : 'Select Education Level first'"
+          >
+            <mat-select-trigger>
+              @if (getSelectedDegreeQualification()) {
+                <span class="icon-option">
+                  <mat-icon class="icon-option-icon">{{
+                    getDegreeQualificationIcon(getSelectedDegreeQualification().name)
+                  }}</mat-icon>
+                  {{ getSelectedDegreeQualification().name }}
+                </span>
               }
-              @if (!getSelectedEducationLevel()) {
-                <mat-option disabled>
-                  <em>Please select Education Level first</em>
-                </mat-option>
-              } @else if (filteredDegreeQualificationOptions.length === 0) {
-                <mat-option disabled>
-                  <em>No options available</em>
-                </mat-option>
-              }
-            </mat-select>
-          </mat-form-field>
-        }
+            </mat-select-trigger>
+            @for (dq of filteredDegreeQualificationOptions; track dq) {
+              <mat-option [value]="dq.id">
+                <span class="icon-option">
+                  <mat-icon class="icon-option-icon">{{ getDegreeQualificationIcon(dq.name) }}</mat-icon>
+                  {{ dq.name }}
+                </span>
+              </mat-option>
+            }
+            @if (!getSelectedEducationLevel()) {
+              <mat-option disabled>
+                <em>Please select Education Level first</em>
+              </mat-option>
+            } @else if (filteredDegreeQualificationOptions.length === 0) {
+              <mat-option disabled>
+                <em>No options available</em>
+              </mat-option>
+            }
+          </mat-select>
+        </mat-form-field>
 
         <!-- Religion -->
         <mat-form-field appearance="outline" class="form-field">
@@ -1322,6 +1320,8 @@
               <fa-icon icon="file-upload"></fa-icon>
               @if (seniorCitizenProofFile) {
                 <span>{{ seniorCitizenProofFile.name }}</span>
+              } @else if (existingSeniorCitizenProofDoc) {
+                <span>{{ existingSeniorCitizenProofDoc.name }} (uploaded)</span>
               } @else {
                 <span>Upload Senior Citizen Proof (Age / ID Proof) &mdash; optional</span>
               }
@@ -1330,6 +1330,13 @@
               <button type="button" mat-icon-button (click)="removeSeniorCitizenProof()" matTooltip="Remove">
                 <mat-icon>close</mat-icon>
               </button>
+            } @else if (existingSeniorCitizenProofDoc) {
+              <button type="button" mat-icon-button (click)="viewExistingSeniorCitizenProof()" matTooltip="View">
+                <mat-icon>visibility</mat-icon>
+              </button>
+              <button type="button" mat-icon-button (click)="removeExistingSeniorCitizenProof()" matTooltip="Remove">
+                <mat-icon>close</mat-icon>
+              </button>
             }
           </div>
         }
@@ -1354,12 +1361,16 @@
           <div class="full-width doc-upload-field">
             <label
               class="doc-upload-label"
-              [class.doc-upload-label--missing]="seniorPwdDocsTouched && !pwdCertificateFile"
+              [class.doc-upload-label--missing]="
+                seniorPwdDocsTouched && !pwdCertificateFile && !existingPwdCertificateDoc
+              "
             >
               <input type="file" accept=".jpg,.jpeg,.png,.pdf" hidden (change)="onPwdCertificateSelected($event)" />
               <fa-icon icon="file-upload"></fa-icon>
               @if (pwdCertificateFile) {
                 <span>{{ pwdCertificateFile.name }}</span>
+              } @else if (existingPwdCertificateDoc) {
+                <span>{{ existingPwdCertificateDoc.name }} (uploaded)</span>
               } @else {
                 <span>Upload Disability Certificate <span class="doc-upload-req">*</span></span>
               }
@@ -1368,8 +1379,15 @@
               <button type="button" mat-icon-button (click)="removePwdCertificate()" matTooltip="Remove">
                 <mat-icon>close</mat-icon>
               </button>
+            } @else if (existingPwdCertificateDoc) {
+              <button type="button" mat-icon-button (click)="viewExistingPwdCertificate()" matTooltip="View">
+                <mat-icon>visibility</mat-icon>
+              </button>
+              <button type="button" mat-icon-button (click)="removeExistingPwdCertificate()" matTooltip="Remove">
+                <mat-icon>close</mat-icon>
+              </button>
             }
-            @if (seniorPwdDocsTouched && !pwdCertificateFile) {
+            @if (seniorPwdDocsTouched && !pwdCertificateFile && !existingPwdCertificateDoc) {
               <span class="doc-upload-error">Required when PWD is checked</span>
             }
           </div>

src/app/clients/client-stepper/client-general-step/client-general-step.component.ts

@@ -46,6 +46,7 @@ import { MatSelectTrigger } from '@angular/material/select';
 import { MatTooltip } from '@angular/material/tooltip';
 import { MatDialog, MAT_DIALOG_DATA, MatDialogContent, MatDialogClose } from '@angular/material/dialog';
 import { STANDALONE_SHARED_IMPORTS } from 'app/standalone-shared.module';
+import { DocumentPreviewDialogComponent } from '../../shared/document-preview-dialog/document-preview-dialog.component';
 import { DateFormatPipe } from '../../../pipes/date-format.pipe';
 import { SanctionsVerifyDialogComponent } from './sanctions-verify-dialog.component';
 import { DipVerifyDialogComponent } from './dip-verify-dialog.component';
@@ -98,6 +99,11 @@ export class ClientGeneralStepComponent implements OnInit, OnDestroy, OnChanges
   seniorCitizenProofFile: File | null = null;
   pwdCertificateFile: File | null = null;
 
+  /** Previously-uploaded documents, loaded in edit mode so the certificate doesn't appear to
+   * "disappear" on reopening — the raw File properties above only ever hold a fresh selection. */
+  existingSeniorCitizenProofDoc: { id: string; name: string } | null = null;
+  existingPwdCertificateDoc: { id: string; name: string } | null = null;
+
   /** Disability categories (per the Rights of Persons with Disabilities Act, 2016) — fetched from
    * m_code_value (code "PwdCategory") via the client template, same as occupationCategoryOptions.
    * Admins can add/reorder/deactivate entries from System -> Manage Codes without a code change. */
@@ -111,7 +117,8 @@ export class ClientGeneralStepComponent implements OnInit, OnDestroy, OnChanges
   get seniorPwdDocsComplete(): boolean {
     const pwdOk =
       !this.createClientForm.get('isPwd')?.value ||
-      (!!this.pwdCertificateFile && !!this.createClientForm.get('pwdCategoryId')?.value);
+      ((!!this.pwdCertificateFile || !!this.existingPwdCertificateDoc) &&
+        !!this.createClientForm.get('pwdCategoryId')?.value);
     return pwdOk;
   }
 
@@ -141,6 +148,93 @@ export class ClientGeneralStepComponent implements OnInit, OnDestroy, OnChanges
     this.pwdCertificateFile = null;
   }
 
+  /** Loads previously-uploaded senior-citizen-proof / PWD-certificate documents in edit mode —
+   * mirrors the KYC step's loadExistingSignature() pattern so re-opening edit shows what's
+   * already on file instead of an empty upload prompt. */
+  private loadExistingSeniorPwdDocuments(): void {
+    const clientId = this.clientData?.id;
+    if (!clientId) {
+      return;
+    }
+    this.clientService.getClientDocuments(clientId.toString()).subscribe({
+      next: (documents: any[]) => {
+        const seniorDoc = documents
+          ?.filter((d: any) => d.name === 'seniorCitizenProof')
+          ?.sort((a: any, b: any) => b.id - a.id)?.[0];
+        if (seniorDoc?.id) {
+          this.existingSeniorCitizenProofDoc = {
+            id: seniorDoc.id.toString(),
+            name: seniorDoc.fileName || 'Senior Citizen Proof'
+          };
+        }
+        const pwdDoc = documents
+          ?.filter((d: any) => d.name === 'pwdCertificate')
+          ?.sort((a: any, b: any) => b.id - a.id)?.[0];
+        if (pwdDoc?.id) {
+          this.existingPwdCertificateDoc = {
+            id: pwdDoc.id.toString(),
+            name: pwdDoc.fileName || 'Disability Certificate'
+          };
+        }
+      },
+      error: () => {}
+    });
+  }
+
+  viewExistingSeniorCitizenProof(): void {
+    const clientId = this.clientData?.id;
+    if (!clientId || !this.existingSeniorCitizenProofDoc) {
+      return;
+    }
+    this.clientService.downloadClientDocument(clientId.toString(), this.existingSeniorCitizenProofDoc.id).subscribe({
+      next: (blob: any) =>
+        this.dialog.open(DocumentPreviewDialogComponent, {
+          data: {
+            blob,
+            title: this.existingSeniorCitizenProofDoc?.name,
+            fileName: this.existingSeniorCitizenProofDoc?.name
+          }
+        }),
+      error: () => {}
+    });
+  }
+
+  removeExistingSeniorCitizenProof(): void {
+    const clientId = this.clientData?.id;
+    if (!clientId || !this.existingSeniorCitizenProofDoc) {
+      return;
+    }
+    this.clientService.deleteClientDocument(clientId.toString(), this.existingSeniorCitizenProofDoc.id).subscribe({
+      next: () => (this.existingSeniorCitizenProofDoc = null),
+      error: () => {}
+    });
+  }
+
+  viewExistingPwdCertificate(): void {
+    const clientId = this.clientData?.id;
+    if (!clientId || !this.existingPwdCertificateDoc) {
+      return;
+    }
+    this.clientService.downloadClientDocument(clientId.toString(), this.existingPwdCertificateDoc.id).subscribe({
+      next: (blob: any) =>
+        this.dialog.open(DocumentPreviewDialogComponent, {
+          data: { blob, title: this.existingPwdCertificateDoc?.name, fileName: this.existingPwdCertificateDoc?.name }
+        }),
+      error: () => {}
+    });
+  }
+
+  removeExistingPwdCertificate(): void {
+    const clientId = this.clientData?.id;
+    if (!clientId || !this.existingPwdCertificateDoc) {
+      return;
+    }
+    this.clientService.deleteClientDocument(clientId.toString(), this.existingPwdCertificateDoc.id).subscribe({
+      next: () => (this.existingPwdCertificateDoc = null),
+      error: () => {}
+    });
+  }
+
   /** Minimum date allowed. */
   minDate = new Date(2000, 0, 1);
   /** Maximum date allowed. */
@@ -203,7 +297,7 @@ export class ClientGeneralStepComponent implements OnInit, OnDestroy, OnChanges
   ];
   /** Calculated age detail string (Y/M/D) */
   calculatedAgeDetail: string | null = null;
-  /** Whether client is a minor (age < 10) */
+  /** Whether client is a minor (age < 18) */
   isMinor = false;
   /** Whether client is a senior citizen (age >= 60) — auto-detected from Date of Birth */
   isSeniorCitizen = false;
@@ -600,6 +694,7 @@ export class ClientGeneralStepComponent implements OnInit, OnDestroy, OnChanges
    */
   private prefillForEdit() {
     const data = this.clientData;
+    this.loadExistingSeniorPwdDocuments();
 
     // Patch all base controls that exist on the form
     this.createClientForm.patchValue({
@@ -980,7 +1075,7 @@ export class ClientGeneralStepComponent implements OnInit, OnDestroy, OnChanges
             this.calculatedAgeDetail = `${years} yr${years !== 1 ? 's' : ''} ${months} mo${months !== 1 ? 's' : ''} ${days} day${days !== 1 ? 's' : ''}`;
             this.ageBreakdown = { years, months, days };
             const wasMinor = this.isMinor;
-            this.isMinor = years < 10;
+            this.isMinor = years < 18;
             this.isSeniorCitizen = years >= 60;
             // Add/remove guardian form group based on minor status
             if (this.isMinor && !wasMinor) {

src/app/clients/client-stepper/client-india-address-step/client-india-address-step.component.ts

@@ -15,9 +15,11 @@ import { MatCheckbox } from '@angular/material/checkbox';
 import { MatTabsModule } from '@angular/material/tabs';
 import { MatIcon } from '@angular/material/icon';
 import { MatIconButton, MatButton } from '@angular/material/button';
+import { MatDialog } from '@angular/material/dialog';
 import { ClientsService } from '../../clients.service';
 import { ProofType, normalizeProofType, groupProofsByCategory } from '../../shared/kyc-proof-types';
 import { KycUploadHelperService } from '../../shared/kyc-upload-helper.service';
+import { DocumentPreviewDialogComponent } from '../../shared/document-preview-dialog/document-preview-dialog.component';
 
 @Component({
   selector: 'mifosx-client-india-address-step',
@@ -38,6 +40,7 @@ export class ClientIndiaAddressStepComponent implements OnInit, OnChanges {
   private http = inject(HttpClient);
   private clientsService = inject(ClientsService);
   private kycUpload = inject(KycUploadHelperService);
+  private dialog = inject(MatDialog);
 
   /** Client ID — when set, loads existing addresses for edit mode */
   @Input() clientId: string = '';
@@ -633,33 +636,17 @@ export class ClientIndiaAddressStepComponent implements OnInit, OnChanges {
     });
   }
 
-  /**
-   * Open the saved address proof in a new browser tab.
-   *
-   * For images we already hold a base64 data URL in `previewUrl` from
-   * `loadExistingAddressProof`, so we can hand it straight to `window.open`.
-   * For PDFs / other types we need to fetch the binary blob and create a
-   * temporary object URL so the browser's PDF viewer can render it.
-   */
+  /** Open the saved address proof in an in-app preview dialog. */
   viewExistingAddressProof(): void {
     if (!this.existingAddressProofIdentifierId || this.existingAddressProofDocuments.length === 0) {
       return;
     }
     const doc = this.existingAddressProofDocuments[0];
-    if (doc.previewUrl) {
-      window.open(doc.previewUrl, '_blank', 'noopener');
-      return;
-    }
     this.clientsService.downloadClientIdentificationDocument(this.existingAddressProofIdentifierId, doc.id).subscribe({
-      next: (blob: Blob) => {
-        const url = URL.createObjectURL(blob);
-        const w = window.open(url, '_blank', 'noopener');
-        // Revoke after the tab has had time to load — browsers vary, so
-        // err on the side of a generous wait.
-        if (w) {
-          setTimeout(() => URL.revokeObjectURL(url), 60_000);
-        }
-      },
+      next: (blob: Blob) =>
+        this.dialog.open(DocumentPreviewDialogComponent, {
+          data: { blob, title: doc.fileName || doc.name, fileName: doc.fileName || doc.name }
+        }),
       error: () => {
         // Silent fail — UI shows the saved name so user knows it exists.
       }

src/app/clients/client-stepper/client-kyc-step/client-kyc-step.component.ts

@@ -32,6 +32,7 @@ import { ProofType, normalizeProofType, groupProofsByCategory } from '../../shar
 import { KycUploadHelperService } from '../../shared/kyc-upload-helper.service';
 import { CaptureImageDialogComponent } from '../../clients-view/custom-dialogs/capture-image-dialog/capture-image-dialog.component';
 import { dataUrlToFile } from 'app/shared/utils/data-url.util';
+import { DocumentPreviewDialogComponent } from '../../shared/document-preview-dialog/document-preview-dialog.component';
 
 @Component({
   selector: 'mifosx-client-kyc-step',
@@ -695,30 +696,17 @@ export class ClientKycStepComponent implements OnInit, OnChanges, OnDestroy {
     this.kycDocMergedPreview = null;
   }
 
-  /**
-   * Open the saved KYC ID-proof document in a new browser tab.
-   *
-   * Same flow as the address-step variant: images use the already-loaded
-   * base64 data URL; PDFs (or anything without a cached preview) are fetched
-   * fresh and rendered via a temporary blob URL.
-   */
+  /** Open the saved KYC ID-proof document in an in-app preview dialog. */
   viewExistingKycDoc(): void {
     if (!this.existingKycIdentifierId || this.existingKycDocuments.length === 0) {
       return;
     }
     const doc = this.existingKycDocuments[0];
-    if (doc.previewUrl) {
-      window.open(doc.previewUrl, '_blank', 'noopener');
-      return;
-    }
     this.clientsService.downloadClientIdentificationDocument(this.existingKycIdentifierId, doc.id).subscribe({
-      next: (blob: Blob) => {
-        const url = URL.createObjectURL(blob);
-        const w = window.open(url, '_blank', 'noopener');
-        if (w) {
-          setTimeout(() => URL.revokeObjectURL(url), 60_000);
-        }
-      },
+      next: (blob: Blob) =>
+        this.dialog.open(DocumentPreviewDialogComponent, {
+          data: { blob, title: doc.fileName || doc.name, fileName: doc.fileName || doc.name }
+        }),
       error: () => {
         /* silent — UI still shows the saved filename */
       }

src/app/clients/client-stepper/client-preview-step/client-preview-step.component.html

@@ -195,7 +195,7 @@
                   client.isMinor ? 'preview-badge preview-badge--danger' : 'preview-badge preview-badge--verified'
                 "
               >
-                {{ client.isMinor ? 'Yes (Age < 10)' : 'No' }}
+                {{ client.isMinor ? 'Yes (Age < 18)' : 'No' }}
               </span>
             </span>
           </div>

src/app/clients/clients-view/personal-data-tab/personal-data-tab.component.html

@@ -105,7 +105,7 @@
                   [class.pd-verify-badge--verified]="!clientViewData.isMinor"
                   [class.pd-verify-badge--pending]="clientViewData.isMinor"
                 >
-                  {{ clientViewData.isMinor ? 'Yes (Age < 10)' : 'No' }}
+                  {{ clientViewData.isMinor ? 'Yes (Age < 18)' : 'No' }}
                 </span>
               </div>
             </div>

src/app/clients/edit-client/edit-client.component.ts

@@ -440,6 +440,26 @@ export class EditClientComponent {
           this.savingClient = false;
           this.tabEditMode[tabIndex] = false;
 
+          // Senior Citizen / PWD supporting documents — same pattern as create-client's
+          // post-creation upload, triggered here since these are plain file inputs on the
+          // General step, not part of the JSON update payload.
+          if (this.clientGeneralStep?.seniorCitizenProofFile) {
+            const seniorCitizenProofForm = new FormData();
+            seniorCitizenProofForm.append('file', this.clientGeneralStep.seniorCitizenProofFile);
+            seniorCitizenProofForm.append('name', 'seniorCitizenProof');
+            seniorCitizenProofForm.append('description', 'Senior Citizen Proof (Age/ID Proof)');
+            this.clientsService
+              .uploadClientDocument(this.clientId, seniorCitizenProofForm)
+              .subscribe({ error: () => {} });
+          }
+          if (this.clientGeneralStep?.pwdCertificateFile) {
+            const pwdCertificateForm = new FormData();
+            pwdCertificateForm.append('file', this.clientGeneralStep.pwdCertificateFile);
+            pwdCertificateForm.append('name', 'pwdCertificate');
+            pwdCertificateForm.append('description', 'Disability Certificate');
+            this.clientsService.uploadClientDocument(this.clientId, pwdCertificateForm).subscribe({ error: () => {} });
+          }
+
           // Log mobile/email changes as client notes for risk audit
           this.logFieldChangeNotes(changedFields);
 

src/app/clients/shared/document-preview-dialog/document-preview-dialog.component.html

@@ -0,0 +1,24 @@
+<!--
+  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/.
+-->
+
+<h1 mat-dialog-title>{{ data.title || data.fileName || 'Document Preview' }}</h1>
+
+<div mat-dialog-content class="doc-preview-content">
+  @if (isImage) {
+    <img [src]="previewUrl" [alt]="data.fileName || 'Document'" class="doc-preview-image" />
+  } @else if (isPdf) {
+    <iframe [src]="safeUrl" class="doc-preview-pdf" title="Document preview"></iframe>
+  } @else {
+    <p>Preview isn't available for this file type — use Download to view it.</p>
+  }
+</div>
+
+<mat-dialog-actions align="end">
+  <button mat-raised-button (click)="download()">Download</button>
+  <button mat-raised-button mat-dialog-close color="primary">Close</button>
+</mat-dialog-actions>

src/app/clients/shared/document-preview-dialog/document-preview-dialog.component.scss

@@ -0,0 +1,27 @@
+/**
+ * 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/.
+ */
+
+.doc-preview-content {
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  min-width: 320px;
+  max-width: 80vw;
+}
+
+.doc-preview-image {
+  max-width: 100%;
+  max-height: 70vh;
+  object-fit: contain;
+}
+
+.doc-preview-pdf {
+  width: 70vw;
+  height: 70vh;
+  border: none;
+}

src/app/clients/shared/document-preview-dialog/document-preview-dialog.component.ts

@@ -0,0 +1,81 @@
+/**
+ * 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/.
+ */
+
+/** Angular Imports */
+import { Component, OnDestroy, inject } from '@angular/core';
+import {
+  MatDialogRef,
+  MAT_DIALOG_DATA,
+  MatDialogTitle,
+  MatDialogContent,
+  MatDialogActions,
+  MatDialogClose
+} from '@angular/material/dialog';
+import { DomSanitizer, SafeResourceUrl } from '@angular/platform-browser';
+import { CdkScrollable } from '@angular/cdk/scrolling';
+import { STANDALONE_SHARED_IMPORTS } from 'app/standalone-shared.module';
+
+export interface DocumentPreviewDialogData {
+  blob: Blob;
+  title?: string;
+  fileName?: string;
+}
+
+/**
+ * Generic in-app document preview dialog — shows an image inline or a PDF in an embedded
+ * viewer, with a Download fallback for anything else. Used in place of window.open() for
+ * saved KYC/address/senior-citizen/PWD documents: opening a new browser tab is subject to
+ * popup blockers (fires only after the async download resolves) and, for images, Chrome/Edge
+ * frequently fail to paint a huge base64 data: URL until the tab is manually refreshed.
+ */
+@Component({
+  selector: 'mifosx-document-preview-dialog',
+  templateUrl: './document-preview-dialog.component.html',
+  styleUrls: ['./document-preview-dialog.component.scss'],
+  imports: [
+    ...STANDALONE_SHARED_IMPORTS,
+    MatDialogTitle,
+    CdkScrollable,
+    MatDialogContent,
+    MatDialogActions,
+    MatDialogClose
+  ]
+})
+export class DocumentPreviewDialogComponent implements OnDestroy {
+  dialogRef = inject<MatDialogRef<DocumentPreviewDialogComponent>>(MatDialogRef);
+  private sanitizer = inject(DomSanitizer);
+  data = inject<DocumentPreviewDialogData>(MAT_DIALOG_DATA);
+
+  private readonly objectUrl: string;
+  readonly safeUrl: SafeResourceUrl;
+  readonly isImage: boolean;
+  readonly isPdf: boolean;
+
+  constructor() {
+    this.objectUrl = URL.createObjectURL(this.data.blob);
+    this.safeUrl = this.sanitizer.bypassSecurityTrustResourceUrl(this.objectUrl);
+    const type = this.data.blob.type || '';
+    this.isImage = type.startsWith('image/');
+    this.isPdf = type === 'application/pdf';
+  }
+
+  ngOnDestroy(): void {
+    URL.revokeObjectURL(this.objectUrl);
+  }
+
+  get previewUrl(): string {
+    return this.objectUrl;
+  }
+
+  download(): void {
+    const a = document.createElement('a');
+    a.href = this.objectUrl;
+    a.download = this.data.fileName || 'document';
+    a.click();
+  }
+}