diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7ec8de136c..4bf0e5ae27 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,18 +7,25 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+### Fixed
+
+- Fixed the alignment of the average price in the chart of the holding detail dialog for custom asset profiles
+
+## 3.75.0 - 2026-09-28
+
 ### Changed
 
 - Extended the net performance on the analysis page to include the dividends (experimental)
 - Extended the net performance in the portfolio summary to include the dividends (experimental)
 - Improved the get quotes functionality of the _Manual_ service
+- Migrated the historical market data editor dialog from `ngModel` to form control
 - Migrated the _ESLint_ configuration to the flat config format without `FlatCompat`
 - Upgraded `chartjs-chart-treemap` from version `4.2.0` to `4.2.2`
 
 ### Fixed
 
 - Fixed an issue where holdings without a quote have been valued at the unit price of the latest activity instead of the latest market price
-- Fixed the alignment of the average price in the chart of the holding detail dialog for custom asset profiles
+- Fixed the discovery of the _OpenID Connect_ (`OIDC`) configuration for issuer URLs with a trailing slash (experimental)
 
 ## 3.74.0 - 2026-09-27
 
diff --git a/apps/api/src/app/auth/auth.module.ts b/apps/api/src/app/auth/auth.module.ts
index e2a71ca843..879463cc13 100644
--- a/apps/api/src/app/auth/auth.module.ts
+++ b/apps/api/src/app/auth/auth.module.ts
@@ -22,6 +22,7 @@ import { AuthController } from './auth.controller';
 import { AuthService } from './auth.service';
 import { GoogleStrategy } from './google.strategy';
 import { JwtStrategy } from './jwt.strategy';
+import { getOidcDiscoveryUrl } from './oidc.helper';
 import { OidcStrategy } from './oidc.strategy';
 
 @Module({
@@ -94,9 +95,15 @@ import { OidcStrategy } from './oidc.strategy';
           // Fetch OIDC configuration from discovery endpoint
           try {
             const response = await fetchService.fetch(
-              `${issuer}/.well-known/openid-configuration`
+              getOidcDiscoveryUrl(issuer)
             );
 
+            if (!response.ok) {
+              throw new Error(
+                `OIDC discovery request failed with status ${response.status}`
+              );
+            }
+
             const config = (await response.json()) as {
               authorization_endpoint: string;
               token_endpoint: string;
diff --git a/apps/api/src/app/auth/oidc.helper.spec.ts b/apps/api/src/app/auth/oidc.helper.spec.ts
new file mode 100644
index 0000000000..9234f12c95
--- /dev/null
+++ b/apps/api/src/app/auth/oidc.helper.spec.ts
@@ -0,0 +1,20 @@
+import { getOidcDiscoveryUrl } from './oidc.helper';
+
+describe('getOidcDiscoveryUrl', () => {
+  it.each([
+    [
+      'https://auth.example.com',
+      'https://auth.example.com/.well-known/openid-configuration'
+    ],
+    [
+      'https://auth.example.com/',
+      'https://auth.example.com/.well-known/openid-configuration'
+    ],
+    [
+      'https://auth.example.com/application/o/ghostfolio/',
+      'https://auth.example.com/application/o/ghostfolio/.well-known/openid-configuration'
+    ]
+  ])('creates the discovery URL for %s', (issuer, expected) => {
+    expect(getOidcDiscoveryUrl(issuer)).toBe(expected);
+  });
+});
diff --git a/apps/api/src/app/auth/oidc.helper.ts b/apps/api/src/app/auth/oidc.helper.ts
new file mode 100644
index 0000000000..4e8de829fc
--- /dev/null
+++ b/apps/api/src/app/auth/oidc.helper.ts
@@ -0,0 +1,4 @@
+export function getOidcDiscoveryUrl(issuer: string) {
+  // Remove trailing slashes
+  return `${issuer.replace(/\/+$/, '')}/.well-known/openid-configuration`;
+}
diff --git a/eslint.config.cjs b/eslint.config.cjs
index 9c1b2024b6..1b4aa6a0c0 100644
--- a/eslint.config.cjs
+++ b/eslint.config.cjs
@@ -1,6 +1,7 @@
 const nxEslintPlugin = require('@nx/eslint-plugin');
 const importPlugin = require('eslint-plugin-import');
 const storybook = require('eslint-plugin-storybook');
+const { defineConfig } = require('eslint/config');
 const typescriptEslint = require('typescript-eslint');
 
 module.exports = [
@@ -25,14 +26,12 @@ module.exports = [
           ],
           enforceBuildableLibDependency: true
         }
-      ],
-      '@typescript-eslint/no-extra-semi': 'error',
-      'no-extra-semi': 'off'
+      ]
     }
   },
   ...nxEslintPlugin.configs['flat/typescript'],
   ...nxEslintPlugin.configs['flat/javascript'],
-  ...typescriptEslint.config({
+  ...defineConfig({
     files: ['**/*.ts'],
     plugins: { import: importPlugin },
     extends: [
@@ -91,8 +90,6 @@ module.exports = [
         }
       ],
       '@typescript-eslint/unified-signatures': 'error',
-      '@typescript-eslint/no-loss-of-precision': 'warn',
-      '@typescript-eslint/no-var-requires': 'warn',
       'arrow-body-style': 'off',
       'constructor-super': 'error',
       eqeqeq: ['error', 'smart'],
diff --git a/libs/ui/src/lib/historical-market-data-editor/historical-market-data-editor-dialog/historical-market-data-editor-dialog.component.ts b/libs/ui/src/lib/historical-market-data-editor/historical-market-data-editor-dialog/historical-market-data-editor-dialog.component.ts
index 1b7b99fa21..17a5a5e612 100644
--- a/libs/ui/src/lib/historical-market-data-editor/historical-market-data-editor-dialog/historical-market-data-editor-dialog.component.ts
+++ b/libs/ui/src/lib/historical-market-data-editor/historical-market-data-editor-dialog/historical-market-data-editor-dialog.component.ts
@@ -7,11 +7,15 @@ import {
   CUSTOM_ELEMENTS_SCHEMA,
   DestroyRef,
   OnInit,
-  inject,
-  signal
+  inject
 } from '@angular/core';
 import { takeUntilDestroyed } from '@angular/core/rxjs-interop';
-import { FormsModule, ReactiveFormsModule } from '@angular/forms';
+import {
+  FormControl,
+  FormGroup,
+  ReactiveFormsModule,
+  Validators
+} from '@angular/forms';
 import { MatButtonModule } from '@angular/material/button';
 import { DateAdapter, MAT_DATE_LOCALE } from '@angular/material/core';
 import { MatDatepickerModule } from '@angular/material/datepicker';
@@ -33,7 +37,6 @@ import { HistoricalMarketDataEditorDialogParams } from './interfaces/interfaces'
   changeDetection: ChangeDetectionStrategy.OnPush,
   host: { class: 'h-100' },
   imports: [
-    FormsModule,
     IonIcon,
     MatButtonModule,
     MatDatepickerModule,
@@ -51,7 +54,10 @@ export class GfHistoricalMarketDataEditorDialogComponent implements OnInit {
   public readonly data =
     inject<HistoricalMarketDataEditorDialogParams>(MAT_DIALOG_DATA);
 
-  protected readonly marketPrice = signal(this.data.marketPrice);
+  protected readonly historicalMarketDataForm = new FormGroup({
+    date: new FormControl({ disabled: true, value: this.data.dateString }),
+    marketPrice: new FormControl(this.data.marketPrice, Validators.required)
+  });
 
   private readonly destroyRef = inject(DestroyRef);
   private readonly locale =
@@ -84,14 +90,19 @@ export class GfHistoricalMarketDataEditorDialogComponent implements OnInit {
       })
       .pipe(takeUntilDestroyed(this.destroyRef))
       .subscribe(({ marketPrice }) => {
-        this.marketPrice.set(marketPrice);
+        this.historicalMarketDataForm.controls.marketPrice.setValue(
+          marketPrice
+        );
+
+        this.historicalMarketDataForm.controls.marketPrice.markAsDirty();
 
         this.changeDetectorRef.markForCheck();
       });
   }
 
   public onUpdate() {
-    const marketPrice = this.marketPrice();
+    const marketPrice =
+      this.historicalMarketDataForm.controls.marketPrice.value;
 
     if (isNil(marketPrice)) {
       return;
diff --git a/libs/ui/src/lib/historical-market-data-editor/historical-market-data-editor-dialog/historical-market-data-editor-dialog.html b/libs/ui/src/lib/historical-market-data-editor/historical-market-data-editor-dialog/historical-market-data-editor-dialog.html
index 7e81836646..6e52114058 100644
--- a/libs/ui/src/lib/historical-market-data-editor/historical-market-data-editor-dialog/historical-market-data-editor-dialog.html
+++ b/libs/ui/src/lib/historical-market-data-editor/historical-market-data-editor-dialog/historical-market-data-editor-dialog.html
@@ -1,16 +1,14 @@
-<form class="d-flex flex-column h-100">
+<form
+  class="d-flex flex-column h-100"
+  [formGroup]="historicalMarketDataForm"
+  (ngSubmit)="onUpdate()"
+>
   <h1 i18n mat-dialog-title>Details for {{ data.symbol }}</h1>
   <div class="flex-grow-1 py-3" mat-dialog-content>
     <div class="mb-3">
       <mat-form-field appearance="outline" class="w-100">
         <mat-label i18n>Date</mat-label>
-        <input
-          disabled
-          matInput
-          name="date"
-          [matDatepicker]="date"
-          [(ngModel)]="data.dateString"
-        />
+        <input formControlName="date" matInput [matDatepicker]="date" />
         <mat-datepicker-toggle class="mr-2" matSuffix [for]="date">
           <ion-icon
             class="text-muted"
@@ -24,13 +22,7 @@
     <div class="align-items-start d-flex">
       <mat-form-field appearance="outline" class="w-100">
         <mat-label i18n>Market Price</mat-label>
-        <input
-          matInput
-          name="marketPrice"
-          type="number"
-          [ngModel]="marketPrice()"
-          (ngModelChange)="marketPrice.set($event)"
-        />
+        <input formControlName="marketPrice" matInput type="number" />
         <span class="ml-2" matTextSuffix>{{ data.currency }}</span>
       </mat-form-field>
       <button
@@ -38,6 +30,7 @@
         i18n-title
         mat-button
         title="Fetch market price"
+        type="button"
         (click)="onFetchSymbolForDate()"
       >
         <ion-icon class="text-muted" name="refresh-outline" />
@@ -45,8 +38,15 @@
     </div>
   </div>
   <div class="justify-content-end" mat-dialog-actions>
-    <button i18n mat-button (click)="onCancel()">Cancel</button>
-    <button color="primary" mat-flat-button (click)="onUpdate()">
+    <button i18n mat-button type="button" (click)="onCancel()">Cancel</button>
+    <button
+      color="primary"
+      mat-flat-button
+      type="submit"
+      [disabled]="
+        !(historicalMarketDataForm.dirty && historicalMarketDataForm.valid)
+      "
+    >
       <ng-container i18n>Save</ng-container>
     </button>
   </div>
diff --git a/nx.json b/nx.json
index 3b8c3846a1..e0a41e9835 100644
--- a/nx.json
+++ b/nx.json
@@ -98,6 +98,7 @@
       "cache": true
     },
     "lint": {
+      "inputs": ["default", "^default", "{workspaceRoot}/eslint.config.cjs"],
       "cache": true
     },
     "@nx/jest:jest": {
diff --git a/package-lock.json b/package-lock.json
index c4896f0436..3f8ee0f880 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "ghostfolio",
-  "version": "3.74.0",
+  "version": "3.75.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "ghostfolio",
-      "version": "3.74.0",
+      "version": "3.75.0",
       "hasInstallScript": true,
       "license": "AGPL-3.0",
       "dependencies": {
@@ -152,8 +152,6 @@
         "@types/papaparse": "5.5.2",
         "@types/passport-google-oauth20": "2.0.17",
         "@types/passport-openidconnect": "0.1.3",
-        "@typescript-eslint/eslint-plugin": "8.67.0",
-        "@typescript-eslint/parser": "8.67.0",
         "eslint": "9.35.0",
         "eslint-config-prettier": "10.1.8",
         "eslint-plugin-import": "2.32.0",
diff --git a/package.json b/package.json
index 3361c354ba..a3f94b74b6 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ghostfolio",
-  "version": "3.74.0",
+  "version": "3.75.0",
   "homepage": "https://ghostfol.io",
   "license": "AGPL-3.0",
   "repository": "https://github.com/ghostfolio/ghostfolio",
@@ -196,8 +196,6 @@
     "@types/papaparse": "5.5.2",
     "@types/passport-google-oauth20": "2.0.17",
     "@types/passport-openidconnect": "0.1.3",
-    "@typescript-eslint/eslint-plugin": "8.67.0",
-    "@typescript-eslint/parser": "8.67.0",
     "eslint": "9.35.0",
     "eslint-config-prettier": "10.1.8",
     "eslint-plugin-import": "2.32.0",