fix: performance

AGENTS.md

@@ -0,0 +1,61 @@
+# Repository Guidelines
+
+## Project Structure & Module Organization
+
+`src/` contains the Angular application, SSR entry points, and global styles.
+Feature code lives under `src/app/` with standalone components such as `home/`,
+`imprint/`, `footer/`, and shared services in `src/app/services/`. Language
+packs and shared language types are in `src/languages/`. Source images belong in
+`src/assets/unoptimized/`; generated web assets are written to
+`src/assets/optimized/`. Utility and generation scripts live in `scripts/`. CI
+workflows and issue templates are under `.github/`.
+
+## Build, Test, and Development Commands
+
+Use npm scripts only.
+
+- `npm run dev` starts the local Angular dev server after generating assets.
+- `npm run test` runs the Angular/Karma test suite.
+- `npm run check` runs the repository validation pipeline.
+- `npm run fix` applies automatic fixes for version placeholders, ESLint issues,
+  text cleanup, and formatting.
+- `npm run lint` runs base and type-aware ESLint checks.
+- `npm run format:check` verifies Prettier formatting.
+
+For validation, use `npm run check` and `npm run test`. Do not run
+`npm run build` directly.
+
+## Coding Style & Naming Conventions
+
+Use TypeScript with strict typing. Prefer `type`, `interface`, and `enum`
+deliberately; do not use `any` or `unknown` unless unavoidable and justified.
+`var` is forbidden. Only mark values nullable when `null` is a real runtime
+state. Always declare the correct access modifier (`private`, `protected`,
+`public`) explicitly when it improves clarity.
+
+Formatting is enforced with Prettier and ESLint. Follow existing conventions:
+2-space indentation, single quotes, semicolons, readonly where appropriate, and
+Angular standalone components with files named
+`feature.component.ts|html|spec.ts`.
+
+## Testing Guidelines
+
+Tests use Jasmine with Karma and live beside implementation files as
+`*.spec.ts`. Add or update tests when changing component behavior, services,
+routing, or asset-generation logic. Prefer focused unit tests over broad
+integration-style setup. Run `npm run test` locally before opening a PR.
+
+## Commit & Pull Request Guidelines
+
+Recent history favors short conventional-style subjects such as
+`fix: performance`, `fix: text`, and `feat: added languages`. Keep commits
+scoped and imperative. PRs should include a concise summary, linked issue when
+relevant, validation notes (`npm run check`, `npm run test`), and screenshots
+for UI changes, especially mobile or performance-related updates.
+
+## Asset & Content Notes
+
+Do not edit generated optimized assets by hand. Update the source files in
+`src/assets/unoptimized/` and regenerate through the provided scripts. Keep
+localized text changes synchronized between `src/languages/de.ts` and
+`src/languages/en.ts`.

src/app/app.component.ts

@@ -37,7 +37,7 @@ export class AppComponent implements OnInit, OnDestroy {
     { code: 'de', accent: 'DE' },
   ];
   protected readonly dialogContent = computed(() =>
-    this.languageService.getPack(this.selectedLanguage()),
+    this.languageService.getShellPack(this.selectedLanguage()),
   );
   protected readonly languageSwitcherLabel = computed(() =>
     this.getLanguageLabel(this.currentLanguageCode(), this.content()),
@@ -66,6 +66,7 @@ export class AppComponent implements OnInit, OnDestroy {
   protected confirmLanguage(): void {
     this.languageService.confirmLanguage(this.selectedLanguage());
     this.isLanguageSelectorOpen.set(false);
+    this.kofiWidgetService.prioritizeLoad();
   }
 
   protected reopenLanguageSelector(): void {
@@ -80,6 +81,7 @@ export class AppComponent implements OnInit, OnDestroy {
 
     this.selectedLanguage.set(this.currentLanguageCode());
     this.isLanguageSelectorOpen.set(false);
+    this.kofiWidgetService.prioritizeLoad();
   }
 
   protected closeLanguageSelectorOnBackdrop(event: MouseEvent): void {

src/app/home/home.component.ts

@@ -1,5 +1,5 @@
 import type { AfterViewInit, OnDestroy, OnInit } from '@angular/core';
-import { ChangeDetectionStrategy, Component, inject, NgZone } from '@angular/core';
+import { ChangeDetectionStrategy, Component, computed, inject, NgZone } from '@angular/core';
 import { NgOptimizedImage } from '@angular/common';
 import { faArrowRight, faArrowDown, faEnvelope, faPhone } from '@fortawesome/free-solid-svg-icons';
 import { faDiscord, faGithub, faLinkedin } from '@fortawesome/free-brands-svg-icons';
@@ -8,9 +8,12 @@ import { FaIconComponent } from '@fortawesome/angular-fontawesome';
 import type { Subscription } from 'rxjs';
 import { interval } from 'rxjs';
 
+import { deLanguage } from '../../languages/de';
+import { enLanguage } from '../../languages/en';
 import { global } from '../../global';
 import type {
   LanguageBioTextEntry,
+  LanguagePack,
   LanguagePortraitHighlight,
   LanguageProject,
 } from '../../languages/language.types';
@@ -27,7 +30,9 @@ import { LanguageService } from '../services/language.service';
 export class HomeComponent implements OnInit, AfterViewInit, OnDestroy {
   private readonly zone = inject(NgZone);
   private readonly languageService = inject(LanguageService);
-  protected readonly content = this.languageService.content;
+  protected readonly content = computed<LanguagePack>(() =>
+    this.languageService.languageCode() === 'de' ? deLanguage : enLanguage,
+  );
 
   private scrollAnimationFrameId: number | null = null;
   private projectEntryAnimationFrameId: number | null = null;
@@ -174,14 +179,27 @@ export class HomeComponent implements OnInit, AfterViewInit, OnDestroy {
   protected scrollToContactLinks(): void {
     this.scrollToElementById('contact-links', this.getResponsiveScrollOffset(0.05));
   }
+
+  private shouldEnableScrollEffects(): boolean {
+    if (typeof window === 'undefined') return false;
+
+    const isSmallViewport: boolean = window.innerWidth <= 700;
+    const prefersReducedMotion: boolean = window.matchMedia(
+      '(prefers-reduced-motion: reduce)',
+    ).matches;
+    const isCoarsePointer: boolean = window.matchMedia('(pointer: coarse)').matches;
+
+    return !isSmallViewport && !prefersReducedMotion && !isCoarsePointer;
+  }
+
   private initNameGradientScrollAnimation(): void {
-    if (typeof window === 'undefined') return;
+    if (!this.shouldEnableScrollEffects()) return;
     window.addEventListener('scroll', this.scheduleNameGradientUpdate, { passive: true });
     window.addEventListener('resize', this.scheduleNameGradientUpdate, { passive: true });
     this.scheduleNameGradientUpdate();
   }
   private initProjectEntryRevealObserver(): void {
-    if (typeof window === 'undefined') return;
+    if (!this.shouldEnableScrollEffects()) return;
     window.addEventListener('scroll', this.scheduleProjectEntryRevealUpdate, { passive: true });
     window.addEventListener('resize', this.scheduleProjectEntryRevealUpdate, { passive: true });
     this.scheduleProjectEntryRevealUpdate();
@@ -199,7 +217,7 @@ export class HomeComponent implements OnInit, AfterViewInit, OnDestroy {
     });
   }
   private initAboutSectionScrollAnimation(): void {
-    if (typeof window === 'undefined') return;
+    if (!this.shouldEnableScrollEffects()) return;
     window.addEventListener('scroll', this.scheduleAboutSectionScrollAnimationUpdate, {
       passive: true,
     });

src/app/imprint/imprint.component.ts

@@ -1,10 +1,13 @@
-import { ChangeDetectionStrategy, Component, inject } from '@angular/core';
+import { ChangeDetectionStrategy, Component, computed, inject } from '@angular/core';
 import { RouterLink } from '@angular/router';
 import type { IconDefinition } from '@fortawesome/angular-fontawesome';
 import { FaIconComponent } from '@fortawesome/angular-fontawesome';
 import { faArrowLeft } from '@fortawesome/free-solid-svg-icons';
 
+import { deLanguage } from '../../languages/de';
+import { enLanguage } from '../../languages/en';
 import { global } from '../../global';
+import type { LanguagePack } from '../../languages/language.types';
 import { FooterComponent } from '../footer/footer.component';
 import { LanguageService } from '../services/language.service';
 
@@ -18,7 +21,9 @@ import { LanguageService } from '../services/language.service';
 export class ImprintComponent {
   private readonly languageService = inject(LanguageService);
 
-  protected readonly content = this.languageService.content;
+  protected readonly content = computed<LanguagePack>(() =>
+    this.languageService.languageCode() === 'de' ? deLanguage : enLanguage,
+  );
   protected readonly global = global;
   protected readonly faArrowLeft: IconDefinition = faArrowLeft;
   protected readonly contactMailHref = `mailto:${global.contactMail}`;

src/app/services/kofi-widget.service.ts

@@ -8,11 +8,14 @@ export class KofiWidgetService {
 
   private readonly widgetScriptUrl = 'https://storage.ko-fi.com/cdn/scripts/overlay-widget.js';
   private readonly widgetIframeTitle = 'Ko-fi support chat';
-  private readonly fallbackDelayMs = 10000;
+  private readonly fallbackDelayMs = 2500;
+  private readonly mobileBreakpointPx = 700;
+  private readonly mobileViewportOffsetPx = 24;
 
   private loadTimeoutId: number | null = null;
   private loadIdleCallbackId: number | null = null;
   private loadListenerAbortController: AbortController | null = null;
+  private resizeListenerAbortController: AbortController | null = null;
   private iframeObserver: MutationObserver | null = null;
   private isWidgetScheduled = false;
   private isWidgetLoaded = false;
@@ -85,10 +88,50 @@ export class KofiWidgetService {
     }
   }
 
-  teardown(): void {
+  prioritizeLoad(): void {
+    if (!isPlatformBrowser(this.platformId) || this.isWidgetLoaded || this.isWidgetDrawn) {
+      return;
+    }
+
     const windowRef = this.document.defaultView;
+    if (windowRef === null) {
+      return;
+    }
 
     this.clearStartListeners();
+    this.clearPendingLoadTimers();
+
+    const loadWidget = (): void => {
+      this.loadIdleCallbackId = null;
+      this.loadTimeoutId = null;
+      void this.loadWidget();
+    };
+
+    if (typeof windowRef.requestIdleCallback === 'function') {
+      this.loadIdleCallbackId = windowRef.requestIdleCallback(loadWidget, { timeout: 1200 });
+      return;
+    }
+
+    this.loadTimeoutId = windowRef.setTimeout(loadWidget, 200);
+  }
+
+  teardown(): void {
+    this.clearStartListeners();
+    this.resizeListenerAbortController?.abort();
+    this.resizeListenerAbortController = null;
+    this.clearPendingLoadTimers();
+
+    this.iframeObserver?.disconnect();
+    this.iframeObserver = null;
+  }
+
+  private clearStartListeners(): void {
+    this.loadListenerAbortController?.abort();
+    this.loadListenerAbortController = null;
+  }
+
+  private clearPendingLoadTimers(): void {
+    const windowRef = this.document.defaultView;
 
     if (windowRef !== null && this.loadTimeoutId !== null) {
       windowRef.clearTimeout(this.loadTimeoutId);
@@ -103,14 +146,6 @@ export class KofiWidgetService {
       windowRef.cancelIdleCallback(this.loadIdleCallbackId);
       this.loadIdleCallbackId = null;
     }
-
-    this.iframeObserver?.disconnect();
-    this.iframeObserver = null;
-  }
-
-  private clearStartListeners(): void {
-    this.loadListenerAbortController?.abort();
-    this.loadListenerAbortController = null;
   }
 
   private async loadWidget(): Promise<void> {
@@ -190,7 +225,9 @@ export class KofiWidgetService {
 
     this.isWidgetDrawn = true;
     this.ensureAccessibleIframeTitles();
+    this.applyResponsiveWidgetLayout();
     this.observeInjectedIframes();
+    this.observeViewportChanges();
   }
 
   private ensureAccessibleIframeTitles(): void {
@@ -201,6 +238,75 @@ export class KofiWidgetService {
       });
   }
 
+  private applyResponsiveWidgetLayout(): void {
+    const windowRef = this.document.defaultView;
+    if (windowRef === null) {
+      return;
+    }
+
+    const isMobileViewport: boolean = windowRef.innerWidth <= this.mobileBreakpointPx;
+    const mobileWidthPx: number = Math.max(windowRef.innerWidth - this.mobileViewportOffsetPx, 280);
+    const mobileHeightPx: number = Math.max(
+      Math.min(Math.round(windowRef.innerHeight * 0.68), 520),
+      360,
+    );
+
+    this.document
+      .querySelectorAll<HTMLElement>('[id*="kofi-widget-overlay"]')
+      .forEach((overlay: HTMLElement): void => {
+        if (isMobileViewport) {
+          overlay.style.left = '12px';
+          overlay.style.right = '12px';
+          overlay.style.bottom = '12px';
+          overlay.style.width = 'auto';
+          overlay.style.maxWidth = `${mobileWidthPx}px`;
+        } else {
+          overlay.style.removeProperty('left');
+          overlay.style.removeProperty('right');
+          overlay.style.removeProperty('width');
+          overlay.style.removeProperty('max-width');
+        }
+      });
+
+    this.document
+      .querySelectorAll<HTMLElement>(
+        '.floatingchat-container-wrap, .floatingchat-container-wrap-mobi',
+      )
+      .forEach((container: HTMLElement): void => {
+        if (isMobileViewport) {
+          container.style.width = `${mobileWidthPx}px`;
+          container.style.maxWidth = 'calc(100vw - 24px)';
+          container.style.left = '0';
+          container.style.right = '0';
+        } else {
+          container.style.removeProperty('width');
+          container.style.removeProperty('max-width');
+          container.style.removeProperty('left');
+          container.style.removeProperty('right');
+        }
+      });
+
+    this.document
+      .querySelectorAll<HTMLIFrameElement>('iframe[id^="kofi-wo-container"]')
+      .forEach((iframe: HTMLIFrameElement): void => {
+        iframe.title = this.widgetIframeTitle;
+
+        if (isMobileViewport) {
+          iframe.style.width = `${mobileWidthPx}px`;
+          iframe.style.maxWidth = 'calc(100vw - 24px)';
+          iframe.style.height = `${mobileHeightPx}px`;
+          iframe.style.maxHeight = '68vh';
+          iframe.style.borderRadius = '18px';
+        } else {
+          iframe.style.removeProperty('width');
+          iframe.style.removeProperty('max-width');
+          iframe.style.removeProperty('height');
+          iframe.style.removeProperty('max-height');
+          iframe.style.removeProperty('border-radius');
+        }
+      });
+  }
+
   private observeInjectedIframes(): void {
     if (this.iframeObserver !== null) {
       return;
@@ -208,6 +314,7 @@ export class KofiWidgetService {
 
     this.iframeObserver = new MutationObserver((): void => {
       this.ensureAccessibleIframeTitles();
+      this.applyResponsiveWidgetLayout();
     });
 
     this.iframeObserver.observe(this.document.body, {
@@ -215,4 +322,29 @@ export class KofiWidgetService {
       subtree: true,
     });
   }
+
+  private observeViewportChanges(): void {
+    if (this.resizeListenerAbortController !== null) {
+      return;
+    }
+
+    const windowRef = this.document.defaultView;
+    if (windowRef === null) {
+      return;
+    }
+
+    this.resizeListenerAbortController = new AbortController();
+    const listenerOptions: AddEventListenerOptions = {
+      passive: true,
+      signal: this.resizeListenerAbortController.signal,
+    };
+
+    windowRef.addEventListener(
+      'resize',
+      (): void => {
+        this.applyResponsiveWidgetLayout();
+      },
+      listenerOptions,
+    );
+  }
 }

src/app/services/language.service.ts

@@ -1,8 +1,36 @@
 import { Injectable, computed, signal } from '@angular/core';
 
-import { deLanguage } from '../../languages/de';
+import type { LanguageCode, LanguageShellPack } from '../../languages/language.types';
-import { enLanguage } from '../../languages/en';
+
-import type { LanguageCode, LanguagePack } from '../../languages/language.types';
+const enShellLanguage: LanguageShellPack = {
+  app: {
+    selectorTitle: 'Select language',
+    changeLanguage: 'Language',
+    changeLanguageAriaLabel: 'Change language',
+    closeSelector: 'Close language selection',
+    languageEnglish: 'English',
+    languageGerman: 'German',
+  },
+  footer: {
+    noscriptMessage: 'Please enable JavaScript for the full experience.',
+    imprintLink: 'Imprint',
+  },
+};
+
+const deShellLanguage: LanguageShellPack = {
+  app: {
+    selectorTitle: 'Sprache wählen',
+    changeLanguage: 'Sprache',
+    changeLanguageAriaLabel: 'Sprache wechseln',
+    closeSelector: 'Sprachauswahl schliessen',
+    languageEnglish: 'Englisch',
+    languageGerman: 'Deutsch',
+  },
+  footer: {
+    noscriptMessage: 'Bitte aktiviere JavaScript für die volle Darstellung.',
+    imprintLink: 'Impressum',
+  },
+};
 
 @Injectable({ providedIn: 'root' })
 export class LanguageService {
@@ -12,7 +40,9 @@ export class LanguageService {
 
   readonly languageCode = this.currentLanguageCode.asReadonly();
   readonly isLanguageConfirmed = this.languageConfirmed.asReadonly();
-  readonly content = computed<LanguagePack>(() => this.getPack(this.currentLanguageCode()));
+  readonly content = computed<LanguageShellPack>(() =>
+    this.getShellPack(this.currentLanguageCode()),
+  );
 
   initializeFromStorage(): LanguageCode {
     if (typeof window === 'undefined') {
@@ -37,7 +67,7 @@ export class LanguageService {
     }
   }
 
-  getPack(code: LanguageCode): LanguagePack {
+  getShellPack(code: LanguageCode): LanguageShellPack {
-    return code === 'de' ? deLanguage : enLanguage;
+    return code === 'de' ? deShellLanguage : enShellLanguage;
   }
 }

src/languages/language.types.ts

@@ -93,3 +93,5 @@ export interface LanguagePack {
   portraitHighlights: LanguagePortraitHighlight[];
   projects: LanguageProject[];
 }
+
+export type LanguageShellPack = Pick<LanguagePack, 'app' | 'footer'>;

src/styles.scss

@@ -34,6 +34,8 @@
 html {
   scroll-behavior: smooth;
   overflow-x: clip;
+  background-color: #08080b;
+  overscroll-behavior-x: none;
 }
 
 html.no-js {
@@ -60,11 +62,13 @@ body {
   font-family: 'Outfit', Arial, sans-serif;
   color: var(--text-primary);
   overflow-x: clip;
+  background-color: #08080b;
   background:
     radial-gradient(circle at top left, rgba(217, 162, 140, 0.22), transparent 26%),
     radial-gradient(circle at bottom right, rgba(127, 78, 63, 0.28), transparent 28%),
     linear-gradient(180deg, rgba(9, 9, 12, 0.4), rgba(8, 8, 11, 0.82)),
     url('assets/optimized/background.webp') center / cover fixed no-repeat;
+  -webkit-overflow-scrolling: touch;
 }
 
 a {
@@ -859,6 +863,8 @@ hr {
 
 .site-footer {
   padding: 0 0 var(--space-6);
+  content-visibility: auto;
+  contain-intrinsic-size: 1px 180px;
 }
 
 .footer-shell {
@@ -932,6 +938,18 @@ hr {
 }
 
 @media (max-width: 700px) {
+  html {
+    scroll-behavior: auto;
+  }
+
+  body {
+    background:
+      radial-gradient(circle at top left, rgba(217, 162, 140, 0.18), transparent 28%),
+      radial-gradient(circle at bottom right, rgba(127, 78, 63, 0.24), transparent 32%),
+      linear-gradient(180deg, rgba(9, 9, 12, 0.72), rgba(8, 8, 11, 0.96)),
+      url('assets/optimized/background.webp') center top / cover no-repeat;
+  }
+
   .page-shell,
   .footer-inner {
     width: min(calc(100% - 2rem), var(--page-max-width));
@@ -1069,6 +1087,102 @@ hr {
     box-shadow: none;
     justify-items: center;
   }
+
+  .panel,
+  .language-overlay,
+  .language-switcher {
+    backdrop-filter: none;
+  }
+
+  .panel {
+    background: linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.025)), rgba(12, 12, 16, 0.88);
+  }
+
+  .project-entry,
+  .about-scroll-anim-enabled .story-copy,
+  .about-scroll-anim-enabled .story-detail {
+    opacity: 1;
+    transform: none;
+    will-change: auto;
+  }
+
+  .project-entry {
+    transition:
+      border-color var(--transition-fast),
+      background var(--transition-fast);
+  }
+
+  .projects-section,
+  .story-section,
+  .legal-section {
+    content-visibility: auto;
+    contain-intrinsic-size: 1px 720px;
+  }
+}
+
+@media (hover: none) and (pointer: coarse) {
+  .action-link:hover,
+  .detail-toggle:hover,
+  .back-link:hover,
+  .contact-area a:hover,
+  .project-entry.project-entry-from-right:hover,
+  .project-entry.project-entry-from-left:hover,
+  .language-close:hover,
+  .language-switcher:hover,
+  .portrait-highlight-button:hover {
+    transform: none;
+    box-shadow: none;
+    background: inherit;
+    border-color: inherit;
+  }
+
+  .action-link-pride:hover::before {
+    animation: none;
+    background: linear-gradient(
+        to right,
+        #e40303 0%,
+        #e40303 16.66%,
+        #ff8c00 16.66%,
+        #ff8c00 33.33%,
+        #ffed00 33.33%,
+        #ffed00 50%,
+        #008026 50%,
+        #008026 66.66%,
+        #004dff 66.66%,
+        #004dff 83.33%,
+        #750787 83.33%,
+        #750787 100%
+      )
+      0 50%;
+    background-size: 100% 100%;
+  }
+}
+
+@media (prefers-reduced-motion: reduce) {
+  html {
+    scroll-behavior: auto;
+  }
+
+  .portrait-media-switching,
+  .action-link-pride:hover::before {
+    animation: none;
+  }
+
+  .project-entry,
+  .about-scroll-anim-enabled .story-copy,
+  .about-scroll-anim-enabled .story-detail,
+  .detail-panel,
+  .action-link,
+  .detail-toggle,
+  .back-link,
+  .contact-area a,
+  .language-close,
+  .language-switcher,
+  .portrait-highlight-button {
+    transition: none;
+    transform: none;
+    will-change: auto;
+  }
 }
 .language-overlay {
   position: fixed;