chore: Dioxus-0.7-Projekt mit Tailwind-Setup aufsetzen

Cargo-, Dioxus- und Tailwind-Konfiguration, Clippy-Regeln, Assets und
Stylesheets (tokens/base/layout/components). Cargo.lock wird eingecheckt,
da es sich um ein Binary-Crate handelt.

node_modules/ und .idea/ per .gitignore ausgeschlossen.

assets/css/base.css

@@ -0,0 +1,172 @@
+/* ==========================================================================
+   Baseline — reset and element defaults. No component styling below this line.
+   ========================================================================== */
+
+*,
+*::before,
+*::after {
+    box-sizing: border-box;
+}
+
+* {
+    margin: 0;
+}
+
+html {
+    color-scheme: dark;
+    -webkit-text-size-adjust: 100%;
+    /* App chrome should not feel like a document. */
+    -webkit-user-select: none;
+    user-select: none;
+}
+
+body {
+    min-height: 100dvh;
+    background-color: var(--dn-bg-app);
+    color: var(--dn-fg);
+    font-family: var(--dn-font-ui);
+    font-size: var(--dn-text-base);
+    line-height: var(--dn-leading-normal);
+    -webkit-font-smoothing: antialiased;
+    text-rendering: optimizeLegibility;
+    overflow: hidden; /* the editor and sidebar scroll, the shell does not */
+}
+
+/* Text the user is meant to read or copy opts back in. */
+input,
+textarea,
+[contenteditable],
+.selectable {
+    -webkit-user-select: text;
+    user-select: text;
+}
+
+/* --- Typographic elements ------------------------------------------------- */
+
+h1, h2, h3, h4 {
+    font-weight: 600;
+    line-height: var(--dn-leading-tight);
+    text-wrap: balance;
+}
+
+h1 { font-size: var(--dn-text-xl); }
+h2 { font-size: var(--dn-text-lg); }
+h3 { font-size: var(--dn-text-md); }
+h4 { font-size: var(--dn-text-base); }
+
+p {
+    text-wrap: pretty;
+    max-width: var(--dn-measure);
+}
+
+small {
+    font-size: var(--dn-text-xs);
+    color: var(--dn-fg-muted);
+}
+
+code, kbd, samp, pre {
+    font-family: var(--dn-font-code);
+    font-size: 0.9375em;
+}
+
+hr {
+    border: 0;
+    border-top: 1px solid var(--dn-border);
+}
+
+a {
+    color: var(--dn-accent);
+    text-decoration-color: var(--dn-accent-muted);
+    text-underline-offset: 2px;
+    transition: color var(--dn-dur-fast) var(--dn-ease);
+}
+
+a:hover {
+    text-decoration-color: currentColor;
+}
+
+/* --- Form and media defaults ---------------------------------------------- */
+
+img, svg, video, canvas {
+    display: block;
+    max-width: 100%;
+}
+
+button, input, select, textarea {
+    font: inherit;
+    color: inherit;
+}
+
+button {
+    background: none;
+    border: 0;
+    padding: 0;
+    cursor: pointer;
+}
+
+:disabled {
+    opacity: 0.5;
+    cursor: not-allowed;
+}
+
+::placeholder {
+    color: var(--dn-fg-faint);
+}
+
+::selection {
+    background: var(--dn-accent-muted);
+    color: var(--dn-fg);
+}
+
+/* --- Focus ---------------------------------------------------------------- */
+
+:focus-visible {
+    outline: 2px solid var(--dn-accent);
+    outline-offset: 2px;
+    border-radius: var(--dn-radius-sm);
+}
+
+:focus:not(:focus-visible) {
+    outline: none;
+}
+
+/* --- Scrollbars ------------------------------------------------------------ */
+
+* {
+    scrollbar-width: thin;
+    scrollbar-color: var(--dn-border-strong) transparent;
+}
+
+::-webkit-scrollbar {
+    width: 10px;
+    height: 10px;
+}
+
+::-webkit-scrollbar-track {
+    background: transparent;
+}
+
+::-webkit-scrollbar-thumb {
+    background: var(--dn-border);
+    border: 3px solid transparent;
+    background-clip: content-box;
+    border-radius: 999px;
+}
+
+::-webkit-scrollbar-thumb:hover {
+    background: var(--dn-border-strong);
+    background-clip: content-box;
+}
+
+/* --- Reduced motion --------------------------------------------------------- */
+
+@media (prefers-reduced-motion: reduce) {
+    *,
+    *::before,
+    *::after {
+        animation-duration: 0.01ms !important;
+        animation-iteration-count: 1 !important;
+        transition-duration: 0.01ms !important;
+        scroll-behavior: auto !important;
+    }
+}