feat: vylepšená podpora themes

client/src/components/Header.tsx

@@ -2,7 +2,8 @@ import { useEffect, useState } from "react";
 import { Navbar, Nav, NavDropdown, Modal, Button } from "react-bootstrap";
 import { useAuth } from "../context/auth";
 import SettingsModal from "./modals/SettingsModal";
-import { useSettings, ThemePreference, ColorTheme } from "../context/settings";
+import { useSettings, ThemePreference } from "../context/settings";
+import HuePicker from "./HuePicker";
 import FeaturesVotingModal from "./modals/FeaturesVotingModal";
 import PizzaCalculatorModal from "./modals/PizzaCalculatorModal";
 import RefreshMenuModal from "./modals/RefreshMenuModal";
@@ -13,7 +14,7 @@ import { useNavigate } from "react-router";
 import { STATS_URL, OBJEDNANI_URL } from "../AppRoutes";
 import { FeatureRequest, getVotes, updateVote, LunchChoices, getChangelogs } from "../../../types";
 import { FontAwesomeIcon } from "@fortawesome/react-fontawesome";
-import { faSun, faMoon, faPalette } from "@fortawesome/free-solid-svg-icons";
+import { faSun, faMoon } from "@fortawesome/free-solid-svg-icons";
 import { formatDateString } from "../Utils";
 
 const LAST_SEEN_CHANGELOG_KEY = "lastChangelogDate";
@@ -40,25 +41,7 @@ export default function Header({ choices, dayIndex }: Props) {
     const [clearMockModalOpen, setClearMockModalOpen] = useState<boolean>(false);
     const [featureVotes, setFeatureVotes] = useState<FeatureRequest[] | undefined>([]);
 
-    // Zjistíme aktuální efektivní téma (pro zobrazení správné ikony)
-    const [effectiveTheme, setEffectiveTheme] = useState<'light' | 'dark'>('light');
-
-    useEffect(() => {
-        const updateEffectiveTheme = () => {
-            if (settings?.themePreference === 'system') {
-                const isDark = window.matchMedia('(prefers-color-scheme: dark)').matches;
-                setEffectiveTheme(isDark ? 'dark' : 'light');
-            } else {
-                setEffectiveTheme(settings?.themePreference || 'light');
-            }
-        };
-
-        updateEffectiveTheme();
-
-        const mediaQuery = window.matchMedia('(prefers-color-scheme: dark)');
-        mediaQuery.addEventListener('change', updateEffectiveTheme);
-        return () => mediaQuery.removeEventListener('change', updateEffectiveTheme);
-    }, [settings?.themePreference]);
+    const effectiveDark = settings?.effectiveDark ?? false;
 
     useEffect(() => {
         if (auth?.login) {
@@ -110,8 +93,7 @@ export default function Header({ choices, dayIndex }: Props) {
     }
 
     const toggleTheme = () => {
-        // Přepínáme mezi light a dark (ignorujeme system pro jednoduchost)
-        const newTheme: ThemePreference = effectiveTheme === 'dark' ? 'light' : 'dark';
+        const newTheme: ThemePreference = effectiveDark ? 'light' : 'dark';
         settings?.setThemePreference(newTheme);
     }
 
@@ -195,21 +177,16 @@ export default function Header({ choices, dayIndex }: Props) {
                 <button
                     className="theme-toggle"
                     onClick={toggleTheme}
-                    title={effectiveTheme === 'dark' ? 'Přepnout na světlý režim' : 'Přepnout na tmavý režim'}
+                    title={effectiveDark ? 'Přepnout na světlý režim' : 'Přepnout na tmavý režim'}
                     aria-label="Přepnout světlý/tmavý režim"
                 >
-                    <FontAwesomeIcon icon={effectiveTheme === 'dark' ? faSun : faMoon} />
+                    <FontAwesomeIcon icon={effectiveDark ? faSun : faMoon} />
                 </button>
-                <NavDropdown
-                    align="end"
-                    title={<FontAwesomeIcon icon={faPalette} />}
-                    id="color-theme-dropdown"
-                    className="theme-toggle"
-                >
-                    <NavDropdown.Item active={settings?.colorTheme === 'green'} onClick={() => settings?.setColorTheme('green' as ColorTheme)}>🟢 Zelený</NavDropdown.Item>
-                    <NavDropdown.Item active={settings?.colorTheme === 'blue'} onClick={() => settings?.setColorTheme('blue' as ColorTheme)}>🔵 Modrý</NavDropdown.Item>
-                    <NavDropdown.Item active={settings?.colorTheme === 'purple'} onClick={() => settings?.setColorTheme('purple' as ColorTheme)}>🟣 Fialový</NavDropdown.Item>
-                </NavDropdown>
+                <HuePicker
+                    accentHue={settings?.accentHue ?? 142}
+                    isDark={effectiveDark}
+                    onChange={hue => settings?.setAccentHue(hue)}
+                />
                 <NavDropdown align="end" title={auth?.login} id="basic-nav-dropdown">
                     <NavDropdown.Item onClick={() => setSettingsModalOpen(true)}>Nastavení</NavDropdown.Item>
                     <NavDropdown.Item onClick={() => setRefreshMenuModalOpen(true)}>Přenačtení menu</NavDropdown.Item>

client/src/components/HuePicker.scss

@@ -0,0 +1,138 @@
+.hue-picker-dropdown {
+  .dropdown-toggle {
+    background: transparent !important;
+    border: none !important;
+    color: var(--luncher-navbar-text) !important;
+    padding: 8px 12px;
+    font-size: 1.1rem;
+    display: flex;
+    align-items: center;
+    cursor: pointer;
+    border-radius: var(--luncher-radius-sm);
+    transition: var(--luncher-transition);
+
+    &::after {
+      display: none;
+    }
+
+    &:hover {
+      background: rgba(255, 255, 255, 0.1) !important;
+      transform: scale(1.1);
+    }
+
+    &:focus {
+      outline: none;
+      box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.3) !important;
+    }
+  }
+}
+
+.hue-picker-panel {
+  padding: 0 !important;
+  min-width: 240px;
+
+  .hue-picker-inner {
+    padding: 14px 16px;
+  }
+
+  .hue-picker-label {
+    font-size: 0.75rem;
+    font-weight: 600;
+    text-transform: uppercase;
+    letter-spacing: 0.5px;
+    color: var(--luncher-text-secondary);
+    margin-bottom: 12px;
+  }
+}
+
+.hue-slider {
+  -webkit-appearance: none;
+  appearance: none;
+  width: 100%;
+  height: 12px;
+  border-radius: 6px;
+  background: linear-gradient(
+    to right,
+    hsl(0 70% 50%), hsl(30 70% 50%), hsl(60 70% 50%), hsl(90 70% 50%),
+    hsl(120 70% 50%), hsl(150 70% 50%), hsl(180 70% 50%), hsl(210 70% 50%),
+    hsl(240 70% 50%), hsl(270 70% 50%), hsl(300 70% 50%), hsl(330 70% 50%), hsl(360 70% 50%)
+  );
+  outline: none;
+  cursor: pointer;
+  margin-bottom: 14px;
+
+  &::-webkit-slider-thumb {
+    -webkit-appearance: none;
+    appearance: none;
+    width: 20px;
+    height: 20px;
+    border-radius: 50%;
+    background: white;
+    border: 2px solid rgba(0, 0, 0, 0.25);
+    cursor: pointer;
+    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
+    transition: transform 0.15s ease;
+
+    &:hover {
+      transform: scale(1.15);
+    }
+  }
+
+  &::-moz-range-thumb {
+    width: 20px;
+    height: 20px;
+    border-radius: 50%;
+    background: white;
+    border: 2px solid rgba(0, 0, 0, 0.25);
+    cursor: pointer;
+    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
+  }
+}
+
+.hue-presets {
+  display: flex;
+  gap: 8px;
+  margin-bottom: 14px;
+
+  .hue-swatch {
+    width: 26px;
+    height: 26px;
+    border-radius: 50%;
+    border: 2px solid transparent;
+    cursor: pointer;
+    padding: 0;
+    transition: transform 0.15s ease, border-color 0.15s ease;
+    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
+
+    &:hover {
+      transform: scale(1.15);
+    }
+
+    &.active {
+      border-color: var(--luncher-text);
+      transform: scale(1.1);
+    }
+  }
+}
+
+.hue-preview {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  padding-top: 4px;
+  border-top: 1px solid var(--luncher-border);
+
+  .hue-preview-chip {
+    width: 32px;
+    height: 32px;
+    border-radius: var(--luncher-radius-sm);
+    flex-shrink: 0;
+    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
+    transition: background 0.2s ease;
+  }
+
+  span {
+    font-size: 0.8rem;
+    color: var(--luncher-text-secondary);
+  }
+}

client/src/components/HuePicker.tsx

@@ -0,0 +1,71 @@
+import { Dropdown } from 'react-bootstrap';
+import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
+import { faPalette } from '@fortawesome/free-solid-svg-icons';
+import './HuePicker.scss';
+
+const PRESETS = [
+  { hue: 142, label: 'Zelená' },
+  { hue: 217, label: 'Modrá' },
+  { hue: 263, label: 'Fialová' },
+  { hue: 0, label: 'Červená' },
+  { hue: 28, label: 'Oranžová' },
+  { hue: 340, label: 'Růžová' },
+];
+
+type Props = {
+  accentHue: number;
+  isDark: boolean;
+  onChange: (hue: number) => void;
+};
+
+function swatchColor(hue: number, isDark: boolean): string {
+  return `hsl(${hue} 70% ${isDark ? 55 : 38}%)`;
+}
+
+export default function HuePicker({ accentHue, isDark, onChange }: Props) {
+  return (
+    <Dropdown align="end" autoClose="outside" className="hue-picker-dropdown">
+      <Dropdown.Toggle
+        as="button"
+        className="theme-toggle"
+        aria-label="Barva zvýraznění"
+        title="Barva zvýraznění"
+      >
+        <FontAwesomeIcon icon={faPalette} />
+      </Dropdown.Toggle>
+      <Dropdown.Menu className="hue-picker-panel">
+        <div className="hue-picker-inner">
+          <div className="hue-picker-label">Barva zvýraznění</div>
+          <input
+            type="range"
+            min={0}
+            max={360}
+            value={accentHue}
+            onChange={e => onChange(parseInt(e.target.value, 10))}
+            className="hue-slider"
+            aria-label="Odstín barvy zvýraznění"
+          />
+          <div className="hue-presets">
+            {PRESETS.map(p => (
+              <button
+                key={p.hue}
+                className={`hue-swatch${accentHue === p.hue ? ' active' : ''}`}
+                style={{ background: swatchColor(p.hue, isDark) }}
+                title={p.label}
+                onClick={() => onChange(p.hue)}
+                aria-label={p.label}
+              />
+            ))}
+          </div>
+          <div className="hue-preview">
+            <div
+              className="hue-preview-chip"
+              style={{ background: swatchColor(accentHue, isDark) }}
+            />
+            <span>Aktuální barva zvýraznění</span>
+          </div>
+        </div>
+      </Dropdown.Menu>
+    </Dropdown>
+  );
+}