fix(settings): harden locations and site login matching

src/components/SettingsView.tsx

@@ -22,7 +22,9 @@ import appIcon from '../assets/app-icon.png';
 import {
   DEFAULT_CATEGORY_SUBFOLDERS,
   DOWNLOAD_CATEGORIES,
-  normalizeCategorySubfolder
+  formatDerivedCategoryPath,
+  normalizeCategorySubfolder,
+  subfolderFromDerivedCategoryPath
 } from '../utils/downloadLocations';
 import { usePlatformInfo } from '../utils/platform';
 
@@ -146,10 +148,10 @@ const CategoryFolderInput = ({
   settings: SettingsState;
   onBrowse: () => void;
 }) => {
-  const base = settings.baseDownloadFolder.replace(/\/+$/, '') || '~/Downloads';
+  const base = settings.baseDownloadFolder || '~/Downloads';
   const sub = settings.categorySubfolders[category] || DEFAULT_CATEGORY_SUBFOLDERS[category as keyof typeof DEFAULT_CATEGORY_SUBFOLDERS];
   const override = settings.categoryDirectoryOverrides[category];
-  const displayPath = override ?? `${base}/${sub}`;
+  const displayPath = override ?? formatDerivedCategoryPath(base, sub);
 
   const [localValue, setLocalValue] = useState<string | null>(null);
 
@@ -164,17 +166,17 @@ const CategoryFolderInput = ({
         onChange={(e) => setLocalValue(e.target.value)}
         onBlur={() => {
           const val = localValue ?? displayPath;
-          const basePrefix = base + '/';
+          const derivedSubfolder = subfolderFromDerivedCategoryPath(val, base);
 
           if (!val.trim()) {
             settings.setCategoryDirectoryOverride(category, undefined);
             settings.setCategorySubfolder(category, '');
-          } else if (val.startsWith(basePrefix)) {
+          } else if (derivedSubfolder !== null) {
             settings.setCategoryDirectoryOverride(category, undefined);
             settings.setCategorySubfolder(
               category,
               normalizeCategorySubfolder(
-                val.substring(basePrefix.length),
+                derivedSubfolder,
                 DEFAULT_CATEGORY_SUBFOLDERS[category as keyof typeof DEFAULT_CATEGORY_SUBFOLDERS]
               )
             );
@@ -867,6 +869,9 @@ runEngineChecks(false);
                       type="text"
                       value={settings.baseDownloadFolder}
                       onChange={(e) => settings.setBaseDownloadFolder(e.target.value)}
+                      onBlur={() => {
+                        settings.setBaseDownloadFolder(settings.baseDownloadFolder.trim() || '~/Downloads');
+                      }}
                       className="app-control w-64 text-[11px] px-2"
                       placeholder="~/Downloads"
                     />

src/store/useDownloadStore.test.ts

@@ -1,5 +1,5 @@
 import { describe, it, expect, vi, beforeEach } from 'vitest';
-import { getProxyArgs, normalizeCustomProxy, useDownloadStore } from './useDownloadStore';
+import { getProxyArgs, getSiteLogin, normalizeCustomProxy, useDownloadStore } from './useDownloadStore';
 import { useSettingsStore } from './useSettingsStore';
 import * as ipc from '../ipc';
 
@@ -90,6 +90,25 @@ describe('useDownloadStore', () => {
     } as ReturnType<typeof useSettingsStore.getState>)).toBe('socks5://127.0.0.1:1080');
   });
 
+  it('matches site logins by host, wildcard host, path, and full URL patterns', () => {
+    const settings = {
+      siteLogins: [
+        { id: 'host', urlPattern: 'example.com', username: 'host' },
+        { id: 'wildcard', urlPattern: '*.cdn.example.com', username: 'wildcard' },
+        { id: 'broad', urlPattern: '*.example.com', username: 'broad' },
+        { id: 'path', urlPattern: 'secure.example.com/private/*', username: 'path' },
+        { id: 'url', urlPattern: 'https://downloads.example.net/releases/*', username: 'url' }
+      ]
+    } as ReturnType<typeof useSettingsStore.getState>;
+
+    expect(getSiteLogin('https://example.com/file.zip', settings)?.id).toBe('host');
+    expect(getSiteLogin('https://assets.cdn.example.com/file.zip', settings)?.id).toBe('wildcard');
+    expect(getSiteLogin('https://secure.example.com/private/file.zip', settings)?.id).toBe('path');
+    expect(getSiteLogin('https://downloads.example.net/releases/app.zip', settings)?.id).toBe('url');
+    expect(getSiteLogin('https://secure.example.com/public/file.zip', settings)?.id).toBe('broad');
+    expect(getSiteLogin('https://unrelated.example.org/public/file.zip', settings)).toBeNull();
+  });
+
   it('Start Queue dispatches exactly once for mixed dispatched/undispatched items', async () => {
     useDownloadStore.setState({
       downloads: [

src/store/useDownloadStore.ts

@@ -124,24 +124,64 @@ export const getProxyArgs = async (settings: ReturnType<typeof useSettingsStore.
   return null;
 };
 
+const escapeRegex = (value: string): string =>
+  value.replace(/[.+?^${}()|[\]\\]/g, '\\$&');
+
+const wildcardToRegex = (pattern: string): RegExp =>
+  new RegExp(`^${escapeRegex(pattern).replace(/\*+/g, '.*')}$`);
+
+const patternSpecificity = (pattern: string): number =>
+  pattern.replace(/\*/g, '').length;
+
+const hostPatternScore = (pattern: string, host: string): number | null => {
+  if (pattern.startsWith('*.')) {
+    const suffix = pattern.substring(2);
+    return host === suffix || host.endsWith(`.${suffix}`)
+      ? 1000 + patternSpecificity(pattern)
+      : null;
+  }
+
+  if (pattern.includes('*')) {
+    return wildcardToRegex(pattern).test(host)
+      ? 1000 + patternSpecificity(pattern)
+      : null;
+  }
+
+  return host === pattern ? 2000 + patternSpecificity(pattern) : null;
+};
+
+const urlPatternScore = (pattern: string, url: URL): number | null => {
+  if (/^[a-z][a-z0-9+.-]*:\/\//i.test(pattern)) {
+    const normalizedPattern = pattern.toLowerCase().replace(/\/+$/, '');
+    const normalizedUrl = url.toString().toLowerCase().replace(/\/+$/, '');
+    return wildcardToRegex(normalizedPattern).test(normalizedUrl)
+      ? 4000 + patternSpecificity(normalizedPattern)
+      : null;
+  }
+
+  if (pattern.includes('/')) {
+    const normalizedPattern = pattern.toLowerCase().replace(/^\/+/, '');
+    const normalizedTarget = `${url.hostname}${url.pathname}`.toLowerCase().replace(/\/+$/, '');
+    return wildcardToRegex(normalizedPattern).test(normalizedTarget)
+      ? 3000 + patternSpecificity(normalizedPattern)
+      : null;
+  }
+
+  return hostPatternScore(pattern, url.hostname.toLowerCase());
+};
+
 export const getSiteLogin = (url: string, settings: ReturnType<typeof useSettingsStore.getState>) => {
   try {
     const urlObj = new URL(url);
-    const host = urlObj.hostname.toLowerCase();
+    let bestMatch: { login: typeof settings.siteLogins[number]; score: number } | null = null;
     for (const login of settings.siteLogins) {
-      let pattern = login.urlPattern.toLowerCase().trim();
-      if (pattern.startsWith('*.')) {
-        const suffix = pattern.substring(2);
-        if (host === suffix || host.endsWith('.' + suffix)) return login;
-      } else if (pattern.includes('*')) {
-        const collapsed = pattern.replace(/\*+/g, '*');
-        const escaped = collapsed.replace(/[.+?^${}()|[\]\\]/g, '\\$&');
-        const regex = new RegExp('^' + escaped.replace(/\*/g, '.*') + '$');
-        if (regex.test(host)) return login;
-      } else if (host === pattern) {
-        return login;
+      const pattern = login.urlPattern.toLowerCase().trim();
+      const score = pattern ? urlPatternScore(pattern, urlObj) : null;
+      if (score !== null && (!bestMatch || score > bestMatch.score)) {
+        bestMatch = { login, score };
       }
     }
+    return bestMatch?.login ?? null;
   } catch (e) {}
   return null;
 };

src/utils/downloadLocations.test.ts

@@ -11,9 +11,11 @@ vi.mock('@tauri-apps/api/path', () => ({
 import {
   downloadLocationEquals,
   DEFAULT_CATEGORY_SUBFOLDERS,
+  formatDerivedCategoryPath,
   normalizeCategorySubfolder,
   normalizeDownloadLocationSettings,
-  resolveCategoryDestination
+  resolveCategoryDestination,
+  subfolderFromDerivedCategoryPath
 } from './downloadLocations';
 
 describe('download locations', () => {
@@ -68,4 +70,21 @@ describe('download locations', () => {
     expect(normalizeCategorySubfolder('C:\\Media\\Movies', 'Movies')).toBe('Media/Movies');
     expect(normalizeCategorySubfolder('../../', 'Movies')).toBe('Movies');
   });
+
+  it('formats and parses derived category paths with platform path separators', () => {
+    expect(formatDerivedCategoryPath('/Users/test/Downloads', 'Video Files'))
+      .toBe('/Users/test/Downloads/Video Files');
+    expect(formatDerivedCategoryPath('D:\\Downloads', 'Video Files'))
+      .toBe('D:\\Downloads\\Video Files');
+    expect(subfolderFromDerivedCategoryPath(
+      'D:\\Downloads\\Video Files',
+      'd:\\downloads'
+    )).toBe('Video Files');
+    expect(subfolderFromDerivedCategoryPath(
+      '/Users/test/Downloads/Video Files',
+      '/Users/test/Downloads'
+    )).toBe('Video Files');
+    expect(subfolderFromDerivedCategoryPath('/Volumes/Media', '/Users/test/Downloads'))
+      .toBeNull();
+  });
 });

src/utils/downloadLocations.ts

@@ -61,6 +61,31 @@ const normalizedForComparison = (value: string): string =>
 const legacyDerivedPath = (base: string, subfolder: string): string =>
   `${normalizedForComparison(base)}/${subfolder.replace(/^[\\/]+|[\\/]+$/g, '')}`;
 
+const isWindowsLikePath = (value: string): boolean =>
+  /^[a-z]:[\\/]/i.test(value) || value.startsWith('\\\\') || value.includes('\\');
+
+export const formatDerivedCategoryPath = (base: string, subfolder: string): string => {
+  const trimmedBase = base.trim() || '~/Downloads';
+  const relative = subfolder.replace(/^[\\/]+|[\\/]+$/g, '');
+  const separator = isWindowsLikePath(trimmedBase) ? '\\' : '/';
+  return `${trimmedBase.replace(/[\\/]+$/, '')}${separator}${relative}`;
+};
+
+export const subfolderFromDerivedCategoryPath = (
+  value: string,
+  base: string
+): string | null => {
+  const normalizedValue = normalizedForComparison(value.trim());
+  const normalizedBase = normalizedForComparison((base.trim() || '~/Downloads'));
+  const isWindows = isWindowsLikePath(base);
+  const comparableValue = isWindows ? normalizedValue.toLocaleLowerCase() : normalizedValue;
+  const comparableBase = isWindows ? normalizedBase.toLocaleLowerCase() : normalizedBase;
+
+  if (comparableValue === comparableBase) return '';
+  if (!comparableValue.startsWith(`${comparableBase}/`)) return null;
+  return normalizedValue.slice(normalizedBase.length + 1);
+};
+
 export const normalizeCategorySubfolder = (
   value: string,
   fallback: string