refactor: Apply code quality improvements from PR review

This commit implements the optional improvements identified during code review:

**Backend (animesama.py):**
- Replace all print() statements with logger calls for consistency
  - Use logger.debug() for detailed debugging information
  - Use logger.info() for general operational messages
  - Use logger.warning() for non-critical issues
  - Use logger.error() for error conditions
- Add comprehensive docstring to get_seasons() method:
  - Document two-phase parallel loading strategy
  - Explain performance characteristics (200x faster)
  - Document timeout behavior and error handling
  - Include usage examples and return value format
- Import logging module and initialize logger

**Frontend (anime.js & api.js):**
- Create providerSupportsSeasons() helper function in api.js:
  - Uses provider configuration as single source of truth
  - Eliminates hardcoded 'animesama' and 'anime-sama' checks
  - Supports explicit supports_seasons flag in provider config
  - Fallback to domain detection for unknown URLs
- Update renderAnimeCard() to use async helper function
- Update loadSeasonsForAnime() to use provider configuration
- Update displaySearchResults() to handle async card rendering
- Export helper function globally for use across modules

**Tests (test_anime_sama_seasons.py):**
- Fix import paths for new animesama.py location
  - Update from app.downloaders.animesama to app.downloaders.anime_sites.animesama
- All tests passing with new structure

**Benefits:**
- Consistent logging throughout the codebase
- Better maintainability with configuration-driven behavior
- Improved documentation for complex async logic
- Easier to add new season-supporting providers in future
- No hardcoded provider checks in frontend code

All tests passing: 5/5 ✅

Generated with [Claude Code](https://claude.ai/code)
via [Happy](https://happy.engineering)

Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

static/js/anime.js

@@ -10,7 +10,7 @@ async function displaySearchResults(data, lang) {
     const providers = await getProvidersInfo();
 
     let totalResults = 0;
-    let html = '';
+    let htmlPromises = [];
 
     for (const [providerId, results] of Object.entries(data.results)) {
         if (results && results.length > 0) {
@@ -18,18 +18,22 @@ async function displaySearchResults(data, lang) {
 
             results.forEach(anime => {
                 const providerInfo = providers.anime_providers[providerId];
-                html += renderAnimeCard(anime, providerId, providerInfo, lang);
+                // Collect promises for async rendering
+                htmlPromises.push(renderAnimeCard(anime, providerId, providerInfo, lang));
             });
         }
     }
 
     if (totalResults === 0) {
-        html = '<div class="no-results">Aucun résultat trouvé</div>';
+        resultsContainer.innerHTML = '<div class="no-results">Aucun résultat trouvé</div>';
+        return;
     }
 
-    resultsContainer.innerHTML = html;
+    // Wait for all cards to be rendered
+    const htmlSegments = await Promise.all(htmlPromises);
+    resultsContainer.innerHTML = htmlSegments.join('');
 
-    // Auto-load seasons (for Anime-Sama) or episodes for each anime
+    // Auto-load seasons for providers that support them
     // Stagger the requests to avoid overwhelming the server
     let delayCounter = 0;
     for (const [providerId, results] of Object.entries(data.results)) {
@@ -37,7 +41,7 @@ async function displaySearchResults(data, lang) {
             results.forEach((anime, index) => {
                 // Stagger requests: 500ms delay between each anime
                 setTimeout(() => {
-                    // Try to load seasons first (for Anime-Sama)
+                    // Try to load seasons first (if provider supports them)
                     if (anime.url) {
                         loadSeasonsForAnime(providerId, encodeURIComponent(anime.url));
                     }
@@ -51,13 +55,13 @@ async function displaySearchResults(data, lang) {
 /**
  * Render anime card HTML
  */
-function renderAnimeCard(anime, providerId, providerInfo, lang) {
+async function renderAnimeCard(anime, providerId, providerInfo, lang) {
     const metadataHtml = renderAnimeMetadata(anime.metadata);
 
-    // Check if this is Anime-Sama (for season support)
-    const isAnimeSama = providerId === 'animesama' || anime.url?.includes('anime-sama');
+    // Check if provider supports seasons using helper function
+    const supportsSeasons = await providerSupportsSeasons(providerId, anime.url);
 
-    const seasonSelectHtml = isAnimeSama ? `
+    const seasonSelectHtml = supportsSeasons ? `
         <select id="seasons-${providerId}-${encodeURIComponent(anime.url)}" onchange="handleSeasonChange('${providerId}', '${encodeURIComponent(anime.url)}', '${lang}')" style="margin-bottom: 8px;">
             <option value="">Chargement des saisons...</option>
         </select>
@@ -73,7 +77,7 @@ function renderAnimeCard(anime, providerId, providerInfo, lang) {
             <div class="anime-card-actions">
                 ${seasonSelectHtml}
                 <select id="episodes-${providerId}-${encodeURIComponent(anime.url)}">
-                    <option value="">${isAnimeSama ? 'Sélectionner une saison d\'abord' : 'Charger les épisodes...'}</option>
+                    <option value="">${supportsSeasons ? 'Sélectionner une saison d\'abord' : 'Charger les épisodes...'}</option>
                 </select>
             </div>
             <div class="anime-card-actions" id="actions-${providerId}-${encodeURIComponent(anime.url)}" style="display:none;">
@@ -131,7 +135,7 @@ function renderAnimeMetadata(metadata) {
 }
 
 /**
- * Load seasons for Anime-Sama anime
+ * Load seasons for anime (if provider supports it)
  */
 async function loadSeasonsForAnime(providerId, encodedUrl) {
     const url = decodeURIComponent(encodedUrl);
@@ -140,8 +144,9 @@ async function loadSeasonsForAnime(providerId, encodedUrl) {
     const seasonSelectElement = document.getElementById(seasonSelectId);
     if (!seasonSelectElement) return;
 
-    // Only proceed if this is Anime-Sama
-    if (!url.includes('anime-sama')) {
+    // Check if provider supports seasons
+    const supportsSeasons = await providerSupportsSeasons(providerId, url);
+    if (!supportsSeasons) {
         seasonSelectElement.style.display = 'none';
         return;
     }