refactor: migrate main.py to modular routers and add project roadmap

- Migrated monolithic main.py to feature-scoped routers in app/routers/
- Added GEMINI.md for project context and AI instructional guidelines
- Updated README.md with a comprehensive modernization plan (SQL migration, robust scraping DSL, frontend modernization)
- Improved authentication with cookie support and modular JS
- Updated test suite and documentation

static/js/anime-details.js

@@ -62,16 +62,13 @@ async function searchAnimeDetails(query, malId = null) {
             const providersData = await getProvidersInfo();
 
             // Build results HTML
-            const streamingParts = [
-                `<div class="streaming-results-header">
-                    <h3>🎬 Résultats de streaming</h3>
-                </div>
-                <div class="search-results" style="margin-top: 20px;">`
-            ];
+            const streamingParts = [];
+            let hasResults = false;
 
             // Display results from each provider - render all cards in parallel
             for (const [providerId, results] of Object.entries(streamingData.value.results)) {
                 if (results && results.length > 0) {
+                    hasResults = true;
                     const provider = providersData.anime_providers[providerId];
 
                     // Render all cards for this provider
@@ -81,8 +78,17 @@ async function searchAnimeDetails(query, malId = null) {
                 }
             }
 
-            streamingParts.push('</div>');
-            streamingHtml = streamingParts.join('');
+            // Only add header and wrapper if we have results
+            if (hasResults) {
+                streamingParts.unshift(
+                    `<div class="streaming-results-header">
+                        <h3>🎬 Résultats de streaming</h3>
+                    </div>
+                    <div class="search-results" style="margin-top: 20px;">`
+                );
+                streamingParts.push('</div>');
+                streamingHtml = streamingParts.join('');
+            }
         }
 
         // Display results
@@ -150,16 +156,13 @@ async function getProviderSearchResults(query) {
         }
 
         // Build results HTML
-        const htmlParts = [
-            `<div class="streaming-results-header">
-                <h3>🎬 Résultats de streaming</h3>
-            </div>
-            <div class="search-results" style="margin-top: 20px;">`
-        ];
+        const htmlParts = [];
+        let hasResults = false;
 
         // Display results from each provider
         for (const [providerId, results] of Object.entries(data.results)) {
             if (results && results.length > 0) {
+                hasResults = true;
                 const providersData = await getProvidersInfo();
                 const provider = providersData.anime_providers[providerId];
 
@@ -170,7 +173,16 @@ async function getProviderSearchResults(query) {
             }
         }
 
-        htmlParts.push('</div>');
+        // Only add header and wrapper if we have results
+        if (hasResults) {
+            htmlParts.unshift(
+                `<div class="streaming-results-header">
+                    <h3>🎬 Résultats de streaming</h3>
+                </div>
+                <div class="search-results" style="margin-top: 20px;">`
+            );
+            htmlParts.push('</div>');
+        }
 
         return htmlParts.join('');