feat: Add ecosystem network to landing page capabilities

Add "Ecosystem Network" card to the capabilities grid on the
landing page with i18n keys (EN + FR).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: eprifti

frontend/src/i18n/locales/en.json

@@ -67,7 +67,9 @@
     "startAnalyzing": "Start analyzing your data in minutes",
     "startNow": "Start Now",
     "openSource": "Open Source",
-    "openSourceDesc": "GPL-3.0 licensed. Inspect, extend, and contribute to the codebase."
+    "openSourceDesc": "GPL-3.0 licensed. Inspect, extend, and contribute to the codebase.",
+    "ecosystemNetwork": "Ecosystem Network",
+    "ecosystemNetworkDesc": "Visualize species co-abundance networks with taxonomic coloring, Louvain community detection, and FBM overlay to bridge ecology with predictive models."
   },
   "login": {
     "title": "PredomicsApp",

frontend/src/i18n/locales/fr.json

@@ -67,7 +67,9 @@
     "startAnalyzing": "Commencez à analyser vos données en quelques minutes",
     "startNow": "Commencer maintenant",
     "openSource": "Open Source",
-    "openSourceDesc": "Licence GPL-3.0. Inspectez, étendez et contribuez au code source."
+    "openSourceDesc": "Licence GPL-3.0. Inspectez, étendez et contribuez au code source.",
+    "ecosystemNetwork": "Réseau écosystémique",
+    "ecosystemNetworkDesc": "Visualisez les réseaux de co-abondance avec coloration taxonomique, détection de communautés Louvain et superposition FBM reliant écologie et modèles prédictifs."
   },
   "login": {
     "title": "PredomicsApp",

frontend/src/views/HomeView.vue

@@ -211,6 +211,7 @@ const capabilities = computed(() => [
   { icon: '\u{25A3}', title: t('home.dashboardOverview'), desc: t('home.dashboardOverviewDesc') },
   { icon: '\u{2235}', title: t('home.projectNotes'), desc: t('home.projectNotesDesc') },
   { icon: '\u{21C4}', title: t('home.publicSharing'), desc: t('home.publicSharingDesc') },
+  { icon: '\u{25CE}', title: t('home.ecosystemNetwork'), desc: t('home.ecosystemNetworkDesc') },
 ])
 
 const useCases = [