fix: Correct hooks format - add nested hooks array

SessionEnd hooks require { hooks: [...] } format, not direct type/command.
Fixed install-hooks.sh script and setup.md command.
Bump version to 2.1.3

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

plugins/learn/scripts/install-hooks.sh

@@ -37,10 +37,12 @@ d = json.load(open('$SETTINGS_FILE'))
 hooks = d.get('hooks', {})
 session_end = hooks.get('SessionEnd', [])
 for h in session_end:
-    cmd = h.get('command', '')
-    if 'learn:analyze' in cmd:
-        print('yes')
-        exit(0)
+    inner_hooks = h.get('hooks', [])
+    for ih in inner_hooks:
+        cmd = ih.get('command', '')
+        if 'learn:analyze' in cmd:
+            print('yes')
+            exit(0)
 print('no')
 " 2>/dev/null)
 
@@ -60,11 +62,15 @@ settings_file = os.path.expanduser("~/.claude/settings.json")
 with open(settings_file, 'r') as f:
     settings = json.load(f)
 
-# Define Learn hooks
+# Define Learn hooks (format: hooks array inside)
 learn_session_end = {
-    "type": "command",
-    "command": "echo '\n━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\n💡 Tip: Rulează /learn:analyze pentru a captura lecțiile din sesiune\n━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━'",
-    "timeout": 5
+    "hooks": [
+        {
+            "type": "command",
+            "command": "echo '\\n━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\\n💡 Tip: Rulează /learn:analyze pentru a captura lecțiile din sesiune\\n━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━'",
+            "timeout": 5
+        }
+    ]
 }
 
 learn_pre_compact = {