chore: update settings.json with new hooks and commands; update .gitignore to include .serena/ directory

.claude/settings.json

@@ -25,5 +25,49 @@
       "filePattern": ".claude/skills/deploy-workflow.md",
       "description": "CI/CD pipeline, Docker patterns, deployment guide"
     }
-  ]
+  ],
+  "hooks": {
+    "PreToolUse": [
+      {
+        "matcher": "",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "serena-hooks remind --client=claude-code"
+          }
+        ]
+      },
+      {
+        "matcher": "mcp__serena__*",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "serena-hooks auto-approve --client=claude-code"
+          }
+        ]
+      }
+    ],
+    "SessionStart": [
+      {
+        "matcher": "",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "serena-hooks activate --client=claude-code"
+          }
+        ]
+      }
+    ],
+    "SessionEnd": [
+      {
+        "matcher": "",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "serena-hooks cleanup --client=claude-code"
+          }
+        ]
+      }
+    ]
+  }
 }

.github/workflows/nix-build.yml

@@ -46,7 +46,7 @@ jobs:
       - name: Cache Nix
         uses: DeterminateSystems/magic-nix-cache-action@v14
         with:
-          use-flakehub: true
+          use-flakehub: false
 
       - name: Build ${{ matrix.service }}
         id: build

.gitignore

@@ -11,6 +11,7 @@ node_modules
 .turbo/
 # IDEs and editors
 /.idea
+.serena/
 .project
 .classpath
 .c9/