chore: update Node.js version to 20.19.0 across project files

- Updated the Node.js version in .node-version and package.json to 20.19.0.
- Revised README.md and docs/dev.md to reflect the new minimum Node.js requirement.
- Adjusted setup-node action to use the version specified in .node-version for consistency.

.github/actions/setup-node/action.yml

@@ -3,10 +3,10 @@ description: "Install pnpm and setup Node.js with pnpm cache (fixed versions)"
 runs:
   using: "composite"
   steps:
-    - name: Setup Node.js 20.12.0
+    - name: Setup Node.js
       uses: actions/setup-node@8f152de45cc393bb48ce5d89d36b731f54556e65 # v4.0.0
       with:
-        node-version: 20.12.0
+        node-version-file: '.node-version'
 
     - name: Setup pnpm
       shell: bash

.node-version

@@ -1 +1 @@
-20.12.0
+20.19.0

README.md

@@ -68,7 +68,7 @@ The application reads Claude Code conversation logs from:
 
 ### System Requirements
 
-- **Node.js**: Version 20.12.0 or later
+- **Node.js**: Version 20.18.1 or later
 - **Operating Systems**: macOS and Linux (Windows is not supported)
 
 ### Claude Code Compatibility

docs/dev.md

@@ -49,7 +49,7 @@ Claude Code Viewer provides advanced control over Claude Code session processes:
 
 ### Requirements
 
-- **Node.js**: Version 20.12.0 or later (see [.node-version](../.node-version))
+- **Node.js**: Version 20.19.0 or later (see [.node-version](../.node-version))
 - **Package Manager**: pnpm 10.8.1 or later
 
 ### Initial Setup

package.json

@@ -12,7 +12,7 @@
     "dist"
   ],
   "engines": {
-    "node": ">=20.12.0"
+    "node": ">=20.19.0"
   },
   "exports": {
     ".": "./dist/index.js",