fix: use readFile utility in hooks and add pattern type safety

- Replace raw fs.readFileSync with readFile() from utils in
  check-console-log.js and post-edit-console-warn.js to eliminate
  TOCTOU race conditions (file deleted between existsSync and read)
- Remove redundant existsSync in post-edit-format.js (exec already
  handles missing files via its catch block)
- Resolve path upfront in post-edit-typecheck.js before tsconfig walk
- Add type guard in getGitModifiedFiles() to skip non-string and
  empty patterns before regex compilation

scripts/hooks/post-edit-format.js

@@ -25,14 +25,14 @@ process.stdin.on('end', () => {
     const input = JSON.parse(data);
     const filePath = input.tool_input?.file_path;
 
-    if (filePath && /\.(ts|tsx|js|jsx)$/.test(filePath) && fs.existsSync(filePath)) {
+    if (filePath && /\.(ts|tsx|js|jsx)$/.test(filePath)) {
       try {
         execFileSync('npx', ['prettier', '--write', filePath], {
           stdio: ['pipe', 'pipe', 'pipe'],
           timeout: 15000
         });
       } catch {
-        // Prettier not installed or failed — non-blocking
+        // Prettier not installed, file missing, or failed — non-blocking
       }
     }
   } catch {