Run npm install before build when updating InterBrain

Ensures new dependencies are installed before rebuilding the plugin,
fixing issues where updates with new packages wouldn't work until
manually running npm install.

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

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

Author: ProjectLiminality

src/services/git-service.ts

@@ -911,6 +911,12 @@ export class GitService {
       console.log(`GitService: Using npm at: ${npmPath}`);
       console.log(`GitService: Enhanced PATH: ${enhancedEnv.PATH}`);
 
+      // Run npm install first to ensure dependencies are up to date
+      console.log(`GitService: Running npm install for ${fullPath}...`);
+      await execAsync(`${npmPath} install`, { cwd: fullPath, env: enhancedEnv });
+      console.log(`GitService: npm install completed`);
+
+      // Then run the build
       await execAsync(`${npmPath} run build`, { cwd: fullPath, env: enhancedEnv });
       console.log(`GitService: Successfully built: ${fullPath}`);
     } catch (error) {