fix(app): run changelog parser before tsc

[comppaz]

Summary

• Fix CI build failure by running parse-changelog.js before TypeScript compilation
• The build script was tsc && vite build, but changelog.json is generated in vite.config.ts which only executes when Vite starts
• Now generates the changelog data file before tsc runs

Test plan

• PR checks pass (build succeeds)
• After merge, v0.7.2 release builds successfully