ci: add webapp build job to validate frontend on PRs

[dev-jodee]

Summary

• Add a webapp-build job to .github/workflows/build.yml that compiles the webapp/ workspace on every PR.
• Closes a CI coverage gap: webapp/ was never built, typechecked, or tested. Frontend-only dependency bumps (e.g. the current lucide-react dependabot PR) went green without anything compiling the code that uses them.
• Node-only job (no Rust/Solana toolchain): generates + builds the TS client, then runs tsc -b && vite build for webapp. generate-clients reads the committed IDL, so no cargo build-sbf needed.

Test Plan

Verified the full chain locally on current main:

pnpm install --frozen-lockfile
pnpm run generate-clients
pnpm --filter @solana/subscriptions build
pnpm --filter webapp build   # tsc -b && vite build -> green

After merge, the new webapp-build check should appear and pass on open PRs (including the lucide-react bump).

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
solana-subscriptions-program	Ready	Preview, Comment	Jun 4, 2026 1:02pm

[github-actions]

Compute Unit Report

Instruction	Samples	Min CUs	Max CUs	Avg CUs	Est Cost (Low) [SOL]	Est Cost (Med) [SOL]	Est Cost (High) [SOL]
cancel_subscription	22	1720	2030	1919	0.000005000	0.000005076	0.000005959
close_subscription_authority	10	1803	1833	1806	0.000005000	0.000005072	0.000005903
create_fixed_delegation	41	3520	11022	4826	0.000005001	0.000005193	0.000007413
create_plan	97	3436	10949	4660	0.000005001	0.000005186	0.000007330
create_recurring_delegation	29	3550	17055	5418	0.000005001	0.000005216	0.000007709
delete_plan	9	359	359	359	0.000005000	0.000005014	0.000005179
init_subscription_authority	173	6226	24095	9499	0.000005002	0.000005379	0.000009749
resume_subscription	3	1723	1723	1723	0.000005000	0.000005068	0.000005861
revoke_delegation	19	255	519	353	0.000005000	0.000005014	0.000005176
subscribe	32	6485	16985	8226	0.000005002	0.000005329	0.000009113
transfer_fixed	9	5479	12103	7531	0.000005002	0.000005301	0.000008765
transfer_recurring	19	5591	10184	6750	0.000005002	0.000005270	0.000008375
transfer_subscription	10	5799	10341	6743	0.000005002	0.000005269	0.000008371
update_plan	22	424	503	477	0.000005000	0.000005019	0.000005238

Generated: 2026-06-04

[greptile-apps]

Greptile Summary

This PR adds a webapp-build CI job to .github/workflows/build.yml that validates the React/Vite frontend on every PR. It correctly skips the Rust, Solana, and just toolchains, using only the existing pnpm/Node setup from the shared composite action.

• Generates the TypeScript client from the committed IDL, builds @solana/subscriptions, then runs tsc -b && vite build for the webapp — closing the gap where frontend-only dependency bumps would pass CI unchecked.
• The job has no paths filter, so it runs even on pure Rust PRs; a filter on webapp/**, clients/typescript/**, idl/**, and pnpm-lock.yaml would skip the unnecessary Node build for Rust-only changes.

Confidence Score: 4/5

Safe to merge — adds a CI-only job with no production code changes, correctly wired to the shared setup action.

The workflow addition is straightforward and matches the existing job's patterns. The only gap is the missing paths filter, which means the webapp build will run on Rust-only PRs where it adds no value.

.github/workflows/build.yml — worth adding a paths filter to the webapp-build job if CI minutes are a concern.

Important Files Changed

Filename	Overview
.github/workflows/build.yml	Adds a new webapp-build job that compiles the webapp without Rust/Solana toolchain; correctly delegates pnpm setup to the shared composite action, but lacks a paths filter so it runs on every PR regardless of what changed.

Sequence Diagram

sequenceDiagram
    participant GH as GitHub Actions
    participant Setup as .github/actions/setup
    participant PNPM as pnpm (Node only)
    participant Gen as generate-clients
    participant TsClient as @solana/subscriptions
    participant Webapp as webapp

    GH->>Setup: "checkout@v6 (fetch-depth: 1)"
    GH->>Setup: composite action (install-rust: false, install-solana: false, install-just: false)
    Setup->>PNPM: pnpm install --frozen-lockfile
    GH->>Gen: pnpm run generate-clients (reads committed idl/subscriptions.json)
    Gen-->>TsClient: writes clients/typescript/src/generated/
    GH->>TsClient: "pnpm --filter @solana/subscriptions build"
    TsClient-->>Webapp: "workspace:* dependency resolved"
    GH->>Webapp: "pnpm --filter webapp build (tsc -b && vite build)"

Loading

_{Reviews (1): Last reviewed commit: "ci: add webapp build job to validate fro..." | Re-trigger Greptile}