Local dev GitHub integration, project creation flow, org management, and UI polish

Easier project setup with a GitHub branch picker and live slug preview — The project creation flow now lists repository branches (via a new branches API and hook), replaces the tracked-branch text field with a branch dropdown, and shows a live public-URL preview and helper text for the slug so you can finish setup faster and with fewer mistakes.
Consistent primary CTA and UI polish across the app — A new reusable PrimaryButton (neobrutalist acid-green style, hover box-shadow shift, supports asChild) was added and applied across onboarding, the project wizard, and dashboard CTAs for a consistent, prominent action style.

Added GET /v1/github/repos/:installationId/branches to fetch repository branches for a GitHub App installation.backend
Added GithubClient.listBranches and GithubBranch type to list and type branches from GitHub.integrations
Added useGithubBranches TanStack Query hook wired to the new branches API for client-side branch lists.frontend
Added PrimaryButton component (acid-green, hover shadow, supports asChild) for primary CTAs.frontend
Replaced tracked-branch text input with a Select dropdown populated from the GitHub branches API (with loading and empty states).frontend
Added live URL preview and format helper text for the project slug field so users can see their public URL while typing.frontend
Auto-selected the repository in the Select Repo step when only one repo is accessible to the installation to reduce clicks.frontend

Applied the new PrimaryButton across onboarding, project creation, and dashboard CTAs for consistent styling.frontend
Added per-option descriptions to the visibility RadioGroup (Public, Unlisted, Private) to clarify sharing behaviour.frontend
Added a tsc --watch "dev" script to internal packages so Turborepo hot-reloads local package changes during pnpm dev.devops
Renamed a Supabase migration file to a clearer name (vault_helpers.sql).database

Updated POST /v1/projects to accept clerkOwnerId (Clerk user/org ID) and resolve the internal UUID server-side before inserting the project.backend
Changed GET /v1/github/callback to redirect to /app/projects/new?installation_id=<uuid> and to accept x-clerk-user-id to populate installed_by on installations.backend
Fixed GET /api/github/installations to resolve Clerk userId to an internal UUID before querying installations and return an empty array when the user is not present.backend

Fixed environment loading to use override: true for .env.local so local secrets override placeholder values.devops
Fixed Clerk webhook handleOrgCreated to immediately upsert an admin membership for the org creator to avoid race conditions.auth
Fixed Clerk webhook handleOrgDeleted to hard-delete the organization row (and cascade membership deletes) instead of a no-op.auth
Fixed ConnectGitHubStep to pass the internal installation UUID (id) instead of the GitHub integer installation_id so downstream requests resolve correctly.frontend
Fixed useGithubRepos to map camelCase API response fields to the snake_case shape expected by the UI so the repo dropdown loads correctly.frontend
Fixed the GitHub callback page to move redirect() outside the try/catch so Next.js redirect behaviour is not swallowed as an error.frontend
Fixed SidebarWorkspaceNav active-link detection to use strict pathname equality to avoid incorrect highlights.frontend
Made OrganizationRepository.addMember idempotent by upserting on (org_id, user_id) to tolerate duplicate membership events.database
Removed invalid JavaScript null-coalescing (??) from Inngest function CEL expressions so functions register correctly in the local dev server.backend
Removed DEMO_CLERK_USER_ID from env files and corrected Supabase JWT key formats in .env.development for local dev consistency.devops