chore: Migrate to Vite+ toolchain, fix all lint errors, and remove async from synchronous code

[fadi-george]

Description

1 Line Summary

Migrate from Vite to Vite+ toolchain, resolve all lint/type errors, and remove unnecessary async from synchronous functions.

Details

• Toolchain migration: Migrated from Vite to Vite+ (vp) toolchain for building, testing, and linting. Consolidated test config into the main Vite config and replaced vite-tsconfig-paths with builtin support.
• Explicit test imports: Removed globals: true from vitest config and added explicit import { vi, describe, test, expect, ... } from 'vite-plus/test' across all 64 test files, fixing type resolution issues with vp check.
• Lint fixes (256 issues across ~50 files):
  • no-floating-promises: added void for fire-and-forget calls
  • no-base-to-string / restrict-template-expressions: used JSON.stringify(), String(), .toISOString() for proper serialization
  • await-thenable: removed unnecessary await on non-Promise values
  • unbound-method: used .bind(), extracted spy variables, restructured method access
  • no-redundant-type-constituents: simplified types
  • no-misused-spread: replaced class instance spread with Object.assign()
• require-await fixes: Removed async from functions that never await, or converted them to return Promise.resolve()/Promise.reject() where callers depend on the Promise return type. Affected source files include PermissionManager, SessionManager, ServiceWorkerManager, SlidedownManager, WorkerMessengerPage, ServiceWorker, init.ts, listeners.ts, and pageSdkInit.ts.
• OneSignalDeferredLoadedCallback type update: Updated callback type from () => void to () => void | PromiseLike<void> so that await OneSignal.push(item) works without wrapping in Promise.resolve().
• api.json: Updated setConsentRequired spec to isAsync: false / returnType: "void" to match the actual implementation.
• Removed obsolete files: Deleted GitHub automation scripts (Asana integrations, release drafter) that are no longer in use.

Systems Affected

• WebSDK
• Backend
• Dashboard

Validation

Tests

Info

All 484 tests pass across 57 test files. vp check reports 0 errors and 0 warnings across 287 source files.

Checklist

• All the automated tests pass or I explained why that is not possible
• I have personally tested this on my machine or explained why that is not possible
• I have included test coverage for these changes or explained why they are not needed

Programming Checklist
Interfaces:

• Don't use default export
• New interfaces are in model files

Functions:

• Don't use default export
• All function signatures have return types
• Helpers should not access any data but rather be given the data to operate on.

Typescript:

• No Typescript warnings
• Avoid silencing null/undefined warnings with the exclamation point

Other:

• Iteration: refrain from using elem of array syntax. Prefer forEach or use map
• Avoid using global OneSignal accessor for context if possible. Instead, we can pass it to function/constructor so that we don't call OneSignal.context

Screenshots

Info

No UI changes — this is a toolchain migration and lint cleanup.

Checklist

• I have included screenshots/recordings of the intended results or explained why they are not needed

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