infra: add linting and formatting for js projects (#230)

* wip

* wip

* wip

* format

* wip(mobile): lint and format

* cleanup

* nits

* nits

* idiomatic react

* nit

* format all root files

js/desktop/src/lib/particle-path.ts

@@ -16,8 +16,11 @@ export type ParticlePath = string & { readonly [__brand]: true };
  *   particlePath("net1", ["p1"])     // => "/net1/p1"
  *   particlePath("net1", ["p1","p2"])// => "/net1/p1/p2"
  */
-export function particlePath(networkId: string, segments: string[] = []): ParticlePath {
-  return `/${[networkId, ...segments].join("/")}` as ParticlePath;
+export function particlePath(
+  networkId: string,
+  segments: string[] = [],
+): ParticlePath {
+  return `/${[networkId, ...segments].join('/')}` as ParticlePath;
 }
 
 /**
@@ -27,7 +30,7 @@ export function parseParticlePath(path: ParticlePath): {
   networkId: string;
   segments: string[];
 } {
-  const parts = path.split("/").filter(Boolean);
+  const parts = path.split('/').filter(Boolean);
   return { networkId: parts[0], segments: parts.slice(1) };
 }
 
@@ -46,9 +49,9 @@ export function toFirestoreDocPath(path: ParticlePath): string {
 
   const parts: string[] = [base, segments[0]];
   for (let i = 1; i < segments.length; i++) {
-    parts.push("children", segments[i]);
+    parts.push('children', segments[i]);
   }
-  return parts.join("/");
+  return parts.join('/');
 }
 
 /**