persist data source branch in localStorage

packages/viewer/src/context.ts

@@ -1,18 +1,19 @@
 export type { Context } from './context/types'
 
-import { getContext, setContext } from 'svelte'
-import { type Readable, derived } from 'svelte/store'
 import { formula as F } from '@pi-base/core'
-
-import type { Context } from './context/types'
-import { trace } from './debug'
-import * as Errors from './errors'
-import type * as Gateway from './gateway'
-import { Id } from './models'
-import { renderer } from './parser'
-import { type Local, local } from './repositories'
-import { type Prestore, type Store, create } from './stores'
-import { subscribeUntil } from './util'
+import { getContext, setContext } from 'svelte'
+import { derived, get, type Readable } from 'svelte/store'
+
+import type { Context } from '@/context/types'
+import { trace } from '@/debug'
+import * as Errors from '@/errors'
+import type * as Gateway from '@/gateway'
+import { Id } from '@/models'
+import { renderer } from '@/parser'
+import { local, type Local } from '@/repositories'
+import { create, type Prestore, type Store } from '@/stores'
+import { type Source } from '@/types'
+import { subscribeUntil } from '@/util'
 
 export type Config = {
   showDevLink: boolean
@@ -39,20 +40,29 @@ function project(store: Store) {
 export function initialize({
   db = local(),
   errorHandler = Errors.log(),
-  host,
+  source = {},
   gateway,
   showDev = false,
   typesetter = renderer,
 }: {
   db?: Local<Prestore>
   errorHandler?: Errors.Handler
-  host?: string
+  source?: Partial<Source>
   gateway: Gateway.Sync
   showDev?: boolean
   typesetter?: typeof renderer
 }): Context {
   const pre = db.load()
-  const store = create(pre, gateway, { host })
+  const store = create(
+    {
+      ...pre,
+      source: {
+        host: source.host || pre.source.host,
+        branch: source.branch || pre.source.branch,
+      },
+    },
+    gateway,
+  )
 
   db.subscribe(project(store))
 

packages/viewer/src/routes/+layout.ts

@@ -25,7 +25,9 @@ export const load: LayoutLoad = async ({ fetch, url: { host } }) => {
     showDev: dev,
     errorHandler,
     gateway: sync(fetch),
-    host: bundleHost,
+    source: {
+      host: bundleHost,
+    },
   })
 
   await context.loaded()

packages/viewer/src/stores/index.ts

@@ -43,25 +43,12 @@ export type Store = {
   deduction: Deduction.Store
 }
 
-export function create(
-  pre: Prestore,
-  gateway: Gateway.Sync,
-  {
-    host = defaultHost,
-    branch = mainBranch,
-  }: {
-    host?: string
-    branch?: string
-  } = {},
-): Store {
+export function create(pre: Prestore, gateway: Gateway.Sync): Store {
   const spaces = writable(Collection.empty<Space>())
   const properties = writable(Collection.empty<Property>())
   const theorems = writable(new Theorems())
   const traits = writable(new Traits())
-  const source = Source.create({
-    host,
-    branch,
-  })
+  const source = Source.create(pre.source)
   const sync = Sync.create(refresh, pre.sync)
 
   const deduction = Deduction.create(