Don't depend on Node anymore (#346)

## Summary
- package `packages/server` as a standalone desktop executable so
Electron and Tauri no longer depend on a system-installed Node runtime
in production
- align Electron and Tauri startup logic around launching the packaged
server, resolving binaries from the user shell, and bundling the same
server resources into both desktop apps
- replace the workspace instance proxy path that used
`@fastify/reply-from` with a direct streaming proxy so packaged
standalone builds can talk to spawned `opencode` instances correctly

## Why
Desktop production builds were still depending on a user-provided Node
runtime to launch `packages/server`, which made packaging less
self-contained and created different behavior across machines. While
moving to a standalone server executable, we also found that
Bun-compiled standalone builds could start `opencode` successfully but
failed when proxying requests to those instances through `reply-from`.

The goal of this change is to make desktop production startup
self-contained, keep Electron and Tauri behavior aligned, and restore
correct communication with local `opencode` instances in packaged
builds.

## What Changed
- added a standalone build path for `packages/server` and bundle
`codenomad-server` into desktop resources
- updated Electron production startup to resolve and launch the
standalone server executable
- updated Tauri production startup to resolve and launch the standalone
server executable with matching cwd and shell behavior
- added runtime path helpers so the packaged server can reliably find
its bundled UI, auth templates, config template, and package metadata
- improved bare binary resolution so commands like `opencode` can be
resolved from the user's login shell environment
- upgraded the server stack to newer Fastify-compatible packages needed
for the standalone/runtime work
- replaced the workspace instance proxy implementation with a direct
streaming proxy for requests to spawned `opencode` instances
- updated Electron and Tauri build/prebuild scripts to generate and
package the standalone server, while also repairing missing
platform-specific optional binaries during packaging

## Benefits
- desktop production builds no longer require Node to be installed on
the user's system
- Electron and Tauri now use the same packaged server model in
production, reducing platform drift
- packaged desktop apps can successfully create workspaces, launch
`opencode`, and proxy health/session traffic to those instances
- the server bundle is more self-contained and resilient to different
launch environments
- desktop packaging is more predictable because the required server
executable is built and bundled as part of the app build flow

packages/electron-app/electron/main/main.ts

@@ -118,6 +118,8 @@ function loadLoadingScreen(window: BrowserWindow) {
   loader.catch((error) => {
     console.error("[cli] failed to load loading screen:", error)
   })
+
+  return loader
 }
 
 function getAllowedRendererOrigins(window?: BrowserWindow | null): string[] {
@@ -292,7 +294,7 @@ function createWindow() {
   showingLoadingScreen = true
   currentCliUrl = null
   clearWindowAllowedOrigin(window)
-  loadLoadingScreen(window)
+  const loadingReady = loadLoadingScreen(window)
 
   if (process.env.NODE_ENV === "development") {
     window.webContents.openDevTools({ mode: "detach" })
@@ -311,11 +313,7 @@ function createWindow() {
     showingLoadingScreen = false
   })
 
-  if (pendingCliUrl) {
-    const url = pendingCliUrl
-    pendingCliUrl = null
-    startCliPreload(url)
-  }
+  return loadingReady
 }
 
 function showLoadingScreen(force = false) {
@@ -622,7 +620,8 @@ app.whenReady().then(() => {
     // ignore
   }
 
-  startCli()
+  const loadingReady = createWindow()
+  ;(mainWindow as BrowserWindow & { __codenomadOpenRemoteWindow?: typeof openRemoteWindow }).__codenomadOpenRemoteWindow = openRemoteWindow
 
   if (isMac) {
     session.defaultSession.setSpellCheckerEnabled(false)
@@ -639,8 +638,11 @@ app.whenReady().then(() => {
     }
   }
 
-  createWindow()
-  ;(mainWindow as BrowserWindow & { __codenomadOpenRemoteWindow?: typeof openRemoteWindow }).__codenomadOpenRemoteWindow = openRemoteWindow
+  void loadingReady.finally(() => {
+    setTimeout(() => {
+      void startCli()
+    }, 0)
+  })
 
   app.on("certificate-error", (event, _webContents, url, error, _certificate, callback) => {
     if (isInsecureOriginAllowed(url)) {

packages/electron-app/electron/main/process-manager.ts

@@ -38,7 +38,7 @@ interface StartOptions {
 
 interface CliEntryResolution {
   entry: string
-  runner: "node" | "tsx"
+  runner: "node" | "tsx" | "standalone"
   runnerPath?: string
 }
 
@@ -148,15 +148,15 @@ export class CliProcessManager extends EventEmitter {
     const listeningMode = this.resolveListeningMode()
     const host = resolveHostForMode(listeningMode)
     const args = this.buildCliArgs(options, host)
+    const cliEntry = this.resolveCliEntry(options)
 
     let child: ManagedChild
 
-    if (this.shouldUsePackagedShellSupervisor(options)) {
-      const runtimePath = this.resolveShellNodeCommand()
-      const entryPath = this.resolveBundledProdEntry()
+    if (this.shouldUsePackagedShellSupervisor(options, cliEntry)) {
       const supervisorPath = this.resolveCliSupervisorPath()
       const shellEnv = supportsUserShell() ? getUserShellEnv() : { ...process.env }
-      const shellCommand = buildUserShellCommand(`exec ${this.buildExecutableCommand(runtimePath, [entryPath, ...args])}`)
+      const shellTarget = cliEntry.runner === "standalone" ? this.buildExecutableCommand(cliEntry.entry, args) : this.buildCommand(cliEntry, args)
+      const shellCommand = buildUserShellCommand(`exec ${shellTarget}`)
       const supervisorPayload = JSON.stringify({
         command: shellCommand.command,
         args: shellCommand.args,
@@ -164,28 +164,33 @@ export class CliProcessManager extends EventEmitter {
       })
 
       console.info(
-        `[cli] launching CodeNomad CLI (${options.dev ? "dev" : "prod"}) via utility supervisor using node at ${runtimePath} (host=${host})`,
+        `[cli] launching CodeNomad CLI (${options.dev ? "dev" : "prod"}) via utility supervisor using ${cliEntry.runner} at ${cliEntry.entry} (host=${host})`,
       )
       console.info(`[cli] utility supervisor: ${supervisorPath}`)
       console.info(`[cli] shell command: ${shellCommand.command} ${shellCommand.args.join(" ")}`)
 
       child = utilityProcess.fork(supervisorPath, [supervisorPayload], {
-        env: shellEnv,
+        env: cliEntry.runner === "standalone" ? shellEnv : { ...shellEnv, ELECTRON_RUN_AS_NODE: "1" },
         stdio: "pipe",
         serviceName: "CodeNomad CLI Supervisor",
       })
       this.childLaunchMode = "utility"
     } else {
-      const cliEntry = this.resolveCliEntry(options)
       console.info(
         `[cli] launching CodeNomad CLI (${options.dev ? "dev" : "prod"}) using ${cliEntry.runner} at ${cliEntry.entry} (host=${host})`,
       )
 
       const env = supportsUserShell() ? getUserShellEnv() : { ...process.env }
-      env.ELECTRON_RUN_AS_NODE = "1"
+      if (cliEntry.runner !== "standalone") {
+        env.ELECTRON_RUN_AS_NODE = "1"
+      }
 
       const spawnDetails = supportsUserShell()
-        ? buildUserShellCommand(`ELECTRON_RUN_AS_NODE=1 exec ${this.buildCommand(cliEntry, args)}`)
+        ? buildUserShellCommand(
+            `${cliEntry.runner === "standalone" ? "" : "ELECTRON_RUN_AS_NODE=1 "}exec ${
+              cliEntry.runner === "standalone" ? this.buildExecutableCommand(cliEntry.entry, args) : this.buildCommand(cliEntry, args)
+            }`,
+          )
         : this.buildDirectSpawn(cliEntry, args)
 
       const detached = process.platform !== "win32"
@@ -563,6 +568,10 @@ export class CliProcessManager extends EventEmitter {
   }
 
   private buildCommand(cliEntry: CliEntryResolution, args: string[]): string {
+    if (cliEntry.runner === "standalone") {
+      return this.buildExecutableCommand(cliEntry.entry, args)
+    }
+
     const parts = [JSON.stringify(process.execPath)]
     if (cliEntry.runner === "tsx" && cliEntry.runnerPath) {
       parts.push(JSON.stringify(cliEntry.runnerPath))
@@ -577,6 +586,10 @@ export class CliProcessManager extends EventEmitter {
   }
 
   private buildDirectSpawn(cliEntry: CliEntryResolution, args: string[]) {
+    if (cliEntry.runner === "standalone") {
+      return { command: cliEntry.entry, args }
+    }
+
     if (cliEntry.runner === "tsx") {
       return { command: process.execPath, args: [cliEntry.runnerPath!, cliEntry.entry, ...args] }
     }
@@ -593,9 +606,8 @@ export class CliProcessManager extends EventEmitter {
       const devEntry = this.resolveDevEntry()
       return { entry: devEntry, runner: "tsx", runnerPath: tsxPath }
     }
- 
-    const distEntry = this.resolveProdEntry()
-    return { entry: distEntry, runner: "node" }
+
+    return { entry: this.resolveStandaloneProdEntry(), runner: "standalone" }
   }
  
   private resolveTsx(): string | null {
@@ -635,20 +647,25 @@ export class CliProcessManager extends EventEmitter {
     return entry
   }
  
-  private resolveProdEntry(): string {
-    try {
-      const entry = nodeRequire.resolve("@neuralnomads/codenomad/dist/bin.js")
-      if (existsSync(entry)) {
-        return entry
+  private resolveStandaloneProdEntry(): string {
+    const executableName = process.platform === "win32" ? "codenomad-server.exe" : "codenomad-server"
+    const candidates = [
+      path.join(process.resourcesPath, "server", "dist", executableName),
+      path.join(mainDirname, "../resources/server/dist", executableName),
+      path.resolve(process.cwd(), "..", "server", "dist", executableName),
+    ]
+
+    for (const candidate of candidates) {
+      if (existsSync(candidate)) {
+        return candidate
       }
-    } catch {
-      // fall through to error below
     }
-    throw new Error("Unable to locate CodeNomad CLI build (dist/bin.js). Run npm run build --workspace @neuralnomads/codenomad.")
+
+    throw new Error(`Unable to locate standalone CodeNomad server executable (${executableName}). Run npm run build:standalone --workspace @neuralnomads/codenomad.`)
   }
 
-  private shouldUsePackagedShellSupervisor(options: StartOptions): boolean {
-    return !options.dev && app.isPackaged && process.platform === "darwin"
+  private shouldUsePackagedShellSupervisor(options: StartOptions, cliEntry: CliEntryResolution): boolean {
+    return !options.dev && app.isPackaged && process.platform === "darwin" && cliEntry.runner !== "standalone"
   }
 
   private resolveCliSupervisorPath(): string {
@@ -666,26 +683,6 @@ export class CliProcessManager extends EventEmitter {
     throw new Error("Unable to locate CodeNomad CLI supervisor script.")
   }
 
-  private resolveShellNodeCommand(): string {
-    const configured = process.env.NODE_BINARY?.trim()
-    return configured && configured.length > 0 ? configured : "node"
-  }
-
-  private resolveBundledProdEntry(): string {
-    const candidates = [
-      path.join(process.resourcesPath, "server", "dist", "bin.js"),
-      path.join(mainDirname, "../resources/server/dist/bin.js"),
-    ]
-
-    for (const candidate of candidates) {
-      if (existsSync(candidate)) {
-        return candidate
-      }
-    }
-
-    throw new Error("Unable to locate bundled CodeNomad CLI build in app resources.")
-  }
-
   private describeUtilityProcessError(error: unknown): string {
     if (error instanceof Error && error.message) {
       return error.message