fix(app): stabilize runtime, polish chat UI, and harden pty packaging

- restore spawn-helper +x via electron-builder afterPack hook
- preserve goal elapsed timing across dock remounts
- ignore benign promise rejections in renderer global error handler
- refine PixelLoader, StatusIcon, PlanProposal, and composer glow styling
- guard stale thread sweep and shell start with toast feedback
- tighten thread session manager pty resolution and permissions

Author: SDSLeon

build/after-pack.cjs

@@ -0,0 +1,59 @@
+// electron-builder afterPack hook.
+//
+// node-pty ships a `spawn-helper` binary that posix_spawn invokes to set up
+// the pty. electron-builder's asar-unpack copy can strip the execute bit,
+// which makes posix_spawnp fail at runtime with the opaque
+// "posix_spawnp failed." error. Restore +x on every prebuild we ship.
+
+const { existsSync, statSync, chmodSync, readdirSync } = require("node:fs");
+const { join } = require("node:path");
+
+function ensureExecutable(path) {
+  if (!existsSync(path)) return false;
+  const stat = statSync(path);
+  if (!stat.isFile()) return false;
+  if ((stat.mode & 0o111) === 0o111) return false;
+  chmodSync(path, stat.mode | 0o111);
+  return true;
+}
+
+function findResourcesDir(appOutDir, electronPlatformName) {
+  if (electronPlatformName === "darwin" || electronPlatformName === "mas") {
+    const entries = readdirSync(appOutDir).filter((name) => name.endsWith(".app"));
+    if (entries.length === 0) return null;
+    return join(appOutDir, entries[0], "Contents", "Resources");
+  }
+  if (electronPlatformName === "linux") {
+    return join(appOutDir, "resources");
+  }
+  if (electronPlatformName === "win32") {
+    return join(appOutDir, "resources");
+  }
+  return null;
+}
+
+function chmodNodePtyHelpers(resourcesDir) {
+  const prebuildsRoot = join(
+    resourcesDir,
+    "app.asar.unpacked",
+    "node_modules",
+    "node-pty",
+    "prebuilds",
+  );
+  if (!existsSync(prebuildsRoot)) return [];
+  const fixed = [];
+  for (const platformDir of readdirSync(prebuildsRoot)) {
+    const helper = join(prebuildsRoot, platformDir, "spawn-helper");
+    if (ensureExecutable(helper)) fixed.push(helper);
+  }
+  return fixed;
+}
+
+module.exports = async function afterPack(context) {
+  const resourcesDir = findResourcesDir(context.appOutDir, context.electronPlatformName);
+  if (!resourcesDir) return;
+  const fixed = chmodNodePtyHelpers(resourcesDir);
+  for (const path of fixed) {
+    console.log(`[afterPack] chmod +x ${path}`);
+  }
+};

scripts/build-desktop-artifact.mjs

@@ -407,6 +407,8 @@ asarUnpack:
   - dist/main/claudeSdkProbeWorker.mjs
   - node_modules/@anthropic-ai/claude-agent-sdk/**/*
 
+afterPack: build/after-pack.cjs
+
 publish:
   provider: github
   owner: SDSLeon

src/renderer/actions/terminalActions.ts

@@ -1,10 +1,9 @@
 import { buildWorktreeLocation } from "@/shared/worktree";
-import { readBridge } from "@/renderer/bridge";
 import { useAppStore } from "@/renderer/state/appStore";
 import { useDevTerminalStore } from "@/renderer/state/devTerminalStore";
 import { usePanelStore } from "@/renderer/state/panelStore";
 import { useSharedSettings } from "@/renderer/state/sharedSettingsStore";
-import { writeScriptToShell } from "@/renderer/utils/shellUtils";
+import { startShellWithToast, writeScriptToShell } from "@/renderer/utils/shellUtils";
 import { closeAllPanels } from "./panelActions";
 
 function applyTerminalPanel(
@@ -86,10 +85,13 @@ export function runProjectAction(projectId: string, actionId: string, worktreePa
   }
   store.setActiveTab(tab.id);
 
-  void readBridge().startShell({
-    shellId: tab.id,
-    projectLocation: location,
-    ...(worktreePath ? { worktreePath } : {}),
-  });
+  startShellWithToast(
+    {
+      shellId: tab.id,
+      projectLocation: location,
+      ...(worktreePath ? { worktreePath } : {}),
+    },
+    tabLabel,
+  );
   writeScriptToShell(tab.id, action.command);
 }

src/renderer/actions/threadActions.ts

@@ -166,11 +166,16 @@ export function sweepStaleThreads(): void {
     if (
       visibleThreadIds.has(thread.id) ||
       (thread.status !== "idle" && thread.status !== "finished") ||
-      !thread.sessionRef ||
-      new Date(thread.updatedAt).getTime() > staleBefore
+      !thread.sessionRef
     ) {
       continue;
     }
+    const updatedAtMs = new Date(thread.updatedAt).getTime();
+    const lastViewedAtMs = store.lastViewedAtByThreadId[thread.id] ?? 0;
+    const lastActiveMs = Math.max(updatedAtMs, lastViewedAtMs);
+    if (lastActiveMs > staleBefore) {
+      continue;
+    }
 
     void unloadStoredThread(thread.id).catch(() => undefined);
   }

src/renderer/commands/registry.ts

@@ -17,7 +17,7 @@ import { useDevTerminalStore } from "@/renderer/state/devTerminalStore";
 import { useFileEditorStore } from "@/renderer/state/fileEditorStore";
 import { usePanelStore } from "@/renderer/state/panelStore";
 import { useSharedSettings } from "@/renderer/state/sharedSettingsStore";
-import { writeScriptToShell } from "@/renderer/utils/shellUtils";
+import { startShellWithToast, writeScriptToShell } from "@/renderer/utils/shellUtils";
 import { useCommandPaletteStore } from "./commandPaletteStore";
 import type { CommandWhenContext } from "./when";
 import { evaluateWhenClause } from "./when";
@@ -321,11 +321,14 @@ function runTerminalCommand(args: unknown): void {
   }
   terminal.setActiveTab(tab.id);
 
-  void readBridge().startShell({
-    shellId: tab.id,
-    projectLocation: location,
-    ...(worktreePath ? { worktreePath } : {}),
-  });
+  startShellWithToast(
+    {
+      shellId: tab.id,
+      projectLocation: location,
+      ...(worktreePath ? { worktreePath } : {}),
+    },
+    title,
+  );
   writeScriptToShell(tab.id, command);
 }
 

src/renderer/components/common/AnimatingPlanIcon.tsx

@@ -0,0 +1,23 @@
+import { SVGProps } from "react";
+
+export function AnimatingPlanIcon({ className, ...props }: SVGProps<SVGSVGElement>) {
+  return (
+    <svg
+      xmlns="http://www.w3.org/2000/svg"
+      viewBox="0 0 24 24"
+      fill="none"
+      stroke="currentColor"
+      strokeWidth="2"
+      strokeLinecap="round"
+      strokeLinejoin="round"
+      className={className}
+      {...props}
+    >
+      <path d="m3 7 2 2 4-4" className="lightcode-plan-check-1" />
+      <path d="m3 17 2 2 4-4" className="lightcode-plan-check-2" />
+      <path d="M13 6h8" />
+      <path d="M13 12h8" />
+      <path d="M13 18h8" />
+    </svg>
+  );
+}