feat(electrobun): auto-updater + E2E tests + splash screen — ALL GAPS CLOSED

Auto-updater:
- updater.ts: GitHub Releases API check, semver comparison, timestamp tracking
- AdvancedSettings wired to real updater.check/getVersion RPC

E2E testing (45 tests):
- wdio.conf.js: WebDriverIO config for Electrobun (port 9761)
- fixtures.ts: isolated temp dirs, demo data, git repo init
- 4 spec files: smoke (13), settings (13), terminal (10), agent (9)

Splash screen:
- SplashScreen.svelte: animated gradient AGOR logo, version, loading dots
- App.svelte: shows splash until all init promises resolve, 300ms fade-out

ui-electrobun/tests/e2e/wdio.conf.js

@@ -0,0 +1,99 @@
+/**
+ * WebDriverIO configuration for Electrobun E2E tests.
+ *
+ * Electrobun uses WebKitGTK under the hood on Linux — we drive it via
+ * WebDriver (same as Tauri's approach with tauri-driver).
+ * Port 9760 matches our Vite dev port convention.
+ */
+
+import { execSync } from "node:child_process";
+import { resolve, dirname } from "node:path";
+import { fileURLToPath } from "node:url";
+import { existsSync } from "node:fs";
+import { createTestFixture } from "./fixtures.ts";
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+const projectRoot = resolve(__dirname, "../..");
+
+// Electrobun built binary path (canary build output)
+const electrobunBinary = resolve(projectRoot, "build/Agent Orchestrator");
+
+// Test fixture — isolated config/data dirs
+const fixture = createTestFixture("agor-ebun-e2e");
+
+process.env.AGOR_TEST = "1";
+process.env.AGOR_TEST_DATA_DIR = fixture.dataDir;
+process.env.AGOR_TEST_CONFIG_DIR = fixture.configDir;
+
+const WEBDRIVER_PORT = 9761;
+
+console.log(`Test fixture created at ${fixture.rootDir}`);
+
+export const config = {
+  // ── Runner ──
+  runner: "local",
+  maxInstances: 1,
+
+  // ── Connection ──
+  hostname: "localhost",
+  port: WEBDRIVER_PORT,
+  path: "/",
+
+  // ── Specs ──
+  specs: [
+    resolve(__dirname, "specs/smoke.test.ts"),
+    resolve(__dirname, "specs/settings.test.ts"),
+    resolve(__dirname, "specs/terminal.test.ts"),
+    resolve(__dirname, "specs/agent.test.ts"),
+  ],
+
+  // ── Capabilities ──
+  capabilities: [
+    {
+      "wdio:enforceWebDriverClassic": true,
+      browserName: "webkit",
+    },
+  ],
+
+  // ── Framework ──
+  framework: "mocha",
+  mochaOpts: {
+    ui: "bdd",
+    timeout: 120_000,
+  },
+
+  // ── Reporter ──
+  reporters: ["spec"],
+
+  // ── Logging ──
+  logLevel: "warn",
+
+  // ── Timeouts ──
+  waitforTimeout: 10_000,
+  connectionRetryTimeout: 30_000,
+  connectionRetryCount: 3,
+
+  // ── Hooks ──
+
+  onPrepare() {
+    if (!existsSync(electrobunBinary) && !process.env.SKIP_BUILD) {
+      console.log("Building Electrobun canary...");
+      execSync("vite build && electrobun build --env=canary", {
+        cwd: projectRoot,
+        stdio: "inherit",
+      });
+    }
+
+    if (!existsSync(electrobunBinary)) {
+      throw new Error(
+        `Electrobun binary not found at ${electrobunBinary}. ` +
+          "Run 'bun run build:canary' first.",
+      );
+    }
+  },
+
+  afterSession() {
+    fixture.cleanup();
+    console.log("Test fixture cleaned up.");
+  },
+};