fix: resolve 4 small issues reported in #663

1. Windows: `start` command opens CMD instead of browser during GitHub
   Copilot login — pass empty title arg so URL is treated as target
2. Launch banner missing Tavily provider in web search status display
3. MCPorter auto-installs via npm when not found (like ripgrep auto-download)
4. Notification prefs showing [object Object] — guard against non-boolean values

Closes #663

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

packages/pi-coding-agent/src/modes/interactive/components/login-dialog.ts

@@ -132,9 +132,14 @@ export class LoginDialogComponent extends Container implements Focusable {
 			this.contentContainer.addChild(new Text(theme.fg("warning", instructions), 1, 0));
 		}
 
-		// Try to open browser
+		// Try to open browser — on Windows, `start` needs an empty title arg
+		// so it treats the URL as a target, not a window title
 		const openCmd = process.platform === "darwin" ? "open" : process.platform === "win32" ? "start" : "xdg-open";
-		exec(`${openCmd} "${url}"`);
+		if (process.platform === "win32") {
+			exec(`start "" "${url}"`);
+		} else {
+			exec(`${openCmd} "${url}"`);
+		}
 
 		this.tui.requestRender();
 	}

src/resources/extensions/gsd/commands.ts

@@ -1095,7 +1095,7 @@ async function configureNotifications(ctx: ExtensionCommandContext, prefs: Recor
 
   for (const field of notifFields) {
     const current = notif[field.key];
-    const currentStr = current !== undefined ? String(current) : "";
+    const currentStr = current !== undefined && typeof current === "boolean" ? String(current) : "";
     const choice = await ctx.ui.select(
       `${field.label}${currentStr ? ` (current: ${currentStr})` : ` (default: ${field.defaultVal})`}:`,
       ["true", "false", "(keep current)"],

src/resources/extensions/mcporter/index.ts

@@ -418,12 +418,24 @@ export default function (pi: ExtensionAPI) {
 	pi.on("session_start", async (_event, ctx) => {
 		try {
 			const ver = (await runMcporter(["--version"], undefined, 5000)).trim();
-		ctx.ui.notify(`MCPorter ${ver} ready`, "info");
+			ctx.ui.notify(`MCPorter ${ver} ready`, "info");
 		} catch {
-			ctx.ui.notify(
-				"MCPorter not found. Install with: npm i -g mcporter",
-				"error",
-			);
+			ctx.ui.notify("MCPorter not found — attempting auto-install…", "warning");
+			try {
+				await new Promise<void>((resolve, reject) => {
+					exec("npm install -g mcporter", { timeout: 60000 }, (err) => {
+						if (err) reject(err);
+						else resolve();
+					});
+				});
+				const ver = (await runMcporter(["--version"], undefined, 5000)).trim();
+				ctx.ui.notify(`MCPorter ${ver} auto-installed ✓`, "info");
+			} catch {
+				ctx.ui.notify(
+					"MCPorter auto-install failed. Install manually: npm i -g mcporter",
+					"error",
+				);
+			}
 		}
 	});
 }

src/resources/extensions/search-the-web/native-search.ts

@@ -157,11 +157,13 @@ export function registerNativeSearchHooks(pi: NativeSearchPI): { getIsAnthropic:
     const hasBrave = !!process.env.BRAVE_API_KEY;
     const hasJina = !!process.env.JINA_API_KEY;
     const hasAnswers = !!process.env.BRAVE_ANSWERS_KEY;
+    const hasTavily = !!process.env.TAVILY_API_KEY;
 
     const parts: string[] = ["Web search v4 loaded"];
     if (hasBrave) parts.push("Brave ✓");
     if (hasAnswers) parts.push("Answers ✓");
     if (hasJina) parts.push("Jina ✓");
+    if (hasTavily) parts.push("Tavily ✓");
 
     ctx.ui.notify(parts.join(" · "), "info");
   });