ci: isolate test setup and fix Windows PDF font paths

tests/chat-flow.test.ts

@@ -1598,7 +1598,8 @@ describe("duplicate provider tool-call ids (the Lacan fix)", () => {
 			() => fauxAssistantMessage([fauxText("Right — and that is where Lacan begins.")]),
 		]);
 
-		const chat = chatStore.createChat("Lacan: duplicate call_0 turns");
+		const chat = createConfiguredChat("Lacan: duplicate call_0 turns");
+		createdChats.push(chat.id);
 		// Turn 1: the ask question.
 		await drainTurn(post(chat.id, { type: "text", text: "teach me Lacan" }), agentFactory(engine));
 		let saved = chatStore.getChat(chat.id)!;

tests/keyboard-toggle-sidebar.test.ts

@@ -4,6 +4,7 @@ import {
 	actionForBinding,
 	bindingForAction,
 	formatBinding,
+	IS_MAC,
 	kbdEventForAction,
 	KEYBOARD_ACTIONS,
 } from "../src/core/keyboard.ts";
@@ -40,7 +41,7 @@ describe("the ⌘B chain — keypress → binding → action → event", () => {
 	it("mod+b is the toggle-sidebar action", () => {
 		assert.equal(actionForBinding("mod+b"), "toggle-sidebar");
 		assert.equal(bindingForAction("toggle-sidebar"), "mod+b");
-		assert.equal(formatBinding("mod+b"), "⌘B");
+		assert.equal(formatBinding("mod+b"), IS_MAC ? "⌘B" : "Ctrl+B");
 	});
 
 	it("the event the chain ends in is the one the sidebar answers on", () => {
@@ -51,9 +52,9 @@ describe("the ⌘B chain — keypress → binding → action → event", () => {
 });
 
 describe("the thinking pill suffix — ⇧⇥ via the registry", () => {
-	it("shift+tab formats as ⇧⇥ and maps to cycle-thinking", () => {
+	it("shift+tab uses the platform's modifier label and maps to cycle-thinking", () => {
 		assert.equal(actionForBinding("shift+tab"), "cycle-thinking");
-		assert.equal(formatBinding("shift+tab"), "⇧⇥");
+		assert.equal(formatBinding("shift+tab"), IS_MAC ? "⇧⇥" : "Shift+⇥");
 	});
 });
 

tests/pdf-native-render.test.ts

@@ -7,9 +7,11 @@
  * this process).
  */
 import assert from "node:assert/strict";
+import * as fs from "node:fs";
 import * as path from "node:path";
 import { describe, it } from "node:test";
 import { realHeadless } from "../src/agent/subagents/headless.ts";
+import { standardFontsDir } from "../src/agent/subagents/pdf-ops.ts";
 
 const FIXTURE = path.join(import.meta.dirname, "fixtures", "sample-3page.pdf");
 
@@ -30,6 +32,12 @@ function pngFacts(buf: Buffer): { w: number; h: number; idats: number } {
 }
 
 describe("native pdf_render (pdfjs paints, @napi-rs/canvas hosts)", () => {
+	it("the shared font directory ends in pdfjs's required slash on every OS", () => {
+		const fonts = standardFontsDir();
+		assert.ok(fonts.endsWith("/"), "pdfjs rejects a trailing Windows backslash");
+		assert.ok(fs.statSync(fonts).isDirectory(), "the filesystem accepts the shared font path");
+	});
+
 	it("renders fixture pages as canonical single-IDAT PNGs", async () => {
 		const pages = await realHeadless.renderPdfPages(FIXTURE, [1, 3], { dpi: 150 });
 		assert.equal(pages.length, 2, "requested pages 1 and 3");

tests/tooltip-mechanism.test.tsx

@@ -3,10 +3,9 @@
  * icon/pill controls ride the styled Radix tooltip via Hint, the shortcut
  * appended as an em-dash suffix off the LIVE registry (a rebind changes
  * the suffix); truncation-reveals keep native title=; the copy carries no
- * internal vocabulary. Node has no navigator → IS_MAC is false → the mod
- * glyph renders "Ctrl+" here; the composition logic is the pin, not the
- * platform glyph. (Node 26 ships navigator.platform — on this Mac the real
- * ⌘/⇧ glyphs render, so they're pinned as-is.)
+ * internal vocabulary. Node 26 exposes the host platform through navigator,
+ * so expectations cover Mac glyphs AND Ctrl+/Shift+ elsewhere. Composition
+ * is the pin; running on a Mac must not be a test prerequisite.
  */
 
 import React from "react";
@@ -19,12 +18,13 @@ import { renderToStaticMarkup } from "react-dom/server";
 import { Hint, hintText } from "../components/ui/hint.tsx";
 import { TOOLTIP_DELAY_MS } from "../components/ui/tooltip.tsx";
 import { AUTO_UPDATE_HINT } from "../components/settings/settings-dialog.tsx";
+import { IS_MAC } from "../src/core/keyboard.ts";
 
 describe("hintText — the parenthesized composition", () => {
 	it("a registry action appends the LIVE binding (override-aware source)", () => {
-		assert.equal(hintText("Dictate", "toggle-dictation"), "Dictate (⌘D)");
-		assert.equal(hintText("Settings", "open-settings"), "Settings (⌘,)");
-		assert.equal(hintText("Search sessions", "sessions-search"), "Search sessions (⌘⇧F)");
+		assert.equal(hintText("Dictate", "toggle-dictation"), IS_MAC ? "Dictate (⌘D)" : "Dictate (Ctrl+D)");
+		assert.equal(hintText("Settings", "open-settings"), IS_MAC ? "Settings (⌘,)" : "Settings (Ctrl+,)");
+		assert.equal(hintText("Search sessions", "sessions-search"), IS_MAC ? "Search sessions (⌘⇧F)" : "Search sessions (Ctrl+Shift+F)");
 	});
 
 	it("surface-owned keys ride the binding prop (no registry entry)", () => {