fix(rgov): render canvas directly instead of redirecting to /rspace

The rgov module page was showing a static description with a link to
/rspace. Now it renders the actual canvas (same as rspace module) with
moduleId="rgov" so GovMod shapes display inline at /rgov.

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

modules/rgov/mod.ts

@@ -8,6 +8,7 @@
  */
 
 import { Hono } from "hono";
+import { resolve } from "path";
 import { renderShell } from "../../server/shell";
 import { getModuleInfoList } from "../../shared/module";
 import type { RSpaceModule } from "../../shared/module";
@@ -16,10 +17,53 @@ import { addShapes, getDocumentData } from "../../server/community-store";
 
 const routes = new Hono();
 
-// ── Module page (within a space) ──
+// ── Canvas content loader (same approach as rspace module) ──
 
-routes.get("/", (c) => {
+const DIST_DIR = resolve(import.meta.dir, "../../dist");
+let canvasCache: { body: string; styles: string; scripts: string } | null = null;
+
+function extractCanvasContent(html: string) {
+	const bodyMatch = html.match(/<body[^>]*>([\s\S]*?)<\/body>/i);
+	const styleMatches = [...html.matchAll(/<style[^>]*>([\s\S]*?)<\/style>/gi)];
+	const scriptMatches = [...html.matchAll(/<script[^>]*>[\s\S]*?<\/script>/gi)];
+	return {
+		body: bodyMatch?.[1] || "",
+		styles: styleMatches.map(m => m[0]).join("\n"),
+		scripts: scriptMatches.map(m => m[0]).join("\n"),
+	};
+}
+
+async function getCanvasContent() {
+	if (canvasCache) return canvasCache;
+
+	const moduleFile = Bun.file(resolve(DIST_DIR, "canvas-module.html"));
+	if (await moduleFile.exists()) {
+		canvasCache = {
+			body: await moduleFile.text(),
+			styles: "",
+			scripts: `<script type="module" src="/canvas-module.js"></script>`,
+		};
+		return canvasCache;
+	}
+
+	const fullFile = Bun.file(resolve(DIST_DIR, "canvas.html"));
+	if (await fullFile.exists()) {
+		canvasCache = extractCanvasContent(await fullFile.text());
+		return canvasCache;
+	}
+
+	return {
+		body: `<div style="padding:2rem;text-align:center;color:#64748b;">Canvas loading...</div>`,
+		styles: "",
+		scripts: "",
+	};
+}
+
+// ── Module page (within a space) — renders canvas directly ──
+
+routes.get("/", async (c) => {
 	const space = c.req.param("space") || "demo";
+	const canvas = await getCanvasContent();
 
 	return c.html(renderShell({
 		title: `${space} — rGov | rSpace`,
@@ -27,29 +71,9 @@ routes.get("/", (c) => {
 		spaceSlug: space,
 		modules: getModuleInfoList(),
 		theme: "dark",
-		body: `
+		body: canvas.body,
-			<div style="max-width:640px;margin:60px auto;padding:0 24px;color:#e2e8f0;font-family:system-ui,sans-serif;">
+		styles: canvas.styles,
-				<h1 style="font-size:28px;margin-bottom:8px;">⚖️ rGov — GovMods</h1>
+		scripts: canvas.scripts,
-				<p style="color:#94a3b8;margin-bottom:24px;">Do-ocratic circuit components for multiplayer collaboration</p>
-				<p style="color:#cbd5e1;line-height:1.6;margin-bottom:16px;">
-					Build governance decision circuits by wiring GovMods together on the canvas:
-				</p>
-				<ul style="color:#cbd5e1;line-height:1.8;margin-bottom:24px;padding-left:20px;">
-					<li><strong>Signoff Gates</strong> — Yes/No approval checkpoints</li>
-					<li><strong>Thresholds</strong> — Numeric targets (hours, dollars, signatures)</li>
-					<li><strong>Knobs</strong> — Tunable parameters with temporal viscosity</li>
-					<li><strong>Projects</strong> — Circuit aggregators showing "X of Y gates satisfied"</li>
-					<li><strong>Amendments</strong> — Propose in-place circuit modifications</li>
-					<li><strong>Quadratic Transform</strong> — Weight dampening (sqrt/log) for fair voting</li>
-					<li><strong>Conviction Accumulator</strong> — Time-weighted conviction scoring</li>
-					<li><strong>Multisig Gate</strong> — M-of-N approval multiplexor</li>
-					<li><strong>Sankey Visualizer</strong> — Auto-discovered governance flow diagram</li>
-				</ul>
-				<a href="/rspace" style="display:inline-block;background:linear-gradient(to right,#7c3aed,#1d4ed8);color:white;padding:10px 20px;border-radius:8px;text-decoration:none;font-weight:600;">
-					Open Canvas →
-				</a>
-			</div>
-		`,
 	}));
 });