feat(canvas): register 6 missing shape types for cross-rApp interop

Gov shapes (quadratic, conviction, multisig, sankey), exchange node,
and ASCII gen existed in lib/ with ports + serialization but were never
imported/defined/registered in canvas.html — now wired with toolbar
buttons, SHAPE_TO_MODULE gating, and click handlers.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

website/canvas.html

@@ -2076,6 +2076,10 @@
 					<button id="new-commitment-pool" title="Commitment Pool" data-requires-module="rtime">🧺 Commitments</button>
 					<button id="new-task-request" title="Task Request" data-requires-module="rtime">📋 Task Request</button>
 					<button id="new-multisig-email" title="Multi-Sig Email">✉️ Multi-Sig Email</button>
+					<button id="new-gov-quadratic" title="Quadratic Vote" data-requires-module="rgov">📐 Quadratic</button>
+					<button id="new-gov-conviction" title="Conviction Vote" data-requires-module="rgov">⏱️ Conviction Gov</button>
+					<button id="new-gov-multisig" title="Multi-Sig Governance" data-requires-module="rgov">🔏 Multi-Sig</button>
+					<button id="new-gov-sankey" title="Allocation Sankey" data-requires-module="rgov">🌊 Sankey Flow</button>
 				</div>
 			</div>
 
@@ -2088,6 +2092,7 @@
 					<button id="embed-flows" title="rFlows" data-requires-module="rflows">🌊 rFlows</button>
 					<button id="new-tx-builder" title="Transaction Builder" data-requires-module="rwallet">🔐 Tx Builder</button>
 					<button id="new-token" title="Token" data-requires-module="rwallet">🪙 Token</button>
+					<button id="new-exchange-node" title="Exchange Node" data-requires-module="rexchange">📈 Exchange</button>
 				</div>
 			</div>
 
@@ -2127,6 +2132,7 @@
 					<button id="new-video-gen" title="AI Video">🎬 AI Video</button>
 					<button id="new-zine-gen" title="Zine Gen">📰 Zine Gen</button>
 					<button id="new-mermaid-gen" title="Mermaid Diagram">🔀 Diagrams</button>
+					<button id="new-ascii-gen" title="ASCII Art">▓ ASCII Art</button>
 				</div>
 			</div>
 
@@ -2487,6 +2493,12 @@
 				FolkChoiceSpider,
 				FolkSpider3D,
 				FolkChoiceConviction,
+				FolkGovQuadratic,
+				FolkGovConviction,
+				FolkGovMultisig,
+				FolkGovSankey,
+				FolkExchangeNode,
+				FolkAsciiGen,
 				FolkSocialPost,
 				FolkSocialThread,
 				FolkSocialCampaign,
@@ -2723,6 +2735,12 @@
 			FolkChoiceSpider.define();
 			FolkSpider3D.define();
 			FolkChoiceConviction.define();
+			FolkGovQuadratic.define();
+			FolkGovConviction.define();
+			FolkGovMultisig.define();
+			FolkGovSankey.define();
+			FolkExchangeNode.define();
+			FolkAsciiGen.define();
 			FolkSocialPost.define();
 			FolkSocialThread.define();
 			FolkSocialCampaign.define();
@@ -2785,6 +2803,12 @@
 			shapeRegistry.register("folk-choice-spider", FolkChoiceSpider);
 			shapeRegistry.register("folk-spider-3d", FolkSpider3D);
 			shapeRegistry.register("folk-choice-conviction", FolkChoiceConviction);
+			shapeRegistry.register("folk-gov-quadratic", FolkGovQuadratic);
+			shapeRegistry.register("folk-gov-conviction", FolkGovConviction);
+			shapeRegistry.register("folk-gov-multisig", FolkGovMultisig);
+			shapeRegistry.register("folk-gov-sankey", FolkGovSankey);
+			shapeRegistry.register("folk-exchange-node", FolkExchangeNode);
+			shapeRegistry.register("folk-ascii-gen", FolkAsciiGen);
 			shapeRegistry.register("folk-social-post", FolkSocialPost);
 			shapeRegistry.register("folk-social-thread", FolkSocialThread);
 			shapeRegistry.register("folk-social-campaign", FolkSocialCampaign);
@@ -3968,8 +3992,13 @@ Use real coordinates, YYYY-MM-DD dates, ISO currency codes. Ask clarifying quest
 				"folk-transaction-builder": "rwallet",
 				"folk-commitment-pool": "rtime",
 				"folk-task-request": "rtime",
-				"folk-gov-binary": "rvote",
-				"folk-gov-threshold": "rvote",
+				"folk-gov-binary": "rgov",
+				"folk-gov-threshold": "rgov",
+				"folk-gov-quadratic": "rgov",
+				"folk-gov-conviction": "rgov",
+				"folk-gov-multisig": "rgov",
+				"folk-gov-sankey": "rgov",
+				"folk-exchange-node": "rexchange",
 				"folk-itinerary": "rtrips",
 				"folk-destination": "rtrips",
 				"folk-budget": "rtrips",
@@ -5085,6 +5114,56 @@ Use real coordinates, YYYY-MM-DD dates, ISO currency codes. Ask clarifying quest
 				});
 			});
 
+			// Governance shapes — quadratic, conviction, multisig, sankey
+			document.getElementById("new-gov-quadratic").addEventListener("click", () => {
+				setPendingTool("folk-gov-quadratic", {
+					title: "Quadratic Vote",
+					mode: "allocate",
+					entries: [
+						{ id: "e-1", label: "Option A", allocated: 0 },
+						{ id: "e-2", label: "Option B", allocated: 0 },
+						{ id: "e-3", label: "Option C", allocated: 0 },
+					],
+				});
+			});
+
+			document.getElementById("new-gov-conviction").addEventListener("click", () => {
+				setPendingTool("folk-gov-conviction", {
+					title: "Conviction Vote",
+					convictionMode: "linear",
+					threshold: 50,
+					stakes: [],
+				});
+			});
+
+			document.getElementById("new-gov-multisig").addEventListener("click", () => {
+				setPendingTool("folk-gov-multisig", {
+					title: "Multi-Sig Gate",
+					requiredM: 2,
+					signers: [
+						{ name: "Signer 1", signed: false },
+						{ name: "Signer 2", signed: false },
+						{ name: "Signer 3", signed: false },
+					],
+				});
+			});
+
+			document.getElementById("new-gov-sankey").addEventListener("click", () => {
+				setPendingTool("folk-gov-sankey", {
+					title: "Allocation Flow",
+				});
+			});
+
+			// Exchange node
+			document.getElementById("new-exchange-node").addEventListener("click", () => {
+				setPendingTool("folk-exchange-node", {});
+			});
+
+			// ASCII art generator
+			document.getElementById("new-ascii-gen").addEventListener("click", () => {
+				setPendingTool("folk-ascii-gen", {});
+			});
+
 			// Social media post
 			document.getElementById("new-social-post").addEventListener("click", () => {
 				setPendingTool("folk-social-post", {