refactor: use one editorial presentation canvas

web/apps/console/src/presentation/PresentationCanvas.test.tsx

@@ -17,17 +17,11 @@ describe("PresentationCanvas", () => {
     const canvas = screen.getByTestId("presentation-canvas");
 
     expect(canvas).toHaveClass("presentation-canvas");
-    expect(canvas).toHaveAttribute("data-stage-theme", "paper");
+    expect(canvas).not.toHaveAttribute("data-stage-theme");
     expect(canvas.style.transform).toBe("");
     expect(canvas).toHaveTextContent("Scene");
   });
 
-  it("applies the authored night stage theme without changing canvas geometry", () => {
-    render(<PresentationCanvas stageTheme="night"><div>Scene</div></PresentationCanvas>);
-
-    expect(screen.getByTestId("presentation-canvas")).toHaveAttribute("data-stage-theme", "night");
-  });
-
   it("uses CSS ratio bounds instead of JavaScript scale calculations", () => {
     expect(editorialCss).toContain("width: min(100dvw, calc(100dvh * 16 / 9))");
     expect(editorialCss).toContain("height: min(100dvh, calc(100dvw * 9 / 12))");

web/apps/console/src/presentation/PresentationCanvas.tsx

@@ -1,12 +1,10 @@
 import type { ReactNode } from "react";
-import type { StageTheme } from "./storyboard.js";
 
 type PresentationCanvasProps = {
   readonly children: ReactNode;
-  readonly stageTheme?: StageTheme;
 };
 
-export const PresentationCanvas = ({ children, stageTheme = "paper" }: PresentationCanvasProps) => (
+export const PresentationCanvas = ({ children }: PresentationCanvasProps) => (
   <div className="presentation-viewport">
     {/*
       Keep the presentation as normal responsive DOM instead of scaling the
@@ -17,7 +15,6 @@ export const PresentationCanvas = ({ children, stageTheme = "paper" }: Presentat
     <div
       className="presentation-canvas"
       data-testid="presentation-canvas"
-      data-stage-theme={stageTheme}
     >
       {children}
     </div>

web/apps/console/src/presentation/PresentationRoute.tsx

@@ -13,7 +13,7 @@ import {
   presentationReducer,
 } from "./presentation-state.js";
 import { hashForLocation } from "./storyboard-navigation.js";
-import { findScene, type MainLocation } from "./storyboard.js";
+import type { MainLocation } from "./storyboard.js";
 import type { DemoApprovalActions, DemoApprovalUiState } from "./demo-approval-actions.js";
 import "./presentation.css";
 import "./styles/demo-workflow.css";
@@ -224,13 +224,9 @@ export const PresentationRoute = () => {
     [],
   );
 
-  const stageTheme = state.location.kind === "main"
-    ? findScene(state.location.sceneId)?.stageTheme ?? "paper"
-    : "paper";
-
   return (
     <main className="presentation-route" aria-label="lda.chat presentation" data-motion={state.motionDisabled ? "disabled" : "enabled"}>
-      <PresentationCanvas stageTheme={stageTheme}>
+      <PresentationCanvas>
         <PresentationStage
           state={state}
           demo={demo}

web/apps/console/src/presentation/SceneBody.tsx

@@ -62,9 +62,16 @@ const DiscussionLinks = ({
   );
 };
 
+const actForSceneNumber = (sceneNumber: number): string => {
+  if (sceneNumber <= 3) return "I";
+  if (sceneNumber <= 12) return "II";
+  if (sceneNumber === 13) return "III";
+  return "IV";
+};
+
 const NarrativeScene = ({ scene, beat }: { scene: SceneDefinition; beat: SceneBeatDefinition }) => (
   <>
-    <StageCaption eyebrow={`Act ${scene.stageTheme === "paper" ? "I" : "II"} · ${scene.claimClass}`} title={scene.title}>
+    <StageCaption eyebrow={`Act ${actForSceneNumber(scene.number)} · ${scene.claimClass}`} title={scene.title}>
       <p>{beat.caption}</p>
     </StageCaption>
     <p className="scene-body__evidence">{scene.evidencePointer}</p>

web/apps/console/src/presentation/conclusion/ConclusionScene.test.tsx

@@ -8,7 +8,6 @@ const scene = {
   title: "Contribution and future work",
   claimClass: "future-work" as const,
   evidencePointer: "Thesis conclusion",
-  stageTheme: "night" as const,
   view: "conclusion" as const,
   beats: [],
 };

web/apps/console/src/presentation/evaluation/EvaluationEvidenceScene.test.tsx

@@ -8,7 +8,6 @@ const scene = {
   title: "Evaluation",
   claimClass: "evaluated" as const,
   evidencePointer: "Thesis Evaluation and Appendix C",
-  stageTheme: "paper" as const,
   view: "evaluation" as const,
   beats: [],
 };

web/apps/console/src/presentation/figures/interactive-figure.css

@@ -193,7 +193,7 @@
 /* Semantic kind colors */
 .figure-node[data-figure-node-kind="actor"],
 .figure-node[data-figure-node-kind="operation"] {
-  border-color: var(--color-intent, oklch(0.53 0.17 250));
+  border-color: var(--color-editorial-ink, oklch(0.19 0.015 65));
 }
 
 .figure-node[data-figure-node-kind="runtime"] {
@@ -245,14 +245,6 @@
   font-weight: 600;
 }
 
-.presentation-canvas[data-stage-theme="night"] .figure-breadcrumbs {
-  color: var(--text-secondary, oklch(0.78 0.035 250));
-}
-
-.presentation-canvas[data-stage-theme="night"] .figure-breadcrumbs__crumb[aria-current="page"] {
-  color: var(--text-primary, oklch(0.96 0.01 250));
-}
-
 .figure-breadcrumbs__crumb + .figure-breadcrumbs__crumb::before {
   content: "\203A";
   margin-right: 4px;

web/apps/console/src/presentation/presentation.css

@@ -19,31 +19,20 @@
   --chat-width: 18rem;
 }
 
-.presentation-canvas[data-stage-theme="night"] .presentation-stage__primary {
-  background: var(--stage-canvas);
-  color: var(--text-primary);
-}
-
-.presentation-canvas[data-stage-theme="paper"] .presentation-stage__primary {
+.presentation-stage__primary {
   background: var(--color-editorial-paper, oklch(0.975 0.012 82));
   color: var(--color-editorial-ink, oklch(0.19 0.015 65));
 }
 
-/* The console's global section rule must not turn night-mode slide roots white. */
-.presentation-canvas[data-stage-theme="night"] .presentation-stage__primary > .stage-caption,
-.presentation-canvas[data-stage-theme="night"] .architecture-scene > .stage-caption,
-.presentation-canvas[data-stage-theme="night"] .presentation-stage__primary > .architecture-scene,
-.presentation-canvas[data-stage-theme="night"] .presentation-stage__primary > .scene-body__authoring-composition {
+/* Presentation roots own their visual surfaces; do not inherit console cards. */
+.presentation-stage__primary > .architecture-scene,
+.presentation-stage__primary > .scene-body__authoring-composition,
+.presentation-stage__primary > .prepared-lifecycle-scene {
+  margin: 0;
+  border: 0;
+  border-radius: 0;
+  padding: 0;
   background: transparent;
-  color: var(--text-primary);
-  border-color: var(--stage-line);
-}
-
-.presentation-canvas[data-stage-theme="night"] .presentation-stage__primary > .prepared-lifecycle-scene {
-  background: var(--stage-canvas);
-  color: var(--text-primary);
-  border-color: var(--stage-line);
-  margin-bottom: 0;
 }
 
 .presentation-stage {
@@ -295,7 +284,7 @@
 }
 
 .stage-caption__eyebrow {
-  color: oklch(0.78 0.035 250);
+  color: var(--color-editorial-muted, oklch(0.48 0.025 65));
   font-size: 0.8rem;
   text-transform: uppercase;
   letter-spacing: 0.08em;
@@ -326,7 +315,7 @@
 .scene-body__evidence {
   flex-shrink: 0;
   margin: 0.55rem 0 0;
-  color: oklch(0.62 0.05 250);
+  color: var(--color-editorial-muted, oklch(0.48 0.025 65));
   font-size: 0.8rem;
 }
 

web/apps/console/src/presentation/scenes/ArchitectureScene.test.tsx

@@ -37,7 +37,6 @@ const mockScene = {
   title: "Architecture Zoom",
   claimClass: "implemented" as const,
   evidencePointer: "Thesis System Architecture",
-  stageTheme: "night" as const,
   view: "architecture" as const,
   beats: [],
 };

web/apps/console/src/presentation/storyboard.test.ts

@@ -42,10 +42,7 @@ describe("defense storyboard catalog", () => {
     expect(findBeat("conclusion", "questions")?.chatMode).toBe("hidden");
   });
 
-  it("uses act-level stage themes and independent chat composition", () => {
-    expect(mainScenes.slice(0, 3).every((scene) => scene.stageTheme === "paper")).toBe(true);
-    expect(mainScenes.slice(3, 12).every((scene) => scene.stageTheme === "night")).toBe(true);
-    expect(mainScenes.slice(12).every((scene) => scene.stageTheme === "paper")).toBe(true);
+  it("uses one editorial canvas theme and independent chat composition", () => {
     expect(findBeat("agent-handoff", "request")?.chatMode).toBe("hidden");
     expect(findBeat("resume-output-evidence", "trace")?.chatMode).toBe("hidden");
   });

web/apps/console/src/presentation/storyboard.ts

@@ -1,5 +1,4 @@
 export type ClaimClass = "motivation" | "implemented" | "evaluated" | "external-context" | "future-work";
-export type StageTheme = "paper" | "night";
 export type ChatTheme = "light" | "dark";
 export type ChatMode = "hidden" | "full" | "rail" | "dock";
 export type EvidencePresentation = "hidden" | "receipt" | "inspector";
@@ -39,7 +38,6 @@ export type SceneDefinition = {
   readonly title: string;
   readonly claimClass: ClaimClass;
   readonly evidencePointer: string;
-  readonly stageTheme: StageTheme;
   readonly view: SceneView;
   readonly beats: readonly SceneBeatDefinition[];
 };
@@ -68,7 +66,6 @@ export const mainScenes = defineScenes([
     title: "Thesis",
     claimClass: "implemented",
     evidencePointer: "Thesis Abstract and Introduction",
-    stageTheme: "paper",
     view: "narrative",
     beats: [
       sceneBeat("title", "Design and Implementation of lda.chat", "The project began as a pursuit of an AI agent for workspace automation."),
@@ -81,7 +78,6 @@ export const mainScenes = defineScenes([
     title: "The Problem",
     claimClass: "motivation",
     evidencePointer: "Thesis Problem Statement and Requirements",
-    stageTheme: "paper",
     view: "narrative",
     beats: [
       sceneBeat("direct-actions", "Direct actions are not reusable automation", "A tool loop can act without owning durable lifecycle records."),
@@ -94,7 +90,6 @@ export const mainScenes = defineScenes([
     title: "Positioning and Related Systems",
     claimClass: "motivation",
     evidencePointer: "Thesis Positioning and Related Systems",
-    stageTheme: "paper",
     view: "positioning",
     beats: [
       sceneBeat("landscape", "Different centers of gravity", "Tool loops, scripts, hosted automation, agent graphs, and MCP solve different parts of the problem."),
@@ -107,7 +102,6 @@ export const mainScenes = defineScenes([
     title: "Planner and Runtime",
     claimClass: "implemented",
     evidencePointer: "Thesis Architecture Overview",
-    stageTheme: "night",
     view: "boundary",
     beats: [
       sceneBeat("planner", "External planner", "The planner proposes and revises workflow structure."),
@@ -121,7 +115,6 @@ export const mainScenes = defineScenes([
     title: "Workflow Lifecycle",
     claimClass: "implemented",
     evidencePointer: "Thesis Workflow Lifecycle",
-    stageTheme: "night",
     view: "lifecycle",
     beats: [
       sceneBeat("draft", "Draft", "Mutable iterative authoring state."),
@@ -136,7 +129,6 @@ export const mainScenes = defineScenes([
     title: "Architecture Zoom",
     claimClass: "implemented",
     evidencePointer: "Thesis System Architecture; docs/project_map.md; docs/source_architecture.md",
-    stageTheme: "night",
     view: "architecture",
     beats: [
       sceneBeat("client", "Client operations", "Human and agent clients use the same public lifecycle surface.", { figure: { catalogId: "system-architecture", focusPath: [], activeNodeId: "client-operations" } }),
@@ -151,7 +143,6 @@ export const mainScenes = defineScenes([
     title: "Author, Validate, Repair",
     claimClass: "implemented",
     evidencePointer: "CLI documentation; draft authoring API; challenge UX findings",
-    stageTheme: "night",
     view: "authoring",
     beats: [
       sceneBeat("discover", "Discover", "Inspect capabilities and schemas before authoring."),
@@ -166,7 +157,6 @@ export const mainScenes = defineScenes([
     title: "Agent Handoff",
     claimClass: "implemented",
     evidencePointer: "Constrained demo agent and prepared replay recipe",
-    stageTheme: "night",
     view: "agent",
     beats: [
       // Scene 8 renders its own full-screen prepared transcript in the primary
@@ -181,7 +171,6 @@ export const mainScenes = defineScenes([
     title: "Prepared Workflow Lifecycle",
     claimClass: "implemented",
     evidencePointer: "examples/lda_report_workflow; deployment inspect replay evidence",
-    stageTheme: "night",
     view: "demo-lifecycle",
     beats: [
       sceneBeat("discover", "Discover capabilities", "Inspect available sources, capabilities, and schemas before authoring.", { chatMode: "hidden", chatTheme: "light" }),
@@ -197,7 +186,6 @@ export const mainScenes = defineScenes([
     title: "Run From Deployment",
     claimClass: "implemented",
     evidencePointer: "workflow.runs.start replay evidence",
-    stageTheme: "night",
     view: "demo",
     beats: [
       sceneBeat("input", "Workflow input", "The run starts from selected documents and an issue board path.", { chatMode: "hidden", chatTheme: "light" }),
@@ -211,7 +199,6 @@ export const mainScenes = defineScenes([
     title: "Typed Human Boundary",
     claimClass: "implemented",
     evidencePointer: "typed interrupt payload and resume contract",
-    stageTheme: "night",
     view: "demo",
     beats: [
       sceneBeat("interrupt", "Interrupt payload", "Execution reaches a declared issue-review boundary.", { chatMode: "hidden", chatTheme: "light" }),
@@ -225,7 +212,6 @@ export const mainScenes = defineScenes([
     title: "Resume, Output, Evidence",
     claimClass: "implemented",
     evidencePointer: "workflow.runs.resume, workflow output, and trace replay evidence",
-    stageTheme: "night",
     view: "demo",
     beats: [
       sceneBeat("resume", "Resume", "The submitted payload resumes the same persisted run.", { chatMode: "hidden", chatTheme: "light" }),
@@ -239,7 +225,6 @@ export const mainScenes = defineScenes([
     title: "Evaluation",
     claimClass: "evaluated",
     evidencePointer: "Thesis Evaluation and Appendix C",
-    stageTheme: "paper",
     view: "evaluation",
     beats: [
       sceneBeat("cohort", "36-trial cohort", "Two challenges, two hosted models, three profiles, and three waves.", { chatMode: "hidden" }),
@@ -253,7 +238,6 @@ export const mainScenes = defineScenes([
     title: "Limits and Conclusion",
     claimClass: "future-work",
     evidencePointer: "Thesis Limitations, Future Work, and Conclusion",
-    stageTheme: "paper",
     view: "conclusion",
     beats: [
       sceneBeat("limits", "Implemented boundary", "The prototype is not a production sandbox, scheduler, or broad agent benchmark.", { chatMode: "hidden" }),

web/apps/console/src/presentation/styles/editorial.css

@@ -40,8 +40,3 @@
   container-name: presentation-canvas;
   container-type: inline-size;
 }
-
-.presentation-canvas[data-stage-theme="night"] {
-  background: oklch(0.12 0.025 250);
-  color: oklch(0.96 0.01 250);
-}