feat: evolve investigation into guided conversation

tests/ui/scenario-form.test.jsx

@@ -885,7 +885,7 @@ describe("ReasoningWorkspace UI", () => {
     expect(html).toContain("Complaints increased while production increased.");
   });
 
-  it("shows current understanding section", () => {
+  it("shows what we've established section", () => {
     const html = renderToStaticMarkup(
       <ReasoningWorkspace
         {...makeWorkspaceProps({
@@ -899,29 +899,20 @@ describe("ReasoningWorkspace UI", () => {
       />,
     );
 
-    expect(html).toContain("Current understanding");
+    expect(html).toContain("What we&#x27;ve established");
     expect(html).toContain("Nodes: 2 observation, 1 unknown");
   });
 
-  it("shows current focus section with the active unknown", () => {
+  it("prominently displays the current investigation", () => {
     const html = renderToStaticMarkup(
       <ReasoningWorkspace {...makeWorkspaceProps()} />,
     );
 
-    expect(html).toContain("What we are working out");
-    expect(html).toContain("Complaint rate denominator");
-  });
-
-  it("prominently displays the next question", () => {
-    const html = renderToStaticMarkup(
-      <ReasoningWorkspace {...makeWorkspaceProps()} />,
-    );
-
-    expect(html).toContain("Next question");
+    expect(html).toContain("Current investigation");
     expect(html).toContain("What denominator is being used for the complaint rate?");
   });
 
-  it("shows reasoning progress with plain language instead of unexplained count", () => {
+  it("shows confidence-building progress text", () => {
     const html = renderToStaticMarkup(
       <ReasoningWorkspace
         {...makeWorkspaceProps({
@@ -935,11 +926,11 @@ describe("ReasoningWorkspace UI", () => {
       />,
     );
 
-    expect(html).toContain("Reasoning progress");
+    expect(html).toContain("We are still building confidence about your situation");
     expect(html).not.toContain("3 remaining");
   });
 
-  it("explains areas that still need investigation in the progress card", () => {
+  it("explains areas that still need investigation in plain language", () => {
     const html = renderToStaticMarkup(
       <ReasoningWorkspace {...makeWorkspaceProps()} />,
     );
@@ -980,7 +971,7 @@ describe("ReasoningWorkspace UI", () => {
       <ReasoningWorkspace {...makeWorkspaceProps()} />,
     );
 
-    expect(html).toContain("Your answer");
+    expect(html).toContain("Your response");
     expect(html).toContain("Update situation");
   });
 
@@ -1018,9 +1009,8 @@ describe("ReasoningWorkspace UI", () => {
 
     // Labels and human-readable text should be present
     expect(html).toContain("Your situation");
-    expect(html).toContain("Current understanding");
-    expect(html).toContain("What we are working out");
-    expect(html).toContain("Next question");
+    expect(html).toContain("What we&#x27;ve established");
+    expect(html).toContain("Current investigation");
     expect(html).toContain("Complaint rate denominator");
 
     // Raw node IDs only appear in developer details (collapsed), not in user-facing sections
@@ -1044,8 +1034,8 @@ describe("ReasoningWorkspace UI", () => {
       <ReasoningWorkspace {...makeWorkspaceProps()} />,
     );
 
-    expect(html).toContain("Reasoning progress");
     expect(html).toContain("Current focus");
+    expect(html).not.toContain("Reasoning progress");
   });
 
   it("active unknown is shown in plain language, not raw IDs", () => {
@@ -1061,7 +1051,7 @@ describe("ReasoningWorkspace UI", () => {
     expect(html).toContain("Developer details");
   });
 
-  it("reasoning progress handles zero remaining gracefully", () => {
+  it("progress card handles zero remaining gracefully", () => {
     const html = renderToStaticMarkup(
       <ReasoningWorkspace
         {...makeWorkspaceProps({
@@ -1075,7 +1065,7 @@ describe("ReasoningWorkspace UI", () => {
       />,
     );
 
-    expect(html).toContain("Reasoning progress");
+    expect(html).toContain("All areas under investigation are now complete");
   });
 
   it("loading card appears immediately with spinner and heading", () => {
@@ -1099,7 +1089,7 @@ describe("ReasoningWorkspace UI", () => {
       <ReasoningWorkspace {...makeWorkspaceProps()} />,
     );
 
-    expect(html).toContain("Your answer");
+    expect(html).toContain("Your response");
     expect(html).toContain("Update situation");
   });
 
@@ -1159,23 +1149,7 @@ describe("ReasoningWorkspace UI", () => {
       />,
     );
 
-    expect(html).toContain("There is no next question at the moment.");
-  });
-
-  it("initial loading state appears with spinner heading", () => {
-    const html = renderToStaticMarkup(
-      <ReasoningWorkspace
-        status="loading"
-        updateStatus="idle"
-        result={null}
-        answer=""
-        setAnswer={vi.fn()}
-        onAnswerSubmit={vi.fn()}
-      />,
-    );
-
-    expect(html).toContain("Working through your situation");
-    expect(html).toContain("Reading your situation");
+    expect(html).toContain("fully investigated");
   });
 
   it("update loading state appears with spinner heading", () => {
@@ -1222,7 +1196,7 @@ describe("ReasoningWorkspace UI", () => {
 
     // Should not show any result panels or workspace
     expect(html).not.toContain("Your situation");
-    expect(html).not.toContain("Next question");
+    expect(html).not.toContain("Current investigation");
   });
 
   it("update error is visible", () => {
@@ -1263,7 +1237,7 @@ describe("ReasoningWorkspace UI", () => {
       />,
     );
 
-    expect(html).not.toContain("Your answer");
+    expect(html).not.toContain("Your response");
     expect(html).not.toContain("Update situation");
   });
 
@@ -1487,7 +1461,7 @@ describe("ReasoningWorkspace UI", () => {
     );
 
     expect(html).not.toContain("Working through your situation");
-    expect(html).toContain("Next question");
+    expect(html).toContain("Current investigation");
     expect(html).toContain("Update situation");
   });
 
@@ -1542,4 +1516,41 @@ describe("ReasoningWorkspace UI", () => {
     // No form controls remain during loading
     expect(html).not.toContain("Update situation");
   });
+
+  it("investigation complete message shows confident language when satisfied", () => {
+    const html = renderToStaticMarkup(
+      <ReasoningWorkspace
+        status="success"
+        updateStatus="idle"
+        result={makeWorkspaceResult({
+          selectedQuestion: null,
+          diagnostics: { ...makeWorkspaceResult().diagnostics, noQuestionReason: "All unknowns satisfied" },
+        })}
+        answer=""
+        setAnswer={vi.fn()}
+        onAnswerSubmit={vi.fn()}
+      />,
+    );
+
+    expect(html).toContain("fully investigated");
+    expect(html).not.toContain("There is no next question at the moment");
+  });
+
+  it("investigation complete shows confidence-building fallback", () => {
+    const html = renderToStaticMarkup(
+      <ReasoningWorkspace
+        status="success"
+        updateStatus="idle"
+        result={makeWorkspaceResult({
+          selectedQuestion: null,
+          diagnostics: { ...makeWorkspaceResult().diagnostics, noQuestionReason: null },
+        })}
+        answer=""
+        setAnswer={vi.fn()}
+        onAnswerSubmit={vi.fn()}
+      />,
+    );
+
+    expect(html).toContain("We have established enough for now");
+  });
 });