fix: preserve minimised warnings across session navigation

.changeset/quiet-session-warnings.md

@@ -2,4 +2,4 @@
 "@jmfederico/pi-web": patch
 ---
 
-Let users minimise session warnings into an accessible status-bar count, and replace warning emoji with SVG icons.
+Let users minimise session warnings into an accessible status-bar count that stays minimised when they revisit the session, and replace warning emoji with SVG icons.

src/client/src/components/PiWebApp.ts

@@ -22,6 +22,7 @@ import { SessionStorageTerminalSelectionMemory } from "../controllers/terminalSe
 import { SessionStorageWorkspaceSelectionMemory } from "../controllers/workspaceSelection";
 import { KeyboardShortcutDispatcher } from "../keyboardShortcuts";
 import { selectedMachineId } from "../controllers/types";
+import { machineSessionKey } from "../machineKeys";
 import { sessionCleanupRequestKey, sessionCleanupUnavailableMessage } from "../sessionCleanupUi";
 import { selectedNotificationView } from "../sessionNotifications";
 import { hasAuthoritativeSessionPersistence as runtimeHasAuthoritativeSessionPersistence } from "../sessionPersistence";
@@ -255,10 +256,11 @@ export class PiWebApp extends LitElement {
   }
 
   private syncSessionWarningVisibility(): void {
+    const session = this.state.selectedSession;
     this.sessionWarningVisibility = reconcileSessionWarningVisibility(
       this.sessionWarningVisibility,
-      this.state.selectedSession?.id,
-      this.state.status?.warnings,
+      session === undefined ? undefined : machineSessionKey(selectedMachineId(this.state), session.id),
+      this.state.status === undefined ? undefined : this.state.status.warnings ?? [],
     );
   }
 

src/client/src/components/PiWebApp.warningVisibility.test.ts

@@ -26,11 +26,26 @@ describe("PiWebApp session-warning visibility wiring", () => {
     collapse();
 
     const collapsedChat = renderChatView(app, state);
-    const collapsedStatusBar = renderStatusBar(app, state);
     expect(templateValueAfterMarker(collapsedChat, ".warningsVisible=")).toBe(false);
-    expect(templateValueAfterMarker(collapsedStatusBar, ".collapsedWarningCount=")).toBe(2);
+    expect(templateValueAfterMarker(renderStatusBar(app, state), ".collapsedWarningCount=")).toBe(2);
 
-    const restore = templateCallbackAfterMarker(collapsedStatusBar, ".onRestoreWarnings=");
+    const otherState = stateWithWarnings("session-2");
+    setAppState(app, otherState);
+    syncWarningVisibility(app);
+    expect(templateValueAfterMarker(renderChatView(app, otherState), ".warningsVisible=")).toBe(true);
+
+    const returningState = { ...state, status: undefined };
+    setAppState(app, returningState);
+    syncWarningVisibility(app);
+    expect(templateValueAfterMarker(renderChatView(app, returningState), ".warningsVisible=")).toBe(true);
+
+    setAppState(app, state);
+    syncWarningVisibility(app);
+    const returnedStatusBar = renderStatusBar(app, state);
+    expect(templateValueAfterMarker(renderChatView(app, state), ".warningsVisible=")).toBe(false);
+    expect(templateValueAfterMarker(returnedStatusBar, ".collapsedWarningCount=")).toBe(2);
+
+    const restore = templateCallbackAfterMarker(returnedStatusBar, ".onRestoreWarnings=");
     restore();
 
     expect(templateValueAfterMarker(renderChatView(app, state), ".warningsVisible=")).toBe(true);
@@ -53,11 +68,11 @@ function createApp(): PiWebApp {
   return new PiWebApp();
 }
 
-function stateWithWarnings(): AppState {
+function stateWithWarnings(sessionId = "session-1"): AppState {
   const selectedSession: SessionInfo = {
-    id: "session-1",
+    id: sessionId,
     cwd: "/repo",
-    path: "/repo/session-1.jsonl",
+    path: `/repo/${sessionId}.jsonl`,
     created: "2026-07-14T00:00:00.000Z",
     modified: "2026-07-14T00:00:00.000Z",
     messageCount: 1,
@@ -66,13 +81,13 @@ function stateWithWarnings(): AppState {
   return {
     ...initialAppState(),
     selectedSession,
-    status: warningStatus(),
+    status: warningStatus(sessionId),
   };
 }
 
-function warningStatus(): SessionStatus {
+function warningStatus(sessionId: string): SessionStatus {
   return {
-    sessionId: "session-1",
+    sessionId,
     isStreaming: true,
     isCompacting: false,
     isBashRunning: false,

src/client/src/sessionWarningVisibility.test.ts

@@ -46,32 +46,53 @@ describe("session warning visibility transitions", () => {
     expect(reconcileSessionWarningVisibility(collapsed, "session-1", replacement)).toBe(collapsed);
   });
 
-  it("reopens for changed warnings and when the same warnings return after clearing", () => {
+  it("retains collapse while status is unavailable but reopens after a known warning change", () => {
     const visible = reconcileSessionWarningVisibility(initialSessionWarningVisibilityState(), "session-1", warnings);
     const collapsed = collapseSessionWarnings(visible);
+    const unavailable = reconcileSessionWarningVisibility(collapsed, "session-1", undefined);
+    const refreshed = reconcileSessionWarningVisibility(unavailable, "session-1", warnings);
     const changed = reconcileSessionWarningVisibility(collapsed, "session-1", [{ ...subscriptionWarning, message: "changed" }, skillWarning]);
     const cleared = reconcileSessionWarningVisibility(collapsed, "session-1", []);
     const returned = reconcileSessionWarningVisibility(cleared, "session-1", warnings);
 
+    expect(unavailable.collapsed).toBe(false);
+    expect(refreshed.collapsed).toBe(true);
     expect(changed.collapsed).toBe(false);
     expect(cleared.collapsed).toBe(false);
     expect(returned.collapsed).toBe(false);
   });
 
-  it("reopens when session selection changes even if the warning set is equal", () => {
-    const visible = reconcileSessionWarningVisibility(initialSessionWarningVisibilityState(), "session-1", warnings);
-    const collapsed = collapseSessionWarnings(visible);
+  it("remembers collapse per session while navigating between unchanged warning sets", () => {
+    const firstVisible = reconcileSessionWarningVisibility(initialSessionWarningVisibilityState(), "session-1", warnings);
+    const firstCollapsed = collapseSessionWarnings(firstVisible);
+    const secondVisible = reconcileSessionWarningVisibility(firstCollapsed, "session-2", warnings);
+    const secondCollapsed = collapseSessionWarnings(secondVisible);
+    const returnedToFirst = reconcileSessionWarningVisibility(secondCollapsed, "session-1", warnings.map((warning) => ({ ...warning })));
 
-    expect(reconcileSessionWarningVisibility(collapsed, "session-2", warnings).collapsed).toBe(false);
+    expect(secondVisible.collapsed).toBe(false);
+    expect(returnedToFirst.collapsed).toBe(true);
+    expect(reconcileSessionWarningVisibility(returnedToFirst, "session-2", warnings).collapsed).toBe(true);
   });
 
-  it("only collapses a non-empty warning set and restores it explicitly", () => {
+  it("keeps an explicitly restored warning set visible after navigating away and back", () => {
+    const visible = reconcileSessionWarningVisibility(initialSessionWarningVisibilityState(), "session-1", warnings);
+    const restored = restoreSessionWarnings(collapseSessionWarnings(visible));
+    const away = reconcileSessionWarningVisibility(restored, "session-2", warnings);
+
+    expect(reconcileSessionWarningVisibility(away, "session-1", warnings).collapsed).toBe(false);
+  });
+
+  it("only collapses a selected, non-empty warning set and restores it explicitly", () => {
     const empty = initialSessionWarningVisibilityState();
+    const selectedEmpty = reconcileSessionWarningVisibility(empty, "session-1", []);
     const visible = reconcileSessionWarningVisibility(empty, "session-1", warnings);
     const collapsed = collapseSessionWarnings(visible);
+    const restored = restoreSessionWarnings(collapsed);
 
     expect(collapseSessionWarnings(empty)).toBe(empty);
+    expect(collapseSessionWarnings(selectedEmpty)).toBe(selectedEmpty);
     expect(collapsed.collapsed).toBe(true);
-    expect(restoreSessionWarnings(collapsed)).toEqual({ ...collapsed, collapsed: false });
+    expect(restored.collapsed).toBe(false);
+    expect(restored.collapsedWarningSets.size).toBe(0);
   });
 });

src/client/src/sessionWarningVisibility.ts

@@ -1,18 +1,21 @@
 import type { SessionWarning } from "./api";
 
 export interface SessionWarningVisibilityState {
-  sessionId: string | undefined;
+  selectedSessionKey: string | undefined;
   warningSetSignature: string;
   warningCount: number;
   collapsed: boolean;
+  /** Warning-set signatures the user collapsed, keyed by machine/session identity. */
+  collapsedWarningSets: ReadonlyMap<string, string>;
 }
 
 export function initialSessionWarningVisibilityState(): SessionWarningVisibilityState {
   return {
-    sessionId: undefined,
+    selectedSessionKey: undefined,
     warningSetSignature: sessionWarningSetSignature(undefined),
     warningCount: 0,
     collapsed: false,
+    collapsedWarningSets: new Map(),
   };
 }
 
@@ -30,28 +33,49 @@ export function sessionWarningSetSignature(warnings: readonly SessionWarning[] |
   return JSON.stringify(warningIdentities);
 }
 
-/** Preserve collapse only while both the selected session and warning set are unchanged. */
+/** Preserve collapse per session while reopening whenever that session's warning set changes. */
 export function reconcileSessionWarningVisibility(
   current: SessionWarningVisibilityState,
-  sessionId: string | undefined,
+  sessionKey: string | undefined,
   warnings: readonly SessionWarning[] | undefined,
 ): SessionWarningVisibilityState {
   const warningSetSignature = sessionWarningSetSignature(warnings);
-  if (current.sessionId === sessionId && current.warningSetSignature === warningSetSignature) return current;
+  const warningCount = warnings?.length ?? 0;
+  const warningSetKnown = warnings !== undefined;
+  const collapsedWarningSet = sessionKey === undefined ? undefined : current.collapsedWarningSets.get(sessionKey);
+  let collapsedWarningSets = current.collapsedWarningSets;
+  if (warningSetKnown && sessionKey !== undefined && collapsedWarningSet !== undefined && collapsedWarningSet !== warningSetSignature) {
+    const nextCollapsedWarningSets = new Map(current.collapsedWarningSets);
+    nextCollapsedWarningSets.delete(sessionKey);
+    collapsedWarningSets = nextCollapsedWarningSets;
+  }
+  const collapsed = warningSetKnown && warningCount > 0 && collapsedWarningSet === warningSetSignature;
+  if (
+    current.selectedSessionKey === sessionKey
+    && current.warningSetSignature === warningSetSignature
+    && current.warningCount === warningCount
+    && current.collapsed === collapsed
+    && current.collapsedWarningSets === collapsedWarningSets
+  ) return current;
   return {
-    sessionId,
+    selectedSessionKey: sessionKey,
     warningSetSignature,
-    warningCount: warnings?.length ?? 0,
-    collapsed: false,
+    warningCount,
+    collapsed,
+    collapsedWarningSets,
   };
 }
 
 export function collapseSessionWarnings(current: SessionWarningVisibilityState): SessionWarningVisibilityState {
-  if (current.collapsed || current.warningCount === 0) return current;
-  return { ...current, collapsed: true };
+  if (current.collapsed || current.warningCount === 0 || current.selectedSessionKey === undefined) return current;
+  const collapsedWarningSets = new Map(current.collapsedWarningSets);
+  collapsedWarningSets.set(current.selectedSessionKey, current.warningSetSignature);
+  return { ...current, collapsed: true, collapsedWarningSets };
 }
 
 export function restoreSessionWarnings(current: SessionWarningVisibilityState): SessionWarningVisibilityState {
   if (!current.collapsed) return current;
-  return { ...current, collapsed: false };
+  const collapsedWarningSets = new Map(current.collapsedWarningSets);
+  if (current.selectedSessionKey !== undefined) collapsedWarningSets.delete(current.selectedSessionKey);
+  return { ...current, collapsed: false, collapsedWarningSets };
 }