move pi-mono into companion-cloud as apps/companion-os

- Copy all pi-mono source into apps/companion-os/
- Update Dockerfile to COPY pre-built binary instead of downloading from GitHub Releases
- Update deploy-staging.yml to build pi from source (bun compile) before Docker build
- Add apps/companion-os/** to path triggers
- No more cross-repo dispatch needed

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

packages/coding-agent/test/footer-width.test.ts

@@ -0,0 +1,114 @@
+import { visibleWidth } from "@mariozechner/pi-tui";
+import { beforeAll, describe, expect, it } from "vitest";
+import type { AgentSession } from "../src/core/agent-session.js";
+import type { ReadonlyFooterDataProvider } from "../src/core/footer-data-provider.js";
+import { FooterComponent } from "../src/modes/interactive/components/footer.js";
+import { initTheme } from "../src/modes/interactive/theme/theme.js";
+
+type AssistantUsage = {
+  input: number;
+  output: number;
+  cacheRead: number;
+  cacheWrite: number;
+  cost: { total: number };
+};
+
+function createSession(options: {
+  sessionName: string;
+  modelId?: string;
+  provider?: string;
+  reasoning?: boolean;
+  thinkingLevel?: string;
+  usage?: AssistantUsage;
+}): AgentSession {
+  const usage = options.usage;
+  const entries =
+    usage === undefined
+      ? []
+      : [
+          {
+            type: "message",
+            message: {
+              role: "assistant",
+              usage,
+            },
+          },
+        ];
+
+  const session = {
+    state: {
+      model: {
+        id: options.modelId ?? "test-model",
+        provider: options.provider ?? "test",
+        contextWindow: 200_000,
+        reasoning: options.reasoning ?? false,
+      },
+      thinkingLevel: options.thinkingLevel ?? "off",
+    },
+    sessionManager: {
+      getEntries: () => entries,
+      getSessionName: () => options.sessionName,
+    },
+    getContextUsage: () => ({ contextWindow: 200_000, percent: 12.3 }),
+    modelRegistry: {
+      isUsingOAuth: () => false,
+    },
+  };
+
+  return session as unknown as AgentSession;
+}
+
+function createFooterData(providerCount: number): ReadonlyFooterDataProvider {
+  const provider = {
+    getGitBranch: () => "main",
+    getExtensionStatuses: () => new Map<string, string>(),
+    getAvailableProviderCount: () => providerCount,
+    onBranchChange: (callback: () => void) => {
+      void callback;
+      return () => {};
+    },
+  };
+
+  return provider;
+}
+
+describe("FooterComponent width handling", () => {
+  beforeAll(() => {
+    initTheme(undefined, false);
+  });
+
+  it("keeps all lines within width for wide session names", () => {
+    const width = 93;
+    const session = createSession({ sessionName: "한글".repeat(30) });
+    const footer = new FooterComponent(session, createFooterData(1));
+
+    const lines = footer.render(width);
+    for (const line of lines) {
+      expect(visibleWidth(line)).toBeLessThanOrEqual(width);
+    }
+  });
+
+  it("keeps stats line within width for wide model and provider names", () => {
+    const width = 60;
+    const session = createSession({
+      sessionName: "",
+      modelId: "模".repeat(30),
+      provider: "공급자",
+      reasoning: true,
+      thinkingLevel: "high",
+      usage: {
+        input: 12_345,
+        output: 6_789,
+        cacheRead: 0,
+        cacheWrite: 0,
+        cost: { total: 1.234 },
+      },
+    });
+    const footer = new FooterComponent(session, createFooterData(2));
+
+    const lines = footer.render(width);
+    for (const line of lines) {
+      expect(visibleWidth(line)).toBeLessThanOrEqual(width);
+    }
+  });
+});