fix(paths): respect OPENCLAW_HOME for all internal path resolution (#12091)

* fix(paths): respect OPENCLAW_HOME for all internal path resolution (#11995)

Add home-dir module (src/infra/home-dir.ts) that centralizes home
directory resolution with precedence: OPENCLAW_HOME > HOME > USERPROFILE > os.homedir().

Migrate all path-sensitive callsites: config IO, agent dirs, session
transcripts, pairing store, cron store, doctor, CLI profiles.

Add envHomedir() helper in config/paths.ts to reduce lambda noise.
Document OPENCLAW_HOME in docs/help/environment.md.

* fix(paths): handle OPENCLAW_HOME '~' fallback (#12091) (thanks @sebslight)

* docs: mention OPENCLAW_HOME in install and getting started (#12091) (thanks @sebslight)

* fix(status): show OPENCLAW_HOME in shortened paths (#12091) (thanks @sebslight)

* docs(changelog): clarify OPENCLAW_HOME and HOME precedence (#12091) (thanks @sebslight)

src/infra/home-dir.test.ts

@@ -0,0 +1,64 @@
+import { describe, expect, it } from "vitest";
+import { expandHomePrefix, resolveEffectiveHomeDir, resolveRequiredHomeDir } from "./home-dir.js";
+
+describe("resolveEffectiveHomeDir", () => {
+  it("prefers OPENCLAW_HOME over HOME and USERPROFILE", () => {
+    const env = {
+      OPENCLAW_HOME: "/srv/openclaw-home",
+      HOME: "/home/other",
+      USERPROFILE: "C:/Users/other",
+    } as NodeJS.ProcessEnv;
+
+    expect(resolveEffectiveHomeDir(env, () => "/fallback")).toBe("/srv/openclaw-home");
+  });
+
+  it("falls back to HOME then USERPROFILE then homedir", () => {
+    expect(resolveEffectiveHomeDir({ HOME: "/home/alice" } as NodeJS.ProcessEnv)).toBe(
+      "/home/alice",
+    );
+    expect(resolveEffectiveHomeDir({ USERPROFILE: "C:/Users/alice" } as NodeJS.ProcessEnv)).toBe(
+      "C:/Users/alice",
+    );
+    expect(resolveEffectiveHomeDir({} as NodeJS.ProcessEnv, () => "/fallback")).toBe("/fallback");
+  });
+
+  it("expands OPENCLAW_HOME when set to ~", () => {
+    const env = {
+      OPENCLAW_HOME: "~/svc",
+      HOME: "/home/alice",
+    } as NodeJS.ProcessEnv;
+
+    expect(resolveEffectiveHomeDir(env)).toBe("/home/alice/svc");
+  });
+});
+
+describe("resolveRequiredHomeDir", () => {
+  it("returns cwd when no home source is available", () => {
+    expect(
+      resolveRequiredHomeDir({} as NodeJS.ProcessEnv, () => {
+        throw new Error("no home");
+      }),
+    ).toBe(process.cwd());
+  });
+
+  it("returns cwd when OPENCLAW_HOME is tilde-only and no fallback home exists", () => {
+    expect(
+      resolveRequiredHomeDir({ OPENCLAW_HOME: "~" } as NodeJS.ProcessEnv, () => {
+        throw new Error("no home");
+      }),
+    ).toBe(process.cwd());
+  });
+});
+
+describe("expandHomePrefix", () => {
+  it("expands tilde using effective home", () => {
+    const value = expandHomePrefix("~/x", {
+      env: { OPENCLAW_HOME: "/srv/openclaw-home" } as NodeJS.ProcessEnv,
+    });
+    expect(value).toBe("/srv/openclaw-home/x");
+  });
+
+  it("keeps non-tilde values unchanged", () => {
+    expect(expandHomePrefix("/tmp/x")).toBe("/tmp/x");
+  });
+});