refactor(paths): collapse harness home resolution into one resolver

Delete @deepseek-ai/dsh-home and make dsh-paths the sole owner of the
single-root harness home ($DSH_HOME || ~/.dsh). Migrate tool-bash,
skill-local, and agent-spine-demo off dsh-home, and fold telemetry's
divergent globalConfigDir onto the shared resolver, dropping its second
XDG/APPDATA policy and the deepseek-harness namespace so the anonymous
id lives under the harness home. Add dshHomeDisplay() for symbolic
user-facing paths, replacing workspace-context's bespoke check.

packages/bash/tool-bash/src/index.ts

@@ -23,7 +23,7 @@ import { ESCALATION_TARGETS, approveEscalation, validateEscalationArgs } from '@
 import { effectiveSandboxMode } from '@deepseek-ai/dsh-sandbox-policy'
 import { DSH_ENV_PREFIX } from '@deepseek-ai/dsh-bash'
 import type { DshEnvironment, DshEnvironmentKey } from '@deepseek-ai/dsh-bash'
-import { DSH_HOME_ENV, resolveDshHome } from '@deepseek-ai/dsh-home'
+import { DSH_HOME_ENV, resolveDshHome } from '@deepseek-ai/dsh-paths'
 import { processOutcome } from './background.ts'
 import { parseExitStatus, renderProcessRead, renderResult } from './render.ts'