fix(agent-presets): register the display subpath in tsconfig paths

CI's coverage lane runs on a clean tree where workspace imports resolve
through tsconfig paths to src; the value import of
@deepseek-ai/dsh-agent-presets/display therefore needs its own paths row
beside ./types. Locally the built lib masked the gap; reproduced by moving
lib aside, fixed, and re-run green under the same condition.

tsconfig.base.json

@@ -83,6 +83,7 @@
       "@deepseek-ai/dsh-plan-mode/types": ["./packages/plan/plan-mode/src/types.ts"],
       "@deepseek-ai/dsh-plan-mode/client": ["./packages/plan/plan-mode/src/client.ts"],
       "@deepseek-ai/dsh-agent-presets/types": ["./packages/preset/agent-presets/src/types.ts"],
+      "@deepseek-ai/dsh-agent-presets/display": ["./packages/preset/agent-presets/src/display.ts"],
       "@deepseek-ai/dsh-pwsh-local": ["./packages/shell/pwsh-local/src/index.ts"],
       "@deepseek-ai/dsh-tool-pwsh": ["./packages/shell/tool-pwsh/src/index.ts"],
       "@deepseek-ai/dsh-shell-env": ["./packages/shell/shell-env/src/index.ts"],