fix: complete the docs/→design/ and openapi→api/ rename references

The file moves (docs/ → design/, docs/api/openapi.json → api/openapi.json) landed
in d01a8fd, but the matching reference updates did not — so mgmt.rs's drift-test
`include_str!("../../../docs/api/openapi.json")` pointed at a path that no longer
exists and the host failed to build. This restores it and updates every reference:

  - mgmt.rs include_str! → ../../../api/openapi.json (fixes the build)
  - web/orval.config.ts codegen target, web/Dockerfile, .dockerignore
  - deb/rpm/Arch packaging install paths
  - CLAUDE.md, the .gitea CI workflows, code doc-comments, design-doc cross-links

docs-site route URLs (/docs/...) untouched.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

packaging/windows/drivers/pf-vdisplay/src/control.rs

@@ -27,7 +27,7 @@ static WATCHDOG_STARTED: AtomicBool = AtomicBool::new(false);
 /// without a cooperative REMOVE (crash / `TerminateProcess`) left its virtual monitor + swap-chain
 /// worker + pooled D3D device wedged in WUDFHost until the next host start's CLEAR_ALL, and a
 /// not-restarted host left the orphan monitor in the desktop topology indefinitely
-/// (`docs/windows-host-rewrite.md` §2.8). This thread closes that: if no IOCTL arrives for
+/// (`design/windows-host-rewrite.md` §2.8). This thread closes that: if no IOCTL arrives for
 /// `WATCHDOG_TIMEOUT_S` while monitors exist, it departs them all.
 ///
 /// (A WDF `EvtFileClose` on the control handle would be more immediate — the plan's preferred §3.4