v8.6.0

Commit 57c127f — refactor: runtime core
Eliminated prompt store blocking disk fallback path. Guide loader fully asyncified. Implemented memory relevance-based recall mechanism. Streamlined concept taxonomy to reduce cognitive overhead and improve lookup efficiency.

Commit c30fce4 — fix: tooling layer
Removed erroneous expose filter from automation/script list endpoint — this was the root cause of empty list returns. Deprecated HAControl.navigate from description schema to prevent misuse. Hardened PluginManager against hallucinated tool invocations.

Commit c908575 — fix: frontend lifecycle
Fixed _turnEnded to properly gate tool activity panel lifecycle, eliminating flickering pseudo-elements. Added guard to respect user-initiated manual toggles and prevent state overwrites.

Commit d5cf9c0 — docs: HA runtime guide
Full rewrite of the HA runtime guide. Added comprehensive plugin_system documentation covering architecture, registration flow, and extension points.

Commit 54392f1 — chore: command infrastructure
Updated chat commands, command registry definitions, plugin manifests, and runtime constants to reflect latest API contracts.

Full Changelog: v8.5.0...v8.6.0