feat: subagent handling, a11y, and docs

feat(subagent): improve tool block UI, panel toggle, and fix glob permission hang

feat(tool-renderers): auto-collapse when completed, show description in bash summary

docs(plan): add model/provider config (free vs OpenRouter) and OpenWork settings reference

docs: link runtime and user-env docs in AGENTS and README

docs(runtime): add bundling design and user env doc, mark Node/Git/Python not bundled

docs(plan): sync PLAN with completed Skills features

feat(skills): improve install console output and toast behavior

feat(skills): use filesystem as single source of truth for installed list

fix(skills): update installed list without reload and add open-folder for new install

feat(skills): add run output context and install output dialog

feat(skills): non-blocking backend and Redux-based refresh

feat(home): add hint above message input on new session page

style(ui): add cursor-pointer to button and tabs trigger

fix(ui): disable autocorrect and autocomplete on inputs