feat(live): make live sessions recoverable (#125)

* feat(live): make live sessions recoverable

tired of live mode losing the plot when the browser moved faster than the agent.
now the state is boring: journal it, resume it, finish it.

---
- add durable live-session journal, checkpoint events, and status/resume/complete commands
- split browser session storage into a testable helper and harden accept/discard completion
- fix Astro live CSS preview mode and add recovery/live E2E coverage
- declare Bun as the package manager and add a Bun-native audit script

* fix(live): acknowledge fallback recovery states

* fix(live): flush recoverable handoffs promptly

* fix(live): keep recovery handoffs accurate

* fix(live): preserve poll reply metadata

* fix(live): treat event HTTP failures as failed sends

* fix(live): acknowledge manual completion through helper

* Add .impeccable project state paths

* Fix live disconnect recovery phase

* Refine live CSS authoring contract

* Test live CSS authoring guidance

* Harden live LLM E2E recovery

* Fix live recovery review issues

---------

Co-authored-by: Paul Bakaus <paulbakaus@pauls-mbp-3.lan>

scripts/build.js

@@ -744,7 +744,7 @@ async function build() {
     const skillsDest = path.join(ROOT_DIR, configDir, 'skills');
 
     if (fs.existsSync(skillsSrc)) {
-      // Preserve per-project script artifacts (e.g. live-mode config.json)
+      // Preserve legacy per-project script artifacts (e.g. live-mode config.json)
       // across the rm + recopy. The build intentionally doesn't ship them,
       // so without this the sync destroys local state on every rebuild.
       const stashed = stashPerProjectArtifacts(skillsDest);