chore: add backlog.md + gitignore config/.backup-* dirs

.gitignore

@@ -19,3 +19,4 @@ unsloth_compiled_cache/
 data/survey_screenshots/*
 !data/survey_screenshots/.gitkeep
 config/user.yaml
+config/.backup-*

docs/backlog.md

@@ -0,0 +1,23 @@
+# Peregrine — Feature Backlog
+
+Unscheduled ideas and deferred features. Roughly grouped by area.
+
+---
+
+## Settings / Data Management
+
+- **Backup / Restore / Teleport** — Settings panel option to export a full config snapshot (user.yaml + all gitignored configs) as a zip, restore from a snapshot, and "teleport" (export + import to a new machine or Docker volume). Useful for migrations, multi-machine setups, and safe wizard testing.
+
+---
+
+## Apply / Browser Integration
+
+- **Browser autofill extension** — Chrome/Firefox extension that reads job application forms and auto-fills from the user's profile + generated cover letter; syncs submitted applications back into the pipeline automatically. (Phase 2 paid+ feature per business plan.)
+
+---
+
+## Email Sync
+
+See also: `docs/plans/email-sync-testing-checklist.md` for outstanding test coverage items.
+
+---