feat: resolve current jj working-copy conflicts

Add a dedicated native resolver workspace with all side/base inputs,
shared editable Results, region choices, retained per-file status,
responsive rendering, and explicit nontext file choices.

Guard writes with jj working-copy locking, frozen checkout identity,
exact disk baselines, native dirty-buffer protection, and asynchronous
jj snapshot/status confirmation. Historical comparisons remain readonly.

Verified all 916 tests and live isolated terminal workflows covering text
regions, narrow layouts, binary bytes and symlink targets/types.
Clippy completes with pre-existing warnings only.

Size exception: 2614 implementation additions/deletions excluding tests
and docs. Native workspace integration, explicit file choices and the
safe save/check operation are retained as one complete behavioral slice.

src/main.rs

@@ -83,6 +83,11 @@ Diff: :diff (Normal); choose Before then After; Working checkout After edits liv
       Changed files: normal picker/explorer bindings, Ctrl+w close; A/M/D/R status and rename paths
 Pull requests: :pull_requests [REMOTE]; GitHub/GitLab/Gitea Open/Closed/All tabs, type to search
       Enter opens the immutable PR head against its merge base; API auth uses provider tokens or gh/glab
+Resolve jj conflicts: :resolve opens the current working-copy conflicts in a dedicated workspace
+      Native readonly inputs above editable Result; Tab focus, :resolve.source N / :resolve.base N
+      :resolve.next/previous navigates regions; :resolve.use_source [N] chooses one region
+      :w saves and checks jj status; :resolve.next_file/previous_file switches files
+      :resolve.files focuses the list; :resolve.result focuses Result; :resolve.close closes cleanly
 
 Ruby config: $XDG_CONFIG_HOME/vamp/config.rb or ~/.config/vamp/config.rb
 Set VAMP_RUBY to choose the Ruby executable.