feat(shell): complete browser-history destinations through configured key bindings #46

Parent

Part of #43. Depends on #44 and the browser-style history stack in #36.

Summary

Implement the dependency-free cj key-binding behavior using the generated integration's shell-local browser history.

Interaction

• invoking the configured chord completes the buffer with a remembered directory without changing directory immediately
• repeated invocation can move through older history entries while keeping the edit reversible
• pressing Enter executes the completed command through the normal shell path

Acceptance criteria

• consume the bounded shell-local history owned by feat(v1): replace downward route with browser-style directory history #36; do not persist or reconstruct it in a cj subprocess
• preserve the original buffer and current directory until Enter
• safely quote all supported paths
• an empty history source advances to the next configured behavior, or shows a clear no-history message when cj is the only behavior
• cancellation or abandoning the edited line does not consume history
• completing a path does not itself mutate the ^/v stack
• behavior is consistent with the browser-style navigation semantics across supported shells
• tests cover empty, single-entry, multi-entry, repeated-invocation, cancellation, and special-character paths

Delivery

Implemented in #56 and released in 0.4.0 as part of #43.