chore: update opencode workflow and local config

.memory/plans/tmux-shift-enter-fix.md

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+---
+title: tmux-shift-enter-fix
+type: plan
+permalink: dotfiles/plans/tmux-shift-enter-fix
+tags:
+- tmux
+- terminal
+- keybindings
+---
+
+# tmux Shift+Enter Fix
+
+## Goal
+Inside tmux, pressing Shift+Enter should insert a literal newline instead of submitting the command line.
+
+## Decision
+- [decision] Preserve tmux extended-keys support and apply the smallest possible fix at the tmux layer.
+- [decision] Use `bind-key -n S-Enter send-keys "\n"` in `~/.tmux.conf` instead of disabling `extended-keys` or adding shell-specific bindings.
+
+## Tasks
+- [ ] Add a tmux root-table binding for `S-Enter`
+- [ ] Verify tmux loads the config and exposes the expected binding
+- [ ] Check documentation coverage for this config tweak
+
+## Acceptance criteria
+- `~/.tmux.conf` contains an explicit `S-Enter` binding that sends a newline.
+- Existing `extended-keys` settings remain enabled.
+- After sourcing the config, tmux shows the `S-Enter` root binding.
+
+## Workstream
+- Single workstream in the main repo working tree.
+
+## Findings tracker
+- None.
+
+## Relations
+- related_to [[knowledge]]