Add neovim 0.12, bat, eza, zoxide, tmux, htop to base image

Replace vim-tiny with neovim from GitHub releases (pinned, multi-arch).
Add bat, eza, zoxide from GitHub releases and tmux, htop, patch from apt.
Move tmux from OMOS-only to base image. Set EDITOR=nvim.
Add neovim config mount option to docker-compose and docs.

README.md

@@ -127,6 +127,15 @@ volumes:
   - ~/.agents/skills:/home/developer/.agents/skills:ro
 ```
 
+### Neovim configuration
+
+The image includes neovim 0.12 with `EDITOR=nvim` set by default. To use your own neovim config (and have plugins auto-install via lazy.nvim on first start), mount it from the host:
+
+```yaml
+volumes:
+  - ~/.config/nvim:/home/developer/.config/nvim:ro
+```
+
 ### Rebuilding the Image
 
 `docker compose run` and `docker compose up` use the existing image — they **do not rebuild** when you change the Dockerfile or build args (e.g. updating `OPENCODE_VERSION`). Rebuild explicitly:
@@ -153,7 +162,7 @@ docker compose build --build-arg OPENCODE_VERSION=1.5.0
 |---|---|---|
 | `INSTALL_PYTHON` | `false` | Python 3 + pip + venv |
 | `INSTALL_GO` | `false` | Go toolchain |
-| `INSTALL_OMOS` | `false` | [oh-my-opencode-slim](https://github.com/alvinunreal/oh-my-opencode-slim) multi-agent orchestration (installs Bun, tmux, and plugin) |
+| `INSTALL_OMOS` | `false` | [oh-my-opencode-slim](https://github.com/alvinunreal/oh-my-opencode-slim) multi-agent orchestration (installs Bun and plugin) |
 | `OMOS_VERSION` | `latest` | Pin a specific oh-my-opencode-slim version |
 
 ## oh-my-opencode-slim (Multi-Agent Orchestration)
@@ -170,7 +179,7 @@ A pre-built OMOS image is available on Docker Hub as `joakimp/opencode-devbox:la
 docker compose build --build-arg INSTALL_OMOS=true
 ```
 
-This installs Bun, tmux, and the oh-my-opencode-slim package into the image.
+This installs Bun and the oh-my-opencode-slim package into the image.
 
 **2. Enable in `.env`:**
 
@@ -191,7 +200,7 @@ On first start, the entrypoint runs the oh-my-opencode-slim installer in non-int
 | Variable | Default | Description |
 |---|---|---|
 | `ENABLE_OMOS` | `false` | Activate oh-my-opencode-slim on container start |
-| `OMOS_TMUX` | `false` | Enable tmux pane integration (tmux is included with `INSTALL_OMOS`) |
+| `OMOS_TMUX` | `false` | Enable tmux pane integration (tmux is included in the base image) |
 | `OMOS_SKILLS` | `true` | Install recommended skills (simplify, agent-browser, cartography) |
 | `OMOS_RESET` | `false` | Force regenerate config on next start (backs up existing config) |
 
@@ -303,12 +312,12 @@ Host Machine
 
 Container (Debian bookworm)
 ├── opencode binary
-├── oh-my-opencode-slim (optional — multi-agent orchestration plugin, includes Bun + tmux)
+├── oh-my-opencode-slim (optional — multi-agent orchestration plugin, includes Bun)
 ├── AWS CLI v2 (SSO + Bedrock auth)
-├── git, ssh, ripgrep, fd, jq, curl, fzf
+├── neovim 0.12, tmux, htop, bat, eza, zoxide
+├── git, ssh, ripgrep, fd, fzf, jq, curl, tree
 ├── Node.js (for MCP servers)
 ├── Bun (optional — included with oh-my-opencode-slim)
-├── tmux (optional — included with oh-my-opencode-slim, also useful independently)
 ├── entrypoint.sh (UID adjustment, git config, provider setup)
 └── /workspace ← your code lives here
 ```