Persist neovim plugin/Mason data across container recreations

Mason LSP installs and Lazy plugin cache live at ~/.local/share/nvim,
which was in the container's writable layer. Every --force-recreate
triggered a full re-download of all plugins and LSP servers on next
nvim launch — slow and wasteful.

Add devbox-nvim-data named volume in docker-compose.yml and
docker-compose.shared.yml, add to entrypoint ownership-fix loop,
update persistence tables in README.md and DOCKER_HUB.md.

DOCKER_HUB.md

@@ -229,6 +229,7 @@ Understanding what survives container restarts and what doesn't:
 | `/home/developer/.local/state/opencode` | Named volume (if configured) | ✅ Yes — Docker volume | TUI settings (theme, toggles) |
 | `/home/developer/.cache/bash` | Named volume `devbox-shell-history` | ✅ Yes — Docker volume | Bash history (`$HISTFILE`) — survives container recreate |
 | `/home/developer/.local/share/zoxide` | Named volume `devbox-zoxide` | ✅ Yes — Docker volume | Zoxide directory history (`z <fragment>` jump targets) |
+| `/home/developer/.local/share/nvim` | Named volume `devbox-nvim-data` | ✅ Yes — Docker volume | Neovim plugins, Mason LSP installs, Lazy plugin cache |
 | `/home/developer/.local/share/uv` | Named volume (if configured) | ✅ Yes — Docker volume | Python installs, uv tool installs |
 | `/home/developer/.rustup` | Named volume (if configured) | ✅ Yes — Docker volume | Rust toolchains |
 | `/home/developer/.cargo` | Named volume (if configured) | ✅ Yes — Docker volume | Cargo binaries, registry cache |

README.md

@@ -549,6 +549,7 @@ Container (Debian trixie)
 | `/home/developer/.local/state/opencode` | Named volume `devbox-state` | ✅ Yes | TUI settings (theme, toggles) |
 | `/home/developer/.cache/bash` | Named volume `devbox-shell-history` | ✅ Yes | Bash history (`$HISTFILE`), survives container recreate |
 | `/home/developer/.local/share/zoxide` | Named volume `devbox-zoxide` | ✅ Yes | Zoxide directory history (`z <fragment>` jump targets) |
+| `/home/developer/.local/share/nvim` | Named volume `devbox-nvim-data` | ✅ Yes | Neovim plugins, Mason LSP installs, Lazy plugin cache |
 | `/home/developer/.local/share/uv` | Named volume `devbox-uv` (if configured) | ✅ Yes | Python installs, uv tool installs |
 | `/home/developer/.rustup` | Named volume `devbox-rustup` (if configured) | ✅ Yes | Rust toolchains |
 | `/home/developer/.cargo` | Named volume `devbox-cargo` (if configured) | ✅ Yes | Cargo binaries, registry cache |

docker-compose.shared.yml

@@ -55,6 +55,9 @@ services:
       # Persist zoxide directory history ('z <fragment>' to jump)
       - devbox-zoxide:/home/developer/.local/share/zoxide
 
+      # Persist neovim plugin/Mason data (avoids re-downloading on every recreate)
+      - devbox-nvim-data:/home/developer/.local/share/nvim
+
       # Persist uv data (Python installs)
       - devbox-uv:/home/developer/.local/share/uv
 
@@ -65,4 +68,5 @@ volumes:
   devbox-data:
   devbox-shell-history:
   devbox-zoxide:
+  devbox-nvim-data:
   devbox-uv:

docker-compose.yml

@@ -89,6 +89,9 @@ services:
       # Optional: persist VS Code server and extensions across container recreations
       # - devbox-vscode:/home/developer/.vscode-server
 
+      # Persist neovim plugin/Mason data (avoids re-downloading on every recreate)
+      - devbox-nvim-data:/home/developer/.local/share/nvim
+
       # Optional: AWS credentials/SSO config (not read-only — SSO writes token cache)
       # - ~/.aws:/home/developer/.aws
 
@@ -97,6 +100,7 @@ volumes:
   devbox-state:
   devbox-shell-history:
   devbox-zoxide:
+  devbox-nvim-data:
   devbox-uv:
   # devbox-rustup:
   # devbox-cargo:

entrypoint.sh

@@ -78,6 +78,7 @@ for dir in \
   /home/"$USER_NAME"/.local/state/opencode \
   /home/"$USER_NAME"/.local/share/uv \
   /home/"$USER_NAME"/.local/share/zoxide \
+  /home/"$USER_NAME"/.local/share/nvim \
   /home/"$USER_NAME"/.cache/bash \
   /home/"$USER_NAME"/.rustup \
   /home/"$USER_NAME"/.cargo \