docs: sync shell/keybinding docs with the rest of the branch

Update the interactive-shell README and keybindings reference for changes
made after the initial docs commit: no scheduled GC (manual only),
NO_TMUX escape hatch, default-terminal tmux-256color + truecolor, the
JetBrainsMono Nerd Font (new Fonts section + iTerm2 caveat), the
UseKeychain IgnoreUnknown guard, and the vim-tmux-navigator (Ctrl-hjkl) +
resurrect save/restore tmux bindings.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

lyrathorpe/home/KEYBINDINGS.md

@@ -133,16 +133,21 @@ Prefix is **`Ctrl`+`b`** (default). Copy mode uses **vi** keys.
 | --- | --- |
 | `Ctrl`+`b` then `v` | Split into left/right panes |
 | `Ctrl`+`b` then `s` | Split into top/bottom panes |
+| `Ctrl`+`h`/`j`/`k`/`l` | Move between panes — and into/out of vim splits — seamlessly (vim-tmux-navigator, no prefix) |
 | `Alt`+`←`/`→`/`↑`/`↓` | Switch pane by direction (no prefix needed) |
 | `Ctrl`+`b` then `[` | Enter copy mode (then vi motions; `Space`/`Enter` to select/copy) |
 | `Ctrl`+`b` then `z` | Zoom / unzoom the focused pane |
 | `Ctrl`+`b` then `c` | New window |
 | `Ctrl`+`b` then `n` / `p` | Next / previous window |
 | `Ctrl`+`b` then `d` | Detach |
+| `Ctrl`+`b` then `Ctrl`+`s` / `Ctrl`+`r` | Save / restore the session (resurrect; continuum also auto-saves and restores on start) |
 | Mouse | Enabled — click to focus, drag borders, scroll, select |
 
 > The stock split keys `%` and `"` are unbound; use `v` / `s` above. `Ctrl`+`b`
 > then `s` is therefore a split, not the session tree.
+>
+> Sessions persist across reboots (resurrect + continuum). Terminals auto-start
+> tmux; `NO_TMUX=1 <terminal>` opens a bare shell instead.
 
 ---
 

lyrathorpe/home/README.md

@@ -44,7 +44,7 @@ on top (work email, its own ssh config, extra packages).
 | `bat` | syntax-highlighting pager; behaves like `cat` when piped |
 | `nix-index` | `command-not-found`: an unknown command tells you which Nix package provides it (prebuilt DB, no manual indexing) |
 | `comma` (`,`) | run an uninstalled program once: `, cowsay hi` |
-| `nh` | nicer `nixos-rebuild`/`home-manager` with diffs; `$NH_FLAKE` set to the repo; weekly user-GC timer (`--keep 5 --keep-since 3d`) |
+| `nh` | nicer `nixos-rebuild`/`home-manager` with diffs; `$NH_FLAKE` set to the repo. No scheduled GC (it could reap paths a running generation still references) — collect garbage manually with `nh clean all` / `nix-collect-garbage -d` |
 
 ## tmux
 
@@ -52,7 +52,7 @@ on top (work email, its own ssh config, extra packages).
 Linux console — drops you straight into a tmux session named `main` (attach if it
 exists, else create). Panes run a plain non-login zsh. It deliberately does **not**
 fire for SSH sessions, VS Code's integrated terminal, already-inside-tmux, or
-non-interactive shells.
+non-interactive shells. Escape hatch: `NO_TMUX=1 <terminal>` opens a bare shell.
 
 | Setting | Value |
 | --- | --- |
@@ -64,11 +64,21 @@ non-interactive shells.
 | `base-index` / `pane-base-index` | 1 |
 | Splits | `prefix s` vertical, `prefix v` horizontal (stock `%`/`"` unbound) |
 | Pane nav | `Alt`+arrows (no prefix) |
+| Terminal | `default-terminal tmux-256color`; truecolor advertised per outer terminal (`foot*`, `xterm-256color`/iTerm2) via `terminal-features … RGB` |
 | Clipboard | `set-clipboard on`; foot `terminal-features` advertise truecolor/sync/OSC52/title/cursor |
 
 **Plugins:** `sensible`, `vim-tmux-navigator` (Ctrl-h/j/k/l across vim ↔ tmux),
 `yank`, `catppuccin` (Mocha statusline), `resurrect` + `continuum`
-(sessions auto-save and restore across reboots).
+(sessions auto-save and restore across reboots). The statusline draws Nerd-Font
+glyphs — see Fonts.
+
+## Fonts
+
+**JetBrainsMono Nerd Font** is installed on every host (in `common-nixos.nix`,
+because tmux runs everywhere; the Mac installs it to `/Library/Fonts` via the
+Darwin config). foot uses it as its main font automatically. iTerm2's font is a
+GUI setting — set it to *JetBrainsMono Nerd Font* (Settings → Profiles → Text →
+Font) so the tmux statusline glyphs render instead of `?`.
 
 ## git
 
@@ -99,7 +109,7 @@ Conventional Commits.
 | Feature | Notes |
 | --- | --- |
 | ssh-agent | runs on Linux (launchd on macOS); keys added on **first use** so the passphrase is typed once per login session — this also feeds git commit signing |
-| macOS | `UseKeychain` caches the passphrase in the login keychain |
+| macOS | `UseKeychain` caches the passphrase in the login keychain (guarded by `IgnoreUnknown`, so a non-Apple `ssh` skips it instead of erroring) |
 | Gitea remote | `code.emmathe.dev` → `HostName 10.187.1.76` (DNS-override), `Port 30009`, user `git`, dedicated key, `identitiesOnly` |
 | Defaults | the module's deprecated default block is opted out; equivalents kept under `settings."*"` |
 
@@ -109,10 +119,10 @@ forced off there) but still runs the agent.
 ## Maintenance behaviours
 
 - **zcompdump reset** — `~/.zcompdump*` is removed on every activation, so a stale
-  dump (pointing at `/nix/store` paths a rebuild or the weekly GC removed) can't
+  dump (pointing at `/nix/store` paths a rebuild or a manual GC removed) can't
   break completion with `_git: function definition file not found`.
-- **Weekly GC** — `nh clean` runs weekly as a user timer, keeping the last 5
+- **GC** — no scheduled timer; collect garbage deliberately (`nh clean all` /
-  generations and anything newer than 3 days.
+  `nix-collect-garbage -d`) when no important session is running.
 
 ## Per-host differences