feat: find-in-files sidebar, command bar with :cd re-root, terminal tabs + diff viewer

README.md

@@ -61,6 +61,10 @@ The goals, in order:
   you get a heads-up; if the file is deleted, the tab is flagged once.
 - **Toggleable, draggable sidebar** — show/hide the file tree from the
   menu, or drag the splitter to resize it.
+- **Terminal in a tab** — open your `$SHELL` in a real tab (`Esc \`` or
+  **Open terminal in new tab** from the`≡` menu) and run tests or git
+  without leaving the editor. Rendered by a built-in VT emulator, so it
+  works over SSH and inside `tmux` with no passthrough config.
 - **Clipboard over SSH** — OSC 52, including a `tmux` passthrough so
   copy works from inside a tmux session on a remote host.
 - **Format on save** — opt-in per-project via `.spiceedit/format.json`
@@ -191,6 +195,8 @@ within half a second tap one of the letters below.
 | `Esc /`     | Toggle line comment  |
 | `Esc f`     | Find in file         |
 | `Esc p`     | Find file in project |
+| `Esc F`     | Find in files        |
+| `Esc \``    | Open terminal tab    |
 
 A lone `Esc` is harmless — if you don't follow it with a bound key
 within the window, your next keystroke goes to the editor as normal,
@@ -250,6 +256,77 @@ fuzzy file finder over every non-ignored file in the project:
   inside the editor.
 - Only files are listed — no directories, no symlinked duplicates.
 
+### Find in files
+
+`Esc F` (`Esc` then `Shift+F`, or **Find in files** from the `≡`
+menu) searches the *contents* of every non-ignored file in the
+project — the VS Code "Find in Files" (`Ctrl+Shift+F`) gesture:
+
+```
+┌ Find in files                                              esc ┐
+│  main.go                                                42       │
+│  main.go:3 func widget() {}                                       │
+│  internal/app/app.go:2 // a widget lives here                     │
+│  ...                                                              │
+└──────────────────────────────────────────────────────────┘
+```
+
+- Type a word — matching is **case-insensitive substring**, the same
+  as the in-file find. Each row is one match: `path:line` followed by
+  the source line, with the hit highlighted.
+- `↑` / `↓` to move through matches, `Enter` to jump straight to the
+  match (opens the file and drops the cursor on it), `Esc` to dismiss.
+  Mouse hover highlights, click jumps, and the wheel scrolls the list.
+- Shares the finder's index, so the scope is identical: it greps the
+  same `.gitignore`-honouring file set and never descends into
+  `node_modules`, `.git`, or vendored dumps.
+- Binary files (detected by a NUL byte) and files larger than 2 MB are
+  skipped, so a stray asset or minified bundle can't stall a search.
+- The grep runs on a background goroutine and results stream in as
+  they land, so typing stays responsive even on a large repo.
+
+There's no regex, whole-word, or case-sensitive toggle in v1 — the
+common case is "which files mention this word — take me there."
+
+## Terminal tabs
+
+`Esc \`` (or **Open terminal in new tab** from the`≡` menu) opens your
+`$SHELL` in a new tab, so you can run tests, `git`, or anything else
+without dropping the editor or reaching for a second tmux pane.
+
+The terminal starts in the folder you're currently working in (the
+selected file's directory, falling back to the project root), so
+relative commands land where you expect.
+
+It's a real terminal, not a log pane: SpiceEdit embeds a VT emulator and
+paints the shell's screen into the tab, so `Ctrl+C`, colours, and
+full-screen programs all behave. Because the editor owns the emulation,
+none of it leaks into your host terminal — it works over SSH and inside
+`tmux` with no passthrough configuration.
+
+A few deliberate details:
+
+- **`Esc` belongs to the editor.** It's the only key the terminal never
+  receives, because double-tapping it is how you get back to the `≡`
+  menu. Everything else — including `Ctrl+C`, `Ctrl+D`, `Ctrl+Z`, and
+  arrow-key history — goes to the shell.
+- **The `Esc`-leader shortcuts stand down inside a terminal.** Elsewhere
+  `Esc s` saves and `Esc q` quits, but a shell prompt is the one place
+  you press `Esc` by reflex, and swallowing the next key to run an editor
+  action would be both surprising and destructive. Double-tap `Esc` for
+  the menu instead — every action is still there.
+- **Terminal tabs never look "unsaved."** They have no file, so Save,
+  Find, and the git gutter skip them, and quitting won't prompt about
+  them.
+- **Closing the tab closes the shell**, and quitting the editor closes
+  every terminal it opened. Backgrounded jobs are hung up with the shell
+  rather than orphaned.
+- **The status bar** shows `terminal · shell running`, or the exit
+  status once the shell has exited.
+
+Terminal tabs are unix-only (macOS and Linux). On Windows the menu row
+is greyed out, since Windows has no PTY the editor can drive this way.
+
 ## Custom actions (open remote files on your laptop)
 
 [![Watch the walkthrough](https://img.youtube.com/vi/vDWZWEmIiZ8/maxresdefault.jpg)](https://www.youtube.com/watch?v=vDWZWEmIiZ8)

go.mod

@@ -4,7 +4,9 @@ go 1.24.0
 
 require (
 	github.com/alecthomas/chroma/v2 v2.24.0
+	github.com/creack/pty v1.1.24
 	github.com/gdamore/tcell/v2 v2.13.9
+	github.com/hinshun/vt10x v0.0.0-20220301184237-5011da428d02
 	github.com/sabhiram/go-gitignore v0.0.0-20210923224102-525f6e181f06
 )
 

go.sum

@@ -4,6 +4,8 @@ github.com/alecthomas/chroma/v2 v2.24.0 h1:zrg+k0tAaVbM8whaT2hR5DOUqAdopsDaH998E
 github.com/alecthomas/chroma/v2 v2.24.0/go.mod h1:l+ohZ9xRXIbGe7cIW+YZgOGbvuVLjMps/FYN/CwuabI=
 github.com/alecthomas/repr v0.5.2 h1:SU73FTI9D1P5UNtvseffFSGmdNci/O6RsqzeXJtP0Qs=
 github.com/alecthomas/repr v0.5.2/go.mod h1:Fr0507jx4eOXV7AlPV6AVZLYrLIuIeSOWtW57eE/O/4=
+github.com/creack/pty v1.1.24 h1:bJrF4RRfyJnbTJqzRLHzcGaZK1NeM5kTC9jGgovnR1s=
+github.com/creack/pty v1.1.24/go.mod h1:08sCNb52WyoAwi2QDyzUCTgcvVFhUzewun7wtTfvcwE=
 github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dlclark/regexp2 v1.12.0 h1:0j4c5qQmnC6XOWNjP3PIXURXN2gWx76rd3KvgdPkCz8=
@@ -14,6 +16,8 @@ github.com/gdamore/tcell/v2 v2.13.9 h1:uI5l3DYPcFvHINKlGft+en23evOKL+dwtD21QR8ej
 github.com/gdamore/tcell/v2 v2.13.9/go.mod h1:+Wfe208WDdB7INEtCsNrAN6O2m+wsTPk1RAovjaILlo=
 github.com/hexops/gotextdiff v1.0.3 h1:gitA9+qJrrTCsiCl7+kh75nPqQt1cx4ZkudSTLoUqJM=
 github.com/hexops/gotextdiff v1.0.3/go.mod h1:pSWU5MAI3yDq+fZBTazCSJysOMbxWL1BSow5/V2vxeg=
+github.com/hinshun/vt10x v0.0.0-20220301184237-5011da428d02 h1:AgcIVYPa6XJnU3phs104wLj8l5GEththEw6+F79YsIY=
+github.com/hinshun/vt10x v0.0.0-20220301184237-5011da428d02/go.mod h1:Q48J4R4DvxnHolD5P8pOtXigYlRuPLGl6moFx3ulM68=
 github.com/lucasb-eyer/go-colorful v1.3.0 h1:2/yBRLdWBZKrf7gB40FoiKfAWYQ0lqNcbuQwVHXptag=
 github.com/lucasb-eyer/go-colorful v1.3.0/go.mod h1:R4dSotOR9KMtayYi1e77YzuveK+i7ruzyGqttikkLy0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=