feat: migrate to gpui-kit 0.6 and add Shift+Esc panel zoom

.envrc

@@ -0,0 +1 @@
+use flake

.zed/tasks.json

@@ -1,7 +1,8 @@
 // Project tasks — Alt+T opens the picker (see keymap: task::Spawn)
 //
 // The check/clippy/test tasks set CARGO_TARGET_DIR so they don't invalidate what
-// `cargo run` and rust-analyzer built. See CLAUDE.md ▸ Commands.
+// `cargo run` and rust-analyzer built. The "(nix)" tasks supply GPUI's Linux libraries through
+// `nix/devshell.nix`; with direnv and nix-direnv, the plain tasks work on Linux too.
 [
   {
     "label": "cargo run (app)",
@@ -31,6 +32,27 @@
     "label": "CI (fmt + clippy + test)",
     "command": "./scripts/ci.sh"
   },
+  {
+    "label": "cargo run (nix)",
+    "command": "nix-shell --run 'cargo run -p app'",
+    "reveal": "always",
+    "use_new_terminal": false
+  },
+  {
+    "label": "cargo test (nix)",
+    "command": "nix-shell --run 'CARGO_TARGET_DIR=target/ci cargo test --workspace'"
+  },
+  {
+    "label": "CI checks (nix)",
+    "command": "nix-shell --run './scripts/ci.sh'",
+    "reveal": "always"
+  },
+  {
+    "label": "nix dev shell",
+    "command": "nix-shell",
+    "reveal": "always",
+    "use_new_terminal": true
+  },
   {
     "label": "lazygit",
     "command": "lazygit"

CLAUDE.md

@@ -135,6 +135,8 @@ executable** first and then on the system. A checkout without them builds, launc
 ./scripts/fetch-binaries.sh target/release  # before building an installer
 ```
 
+On Windows, use `./scripts/fetch-binaries.ps1` from PowerShell.
+
 Consequence for tests: `preview`'s PDF and media tests assert *behaviour that depends on what is
 installed*. With the binary present they require a real render; without it they require a clean
 decline. Both directions are real assertions — if a test says "skipping", that is the no-binary

CONTRIBUTING.md

@@ -18,7 +18,16 @@ cargo run
 
 The first build downloads Rust dependencies. The [`sample/`](sample) directory contains a sample collection and images for local testing. qrate builds and runs without optional preview binaries; PDF and video preview coverage needs the tools described in [the development setup guide](docs/dev/SETUP.md).
 
-Linux contributors also need the system libraries listed in [`.github/workflows/ci.yml`](.github/workflows/ci.yml). Google Sheets sign-in is optional for local development and needs local credentials; setup details are in [the development setup guide](docs/dev/SETUP.md).
+Linux contributors also need the system libraries listed in [`.github/workflows/ci.yml`](.github/workflows/ci.yml). GPUI links `fontconfig`, `freetype`, `alsa-lib` and `openssl` through `pkg-config` at build time, and `dlopen`s `libxkbcommon`, `wayland`, `vulkan-loader`, `libGL` and the X11 client libraries at run time — a build that links cleanly still fails to start without the second group. Without `pkg-config` on `PATH` the build stops in `yeslogic-fontconfig-sys`.
+
+On NixOS, or with Nix installed anywhere, the shell in this repository supplies all of that and sets `LD_LIBRARY_PATH` so `cargo run` works:
+
+```sh
+nix develop      # flake, pins nixpkgs through flake.lock
+nix-shell        # same shell without flakes, using your own channel
+```
+
+Both read [`nix/devshell.nix`](nix/devshell.nix), so they cannot drift apart. Google Sheets sign-in is optional for local development and needs local credentials; setup details are in [the development setup guide](docs/dev/SETUP.md).
 
 ## Make a contribution