fix(dev): use portable Bash shebangs (#2536)

Resolve Bash through PATH so repository development entrypoints run on NixOS and other systems without /bin/bash.

docs/coding-standards.md

@@ -14,6 +14,10 @@ For testing rules, see [testing.md](testing.md).
 - **`interface`** over `type` when both work.
 - **No `index.ts` barrel files** that only re-export — they create indirection and circular-dep risk. Import from the source.
 
+## Shell scripts
+
+- Bash scripts always use `#!/usr/bin/env bash`. Never hard-code `/bin/bash` or `/usr/bin/bash`; those paths are not portable to environments such as NixOS.
+
 ## Comments and noise
 
 - Delete any comment where removing it loses zero information. Comments explain _why_, not _what_.

packages/desktop/scripts/dev.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

scripts/dev-app.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

scripts/dev-daemon.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

scripts/dev-home.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 default_dev_paseo_root() {
   git rev-parse --show-toplevel 2>/dev/null || pwd

scripts/dev.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 
 exec npm run dev:server

scripts/paseo-ios-simulator-service.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -euo pipefail
 
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"