fix: auto-start local adb daemon and optimize path discovery across Linux, macOS and Windows

scripts/install_deps.ps1

@@ -39,7 +39,9 @@ function Update-EnvironmentPath {
     $standardDirs = @(
         "$env:LOCALAPPDATA\Microsoft\WinGet\Links",
         "$env:LOCALAPPDATA\Android\Sdk\platform-tools",
+        "$env:LOCALAPPDATA\Android\android-sdk\platform-tools",
         "$env:ProgramFiles\Android\platform-tools",
+        "${env:ProgramFiles(x86)}\Android\android-sdk\platform-tools",
         "$env:ProgramFiles\nodejs",
         "${env:ProgramFiles(x86)}\nodejs",
         "$env:APPDATA\npm",
@@ -47,16 +49,34 @@ function Update-EnvironmentPath {
         "$env:LOCALAPPDATA\Programs\node",
         "$env:USERPROFILE\.local\share\platform-tools",
         "$env:USERPROFILE\.local\share\node",
+        "$env:LOCALAPPDATA\nvm",
+        "$env:ProgramData\nvm",
         "C:\ProgramData\chocolatey\bin",
         "$env:USERPROFILE\scoop\shims",
         "$env:USERPROFILE\.local\bin",
         "$env:USERPROFILE\.cargo\bin"
     )
+    if ($env:ANDROID_HOME) { $standardDirs += "$env:ANDROID_HOME\platform-tools" }
+    if ($env:ANDROID_SDK_ROOT) { $standardDirs += "$env:ANDROID_SDK_ROOT\platform-tools" }
+    if ($env:NVM_HOME) { $standardDirs += $env:NVM_HOME }
+    if ($env:NVM_SYMLINK) { $standardDirs += $env:NVM_SYMLINK }
+
     $regPath = [Environment]::GetEnvironmentVariable("Path", "User") + ";" + [Environment]::GetEnvironmentVariable("Path", "Machine")
     $currentPaths = ($env:PATH -split ";") + ($regPath -split ";") + $standardDirs | Where-Object { [string]::IsNullOrWhiteSpace($_) -eq $false -and (Test-Path $_) } | Select-Object -Unique
     $env:PATH = $currentPaths -join ";"
 }
 
+function Start-LocalAdbServer {
+    if (Test-CommandExists "adb") {
+        try {
+            $origSocket = $env:ADB_SERVER_SOCKET
+            Remove-Item Env:\ADB_SERVER_SOCKET -ErrorAction SilentlyContinue
+            & adb start-server 2>$null | Out-Null
+            if ($origSocket) { $env:ADB_SERVER_SOCKET = $origSocket }
+        } catch {}
+    }
+}
+
 function Test-CommandExists {
     param([string]$Command)
     $res = Get-Command $Command -ErrorAction SilentlyContinue
@@ -132,6 +152,7 @@ if (-not (Test-CommandExists "scrcpy")) { $missingTools += "scrcpy" }
 
 if ($missingTools.Count -eq 0) {
     Write-Host "   ✔ All system toolchains are already installed (ADB, FFmpeg, scrcpy)." -ForegroundColor Green
+    Start-LocalAdbServer
 } else {
     Write-Host "   ! Missing toolchains: $($missingTools -join ', ')" -ForegroundColor DarkYellow
     $useWinGet = $false
@@ -175,6 +196,9 @@ if ($missingTools.Count -eq 0) {
     if (-not (Test-CommandExists "adb")) {
         Install-PortablePlatformTools
     }
+
+    # Ensure local ADB daemon is warm & listening
+    Start-LocalAdbServer
 }
 
 # 2. Check and Install uv (Fast Python Package Manager)
@@ -285,6 +309,7 @@ Write-Host "   ✨ Artemis Environment Ready!                      " -Foreground
 Write-Host "======================================================" -ForegroundColor Cyan
 
 if ($Launch -or $Open) {
+    Start-LocalAdbServer
     Write-Host "🚀 Launching Showcase UI..." -ForegroundColor Green
     uv run artemis ui --open
 } else {

scripts/install_deps.sh

@@ -127,12 +127,31 @@ install_system_packages() {
     local need_ffmpeg=false
     local need_scrcpy=false
 
+    if ! has_cmd adb; then
+        for candidate in \
+            "${ANDROID_HOME:-}/platform-tools" \
+            "${ANDROID_SDK_ROOT:-}/platform-tools" \
+            "${HOME}/Library/Android/sdk/platform-tools" \
+            "${HOME}/Android/Sdk/platform-tools" \
+            "${HOME}/.local/share/platform-tools" \
+            "/opt/homebrew/bin" \
+            "/usr/local/bin"; do
+            if [ -n "${candidate}" ] && [ -x "${candidate}/adb" ]; then
+                export PATH="${candidate}:${PATH}"
+                break
+            fi
+        done
+    fi
+
     if ! has_cmd adb; then need_adb=true; fi
     if ! has_cmd ffmpeg; then need_ffmpeg=true; fi
     if ! has_cmd scrcpy; then need_scrcpy=true; fi
 
     if [ "${need_adb}" = false ] && [ "${need_ffmpeg}" = false ] && [ "${need_scrcpy}" = false ]; then
         echo -e "   ${GREEN}✓ All core system tools are already installed.${NC}"
+        if has_cmd adb; then
+            (unset ADB_SERVER_SOCKET; adb start-server >/dev/null 2>&1 || true)
+        fi
         return 0
     fi
 
@@ -234,6 +253,11 @@ install_system_packages() {
             fi
         fi
     fi
+
+    # Ensure local ADB daemon is warm & listening
+    if has_cmd adb; then
+        (unset ADB_SERVER_SOCKET; adb start-server >/dev/null 2>&1 || true)
+    fi
 }
 
 # Function to ensure uv is installed and ready

scripts/start.ps1

@@ -34,7 +34,9 @@ function Update-EnvironmentPath {
     $standardDirs = @(
         "$env:LOCALAPPDATA\Microsoft\WinGet\Links",
         "$env:LOCALAPPDATA\Android\Sdk\platform-tools",
+        "$env:LOCALAPPDATA\Android\android-sdk\platform-tools",
         "$env:ProgramFiles\Android\platform-tools",
+        "${env:ProgramFiles(x86)}\Android\android-sdk\platform-tools",
         "$env:ProgramFiles\nodejs",
         "${env:ProgramFiles(x86)}\nodejs",
         "$env:APPDATA\npm",
@@ -42,16 +44,34 @@ function Update-EnvironmentPath {
         "$env:LOCALAPPDATA\Programs\node",
         "$env:USERPROFILE\.local\share\platform-tools",
         "$env:USERPROFILE\.local\share\node",
+        "$env:LOCALAPPDATA\nvm",
+        "$env:ProgramData\nvm",
         "C:\ProgramData\chocolatey\bin",
         "$env:USERPROFILE\scoop\shims",
         "$env:USERPROFILE\.local\bin",
         "$env:USERPROFILE\.cargo\bin"
     )
+    if ($env:ANDROID_HOME) { $standardDirs += "$env:ANDROID_HOME\platform-tools" }
+    if ($env:ANDROID_SDK_ROOT) { $standardDirs += "$env:ANDROID_SDK_ROOT\platform-tools" }
+    if ($env:NVM_HOME) { $standardDirs += $env:NVM_HOME }
+    if ($env:NVM_SYMLINK) { $standardDirs += $env:NVM_SYMLINK }
+
     $regPath = [Environment]::GetEnvironmentVariable("Path", "User") + ";" + [Environment]::GetEnvironmentVariable("Path", "Machine")
     $currentPaths = ($env:PATH -split ";") + ($regPath -split ";") + $standardDirs | Where-Object { [string]::IsNullOrWhiteSpace($_) -eq $false -and (Test-Path $_) } | Select-Object -Unique
     $env:PATH = $currentPaths -join ";"
 }
 
+function Start-LocalAdbServer {
+    if (Test-CommandExists "adb") {
+        try {
+            $origSocket = $env:ADB_SERVER_SOCKET
+            Remove-Item Env:\ADB_SERVER_SOCKET -ErrorAction SilentlyContinue
+            & adb start-server 2>$null | Out-Null
+            if ($origSocket) { $env:ADB_SERVER_SOCKET = $origSocket }
+        } catch {}
+    }
+}
+
 function Test-CommandExists {
     param([string]$Command)
     $res = Get-Command $Command -ErrorAction SilentlyContinue
@@ -164,6 +184,9 @@ if ($missingCore.Count -gt 0) {
     }
 }
 
+# Ensure local ADB daemon is warm & listening so probes do not hit 'Connection refused'
+Start-LocalAdbServer
+
 # 4. Check or initialize .env
 if (-not (Test-Path ".env")) {
     if (Test-Path ".env.example") {
@@ -259,6 +282,9 @@ if ($installMcp -match "^[Yy]") {
 Write-Host ""
 
 # 8. Launch unified Showcase UI & open browser
+# Ensure local ADB daemon is warm & listening
+Start-LocalAdbServer
+
 # Launch via `python -m artemis` (not the `artemis.exe` console-script shim) so the
 # long-running server never locks .venv\Scripts\artemis.exe against `uv sync` reinstalls.
 Write-Host "   [INFO] Launching Artemis Showcase UI & Admin Console..." -ForegroundColor Green