fix(packaging): actually ship the TMDB token, on Linux and Windows

default.env was empty in every build, for three independent reasons:

1. build-node.sh read QE/node.env, which does not exist. Even pointed at the
   real file it would have failed: its `grep MESHBAY_TMDB_DEFAULT_TOKEN=`
   cannot match QE/tmdb.txt, which is a free-form note, not KEY=VALUE.

2. Nothing consumed default.env. packaging/README.md and build-node.sh both
   claimed `meshbay-node init` copies it to <config>/node.env; grep found the
   name in exactly two places, the README and the script that writes it. No
   code implemented the copy, and `EnvironmentFile=-` hid the absence.

3. build-win.ps1 had no env handling at all, so Windows was empty for a
   different reason than Linux.

Now: the build extracts the v4 read token -- tmdb.py sends `Authorization:
Bearer`, so it is the JWT, not the 32-char v3 key beside it in the same file --
matching KEY=VALUE first and then by shape, from MESHBAY_TMDB_TOKEN,
MESHBAY_TMDB_TOKEN_FILE, QE/node.env, QE/tmdb.txt. It writes default.env 0600
and *fails the build* if no token resolves; MESHBAY_ALLOW_NO_TMDB=1 opts out.
An empty default.env is invisible until a user opens Videos and finds no
metadata, which is how this shipped empty on two platforms at once.

platform.py gains packaged_default_env()/install_node_env()/load_node_env().
init copies the packaged file once, never overwriting an existing node.env,
and the daemon loads node.env itself at startup: systemd does this on Linux
via EnvironmentFile, but Windows autostart is a Startup-folder .vbs with no
equivalent. Already-set variables always win.

Also fixes an UnboundLocalError in main(): `config_dir` was assigned at the
top of the init branch, which made it function-local for all of main(), while
the reset branch calls `config_dir()` as the imported function. init returns
before that line, so `meshbay-node reset` could only ever raise. The local is
now cfg_dir.

Verified end to end on Linux: token baked (239 chars), init writes
<config>/node.env 0600 with it. The PowerShell half is written but unrun --
no pwsh on this machine.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DtfG7z6wHWj8RKHCvxQtY1

1 files changed, 50 insertions, 2 deletions

diff --git a/packaging/win/build-node-runtime.ps1 b/packaging/win/build-node-runtime.ps1
index c432e01..5097b37 100644
--- a/packaging/win/build-node-runtime.ps1
+++ b/packaging/win/build-node-runtime.ps1
@@ -117,14 +117,62 @@ else {
     Write-Host "    ffmpeg not bundled -- the node will look for it on PATH" -ForegroundColor Yellow
 }
 
-# --- 5. publish ----------------------------------------------------
+# --- 5. default.env (shared TMDB token) ------------------------------
+# Beside the exe, where platform.packaged_default_env() looks for it, and the
+# same placement ffmpeg gets above. `meshbay-node init` copies it to
+# %LOCALAPPDATA%\meshbay\node.env, and the daemon loads that file itself:
+# Windows autostart is a Startup-folder .vbs, with no systemd EnvironmentFile.
+function Get-TmdbToken([string]$File) {
+    if (-not $File -or -not (Test-Path -LiteralPath $File)) { return "" }
+    $lines = Get-Content -LiteralPath $File
+    foreach ($line in $lines) {
+        if ($line -match '^\s*MESHBAY_TMDB_DEFAULT_TOKEN\s*=\s*(.+)$') {
+            return $Matches[1].Trim().Trim('"').Trim("'")
+        }
+    }
+    # QE\tmdb.txt is free-form prose: match the v4 read token by shape. The
+    # 32-char v3 API key in the same file is NOT what tmdb.py sends (Bearer).
+    foreach ($line in $lines) {
+        if ($line -match '^(eyJ[A-Za-z0-9._-]{40,})\s*$') { return $Matches[1] }
+    }
+    return ""
+}
+
+$tmdb = $env:MESHBAY_TMDB_TOKEN
+if (-not $tmdb) { $tmdb = Get-TmdbToken $env:MESHBAY_TMDB_TOKEN_FILE }
+if (-not $tmdb) { $tmdb = Get-TmdbToken (Join-Path $Repo "QE\node.env") }
+if (-not $tmdb) { $tmdb = Get-TmdbToken (Join-Path $Repo "QE\tmdb.txt") }
+
+$envFile = Join-Path $frozen "default.env"
+$noBom = New-Object System.Text.UTF8Encoding $false   # a BOM would break parsing
+if ($tmdb) {
+    $body = @(
+        "# Default environment for meshbay-node.",
+        "# Copied to <config>\node.env by 'meshbay-node init' if it does not exist.",
+        "",
+        "# TMDB API token for the Videos app (read-only, shared across installations)",
+        "MESHBAY_TMDB_DEFAULT_TOKEN=$tmdb"
+    ) -join "`n"
+    [System.IO.File]::WriteAllText($envFile, $body + "`n", $noBom)
+    Step ("TMDB token baked into default.env ({0} chars)" -f $tmdb.Length)
+}
+elseif ($env:MESHBAY_ALLOW_NO_TMDB -eq "1") {
+    [System.IO.File]::WriteAllText($envFile, "", $noBom)
+    Write-Host "    !! no TMDB token; default.env left empty (MESHBAY_ALLOW_NO_TMDB=1)" -ForegroundColor Yellow
+}
+else {
+    throw ("TMDB token not found (MESHBAY_TMDB_TOKEN, MESHBAY_TMDB_TOKEN_FILE, " +
+           "QE\node.env, QE\tmdb.txt). Set MESHBAY_ALLOW_NO_TMDB=1 to build without it.")
+}
+
+# --- 6. publish ----------------------------------------------------
 Move-Item $frozen $OutDir
 Remove-Item -Recurse -Force $pyiWork, $pyiDist -ErrorAction SilentlyContinue
 if ($createdVenv -and -not $KeepBuildVenv) {
     Remove-Item -Recurse -Force $BuildVenv -ErrorAction SilentlyContinue
 }
 
-# --- 6. smoke test -----------------------------------------------
+# --- 7. smoke test -----------------------------------------------
 # Capture, do NOT pipe to Select-Object -First: that stops the native process
 # mid-write and reports a spurious non-zero exit.
 Step "smoke test: meshbay-node --help"