feat(games): default gamedata_dir to /usr/local/homer-core/gamedata

Matches the package install prefix, so a packaged deployment only needs
to download the WAD — no config edit. A missing directory yields plain
404s and the widget shows the provisioning hint; explicit empty string
still disables the /gamedata/ route (struct-tag defaults are seeded
before unmarshal, so file-present values win).

Author: adubovikov

docs/COORDINATOR.md

@@ -192,7 +192,7 @@ Authorization **code** flow (server exchanges `code`, loads userinfo, provisions
 | `read_timeout` | int | 30 | Read timeout in seconds |
 | `write_timeout` | int | 30 | Write timeout in seconds |
 | `static_path` | string | "" | Path to UI static files (optional) |
-| `gamedata_dir` | string | "" | On-disk directory served read-only at `/gamedata/` for large game assets (Doom widget IWAD). Empty disables the route. See `docs/VOIPGames.md`. |
+| `gamedata_dir` | string | "/usr/local/homer-core/gamedata" | On-disk directory served read-only at `/gamedata/` for large game assets (Doom widget IWAD). A missing directory yields 404s; empty string disables the route. See `docs/VOIPGames.md`. |
 
 ### nodes
 

docs/VOIPGames.md

@@ -335,17 +335,17 @@ over same-origin `postMessage` (`doomWad.ts` validates the frames).
 
 The shareware `doom1.wad` is freely distributable but deliberately kept out
 of the repo, the UI bundle, and the `go:embed` binary. On the coordinator
-host:
+host (the script ships with the deb/rpm under
+`/usr/local/homer-core/scripts/`):
 
 ```bash
-./scripts/fetch-doom-wad.sh /usr/local/homer-core/gamedata
+sudo /usr/local/homer-core/scripts/fetch-doom-wad.sh /usr/local/homer-core/gamedata
 ```
 
-then set the config and restart:
-
-```json
-{ "coordinator": { "http_server": { "gamedata_dir": "/usr/local/homer-core/gamedata" } } }
-```
+`gamedata_dir` defaults to `/usr/local/homer-core/gamedata`, so with the
+package layout no config change is needed — just download the WAD. To serve
+from another directory set `coordinator.http_server.gamedata_dir`; an empty
+string disables the `/gamedata/` route entirely.
 
 Any IWAD/PWAD named `doom1.wad` in that directory works (full Doom,
 Freedoom Phase 1 renamed — note vanilla visplane limits apply). If the WAD

src/config/config.go

@@ -710,8 +710,9 @@ type CoordinatorHTTPServerConfig struct {
 	StaticPath   string `json:"static_path" mapstructure:"static_path" default:""`
 	// GamedataDir is an on-disk directory served read-only at /gamedata/.
 	// Used for large game assets (e.g. the Doom widget IWAD) that must not
-	// be embedded into the binary via go:embed. Empty = route disabled.
-	GamedataDir string `json:"gamedata_dir" mapstructure:"gamedata_dir" default:""`
+	// be embedded into the binary via go:embed. The default matches the
+	// package install prefix; a missing directory simply yields 404s.
+	GamedataDir string `json:"gamedata_dir" mapstructure:"gamedata_dir" default:"/usr/local/homer-core/gamedata"`
 }
 
 // NodeEndpoint defines a FlightSQL node to query
@@ -1256,6 +1257,7 @@ func setDefaults(v *viper.Viper) {
 	v.SetDefault("coordinator.http_server.enable", true)
 	v.SetDefault("coordinator.http_server.host", "0.0.0.0")
 	v.SetDefault("coordinator.http_server.port", 8080)
+	v.SetDefault("coordinator.http_server.gamedata_dir", "/usr/local/homer-core/gamedata")
 	v.SetDefault("coordinator.settings_db_path", "/var/lib/homer/homer_settings.duckdb")
 	v.SetDefault("coordinator.lake_name", "homer_lake")
 	v.SetDefault("coordinator.jwt.expire_hours", 24)

src/ui/src/dashboard/widgets/DoomPanel.tsx

@@ -144,11 +144,12 @@ export default function DoomPanel() {
               the coordinator host run:
             </p>
             <code className="rounded bg-muted px-2 py-1 text-[11px]">
-              ./scripts/fetch-doom-wad.sh /path/to/gamedata
+              scripts/fetch-doom-wad.sh /usr/local/homer-core/gamedata
             </code>
             <p className="max-w-80 text-center text-xs text-muted-foreground">
-              and set <code className="text-[11px]">coordinator.http_server.gamedata_dir</code> to
-              that directory, then restart homer-core.
+              (default <code className="text-[11px]">gamedata_dir</code>; override via{' '}
+              <code className="text-[11px]">coordinator.http_server.gamedata_dir</code>, then
+              restart homer-core)
             </p>
             <Button size="sm" variant="outline" className="h-6 px-2 text-xs" onClick={start}>
               Retry