detect: read Legendary/Heroic installed.json, remove name generation

Add stage 2: read Legendary and Heroic's installed.json files from all
known locations (native + Flatpak) to build a install-path → title map.
This covers Epic games (via Legendary) and GOG games (via Heroic's GOG
store) before any fallback is needed.

Remove CamelCase/digit-boundary splitting from the fallback entirely.
If stages 2-4 all miss, nearest_dir_name() returns the closest
non-generic parent directory name, or the raw exe stem as-is. No names
are fabricated from the exe filename.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/detect.rs

@@ -118,6 +118,82 @@ const SKIP_EXES: &[&str] = &[
 static NAME_CACHE: LazyLock<Mutex<HashMap<PathBuf, String>>> =
     LazyLock::new(|| Mutex::new(HashMap::new()));
 
+/// Install-path → display title, built once from Legendary / Heroic metadata.
+static STORE_TITLES: LazyLock<HashMap<PathBuf, String>> =
+    LazyLock::new(build_store_titles);
+
+/// Read every `installed.json` that Legendary or Heroic may have written and
+/// return a map of absolute install directory → game title.
+fn build_store_titles() -> HashMap<PathBuf, String> {
+    let mut map = HashMap::new();
+    let Ok(home) = std::env::var("HOME") else { return map };
+    let home = PathBuf::from(home);
+
+    // Legendary standalone + Heroic's bundled copy (native and Flatpak).
+    let legendary_candidates = [
+        home.join(".config/legendary/installed.json"),
+        home.join(".config/heroic/legendaryConfig/legendary/installed.json"),
+        home.join(".var/app/com.heroicgameslauncher.hgl/config/legendary/installed.json"),
+        home.join(".var/app/com.heroicgameslauncher.hgl/config/heroic/legendaryConfig/legendary/installed.json"),
+    ];
+    for path in &legendary_candidates {
+        if let Ok(text) = std::fs::read_to_string(path) {
+            parse_legendary_installed(&text, &mut map);
+        }
+    }
+
+    // Heroic GOG store (native and Flatpak).
+    let gog_candidates = [
+        home.join(".config/heroic/gog_store/installed.json"),
+        home.join(".var/app/com.heroicgameslauncher.hgl/config/heroic/gog_store/installed.json"),
+    ];
+    for path in &gog_candidates {
+        if let Ok(text) = std::fs::read_to_string(path) {
+            parse_heroic_gog_installed(&text, &mut map);
+        }
+    }
+
+    map
+}
+
+/// Legendary `installed.json`: `{ "AppName": { "install_path": "...", "title": "..." } }`
+fn parse_legendary_installed(text: &str, map: &mut HashMap<PathBuf, String>) {
+    let Ok(json) = serde_json::from_str::<serde_json::Value>(text) else { return };
+    let Some(obj) = json.as_object() else { return };
+    for entry in obj.values() {
+        let Some(path) = entry.get("install_path").and_then(|v| v.as_str()) else { continue };
+        let Some(title) = entry.get("title").and_then(|v| v.as_str()) else { continue };
+        if !title.is_empty() {
+            map.insert(PathBuf::from(path), title.to_string());
+        }
+    }
+}
+
+/// Heroic GOG `installed.json`: `{ "installed": [ { "install_path": "...", "title": "..." } ] }`
+fn parse_heroic_gog_installed(text: &str, map: &mut HashMap<PathBuf, String>) {
+    let Ok(json) = serde_json::from_str::<serde_json::Value>(text) else { return };
+    let Some(arr) = json.get("installed").and_then(|v| v.as_array()) else { return };
+    for entry in arr {
+        let Some(path) = entry.get("install_path").and_then(|v| v.as_str()) else { continue };
+        let Some(title) = entry.get("title").and_then(|v| v.as_str()) else { continue };
+        if !title.is_empty() {
+            map.insert(PathBuf::from(path), title.to_string());
+        }
+    }
+}
+
+/// Walk up from `exe_path` checking each ancestor against `STORE_TITLES`.
+fn store_title(exe_path: &Path) -> Option<String> {
+    let mut dir = exe_path.parent();
+    while let Some(d) = dir {
+        if let Some(title) = STORE_TITLES.get(d) {
+            return Some(title.clone());
+        }
+        dir = d.parent();
+    }
+    None
+}
+
 /// Scan a launcher's Wine prefix for installed game executables.
 /// Returns (display_name, path_relative_to_drive_c) pairs, sorted alphabetically,
 /// excluding the launcher's own exe and any already-configured games.
@@ -208,13 +284,15 @@ fn scan_exe_dir(
 ///
 /// Resolution pipeline (first hit wins):
 /// 1. Explicit name — if `explicit_name` is `Some`, return it immediately.
-/// 2. Store/platform metadata — reserved for future integration.
+/// 2. Legendary / Heroic `installed.json` — maps install path → title,
+///    covers both Epic (via Legendary) and GOG (via Heroic's GOG store).
 /// 3. Manifest walk — walks up from the exe looking for GOG `.info` and
 ///    Epic `.egstore/*.item` JSON files at the game's installation root.
 /// 4. Launcher path — reads the game name from well-known directory
 ///    structures laid down by the launcher (e.g. `Epic Games/<Name>/`).
-/// 5. Heuristic fallback — nearest non-generic parent directory name,
+/// 5. Nearest non-generic parent directory name, or raw exe stem.
-///    or the exe stem with CamelCase / digit boundaries split into words.
+///    No name generation — if the directory name is unknown, it is used
+///    as-is rather than being fabricated from the exe filename.
 ///
 /// Results from stages 2–5 are cached by path after first computation.
 pub fn resolve_game_name(exe_path: &Path, explicit_name: Option<&str>) -> String {
@@ -240,7 +318,10 @@ pub fn resolve_game_name(exe_path: &Path, explicit_name: Option<&str>) -> String
 }
 
 fn resolve_uncached(exe_path: &Path) -> String {
-    // Stage 2 – store/platform metadata (future integration point)
+    // Stage 2 – Legendary / Heroic installed.json (install path → title)
+    if let Some(name) = store_title(exe_path) {
+        return name;
+    }
 
     // Stage 3 – manifest files at the game's installation root
     if let Some(name) = read_manifest_name(exe_path) {
@@ -252,8 +333,9 @@ fn resolve_uncached(exe_path: &Path) -> String {
         return name;
     }
 
-    // Stage 5 – heuristic fallback
+    // Stage 5 – nearest non-generic parent directory, or raw exe stem.
-    prettify_exe_name(exe_path)
+    // No name generation: if we don't know, we say so honestly.
+    nearest_dir_name(exe_path)
 }
 
 /// Walk up from `exe_path` looking for platform manifest files that record the
@@ -345,11 +427,7 @@ fn name_from_launcher_path(exe_path: &Path) -> Option<String> {
     None
 }
 
-/// Heuristic last-resort name derivation from an exe path.
+fn nearest_dir_name(path: &Path) -> String {
-///
-/// Walks up parent directories looking for a non-generic name; falls back to
-/// inserting spaces into the CamelCase / digit-boundary exe stem.
-pub fn prettify_exe_name(path: &Path) -> String {
     const GENERIC_DIRS: &[&str] = &[
         "bin", "binaries", "x64", "x86", "win64", "win32", "retail",
         "shipping", "game", "runtime", "_retail_", "_commonredist",
@@ -357,8 +435,7 @@ pub fn prettify_exe_name(path: &Path) -> String {
     ];
 
     let mut dir = path.parent();
-    for _ in 0..3 {
+    while let Some(d) = dir {
-        let Some(d) = dir else { break };
         let name = d.file_name().and_then(|n| n.to_str()).unwrap_or("");
         let lower = name.to_lowercase();
         if !name.is_empty()
@@ -370,38 +447,11 @@ pub fn prettify_exe_name(path: &Path) -> String {
         dir = d.parent();
     }
 
-    let stem = path
+    // Nothing useful in the path — return the exe stem as-is.
-        .file_stem()
+    path.file_stem()
         .and_then(|s| s.to_str())
-        .unwrap_or("Unknown");
+        .unwrap_or("Unknown")
-
+        .to_string()
-    // Insert spaces at CamelCase and digit boundaries.
-    let mut out = String::with_capacity(stem.len() + 4);
-    let chars: Vec<char> = stem.chars().collect();
-    for (i, &c) in chars.iter().enumerate() {
-        if i > 0 {
-            let prev = chars[i - 1];
-            if (prev.is_alphabetic() && c.is_ascii_digit())
-                || (prev.is_ascii_digit() && c.is_alphabetic())
-            {
-                out.push(' ');
-            } else if prev.is_lowercase() && c.is_uppercase() {
-                out.push(' ');
-            } else if i + 1 < chars.len()
-                && prev.is_uppercase()
-                && c.is_uppercase()
-                && chars[i + 1].is_lowercase()
-            {
-                out.push(' ');
-            }
-        }
-        if c == '_' || c == '-' {
-            out.push(' ');
-        } else {
-            out.push(c);
-        }
-    }
-    out
 }
 
 const MAX_DEPTH: u32 = 3;