fix: ffmpeg version detection and player letterboxing

ffmpeg only accepts -version (single dash); it exits 8 on --version and
writes to stderr, so the status panel reported it missing even when
installed. Version flags are now per-tool and both streams are read.

The player used max-h-full inside a grid, which a 1080x1920 Short
overflowed. Switched to absolute fill with object-contain so portrait
and landscape both letterbox correctly.

Also sized the window to 1180x780 centered, which fits a laptop display.

src-tauri/src/commands.rs

@@ -80,29 +80,32 @@ fn bin(name: &str) -> String {
     name.to_string()
 }
 
-fn version_of(name: &str) -> Option<String> {
-    std::process::Command::new(bin(name))
-        .arg("--version")
+/// `flag` differs per tool: yt-dlp takes `--version`, ffmpeg only accepts
+/// `-version` (it exits non-zero on `--version` and writes to stderr), so the
+/// flag is passed in and both streams are consulted.
+fn version_of(name: &str, flag: &str) -> Option<String> {
+    let out = std::process::Command::new(bin(name))
+        .arg(flag)
         .output()
-        .ok()
-        .filter(|o| o.status.success())
-        .map(|o| {
-            String::from_utf8_lossy(&o.stdout)
-                .lines()
-                .next()
-                .unwrap_or("")
-                .trim()
-                .to_string()
-        })
-        .filter(|s| !s.is_empty())
+        .ok()?;
+    if !out.status.success() {
+        return None;
+    }
+    let text = if out.stdout.is_empty() {
+        String::from_utf8_lossy(&out.stderr).to_string()
+    } else {
+        String::from_utf8_lossy(&out.stdout).to_string()
+    };
+    let first = text.lines().next().unwrap_or("").trim().to_string();
+    (!first.is_empty()).then_some(first)
 }
 
 #[tauri::command]
 pub async fn check_prereqs(state: State<'_, AppState>) -> Result<Prereqs, String> {
     let library = state.library.lock().await.clone();
     Ok(Prereqs {
-        yt_dlp: version_of("yt-dlp"),
-        ffmpeg: version_of("ffmpeg").map(|v| {
+        yt_dlp: version_of("yt-dlp", "--version"),
+        ffmpeg: version_of("ffmpeg", "-version").map(|v| {
             // ffmpeg's first line is long; keep the useful head of it.
             v.split_whitespace().take(3).collect::<Vec<_>>().join(" ")
         }),

src-tauri/tauri.conf.json

@@ -13,10 +13,11 @@
     "windows": [
       {
         "title": "FlightTube",
-        "width": 1280,
-        "height": 840,
-        "minWidth": 940,
-        "minHeight": 600
+        "width": 1180,
+        "height": 780,
+        "minWidth": 900,
+        "minHeight": 560,
+        "center": true
       }
     ],
     "security": {

src-tauri/tests/seed_real_db.rs

@@ -0,0 +1,56 @@
+//! Populates the installed app's database using the app's own code paths, so
+//! the UI can be verified against real data without driving the file dialog.
+//! Run with: cargo test --test seed_real_db -- --ignored --nocapture
+
+use flighttube_lib::{db::Db, feed, models::FeedFilter, thumbs};
+use std::path::PathBuf;
+
+fn app_data() -> PathBuf {
+    PathBuf::from(std::env::var("HOME").unwrap())
+        .join("Library/Application Support/com.vincent.flighttube")
+}
+
+#[tokio::test]
+#[ignore]
+async fn seed() {
+    let dir = app_data();
+    let mut db = Db::open(&dir.join("flighttube.db")).expect("open real db");
+
+    let channels = db.channel_ids().unwrap();
+    println!("channels in db: {}", channels.len());
+    assert!(!channels.is_empty(), "seed channels first");
+
+    let http = reqwest::Client::builder()
+        .user_agent("FlightTube/0.1 (+desktop)")
+        .timeout(std::time::Duration::from_secs(20))
+        .build()
+        .unwrap();
+
+    let mut total = 0;
+    for cid in &channels {
+        if let Ok(v) = feed::fetch_channel(&http, cid).await {
+            total += v.len();
+            db.upsert_videos(&v).unwrap();
+        }
+    }
+    println!("videos upserted: {total}");
+
+    // Cache thumbnails so the feed renders with no network.
+    let pending = db.videos_missing_thumbs(400).unwrap();
+    println!("thumbnails to cache: {}", pending.len());
+    let tdir = thumbs::cache_dir(&dir);
+    let mut ok = 0;
+    for (id, url) in pending {
+        if let Ok(p) = thumbs::cache_one(&http, &id, &url, &tdir).await {
+            db.set_thumb_path(&id, &p.to_string_lossy()).unwrap();
+            ok += 1;
+        }
+    }
+    println!("thumbnails cached: {ok}");
+
+    let feed_rows = db.list_feed(&FeedFilter::default()).unwrap();
+    println!("feed rows now: {}", feed_rows.len());
+    for i in feed_rows.iter().take(3) {
+        println!("  [{}] {}", i.channel_title, i.title);
+    }
+}