Floatplane channel plugin for Jellyfin 10.10.x: browse, HLS proxy, cookie session, CI release

- IChannel: creators -> sub-channels -> video posts (public listing API, search mapped)
- IRequiresMediaInfoCallback -> signed proxy URLs; stream controller rewrites HLS so the
  AES-128 key is fetched server-side with the session cookie, segments stay on the CDN
- delivery/info cached per token lifetime and throttled (~2/min)
- config page: paste sails.sid + validate, extra creators, quality, search test
- scripts/package.sh -> plugin folder + zip + md5 + manifest.json; Gitea release workflow
- research docs, HAR analysis (HAR itself gitignored), install-pi5.sh

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

doc/research/reference-sources/fn_VideoPlayerManager.kt

@@ -0,0 +1,38 @@
+package com.coulterpeterson.floatnative.data
+
+import android.content.Context
+import androidx.annotation.OptIn
+import androidx.media3.common.MediaItem
+import androidx.media3.common.Player
+import androidx.media3.common.util.UnstableApi
+import androidx.media3.exoplayer.ExoPlayer
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.asStateFlow
+
+@OptIn(UnstableApi::class)
+class VideoPlayerManager(context: Context) {
+    private val _player = ExoPlayer.Builder(context).build()
+    val player: Player = _player
+
+    private val _isPlaying = MutableStateFlow(false)
+    val isPlaying = _isPlaying.asStateFlow()
+
+    init {
+        _player.addListener(object : Player.Listener {
+            override fun onIsPlayingChanged(isPlaying: Boolean) {
+                _isPlaying.value = isPlaying
+            }
+        })
+    }
+
+    fun playMedia(url: String) {
+        val mediaItem = MediaItem.fromUri(url)
+        _player.setMediaItem(mediaItem)
+        _player.prepare()
+        _player.play()
+    }
+
+    fun release() {
+        _player.release()
+    }
+}