One icon per meaning across the UI; mark everything read in All Subscriptions

- All Subscriptions' header checks every feed and marks everything read
  (POST /api/read-all, the same feeds the view lists); it asks first.
- Minus unsubscribes everywhere (the feed header's x read as "close"),
  x only closes or cancels, plus adds/subscribes/imports, and a dialog's
  confirm carries its action's icon. Remaining word buttons, the player
  and the folder arrow are Font Awesome 7.3.1 icons.
- Toolbar grouped by what it acts on (add, unsubscribe, scan | play,
  read, keep); read and keep show the selected item's state.
- The OPML subscription page uses the same header as a feed.
- Fixed: Escape ignored inside a dialog's text box (Add feed could not
  be closed with it), white password box in the dark theme, stray dot
  in an undated item's details.
- Tests: one action one icon across toolbar, page and all 8 dialogs;
  All Subscriptions mark everything read.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0173mGu6rK18Ne7UGTwAaVJV

src/web.rs

@@ -69,6 +69,7 @@ pub fn router(state: WebState) -> Router {
         .route("/api/entries/{feed_id}/{guid}/flags", post(set_flags))
         .route("/api/entries/{feed_id}/{guid}/position", post(set_position))
         .route("/api/feeds/{id}/read-all", post(read_all))
+        .route("/api/read-all", post(read_all_mine))
         .route("/api/feeds/{id}/download-latest", post(download_latest))
         .route("/api/enclosures/{id}/download", post(download_now))
         .route("/api/enclosures/{id}", delete(delete_file))
@@ -1260,6 +1261,18 @@ async fn read_all(
     Ok(Json(serde_json::json!({ "marked": n })))
 }
 
+/// Everything read in every feed you subscribe to: exactly what All Subscriptions lists, since
+/// that view is scoped by the same subscriptions.
+async fn read_all_mine(
+    State(state): State<WebState>,
+    user: crate::db::User,
+) -> Result<Json<serde_json::Value>, ApiError> {
+    let ids: Vec<String> =
+        state.ctx.db.subscriptions_for(user.id)?.into_iter().map(|s| s.feed_id).collect();
+    let n = state.ctx.db.mark_all_read(user.id, &ids)?;
+    Ok(Json(serde_json::json!({ "marked": n })))
+}
+
 #[derive(Deserialize)]
 struct HowMany {
     #[serde(default = "five")]