TUI: Zeichen am rechten Rand bei schmalen Terminals nicht mehr abgeschnitten

ContinuousBookViews vertikale Scrollbar reserviert 2 Spalten, die vorher
nicht aus der Wrap-Breite herausgerechnet wurden — der Text wurde also
2 Zeichen breiter gewrappt, als tatsächlich sichtbar war, wodurch die
Scrollbar die letzten 1-2 Buchstaben jeder Zeile überdeckt hat. Bei
schmalen Terminals (großer Font, wenig Spalten) war das besonders
auffällig, betraf strukturell aber jede Breite.

Fix: overflow-x: hidden (eine ungewollte horizontale Scrollbar hat
zusätzlich eine Zeile unten geklaut) + overflow-y: scroll (hält die
Scrollbar-Breite von Anfang an konstant, kein Rätselraten je nach
Inhaltsgröße) in book_view.py. reader_screen.py misst die Wrap-Breite
jetzt am Container statt an book_view selbst (vermeidet einen
Miss-nach-Einschränken-Zirkelbezug bei wiederholten Resizes) und rechnet
die feste Scrollbar-Breite (SCROLLBAR_GUTTER=2) heraus; beim Anwenden
des Layouts wird sie wieder daraufgerechnet, damit book_view.styles.width
weiterhin fürs Zentrieren passt.

Getestet: content_region-Breite stimmt jetzt exakt mit der Wrap-Breite
über sechs verschiedene Terminalbreiten (60-200 Spalten, inkl. des
120-Zeichen-Cap-Bereichs) überein — vorher lag sie durchgehend 2 Spalten
darunter. Voller Regressionstest (Scroll, Fußnote, Resize) läuft weiter
fehlerfrei.

tui/README.md

@@ -44,6 +44,9 @@ Tastenkürzel:
 Der Fließtext ist auf 120 Zeichen Breite begrenzt und horizontal zentriert (lesbarer als
 volle Terminalbreite bei breiten Fenstern).
 
+Unten rechts zeigt eine Statusleiste Akkustand (falls vorhanden, via `psutil`) und Uhrzeit,
+sekündlich aktualisiert, auf Bibliotheks- und Reader-Ansicht.
+
 Die Bibliotheksansicht ist nach zuletzt geöffnetem Buch sortiert (neueste zuerst; anhand
 des Zeitstempels der zuletzt gespeicherten Position), und blendet gelesene Bücher
 standardmäßig aus (`EBook.is_read` aus dem Sync-Snapshot, lokal in `library.json`

tui/diora_tui/app.py

@@ -17,6 +17,7 @@ from textual.widgets import Footer, Header, Label, ListItem, ListView
 from . import config as config_mod
 from . import crypto, epub, library_meta, progress, remote
 from .reader_screen import ReaderScreen
+from .statusbar import StatusBar
 
 DEFAULT_LIBRARY = Path.home() / "Books"
 
@@ -38,6 +39,7 @@ class LibraryScreen(Screen):
     def compose(self) -> ComposeResult:
         yield Header()
         yield ListView(id="library-list")
+        yield StatusBar()
         yield Footer()
 
     def on_mount(self) -> None:

tui/diora_tui/app.tcss

@@ -2,6 +2,15 @@
     height: 1fr;
 }
 
+StatusBar {
+    dock: bottom;
+    height: 1;
+    padding: 0 1;
+    background: $panel;
+    color: $text-muted;
+    text-align: right;
+}
+
 #reader-scroll {
     height: 1fr;
     padding: 1 2;

tui/diora_tui/book_view.py

@@ -15,6 +15,18 @@ from .layout import BookLayout
 
 
 class ContinuousBookView(ScrollView):
+    # We always wrap text to fit exactly, so a horizontal scrollbar should
+    # never be needed — and "scroll" (not "auto") for the vertical one keeps
+    # its gutter reserved from the very first (still-empty) layout pass, so
+    # the width we wrap text at later never has to guess whether a scrollbar
+    # will appear and steal columns out from under already-wrapped lines.
+    DEFAULT_CSS = """
+    ContinuousBookView {
+        overflow-x: hidden;
+        overflow-y: scroll;
+    }
+    """
+
     def __init__(self, book_layout: BookLayout) -> None:
         super().__init__()
         self.book_layout = book_layout
@@ -24,6 +36,7 @@ class ContinuousBookView(ScrollView):
         _scroll_x, scroll_y = self.scroll_offset
         row = scroll_y + y
         strips = self.book_layout.row_strips
+        width = self.scrollable_content_region.width
         if row < 0 or row >= len(strips):
-            return Strip.blank(self.size.width, self.rich_style)
+            return Strip.blank(width, self.rich_style)
-        return strips[row].crop_extend(0, self.size.width, self.rich_style)
+        return strips[row].crop_extend(0, width, self.rich_style)

tui/diora_tui/reader_screen.py

@@ -25,9 +25,15 @@ from textual.widgets import Footer, Header, Label, LoadingIndicator, Static
 
 from . import api, blocks, cache, config as config_mod, layout, progress
 from .book_view import ContinuousBookView
+from .statusbar import StatusBar
 
 MAX_LINE_WIDTH = 120
 AUTOSAVE_INTERVAL = 5.0
+# ContinuousBookView forces its vertical scrollbar always-on (see book_view.py)
+# so this stays constant — measuring the container's width and subtracting
+# this fixed amount avoids a measure-after-constrain race against book_view's
+# own (possibly already-constrained-from-a-previous-layout) width.
+SCROLLBAR_GUTTER = 2
 
 _EMPTY_LAYOUT = layout.BookLayout(starts=[], heights=[], row_strips=[], total_rows=0, width=1)
 
@@ -80,7 +86,8 @@ class ReaderScreen(Screen):
     def compose(self):
         yield Header()
         yield LoadingIndicator(id="reader-loading")
-        with Container(id="reader-scroll"):
+        with Container(id="reader-scroll") as scroll_container:
+            self._scroll_container = scroll_container
             # Stays visible (empty) from the start rather than toggling display
             # on once loaded — a widget that's just been switched from hidden
             # to visible hasn't been through a layout pass yet, so its `.size`
@@ -88,9 +95,21 @@ class ReaderScreen(Screen):
             # nothing to clamp against and silently resets to 0.
             self._book_view = ContinuousBookView(_EMPTY_LAYOUT)
             yield self._book_view
+        yield StatusBar()
         yield Footer()
 
     def on_mount(self) -> None:
+        # Deferred rather than read synchronously here: right after mount the
+        # container hasn't been through a layout pass yet, so its size isn't
+        # reliable — same lesson as the scroll-restore race below.
+        self.call_after_refresh(self._start_loading)
+
+    def _start_loading(self) -> None:
+        if self._scroll_container.size.width == 0:
+            # Not sized yet after all — keep deferring instead of guessing a
+            # fixed number of refresh cycles (mirrors _restore_position below).
+            self.call_after_refresh(self._start_loading)
+            return
         self._load_book(self._content_width())
 
     @work(thread=True)
@@ -114,11 +133,21 @@ class ReaderScreen(Screen):
         self.set_interval(AUTOSAVE_INTERVAL, self._autosave)
 
     def _content_width(self) -> int:
-        return max(20, min(MAX_LINE_WIDTH, self.size.width - 4))
+        # Measuring the *container* rather than book_view's own size avoids a
+        # measure-after-constrain race: once a layout has been applied,
+        # book_view's width is pinned to a previous value via styles.width
+        # (below), so re-measuring book_view itself on a later resize would
+        # just read that stale pinned width back instead of the new
+        # available space. The container's width is unaffected by that.
+        available = self._scroll_container.size.width - SCROLLBAR_GUTTER
+        return max(20, min(MAX_LINE_WIDTH, available))
 
     def _apply_layout(self, book_layout: layout.BookLayout, width: int) -> None:
         self.book_layout = book_layout
-        self._book_view.styles.width = width
+        # Pin book_view's outer width to content-width-plus-scrollbar so its
+        # *inner* content region (what render_line actually draws into) ends
+        # up exactly `width` — matching what block texts were wrapped at.
+        self._book_view.styles.width = width + SCROLLBAR_GUTTER
         self._book_view.book_layout = book_layout
         self._book_view.virtual_size = Size(width, book_layout.total_rows)
         self._book_view.refresh()

tui/diora_tui/statusbar.py

@@ -0,0 +1,44 @@
+"""Bottom status bar: battery level + current time, refreshed every second.
+Battery is read via psutil (cross-platform); on a desktop machine with no
+battery, psutil.sensors_battery() returns None and the bar just shows time.
+"""
+
+from __future__ import annotations
+
+from datetime import datetime
+
+from textual.widgets import Static
+
+try:
+    import psutil
+except ImportError:
+    psutil = None  # battery display degrades gracefully to time-only
+
+
+class StatusBar(Static):
+    def on_mount(self) -> None:
+        self._refresh()
+        self.set_interval(1.0, self._refresh)
+
+    def _refresh(self) -> None:
+        self.update(self._render_text())
+
+    def _render_text(self) -> str:
+        parts = []
+        battery = self._battery_text()
+        if battery:
+            parts.append(battery)
+        parts.append(datetime.now().strftime("%H:%M:%S"))
+        return "  ".join(parts)
+
+    def _battery_text(self) -> str | None:
+        if psutil is None:
+            return None
+        try:
+            battery = psutil.sensors_battery()
+        except Exception:
+            return None
+        if battery is None:
+            return None
+        state = "lädt" if battery.power_plugged else "Akku"
+        return f"{state} {round(battery.percent)}%"

tui/pyproject.toml

@@ -11,6 +11,7 @@ dependencies = [
     "platformdirs>=4.0",
     "requests>=2.31",
     "cryptography>=42.0",
+    "psutil>=5.9",
 ]
 
 [project.scripts]