Convert PocketBase dates to Berlin time; document code conventions

CLAUDE.md

@@ -83,11 +83,41 @@ Inhalt liegt in PocketBase (`pb_data`), das separat gesichert wird (siehe
 - Datenzugriff über den typisierten `PocketBaseClient` (registriert via
   `AddHttpClient`), der pro Request liest — kein Start-Cache, kein Singleton mit
   Inhalten. Komponenten liegen feature-basiert unter `Features/<Bereich>/`.
-- Öffentliche Typen und Methoden im `PocketBaseClient` und in `Contracts`
-  bekommen XML-Doc (auf Englisch, leicht verständlich), Razor-Markup nicht.
 - **Code durchgängig auf Englisch** — Typen, Member, Variablen, Kommentare,
   Skripte und Doku. Das gilt **auch für Domänenbegriffe**: im Code `Event`, nicht
   `Termin`; `Post`, nicht `Beitrag`. Deutsch bleibt ausschließlich, was ein
   Besucher liest oder ein Redakteur pflegt: UI-Texte sowie die **Werte** der
   PocketBase-Records (z. B. `title: Vorstandsteam`, der Markdown-`body`). Die
   Feldnamen und Slugs bleiben dagegen englisch (`title`, `slug`, `/board`).
+
+## Coding Convention
+
+- **Ausdruckskörper (`=>`) sind Pflicht, wo syntaktisch möglich** — Methoden,
+  Properties, Konstruktoren, Operatoren, lokale Funktionen. Ein `if/else`, das
+  einen Wert liefert, wird zum ternären Ausdruck oder zur `switch`-Expression, kein
+  Block-Körper mit `return`. Ein Block-Körper nur, wo ein Ausdruck sprachlich nicht
+  geht (mehrere Anweisungen ohne Rückgabe, `ref`/`out`, `yield`).
+- Ternäre und `switch`-Expressions dürfen dafür mehrzeilig umgebrochen werden;
+  Lesbarkeit entsteht durch Einrückung, nicht durch einen Block.
+- Nullable aktiv nutzen: `?`, `??`, `??=` statt Nullprüfungen im Block. Ein
+  ungültiger `null`-Fall wird als Ausdruck geworfen (`?? throw new …`).
+- Argumente/Rückgaben früh und knapp validieren, bevorzugt als Ausdruck.
+
+## Documentation Convention
+
+Vorbild ist `Elternbeirat.PocketBase/LocalDateTimeConverter.cs` — daran
+ausrichten.
+
+- **Jeder öffentliche (`public`/`protected`) Typ und Member bekommt XML-Doc** —
+  nicht nur `PocketBaseClient` und `Contracts`. Interne Helfer, die Teil der
+  fachlichen Erklärung sind (wie `WallClock`), ebenfalls. Razor-Markup nicht.
+- Voller Umfang, wo zutreffend: `<summary>`, dazu `<param>`, `<returns>`,
+  `<exception>` (jede geworfene Bedingung), `<remarks>` für Kontext/Fallstricke,
+  `<example>` mit `<code>` für nicht offensichtliche Nutzung, `<seealso>` auf
+  verwandte Typen. `<inheritdoc/>` bei Interface-/Basis-Implementierungen.
+- Code im Text als Markup referenzieren, nicht als Prosa: `<see cref="…"/>`,
+  `<see langword="null"/>`/`<see langword="false"/>`, `<c>…</c>` für Literale.
+- Einrückung: der Textinhalt steht mit vier Leerzeichen unter dem `///`-Tag
+  (`///     Text`), Tags sauber verschachtelt.
+- Englisch, leicht verständlich, erklärt **warum**, nicht was der Code ohnehin
+  zeigt.

Elternbeirat.Contracts/Event.cs

@@ -2,38 +2,68 @@ using System.Text.Json.Serialization;
 
 namespace Elternbeirat.Contracts;
 
-/// <summary>A calendar entry. Sorted by <see cref="Start"/>.</summary>
+/// <summary>
+///     A calendar entry of the Elternbeirat, as stored in PocketBase.
+/// </summary>
+/// <remarks>
+///     Event lists are ordered by <see cref="Start"/>. Unset optional text fields are
+///     <see cref="string.Empty"/>, never <see langword="null"/>.
+/// </remarks>
 public record Event
 {
-    /// <summary>PocketBase record id.</summary>
+    /// <summary>
+    ///     Gets the PocketBase record id.
+    /// </summary>
     [JsonPropertyName("id")]
     public string Id { get; init; } = "";
 
     /// <summary>
-    /// Start of the event with date and time. Stored as UTC by PocketBase but
+    ///     Gets the start of the event as Europe/Berlin wall-clock time.
-    /// read as local time (Europe/Berlin) by convention. An all-day event uses
-    /// 00:00 as the time.
     /// </summary>
+    /// <remarks>
+    ///     PocketBase stores the value in UTC; it is converted to Berlin local time on
+    ///     deserialization, with daylight saving applied. An all-day event uses 00:00
+    ///     as the time.
+    /// </remarks>
     [JsonPropertyName("start")]
     public DateTime Start { get; init; }
 
-    /// <summary>Optional end of the event; null when unset.</summary>
+    /// <summary>
+    ///     Gets the optional end of the event as Europe/Berlin wall-clock time.
+    /// </summary>
+    /// <value>
+    ///     The end time, or <see langword="null"/> if the event has no end.
+    /// </value>
     [JsonPropertyName("end")]
     public DateTime? End { get; init; }
 
-    /// <summary>Event name, e.g. "Elternbeiratssitzung".</summary>
+    /// <summary>
+    ///     Gets the event name, e.g. <c>"Elternbeiratssitzung"</c>.
+    /// </summary>
     [JsonPropertyName("title")]
     public string Title { get; init; } = "";
 
-    /// <summary>Optional location, e.g. "Aula".</summary>
+    /// <summary>
+    ///     Gets the optional location, e.g. <c>"Aula"</c>.
+    /// </summary>
+    /// <value>
+    ///     The location, or <see cref="string.Empty"/> if none is set.
+    /// </value>
     [JsonPropertyName("location")]
     public string Location { get; init; } = "";
 
-    /// <summary>Optional note, e.g. "Anmeldung erforderlich".</summary>
+    /// <summary>
+    ///     Gets the optional note, e.g. <c>"Anmeldung erforderlich"</c>.
+    /// </summary>
+    /// <value>
+    ///     The note, or <see cref="string.Empty"/> if none is set.
+    /// </value>
     [JsonPropertyName("note")]
     public string Note { get; init; } = "";
 
-    /// <summary>Whether the event is visible to visitors.</summary>
+    /// <summary>
+    ///     Gets a value indicating whether the event is visible to visitors of the site.
+    /// </summary>
     [JsonPropertyName("public")]
     public bool Public { get; init; }
 }

Elternbeirat.Contracts/Faq.cs

@@ -3,27 +3,40 @@ using System.Text.Json.Serialization;
 namespace Elternbeirat.Contracts;
 
 /// <summary>
-/// A single question and answer, grouped on the FAQ page by <see cref="Topic"/>.
+///     A single question and answer of the FAQ, as stored in PocketBase.
 /// </summary>
+/// <remarks>
+///     On the FAQ page, entries are grouped by <see cref="Topic"/>.
+/// </remarks>
 public record Faq
 {
-    /// <summary>PocketBase record id.</summary>
+    /// <summary>
+    ///     Gets the PocketBase record id.
+    /// </summary>
     [JsonPropertyName("id")]
     public string Id { get; init; } = "";
 
-    /// <summary>The question as a parent would phrase it.</summary>
+    /// <summary>
+    ///     Gets the question as a parent would phrase it.
+    /// </summary>
     [JsonPropertyName("question")]
     public string Question { get; init; } = "";
 
-    /// <summary>The answer in Markdown.</summary>
+    /// <summary>
+    ///     Gets the answer as Markdown.
+    /// </summary>
     [JsonPropertyName("answer")]
     public string Answer { get; init; } = "";
 
-    /// <summary>Topic the question is grouped under, e.g. "mensa".</summary>
+    /// <summary>
+    ///     Gets the topic the question is grouped under, e.g. <c>"mensa"</c>.
+    /// </summary>
     [JsonPropertyName("topic")]
     public string Topic { get; init; } = "";
 
-    /// <summary>Whether the question is visible to visitors.</summary>
+    /// <summary>
+    ///     Gets a value indicating whether the question is visible to visitors of the site.
+    /// </summary>
     [JsonPropertyName("public")]
     public bool Public { get; init; }
 }

Elternbeirat.Contracts/Page.cs

@@ -3,45 +3,77 @@ using System.Text.Json.Serialization;
 namespace Elternbeirat.Contracts;
 
 /// <summary>
-/// A content page. Pages also drive the site navigation: <see cref="Location"/>
+///     A content page of the site, as stored in PocketBase.
-/// and <see cref="Order"/> decide where and in which order a page appears in the
-/// header or footer menu, and <see cref="Embed"/> lists dynamic blocks (posts,
-/// events, faqs) rendered below the page body.
 /// </summary>
+/// <remarks>
+///     Pages also drive the site navigation: <see cref="Location"/> and
+///     <see cref="Order"/> decide where and in which order a page appears in the
+///     header or footer menu. <see cref="Embed"/> lists dynamic blocks rendered
+///     below the page body.
+/// </remarks>
 public record Page
 {
-    /// <summary>PocketBase record id.</summary>
+    /// <summary>
+    ///     Gets the PocketBase record id.
+    /// </summary>
     [JsonPropertyName("id")]
     public string Id { get; init; } = "";
 
-    /// <summary>Heading shown to visitors; may contain umlauts and spaces.</summary>
+    /// <summary>
+    ///     Gets the heading shown to visitors.
+    /// </summary>
+    /// <remarks>
+    ///     Free text; may contain umlauts and spaces. For the URL, see <see cref="Slug"/>.
+    /// </remarks>
     [JsonPropertyName("title")]
     public string Title { get; init; } = "";
 
-    /// <summary>Page body in Markdown.</summary>
+    /// <summary>
+    ///     Gets the page body as Markdown.
+    /// </summary>
     [JsonPropertyName("body")]
     public string Body { get; init; } = "";
 
-    /// <summary>Where the page appears in the navigation: "header" or "footer".</summary>
+    /// <summary>
+    ///     Gets the navigation menu the page appears in.
+    /// </summary>
+    /// <value>
+    ///     Either <c>"header"</c> or <c>"footer"</c>.
+    /// </value>
     [JsonPropertyName("location")]
     public string Location { get; init; } = "";
 
-    /// <summary>Sort order within its navigation location; smaller is earlier.</summary>
+    /// <summary>
+    ///     Gets the sort order within the navigation menu given by <see cref="Location"/>.
+    /// </summary>
+    /// <value>
+    ///     The sort key; pages with smaller values appear first.
+    /// </value>
     [JsonPropertyName("order")]
     public double Order { get; init; }
 
-    /// <summary>URL slug (lowercase, no umlauts), e.g. "board" -> /board.</summary>
+    /// <summary>
+    ///     Gets the URL slug of the page, e.g. <c>"board"</c> for <c>/board</c>.
+    /// </summary>
+    /// <value>
+    ///     A lowercase path segment without umlauts.
+    /// </value>
     [JsonPropertyName("slug")]
     public string Slug { get; init; } = "";
 
     /// <summary>
-    /// Dynamic blocks to render below the body: any of "posts", "events", "faqs".
+    ///     Gets the dynamic blocks rendered below the <see cref="Body"/>.
-    /// Empty for a plain text page.
     /// </summary>
+    /// <value>
+    ///     Any of <c>"posts"</c>, <c>"events"</c> and <c>"faqs"</c>, or an empty list
+    ///     for a plain text page.
+    /// </value>
     [JsonPropertyName("embed")]
     public IReadOnlyList<string> Embed { get; init; } = [];
 
-    /// <summary>Whether the page is visible to visitors.</summary>
+    /// <summary>
+    ///     Gets a value indicating whether the page is visible to visitors of the site.
+    /// </summary>
     [JsonPropertyName("public")]
     public bool Public { get; init; }
 }

Elternbeirat.Contracts/Post.cs

@@ -2,33 +2,57 @@ using System.Text.Json.Serialization;
 
 namespace Elternbeirat.Contracts;
 
-/// <summary>A news post. Sorted by <see cref="Date"/>, newest first.</summary>
+/// <summary>
+///     A news post of the site, as stored in PocketBase.
+/// </summary>
+/// <remarks>
+///     Post lists are ordered by <see cref="Date"/>, newest first.
+/// </remarks>
 public record Post
 {
-    /// <summary>PocketBase record id.</summary>
+    /// <summary>
+    ///     Gets the PocketBase record id.
+    /// </summary>
     [JsonPropertyName("id")]
     public string Id { get; init; } = "";
 
     /// <summary>
-    /// Publication date. Stored as UTC by PocketBase but read as local time
+    ///     Gets the publication date as Europe/Berlin wall-clock time.
-    /// (Europe/Berlin) by convention; only the date part is shown.
     /// </summary>
+    /// <remarks>
+    ///     PocketBase stores the value in UTC; it is converted to Berlin local time on
+    ///     deserialization, with daylight saving applied. Only the date part is shown.
+    /// </remarks>
     [JsonPropertyName("date")]
     public DateTime Date { get; init; }
 
-    /// <summary>Post heading shown to visitors; may contain umlauts and spaces.</summary>
+    /// <summary>
+    ///     Gets the heading shown to visitors.
+    /// </summary>
+    /// <remarks>
+    ///     Free text; may contain umlauts and spaces. For the URL, see <see cref="Slug"/>.
+    /// </remarks>
     [JsonPropertyName("title")]
     public string Title { get; init; } = "";
 
-    /// <summary>Post body in Markdown.</summary>
+    /// <summary>
+    ///     Gets the post body as Markdown.
+    /// </summary>
     [JsonPropertyName("body")]
     public string Body { get; init; } = "";
 
-    /// <summary>URL slug (lowercase, no umlauts), e.g. "herbstbasar" -> /posts/herbstbasar.</summary>
+    /// <summary>
+    ///     Gets the URL slug of the post, e.g. <c>"herbstbasar"</c> for <c>/posts/herbstbasar</c>.
+    /// </summary>
+    /// <value>
+    ///     A lowercase path segment without umlauts.
+    /// </value>
     [JsonPropertyName("slug")]
     public string Slug { get; init; } = "";
 
-    /// <summary>Whether the post is visible to visitors.</summary>
+    /// <summary>
+    ///     Gets a value indicating whether the post is visible to visitors of the site.
+    /// </summary>
     [JsonPropertyName("public")]
     public bool Public { get; init; }
 }

Elternbeirat.PocketBase/LocalDateTimeConverter.cs

@@ -5,71 +5,127 @@ using System.Text.Json.Serialization;
 namespace Elternbeirat.PocketBase;
 
 /// <summary>
-/// Shared parsing of a PocketBase date string as wall-clock time. The trailing
+///     Converts between PocketBase date strings and Europe/Berlin wall-clock time.
-/// "Z" is stripped rather than honoured, so the number is taken at face value and
-/// the result carries <see cref="DateTimeKind.Unspecified"/> -- no timezone shift.
 /// </summary>
+/// <remarks>
+///     PocketBase stores every date in UTC and serializes it with a trailing <c>Z</c>
+///     (e.g. <c>"2026-10-08 17:30:00.000Z"</c>). The values produced here are local
+///     wall-clock numbers: an editor who typed 19:30 in the admin form gets 19:30 back,
+///     with daylight saving applied by the time zone. They carry
+///     <see cref="DateTimeKind.Unspecified"/> so that no later formatting shifts them again.
+/// </remarks>
 internal static class WallClock
 {
-    public static DateTime Parse(string raw)
+    /// <summary>
-    {
+    ///     IANA id; resolves on every platform .NET supports, Windows included.
-        // Drop a trailing "Z" so DateTime.Parse does not treat the value as UTC
+    /// </summary>
-        // and convert it to local time (which would shift 19:30 to 20:30/21:30).
+    private static readonly TimeZoneInfo Berlin =
-        var value = raw.EndsWith('Z') ? raw[..^1] : raw;
+        TimeZoneInfo.FindSystemTimeZoneById("Europe/Berlin");
-        var parsed = DateTime.Parse(value, CultureInfo.InvariantCulture,
+
-            DateTimeStyles.None);
+    /// <summary>
-        return DateTime.SpecifyKind(parsed, DateTimeKind.Unspecified);
+    ///     Parses a PocketBase UTC date string into Berlin wall-clock time.
-    }
+    /// </summary>
+    /// <param name="raw">
+    ///     The raw PocketBase value; may be <see langword="null"/> or empty.
+    /// </param>
+    /// <returns>
+    ///     The Berlin wall-clock time with <see cref="DateTimeKind.Unspecified"/>, or
+    ///     <see langword="null"/> if <paramref name="raw"/> is <see langword="null"/> or empty
+    ///     (PocketBase's representation of an unset date).
+    /// </returns>
+    /// <exception cref="FormatException">
+    ///     <paramref name="raw"/> is not a valid date string.
+    /// </exception>
+    public static DateTime? Parse(string? raw) =>
+        string.IsNullOrEmpty(raw)
+            ? null
+            : TimeZoneInfo.ConvertTime(
+                DateTimeOffset.Parse(raw, CultureInfo.InvariantCulture), Berlin).DateTime;
+
+    /// <summary>
+    ///     Formats a Berlin wall-clock time as the UTC string PocketBase stores.
+    ///     Inverse of <see cref="Parse"/>.
+    /// </summary>
+    /// <param name="berlin">
+    ///     A Berlin wall-clock time. Its <see cref="DateTime.Kind"/> is ignored, and the
+    ///     value is always interpreted as Berlin local time.
+    /// </param>
+    /// <returns>
+    ///     The UTC value in PocketBase format, e.g. <c>"2026-10-08 17:30:00.000Z"</c>.
+    /// </returns>
+    /// <exception cref="ArgumentException">
+    ///     <paramref name="berlin"/> does not exist in Berlin, because it falls in the
+    ///     daylight-saving gap in spring.
+    /// </exception>
+    public static string Format(DateTime berlin) =>
+        TimeZoneInfo.ConvertTimeToUtc(DateTime.SpecifyKind(berlin, DateTimeKind.Unspecified), Berlin)
+            .ToString("yyyy-MM-dd HH:mm:ss.fff'Z'", CultureInfo.InvariantCulture);
 }
 
 /// <summary>
-/// Reads PocketBase date values as local wall-clock time.
+///     JSON converter that reads and writes PocketBase dates as Europe/Berlin
-/// <para>
+///     wall-clock <see cref="DateTime"/> values.
-/// PocketBase stores every date in UTC and serializes it with a trailing "Z"
-/// (e.g. "2026-10-08 19:30:00.000Z"). By project convention the stored number
-/// IS the local time (Europe/Berlin) and the "Z" is ignored -- see the timezone
-/// decision in the data model. This converter therefore parses the value and
-/// returns it as an <see cref="DateTimeKind.Unspecified"/> instant, so no
-/// timezone shift is ever applied when the value is later formatted.
-/// </para>
 /// </summary>
+/// <remarks>
+///     An empty string (unset date) is read as <see langword="default"/>(<see cref="DateTime"/>).
+///     For optional dates, use <see cref="NullableLocalDateTimeConverter"/> instead.
+/// </remarks>
+/// <example>
+/// <code>
+///     [JsonConverter(typeof(LocalDateTimeConverter))]
+///     public DateTime Start { get; init; }
+/// </code>
+/// </example>
+/// <seealso cref="WallClock"/>
 public sealed class LocalDateTimeConverter : JsonConverter<DateTime>
 {
-    public override DateTime Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+    /// <inheritdoc/>
-    {
+    public override DateTime Read(
-        var raw = reader.GetString();
+        ref Utf8JsonReader reader,
-        return string.IsNullOrEmpty(raw) 
+        Type typeToConvert,
-            ? default 
+        JsonSerializerOptions options)
-            : WallClock.Parse(raw);
+        => WallClock.Parse(reader.GetString()) ?? default;
-    }
 
-    public override void Write(Utf8JsonWriter writer, DateTime value, JsonSerializerOptions options)
+    /// <inheritdoc/>
-        => writer.WriteStringValue(value.ToString("yyyy-MM-dd HH:mm:ss.fff'Z'",
+    public override void Write(
-            CultureInfo.InvariantCulture));
+        Utf8JsonWriter writer,
+        DateTime value,
+        JsonSerializerOptions options)
+        => writer.WriteStringValue(WallClock.Format(value));
 }
 
 /// <summary>
-/// Nullable counterpart of <see cref="LocalDateTimeConverter"/>. PocketBase sends
+///     JSON converter that reads and writes optional PocketBase dates as Europe/Berlin
-/// an empty string for an unset optional date (e.g. an event without an end);
+///     wall-clock <see cref="DateTime"/> values.
-/// that maps to null.
 /// </summary>
+/// <remarks>
+///     PocketBase sends an empty string for an unset optional date (e.g. an event
+///     without an end). This value, like JSON <c>null</c>, is read as <see langword="null"/>.
+/// </remarks>
+/// <example>
+/// <code>
+///     [JsonConverter(typeof(NullableLocalDateTimeConverter))]
+///     public DateTime? End { get; init; }
+/// </code>
+/// </example>
+/// <seealso cref="WallClock"/>
 public sealed class NullableLocalDateTimeConverter : JsonConverter<DateTime?>
 {
-    public override DateTime? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+    /// <inheritdoc/>
-    {
+    public override DateTime? Read(
-        var raw = reader.GetString();
+        ref Utf8JsonReader reader,
-        if (string.IsNullOrEmpty(raw))
+        Type typeToConvert,
-            return null;
+        JsonSerializerOptions options)
+        => WallClock.Parse(reader.GetString());
 
-        return WallClock.Parse(raw);
+    /// <inheritdoc/>
-    }
+    /// <remarks>
-
+    ///     Only called for non-null values: <see cref="JsonConverter{T}.HandleNull"/> is
-    public override void Write(Utf8JsonWriter writer, DateTime? value, JsonSerializerOptions options)
+    ///     <see langword="false"/>, so the serializer writes <see langword="null"/> itself.
-    {
+    /// </remarks>
-        if (value is null)
+    public override void Write(
-            writer.WriteStringValue("");
+        Utf8JsonWriter writer,
-        else
+        DateTime? value,
-            writer.WriteStringValue(value.Value.ToString("yyyy-MM-dd HH:mm:ss.fff'Z'",
+        JsonSerializerOptions options)
-                CultureInfo.InvariantCulture));
+        => writer.WriteStringValue(WallClock.Format(value ?? throw new ArgumentNullException(nameof(value))));
-    }
 }

Elternbeirat.PocketBase/PocketBaseClient.cs

@@ -6,18 +6,88 @@ namespace Elternbeirat.PocketBase;
 
 /// <summary>
 ///     Reads published content from a PocketBase instance over its REST API.
-/// <para>
-/// One method per collection (pages, posts, events, faqs). Each returns only
-/// records with <c>public = true</c> and lets PocketBase do the filtering and
-/// sorting via query parameters. The <see cref="HttpClient"/> is expected to have
-/// its <see cref="HttpClient.BaseAddress"/> set to the PocketBase base URL, so it
-/// is registered as a typed client via <c>AddHttpClient</c>.
-/// </para>
 /// </summary>
+/// <remarks>
+///     <para>
+///         There is one method per collection (pages, posts, events, faqs). Each returns
+///         only records with <c>public = true</c> and leaves filtering and sorting to
+///         PocketBase via query parameters.
+///     </para>
+///     <para>
+///         Register the class as a typed client via <c>AddHttpClient</c>, with
+///         <see cref="HttpClient.BaseAddress"/> set to the PocketBase base URL.
+///     </para>
+/// </remarks>
+/// <param name="http">
+///     The HTTP client; its <see cref="HttpClient.BaseAddress"/> must point to PocketBase.
+/// </param>
 public sealed class PocketBaseClient(HttpClient http)
 {
+    /// <summary>
+    ///     Serializer options that map PocketBase UTC dates to Berlin wall-clock time.
+    /// </summary>
     private static readonly JsonSerializerOptions JsonOptions = CreateJsonOptions();
 
+    /// <summary>
+    ///     Gets all public pages, ordered by <see cref="Page.Order"/>.
+    /// </summary>
+    /// <param name="ct">
+    ///     A token to cancel the request.
+    /// </param>
+    /// <returns>
+    ///     The public pages, or an empty list if there are none.
+    /// </returns>
+    /// <exception cref="HttpRequestException">
+    ///     PocketBase could not be reached or returned a non-success status code.
+    /// </exception>
+    /// <exception cref="JsonException">
+    ///     The response could not be deserialized.
+    /// </exception>
+    /// <exception cref="OperationCanceledException">
+    ///     <paramref name="ct"/> was canceled or the request timed out.
+    /// </exception>
+    public Task<IReadOnlyList<Page>> GetPagesAsync(CancellationToken ct = default)
+        => GetRecordsAsync<Page>("pages", "order", ct);
+
+    /// <summary>
+    ///     Gets all public posts, ordered by <see cref="Post.Date"/>, newest first.
+    /// </summary>
+    /// <inheritdoc cref="GetPagesAsync" path="/param"/>
+    /// <returns>
+    ///     The public posts, or an empty list if there are none.
+    /// </returns>
+    /// <inheritdoc cref="GetPagesAsync" path="/exception"/>
+    public Task<IReadOnlyList<Post>> GetPostsAsync(CancellationToken ct = default)
+        => GetRecordsAsync<Post>("posts", "-date", ct);
+
+    /// <summary>
+    ///     Gets all public events, ordered by <see cref="Event.Start"/>, earliest first.
+    /// </summary>
+    /// <inheritdoc cref="GetPagesAsync" path="/param"/>
+    /// <returns>
+    ///     The public events, or an empty list if there are none.
+    /// </returns>
+    /// <inheritdoc cref="GetPagesAsync" path="/exception"/>
+    public Task<IReadOnlyList<Event>> GetEventsAsync(CancellationToken ct = default)
+        => GetRecordsAsync<Event>("events", "start", ct);
+
+    /// <summary>
+    ///     Gets all public FAQ entries, ordered by <see cref="Faq.Topic"/>.
+    /// </summary>
+    /// <inheritdoc cref="GetPagesAsync" path="/param"/>
+    /// <returns>
+    ///     The public FAQ entries, or an empty list if there are none.
+    /// </returns>
+    /// <inheritdoc cref="GetPagesAsync" path="/exception"/>
+    public Task<IReadOnlyList<Faq>> GetFaqsAsync(CancellationToken ct = default)
+        => GetRecordsAsync<Faq>("faqs", "topic", ct);
+
+    /// <summary>
+    ///     Creates the serializer options with both wall-clock date converters registered.
+    /// </summary>
+    /// <returns>
+    ///     The configured options.
+    /// </returns>
     private static JsonSerializerOptions CreateJsonOptions()
     {
         var options = new JsonSerializerOptions
@@ -29,23 +99,28 @@ public sealed class PocketBaseClient(HttpClient http)
         return options;
     }
 
-    /// <summary>Gets all public pages, ordered for navigation.</summary>
+    /// <summary>
-    public Task<IReadOnlyList<Page>> GetPagesAsync(CancellationToken ct = default)
+    ///     Gets all public records of a collection in a single request.
-        => GetRecordsAsync<Page>("pages", "order", ct);
+    /// </summary>
-
+    /// <typeparam name="T">
-    /// <summary>Gets all public posts, newest first.</summary>
+    ///     The record type to deserialize into.
-    public Task<IReadOnlyList<Post>> GetPostsAsync(CancellationToken ct = default)
+    /// </typeparam>
-        => GetRecordsAsync<Post>("posts", "-date", ct);
+    /// <param name="collection">
-
+    ///     The PocketBase collection name, e.g. <c>"posts"</c>.
-    /// <summary>Gets all public events, earliest start first.</summary>
+    /// </param>
-    public Task<IReadOnlyList<Event>> GetEventsAsync(CancellationToken ct = default)
+    /// <param name="sort">
-        => GetRecordsAsync<Event>("events", "start", ct);
+    ///     The PocketBase sort expression; a leading <c>-</c> sorts descending.
-
+    /// </param>
-    /// <summary>Gets all public FAQ entries.</summary>
+    /// <param name="ct">
-    public Task<IReadOnlyList<Faq>> GetFaqsAsync(CancellationToken ct = default)
+    ///     A token to cancel the request.
-        => GetRecordsAsync<Faq>("faqs", "topic", ct);
+    /// </param>
-
+    /// <returns>
-    private async Task<IReadOnlyList<T>> GetRecordsAsync<T>(string collection, string sort, CancellationToken ct)
+    ///     The public records, or an empty list if there are none.
+    /// </returns>
+    private async Task<IReadOnlyList<T>> GetRecordsAsync<T>(
+        string collection,
+        string sort,
+        CancellationToken ct)
     {
         // filter=public=true keeps drafts out; perPage is large enough to fetch
         // every record in a single page given the small content volume.

Elternbeirat.PocketBase/RecordList.cs

@@ -3,13 +3,25 @@ using System.Text.Json.Serialization;
 namespace Elternbeirat.PocketBase;
 
 /// <summary>
-/// The envelope PocketBase wraps a records list response in. Only <see cref="Items"/>
+///     The envelope PocketBase wraps a records list response in.
-/// is used; the paging fields are ignored because content volumes are small and the
-/// client requests a large page size in a single call.
 /// </summary>
-/// <typeparam name="T">The record type inside <c>items</c>.</typeparam>
+/// <remarks>
+///     Only <see cref="Items"/> is mapped. The paging fields (<c>page</c>,
+///     <c>perPage</c>, <c>totalItems</c>, <c>totalPages</c>) are ignored, because
+///     content volumes are small and <see cref="PocketBaseClient"/> fetches every
+///     record in a single request.
+/// </remarks>
+/// <typeparam name="T">
+///     The record type inside <c>items</c>.
+/// </typeparam>
 internal sealed record RecordList<T>
 {
+    /// <summary>
+    ///     Gets the records of the requested page.
+    /// </summary>
+    /// <value>
+    ///     The records, or an empty list if the collection has no matching records.
+    /// </value>
     [JsonPropertyName("items")]
     public IReadOnlyList<T> Items { get; init; } = [];
 }

Elternbeirat.Web.Tests/PocketBaseClientTests.cs

@@ -23,14 +23,15 @@ public sealed class PocketBaseClientTests(PocketBaseFixture pocketBase)
     }
 
     [Fact]
-    public async Task Event_time_is_read_as_wall_clock_not_shifted()
+    public async Task Event_utc_is_converted_to_berlin_wall_clock()
     {
         var client = pocketBase.CreateClient();
 
         var events = await client.GetEventsAsync();
 
-        // The meeting is seeded as 19:30; by the timezone convention the number is
+        // The meeting is seeded as 17:30Z. October is summer time (UTC+2), so the
-        // taken at face value, so no shift to 20:30/21:30 happens.
+        // converter turns it into 19:30 Berlin wall-clock -- the time an editor
+        // entered in the admin form.
         var meeting = events.FirstOrDefault(e =>
             e.Title.Contains("Elternbeiratssitzung", StringComparison.Ordinal));
         meeting.ShouldNotBeNull();

Elternbeirat.Web.Tests/PocketBaseFixture.cs

@@ -295,15 +295,18 @@ public sealed class PocketBaseFixture : IAsyncLifetime
             body = "Text", slug = "new-hall", @public = true,
         });
 
-        // Events: the meeting carries the wall-clock time the timezone test checks.
+        // Events: PocketBase stores UTC. The meeting is 19:30 Berlin; October is
+        // summer time (UTC+2), so it is stored as 17:30Z and the timezone test
+        // expects 19:30 back. The Herbstbasar is 09:00-13:00 Berlin in November
+        // (winter, UTC+1), stored as 08:00Z-12:00Z.
         await CreateRecordAsync(http, "events", new
         {
-            start = "2026-10-08 19:30:00.000Z", title = "Elternbeiratssitzung",
+            start = "2026-10-08 17:30:00.000Z", title = "Elternbeiratssitzung",
             location = "Aula", note = "", @public = true,
         });
         await CreateRecordAsync(http, "events", new
         {
-            start = "2026-11-22 09:00:00.000Z", end = "2026-11-22 13:00:00.000Z",
+            start = "2026-11-22 08:00:00.000Z", end = "2026-11-22 12:00:00.000Z",
             title = "Herbstbasar", location = "Schulhof", note = "", @public = true,
         });
 

docs/redaktion.md

@@ -128,11 +128,12 @@ Die Übersicht `/events` trennt automatisch in kommende und vergangene Termine;
 die Reihenfolge der Records spielt keine Rolle. Besucher können `/events.ics` in
 ihrer Kalender-App abonnieren — der Feed entsteht aus denselben Records.
 
-> **Uhrzeit = Ortszeit.** Das Admin-Formular rechnet Datumsfelder in die
+> **Trage einfach die Ortszeit ein.** Gib die Uhrzeit ein, die auf der Seite
-> Browser-Zeitzone um und zeigt eine gespeicherte `19:30` je nach Sommer-/Winter-
+> stehen soll (Europe/Berlin) — z. B. `08:00`. PocketBase speichert intern in UTC
-> zeit als 20:30/21:30 an. Das ist **kein** Fehler, nur zwei Bezugssysteme: der
+> und zeigt dir nach dem Speichern deshalb einen um 1–2 Stunden früheren Wert an
-> gespeicherte Zahlenwert **ist** die Ortszeit (Europe/Berlin), die App zeigt ihn
+> (aus `08:00` wird im Sommer `06:00`). Das ist **kein** Fehler: Die Website
-> unverändert. Trage die Uhrzeit ein, die auf der Seite stehen soll.
+> rechnet beim Anzeigen automatisch nach Ortszeit zurück und zeigt wieder `08:00`,
+> Sommer- und Winterzeit inklusive. Du musst dich um UTC nicht kümmern.
 
 ---