feat(prompts): weekly-report instructions from file, point at data sections

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/ClaudeDo.Worker/Report/WeekReportPromptBuilder.cs

@@ -5,33 +5,19 @@ namespace ClaudeDo.Worker.Report;
 
 public static class WeekReportPromptBuilder
 {
-    private const string Instructions = """
-        You are generating a concise weekly standup report for a software developer.
-        Summarize what they accomplished between {0} and {1}.
-
-        Rules:
-        - Write the ENTIRE report in German.
-        - Group by day. One "## {{Wochentag}}, {{dd.MM.yyyy}}" section per day that has
-          activity (German weekday names). Omit days with no activity entirely.
-        - Within each day: 3-5 first-person, past-tense bullets ("- Habe X umgesetzt",
-          "- Y behoben"). Merge related small work into one bullet.
-        - Drop trivia: typo fixes, pure exploration, false starts, tooling/log noise.
-        - Blend the developer's own notes and the derived activity into ONE deduplicated
-          bullet list per day. The developer's notes are authoritative - never omit or
-          contradict their substance.
-        - Name the project/repo when it adds clarity.
-        - Output ONLY the dated sections. No preamble, no intro, no closing remarks.
-        """;
-
     public static string Build(
         DateOnly start, DateOnly end,
         IReadOnlyList<RepoActivity> activity,
         IReadOnlyDictionary<DateOnly, List<string>> notesByDay)
     {
         var sb = new StringBuilder();
-        sb.AppendLine(string.Format(CultureInfo.InvariantCulture, Instructions,
-            start.ToString("dd.MM.yyyy", CultureInfo.InvariantCulture),
-            end.ToString("dd.MM.yyyy", CultureInfo.InvariantCulture)));
+        sb.AppendLine(ClaudeDo.Data.PromptFiles.Render(
+            ClaudeDo.Data.PromptKind.WeeklyReport,
+            new Dictionary<string, string>
+            {
+                ["start"] = start.ToString("dd.MM.yyyy", CultureInfo.InvariantCulture),
+                ["end"] = end.ToString("dd.MM.yyyy", CultureInfo.InvariantCulture),
+            }));
         sb.AppendLine();
 
         var days = new SortedDictionary<DateOnly, List<(string Repo, DayActivity Day)>>();