feat: Introduce Summary and Professional skills, replacing the old style mode and text structuring configuration options.

Core/PromptBuilder.cs

@@ -30,6 +30,9 @@ public static class PromptBuilder
         if (config.ModulePunctuation)
         {
             sb.AppendLine("- Apply standard punctuation, grammar, and capitalization rules.");
+            sb.AppendLine("- Preserve the exact original tone, rhythm, and word choice of the speaker.");
+            sb.AppendLine("- ONLY fix obvious grammatical errors, spelling mistakes, and bad punctuation.");
+            sb.AppendLine("- Do not attempt to formalize the language or alter the speaker's personal voice and cadence.");
         }
 
         if (config.ModuleTechnicalSanitization)
@@ -37,29 +40,6 @@ public static class PromptBuilder
             sb.AppendLine("- Ensure technical terms are properly formatted (e.g., 'C#' instead of 'c sharp', 'HANA' instead of 'hana', 'SAP' instead of 'sap', 'API', 'SQL').");
         }
 
-        switch (config.StyleMode.ToLowerInvariant())
-        {
-            case "professional":
-                sb.AppendLine("- Rewrite the text into formal prose suitable for emails or professional documents.");
-                break;
-            case "concise":
-                sb.AppendLine("- Summarize the text, removing fluff and filler for quick notes.");
-                break;
-            case "casual":
-                sb.AppendLine("- Maintain the original rhythm and tone but fix spelling and grammar.");
-                break;
-        }
-
-        if (config.StructureBulletPoints)
-        {
-            sb.AppendLine("- Format the output as a bulleted list where appropriate.");
-        }
-
-        if (config.StructureSmartParagraphing)
-        {
-            sb.AppendLine("- Break the text logically into paragraphs based on context.");
-        }
-
         return sb.ToString();
     }
 }

Core/Skills/ProfessionalSkill.cs

@@ -0,0 +1,26 @@
+namespace Toak.Core.Skills;
+
+public class ProfessionalSkill : ISkill
+{
+    public string Name => "Professional";
+    public string Description => "Rewrites the spoken text to sound highly professional and articulate.";
+    public string[] Hotwords => new[] { "System professional", "System rewrite professionally", "System formalize" };
+
+    public bool HandlesExecution => false;
+
+    public string GetSystemPrompt(string rawTranscript)
+    {
+        return @"You are an expert formal editor and corporate communicator.
+The user wants to rewrite the following text professionally. The transcript might start with a hotword like 'System professional'.
+- Enhance the text from the speaker to sound highly professional and articulate.
+- Maintain the exact meaning and key information of the original transcription.
+- Ensure paragraph breaks are added logically to prevent walls of text, improving readability.
+- Avoid filler words, hesitations (umm, uh), or conversational redundancies.
+- Output ONLY the final polished text. Do not include markdown, explanations, or quotes.";
+    }
+
+    public void Execute(string llmResult)
+    {
+        // Not used since HandlesExecution is false
+    }
+}

Core/Skills/SkillRegistry.cs

@@ -5,7 +5,9 @@ public static class SkillRegistry
     public static readonly ISkill[] AllSkills = new ISkill[]
     {
         new TerminalSkill(),
-        new TranslateSkill()
+        new TranslateSkill(),
+        new ProfessionalSkill(),
+        new SummarySkill()
     };
     
     public static ISkill? DetectSkill(string transcript, IEnumerable<string> activeSkillNames)

Core/Skills/SummarySkill.cs

@@ -0,0 +1,25 @@
+namespace Toak.Core.Skills;
+
+public class SummarySkill : ISkill
+{
+    public string Name => "Summary";
+    public string Description => "Summarizes the spoken text securely and concisely, removing fluff.";
+    public string[] Hotwords => new[] { "System summary", "System summarize", "System concise" };
+
+    public bool HandlesExecution => false;
+
+    public string GetSystemPrompt(string rawTranscript)
+    {
+        return @"You are an expert editor who strips all fluff and makes text as concise as possible.
+The user wants to summarize the following text. The transcript might start with a hotword like 'System summary'.
+- Strip all fluff, filler, and unnecessary conversational words.
+- Make the output as direct and brief as possible without losing the core information.
+- Use clear, crisp phrasing. If the text lists items or instructions, format them logically.
+- Output ONLY the final summarized text. Do not include markdown, explanations, or quotes.";
+    }
+
+    public void Execute(string llmResult)
+    {
+        // Not used since HandlesExecution is false
+    }
+}