feat: value table + {{placeholder|d}} modifier (Issue #47)

FEATURE #47: Wertetabelle nach KI-Analysen
- Migration 021: metadata JSONB column in ai_insights
- Backend sammelt resolved placeholders mit descriptions beim Speichern
- Frontend: Collapsible value table in InsightCard
  - Zeigt: Platzhalter | Wert | Beschreibung
  - Sortiert tabellarisch
  - Funktioniert für base + pipeline prompts

FEATURE #48: {{placeholder|d}} Modifier
- Syntax: {{weight_aktuell|d}} → "85.2 kg (Aktuelles Gewicht in kg)"
- resolve_placeholders() erkennt |d modifier
- Hängt description aus catalog an Wert
- Fein-granulare Kontrolle pro Platzhalter (nicht global)
- Optional: nur wo sinnvoll einsetzen

TECHNICAL:
- prompt_executor.py: catalog parameter durchgereicht
- execute_prompt_with_data() lädt catalog via get_placeholder_catalog()
- Catalog als _catalog in variables übergeben, in execute_prompt() extrahiert
- Base + Pipeline Prompts unterstützen |d modifier

EXAMPLE:
Template: "Gewicht: {{weight_aktuell|d}}, Alter: {{age}}"
Output:   "Gewicht: 85.2 kg (Aktuelles Gewicht in kg), Alter: 55"

version: 9.6.0 (feature)
module: prompts 2.1.0, insights 1.4.0

backend/migrations/021_ai_insights_metadata.sql

@@ -0,0 +1,7 @@
+-- Migration 021: Add metadata column to ai_insights for storing debug info
+-- Date: 2026-03-26
+-- Purpose: Store resolved placeholder values with descriptions for transparency
+
+ALTER TABLE ai_insights ADD COLUMN IF NOT EXISTS metadata JSONB DEFAULT NULL;
+
+COMMENT ON COLUMN ai_insights.metadata IS 'Debug info: resolved placeholders, descriptions, etc.';

backend/prompt_executor.py

@@ -14,14 +14,18 @@ from db import get_db, get_cursor, r2d
 from fastapi import HTTPException
 
 
-def resolve_placeholders(template: str, variables: Dict[str, Any], debug_info: Optional[Dict] = None) -> str:
+def resolve_placeholders(template: str, variables: Dict[str, Any], debug_info: Optional[Dict] = None, catalog: Optional[Dict] = None) -> str:
     """
     Replace {{placeholder}} with values from variables dict.
 
+    Supports modifiers:
+    - {{key|d}} - Include description in parentheses (requires catalog)
+
     Args:
-        template: String with {{key}} placeholders
+        template: String with {{key}} or {{key|modifiers}} placeholders
         variables: Dict of key -> value mappings
         debug_info: Optional dict to collect debug information
+        catalog: Optional placeholder catalog for descriptions (from get_placeholder_catalog)
 
     Returns:
         Template with placeholders replaced
@@ -30,7 +34,13 @@ def resolve_placeholders(template: str, variables: Dict[str, Any], debug_info: O
     unresolved = []
 
     def replacer(match):
-        key = match.group(1).strip()
+        full_placeholder = match.group(1).strip()
+
+        # Parse key and modifiers (e.g., "weight_aktuell|d" -> key="weight_aktuell", modifiers="d")
+        parts = full_placeholder.split('|')
+        key = parts[0].strip()
+        modifiers = parts[1].strip() if len(parts) > 1 else ''
+
         if key in variables:
             value = variables[key]
             # Convert dict/list to JSON string
@@ -39,6 +49,19 @@ def resolve_placeholders(template: str, variables: Dict[str, Any], debug_info: O
             else:
                 resolved_value = str(value)
 
+            # Apply modifiers
+            if 'd' in modifiers and catalog:
+                # Add description from catalog
+                description = None
+                for cat_items in catalog.values():
+                    matching = [item for item in cat_items if item['key'] == key]
+                    if matching:
+                        description = matching[0].get('description', '')
+                        break
+
+                if description:
+                    resolved_value = f"{resolved_value} ({description})"
+
             # Track resolution for debug
             if debug_info is not None:
                 resolved[key] = resolved_value[:100] + ('...' if len(resolved_value) > 100 else '')
@@ -151,13 +174,16 @@ async def execute_prompt(
 
     prompt_type = prompt.get('type', 'pipeline')
 
+    # Get catalog from variables if available (passed from execute_prompt_with_data)
+    catalog = variables.pop('_catalog', None) if '_catalog' in variables else None
+
     if prompt_type == 'base':
         # Base prompt: single execution with template
-        return await execute_base_prompt(prompt, variables, openrouter_call_func, enable_debug)
+        return await execute_base_prompt(prompt, variables, openrouter_call_func, enable_debug, catalog)
 
     elif prompt_type == 'pipeline':
         # Pipeline prompt: multi-stage execution
-        return await execute_pipeline_prompt(prompt, variables, openrouter_call_func, enable_debug)
+        return await execute_pipeline_prompt(prompt, variables, openrouter_call_func, enable_debug, catalog)
 
     else:
         raise HTTPException(400, f"Unknown prompt type: {prompt_type}")
@@ -167,7 +193,8 @@ async def execute_base_prompt(
     prompt: Dict,
     variables: Dict[str, Any],
     openrouter_call_func,
-    enable_debug: bool = False
+    enable_debug: bool = False,
+    catalog: Optional[Dict] = None
 ) -> Dict[str, Any]:
     """Execute a base-type prompt (single template)."""
     template = prompt.get('template')
@@ -176,8 +203,8 @@ async def execute_base_prompt(
 
     debug_info = {} if enable_debug else None
 
-    # Resolve placeholders
-    prompt_text = resolve_placeholders(template, variables, debug_info)
+    # Resolve placeholders (with optional catalog for |d modifier)
+    prompt_text = resolve_placeholders(template, variables, debug_info, catalog)
 
     if enable_debug:
         debug_info['template'] = template
@@ -215,7 +242,8 @@ async def execute_pipeline_prompt(
     prompt: Dict,
     variables: Dict[str, Any],
     openrouter_call_func,
-    enable_debug: bool = False
+    enable_debug: bool = False,
+    catalog: Optional[Dict] = None
 ) -> Dict[str, Any]:
     """
     Execute a pipeline-type prompt (multi-stage).
@@ -282,7 +310,7 @@ async def execute_pipeline_prompt(
                     raise HTTPException(400, f"Inline prompt missing template in stage {stage_num}")
 
                 placeholder_debug = {} if enable_debug else None
-                prompt_text = resolve_placeholders(template, context_vars, placeholder_debug)
+                prompt_text = resolve_placeholders(template, context_vars, placeholder_debug, catalog)
 
                 if enable_debug:
                     prompt_debug['source'] = 'inline'
@@ -368,7 +396,7 @@ async def execute_prompt_with_data(
         Execution result dict
     """
     from datetime import datetime, timedelta
-    from placeholder_resolver import get_placeholder_example_values
+    from placeholder_resolver import get_placeholder_example_values, get_placeholder_catalog
 
     # Build variables from data modules
     variables = {
@@ -376,6 +404,13 @@ async def execute_prompt_with_data(
         'today': datetime.now().strftime('%Y-%m-%d')
     }
 
+    # Load placeholder catalog for |d modifier support
+    try:
+        catalog = get_placeholder_catalog(profile_id)
+        variables['_catalog'] = catalog  # Will be popped in execute_prompt
+    except Exception:
+        catalog = None
+
     # Add PROCESSED placeholders (name, weight_trend, caliper_summary, etc.)
     # This makes old-style prompts work with the new executor
     try:

backend/routers/prompts.py

@@ -812,13 +812,69 @@ async def execute_unified_prompt(
             if isinstance(content, dict):
                 content = json.dumps(content, ensure_ascii=False)
 
-        # Save to database
+        # Prepare metadata with resolved placeholders and descriptions
+        from placeholder_resolver import get_placeholder_catalog
+
+        metadata = {
+            'prompt_type': result['type'],
+            'placeholders': {}
+        }
+
+        # Collect all resolved placeholders from debug info
+        if result.get('debug'):
+            catalog = get_placeholder_catalog(profile_id)
+
+            if result['type'] == 'base':
+                # Base prompt: single set of placeholders
+                resolved = result['debug'].get('resolved_placeholders', {})
+                for key, value in resolved.items():
+                    # Find description in catalog
+                    desc = None
+                    for cat_items in catalog.values():
+                        matching = [item for item in cat_items if item['key'] == key]
+                        if matching:
+                            desc = matching[0].get('description', '')
+                            break
+
+                    metadata['placeholders'][key] = {
+                        'value': value,
+                        'description': desc or ''
+                    }
+
+            elif result['type'] == 'pipeline':
+                # Pipeline: collect from all stages
+                stages_debug = result['debug'].get('stages', [])
+                for stage_debug in stages_debug:
+                    for prompt_debug in stage_debug.get('prompts', []):
+                        resolved = {}
+                        # Check both direct and ref_debug
+                        if 'resolved_placeholders' in prompt_debug:
+                            resolved = prompt_debug['resolved_placeholders']
+                        elif 'ref_debug' in prompt_debug and 'resolved_placeholders' in prompt_debug['ref_debug']:
+                            resolved = prompt_debug['ref_debug']['resolved_placeholders']
+
+                        for key, value in resolved.items():
+                            if key not in metadata['placeholders']:  # Avoid duplicates
+                                # Find description in catalog
+                                desc = None
+                                for cat_items in catalog.values():
+                                    matching = [item for item in cat_items if item['key'] == key]
+                                    if matching:
+                                        desc = matching[0].get('description', '')
+                                        break
+
+                                metadata['placeholders'][key] = {
+                                    'value': value,
+                                    'description': desc or ''
+                                }
+
+        # Save to database with metadata
         with get_db() as conn:
             cur = get_cursor(conn)
             cur.execute(
-                """INSERT INTO ai_insights (id, profile_id, scope, content, created)
-                   VALUES (%s, %s, %s, %s, CURRENT_TIMESTAMP)""",
-                (str(uuid.uuid4()), profile_id, prompt_slug, content)
+                """INSERT INTO ai_insights (id, profile_id, scope, content, metadata, created)
+                   VALUES (%s, %s, %s, %s, %s, CURRENT_TIMESTAMP)""",
+                (str(uuid.uuid4()), profile_id, prompt_slug, content, json.dumps(metadata))
             )
             conn.commit()
 

frontend/src/pages/Analysis.jsx

@@ -15,11 +15,17 @@ const SLUG_LABELS = {
 
 function InsightCard({ ins, onDelete, defaultOpen=false, prompts=[] }) {
   const [open, setOpen] = useState(defaultOpen)
+  const [showValues, setShowValues] = useState(false)
 
   // Find matching prompt to get display_name
   const prompt = prompts.find(p => p.slug === ins.scope)
   const displayName = prompt?.display_name || SLUG_LABELS[ins.scope] || ins.scope
 
+  // Parse metadata if available
+  const metadata = ins.metadata ? (typeof ins.metadata === 'string' ? JSON.parse(ins.metadata) : ins.metadata) : null
+  const placeholders = metadata?.placeholders || {}
+  const placeholderCount = Object.keys(placeholders).length
+
   return (
     <div className="card section-gap" style={{borderLeft:`3px solid var(--accent)`}}>
       <div style={{display:'flex',alignItems:'center',gap:8,marginBottom:open?12:0,cursor:'pointer'}}
@@ -38,7 +44,61 @@ function InsightCard({ ins, onDelete, defaultOpen=false, prompts=[] }) {
         </button>
         {open ? <ChevronUp size={16} color="var(--text3)"/> : <ChevronDown size={16} color="var(--text3)"/>}
       </div>
-      {open && <Markdown text={ins.content}/>}
+      {open && (
+        <>
+          <Markdown text={ins.content}/>
+
+          {/* Value Table */}
+          {placeholderCount > 0 && (
+            <div style={{ marginTop: 16, borderTop: '1px solid var(--border)', paddingTop: 12 }}>
+              <div
+                onClick={() => setShowValues(!showValues)}
+                style={{
+                  cursor: 'pointer',
+                  fontSize: 12,
+                  color: 'var(--text2)',
+                  fontWeight: 600,
+                  display: 'flex',
+                  alignItems: 'center',
+                  gap: 6
+                }}
+              >
+                {showValues ? <ChevronUp size={14} /> : <ChevronDown size={14} />}
+                📊 Verwendete Werte ({placeholderCount})
+              </div>
+
+              {showValues && (
+                <div style={{ marginTop: 12, fontSize: 11 }}>
+                  <table style={{ width: '100%', borderCollapse: 'collapse' }}>
+                    <thead>
+                      <tr style={{ borderBottom: '1px solid var(--border)', textAlign: 'left' }}>
+                        <th style={{ padding: '6px 8px', color: 'var(--text3)', fontWeight: 600 }}>Platzhalter</th>
+                        <th style={{ padding: '6px 8px', color: 'var(--text3)', fontWeight: 600 }}>Wert</th>
+                        <th style={{ padding: '6px 8px', color: 'var(--text3)', fontWeight: 600 }}>Beschreibung</th>
+                      </tr>
+                    </thead>
+                    <tbody>
+                      {Object.entries(placeholders).map(([key, data]) => (
+                        <tr key={key} style={{ borderBottom: '1px solid var(--border)' }}>
+                          <td style={{ padding: '6px 8px', fontFamily: 'monospace', color: 'var(--accent)' }}>
+                            {key}
+                          </td>
+                          <td style={{ padding: '6px 8px', fontFamily: 'monospace' }}>
+                            {data.value}
+                          </td>
+                          <td style={{ padding: '6px 8px', color: 'var(--text3)', fontSize: 10 }}>
+                            {data.description || '—'}
+                          </td>
+                        </tr>
+                      ))}
+                    </tbody>
+                  </table>
+                </div>
+              )}
+            </div>
+          )}
+        </>
+      )}
     </div>
   )
 }