Add value sources for dynamic brightness control on LED targets

Introduces a new Value Source entity that produces a scalar float (0.0-1.0)
for dynamic brightness modulation. Three subtypes: Static (constant),
Animated (sine/triangle/square/sawtooth waveform), and Audio-reactive
(RMS/peak/beat from mono audio source). Value sources can be optionally
attached to LED targets to control brightness each frame.

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

server/src/wled_controller/api/schemas/value_sources.py

@@ -0,0 +1,72 @@
+"""Value source schemas (CRUD)."""
+
+from datetime import datetime
+from typing import List, Literal, Optional
+
+from pydantic import BaseModel, Field
+
+
+class ValueSourceCreate(BaseModel):
+    """Request to create a value source."""
+
+    name: str = Field(description="Source name", min_length=1, max_length=100)
+    source_type: Literal["static", "animated", "audio"] = Field(description="Source type")
+    # static fields
+    value: Optional[float] = Field(None, description="Constant value (0.0-1.0)", ge=0.0, le=1.0)
+    # animated fields
+    waveform: Optional[str] = Field(None, description="Waveform: sine|triangle|square|sawtooth")
+    speed: Optional[float] = Field(None, description="Cycles per minute (1.0-120.0)", ge=1.0, le=120.0)
+    min_value: Optional[float] = Field(None, description="Minimum output (0.0-1.0)", ge=0.0, le=1.0)
+    max_value: Optional[float] = Field(None, description="Maximum output (0.0-1.0)", ge=0.0, le=1.0)
+    # audio fields
+    audio_source_id: Optional[str] = Field(None, description="Mono audio source ID")
+    mode: Optional[str] = Field(None, description="Audio mode: rms|peak|beat")
+    sensitivity: Optional[float] = Field(None, description="Gain multiplier (0.1-5.0)", ge=0.1, le=5.0)
+    smoothing: Optional[float] = Field(None, description="Temporal smoothing (0.0-1.0)", ge=0.0, le=1.0)
+    description: Optional[str] = Field(None, description="Optional description", max_length=500)
+
+
+class ValueSourceUpdate(BaseModel):
+    """Request to update a value source."""
+
+    name: Optional[str] = Field(None, description="Source name", min_length=1, max_length=100)
+    # static fields
+    value: Optional[float] = Field(None, description="Constant value (0.0-1.0)", ge=0.0, le=1.0)
+    # animated fields
+    waveform: Optional[str] = Field(None, description="Waveform: sine|triangle|square|sawtooth")
+    speed: Optional[float] = Field(None, description="Cycles per minute (1.0-120.0)", ge=1.0, le=120.0)
+    min_value: Optional[float] = Field(None, description="Minimum output (0.0-1.0)", ge=0.0, le=1.0)
+    max_value: Optional[float] = Field(None, description="Maximum output (0.0-1.0)", ge=0.0, le=1.0)
+    # audio fields
+    audio_source_id: Optional[str] = Field(None, description="Mono audio source ID")
+    mode: Optional[str] = Field(None, description="Audio mode: rms|peak|beat")
+    sensitivity: Optional[float] = Field(None, description="Gain multiplier (0.1-5.0)", ge=0.1, le=5.0)
+    smoothing: Optional[float] = Field(None, description="Temporal smoothing (0.0-1.0)", ge=0.0, le=1.0)
+    description: Optional[str] = Field(None, description="Optional description", max_length=500)
+
+
+class ValueSourceResponse(BaseModel):
+    """Value source response."""
+
+    id: str = Field(description="Source ID")
+    name: str = Field(description="Source name")
+    source_type: str = Field(description="Source type: static, animated, or audio")
+    value: Optional[float] = Field(None, description="Static value")
+    waveform: Optional[str] = Field(None, description="Waveform type")
+    speed: Optional[float] = Field(None, description="Cycles per minute")
+    min_value: Optional[float] = Field(None, description="Minimum output")
+    max_value: Optional[float] = Field(None, description="Maximum output")
+    audio_source_id: Optional[str] = Field(None, description="Mono audio source ID")
+    mode: Optional[str] = Field(None, description="Audio mode")
+    sensitivity: Optional[float] = Field(None, description="Gain multiplier")
+    smoothing: Optional[float] = Field(None, description="Temporal smoothing")
+    description: Optional[str] = Field(None, description="Description")
+    created_at: datetime = Field(description="Creation timestamp")
+    updated_at: datetime = Field(description="Last update timestamp")
+
+
+class ValueSourceListResponse(BaseModel):
+    """List of value sources."""
+
+    sources: List[ValueSourceResponse] = Field(description="List of value sources")
+    count: int = Field(description="Number of sources")