feat: add Settings and Suite pages with comprehensive settings management and question suite builder

- Implemented SettingsPage for configuring default provider, temperature, and model paths.
- Added SuitePage for managing a suite of questions with features to add, edit, duplicate, and delete questions.
- Introduced TypeScript configuration files for app and node environments.
- Set up Vite configuration for development server with API proxying to backend.

server/schemas.py

@@ -0,0 +1,157 @@
+"""Pydantic request/response models for the LM-Gambit API."""
+
+from __future__ import annotations
+
+from typing import Dict, List, Optional
+
+from pydantic import BaseModel, Field
+
+
+class ProviderSummary(BaseModel):
+    name: str
+    is_default: bool = False
+
+
+class ModelSummary(BaseModel):
+    id: str
+    display_name: str
+
+
+class ModelListResponse(BaseModel):
+    provider: str
+    models: List[ModelSummary]
+
+
+class TestPrompt(BaseModel):
+    """A single question in the suite.
+
+    ``title`` is derived from the first non-empty line of ``prompt`` by the
+    engine, so it is read-only here and returned for display purposes only.
+    """
+
+    filename: str
+    title: str
+    prompt: str
+
+
+class TestSuiteResponse(BaseModel):
+    tests: List[TestPrompt]
+    directory: str
+
+
+class TestDraft(BaseModel):
+    """One question as submitted by the suite builder form."""
+
+    prompt: str = Field(min_length=1)
+
+
+class SaveSuiteRequest(BaseModel):
+    tests: List[TestDraft]
+
+
+class RunMetrics(BaseModel):
+    tokens_per_second: float = 0.0
+    total_tokens: int = 0
+    time_to_first_token: float = 0.0
+    stop_reason: str = "N/A"
+
+
+class RunRequest(BaseModel):
+    provider: str
+    model_id: str
+    temperature: float = Field(default=0.1, ge=0.0, le=2.0)
+    filenames: Optional[List[str]] = Field(
+        default=None,
+        description="Subset of test filenames to run. Omit to run the whole suite.",
+    )
+
+
+class RunSummary(BaseModel):
+    average_tokens_per_second: float = 0.0
+    average_time_to_first_token: float = 0.0
+    total_tokens: int = 0
+    passed: int = 0
+    failed: int = 0
+    overall_score: Optional[float] = None
+    graded: int = 0
+
+
+class PluginSummary(BaseModel):
+    name: str
+    slug: str
+    version: str
+    description: str
+    path: str
+    enabled: bool
+    hooks: List[str] = []
+    error: Optional[str] = None
+
+
+class RunResponse(BaseModel):
+    id: str
+    status: str
+    provider: str
+    model_id: str
+    model_label: str
+    temperature: float
+    total: int
+    completed: int
+    started_at: float
+    finished_at: Optional[float] = None
+    report_name: Optional[str] = None
+    error: Optional[str] = None
+    summary: RunSummary = RunSummary()
+
+
+class PlaygroundRequest(BaseModel):
+    provider: str
+    model_id: str
+    prompt: str = Field(min_length=1)
+    temperature: float = Field(default=0.1, ge=0.0, le=2.0)
+
+
+class PlaygroundResponse(BaseModel):
+    response: Optional[str] = None
+    error: Optional[str] = None
+    metrics: Optional[RunMetrics] = None
+    elapsed: float = 0.0
+
+
+class ReportSummary(BaseModel):
+    name: str
+    model_label: str
+    size_bytes: int
+    modified_at: float
+
+
+class ReportDetail(ReportSummary):
+    content: str
+
+
+class ModelPathEntry(BaseModel):
+    nickname: str = ""
+    path: str
+
+
+class SettingsResponse(BaseModel):
+    default_provider: str
+    default_temperature: float
+    local_model_paths: List[ModelPathEntry]
+    tests_dir: str
+    results_dir: str
+    models_dir: str
+
+
+class SettingsUpdate(BaseModel):
+    default_provider: Optional[str] = None
+    default_temperature: Optional[float] = Field(default=None, ge=0.0, le=2.0)
+    local_model_paths: Optional[List[ModelPathEntry]] = None
+
+
+class SystemInfo(BaseModel):
+    version: str
+    engine_architecture: str
+    engine_runtime: str
+    template_ok: bool
+    python_version: str
+    metrics: Dict[str, str] = {}