feat: web frontend; middleware; serde (WIP?)

migrations/20251130125600_init.sql

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+-- Initial schema for My Linspirer MITM server
+
+-- Global configuration
+CREATE TABLE IF NOT EXISTS config (
+    key TEXT PRIMARY KEY,
+    value TEXT NOT NULL,
+    description TEXT,
+    updated_at DATETIME DEFAULT CURRENT_TIMESTAMP
+);
+
+-- Interception rules for JSON-RPC methods
+CREATE TABLE IF NOT EXISTS interception_rules (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    method_name TEXT NOT NULL UNIQUE,
+    action TEXT NOT NULL CHECK(action IN ('passthrough', 'modify', 'replace')),
+    custom_response TEXT,
+    is_enabled BOOLEAN DEFAULT 1,
+    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+    updated_at DATETIME DEFAULT CURRENT_TIMESTAMP
+);
+
+-- Template responses (for building custom_response)
+CREATE TABLE IF NOT EXISTS response_templates (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    name TEXT NOT NULL UNIQUE,
+    method_name TEXT NOT NULL,
+    response_json TEXT NOT NULL,
+    description TEXT,
+    created_at DATETIME DEFAULT CURRENT_TIMESTAMP
+);
+
+-- Command queue persistence
+CREATE TABLE IF NOT EXISTS commands (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    command_json TEXT NOT NULL,
+    status TEXT NOT NULL CHECK(status IN ('unverified', 'verified', 'rejected')),
+    received_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+    processed_at DATETIME,
+    notes TEXT
+);
+
+-- Request/Response logs (optional, can be large)
+CREATE TABLE IF NOT EXISTS request_logs (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    method TEXT,
+    path TEXT,
+    request_body TEXT,
+    response_body TEXT,
+    status_code INTEGER,
+    timestamp DATETIME DEFAULT CURRENT_TIMESTAMP
+);
+
+-- Indexes for performance
+CREATE INDEX IF NOT EXISTS idx_commands_status ON commands(status);
+CREATE INDEX IF NOT EXISTS idx_logs_timestamp ON request_logs(timestamp);
+CREATE INDEX IF NOT EXISTS idx_logs_method ON request_logs(method);
+
+-- Insert default config values
+INSERT OR IGNORE INTO config (key, value, description) VALUES
+    ('target_url', 'https://cloud.linspirer.com:883', 'Target server URL for proxying'),
+    ('logging_enabled', 'true', 'Enable request/response logging'),
+    ('log_retention_days', '7', 'Number of days to keep request logs');