Add effort level picker to chat model menu

[mcintyre94]

Summary

• Adds a ClaudeEffortLevel enum (low, medium, high, max) to ClaudeModel.swift
• Extends the existing model picker Menu with a second Section("Effort") — no new UI surface, just more items in the same dropdown
• Pill label stays clean at default (medium): shows Sonnet. Non-default surfaces the level: Sonnet · High
• max is hidden unless Opus is the effective model; switching away from Opus while on max resets to high
• Effort is passed on every claude -p invocation via --effort, so it applies per-turn and can be changed mid-chat

Test plan

• Open a chat, tap the model pill — confirm Model and Effort sections appear
• Select High effort — confirm pill updates to Sonnet · High
• Select Medium — confirm pill reverts to Sonnet
• Switch to Opus — confirm Max appears in the Effort section
• Select Max, then switch back to Sonnet — confirm effort resets to High and Max disappears
• Send a message with non-default effort — confirm --effort high is present in the exec command

🤖 Generated with Claude Code

[claude]

Code review

1 issue found: Missing unit tests

The new ClaudeEffortLevel enum introduces testable logic (isDefault, displayName) and ChatViewModel is modified to append --effort to the claude command string. Neither change has corresponding unit tests, which conflicts with the project convention in CLAUDE.md:

Add new unit tests when adding or modifying logic (models, parsers, utilities, view models)

The existing ClaudeModelTests.swift covers the analogous ClaudeModel enum and is a good template. Suggested additions:

• Tests for ClaudeEffortLevel.isDefault (only .medium should return true)
• Tests for ClaudeEffortLevel.displayName for each case
• A test in ChatViewModelTests.swift that builds a command with a non-default effort level and asserts --effort high (or similar) appears in the output

See:

wisp/Wisp/Models/Claude/ClaudeModel.swift

Lines 3 to 22 in e63d1c8

	enum ClaudeEffortLevel: String, CaseIterable, Identifiable {
	case low
	case medium
	case high
	case max
	var id: String { rawValue }
	var displayName: String {
	switch self {
	case .low: "Low"
	case .medium: "Medium"
	case .high: "High"
	case .max: "Max"
	}
	}
	var isDefault: Bool { self == .medium }
	}