Refactor: Consolidate view style factory pattern

[yimsk]

Summary

Extract duplicated style struct + factory function pattern across 12+ views into a common utility.

Current Duplication

Similar pattern in every view:

View	Struct Location	Lines
LogView	log_view.go:61-80	20
DetailView	detail_view.go:22-35	14
DiffView	diff_view.go:32-47	16
HelpView	help_view.go:13-28	16
MultiSelector	multi_selector.go:19-36	18
ServiceBrowser	service_browser.go:78-125	48
ResourceBrowser	resource_browser.go:30-49	20
DashboardView	dashboard_view.go:21-32	12
HeaderPanel	header_panel.go	~15
Modal	modal.go	~10
CommandInput	command_input.go	~12
ActionMenu	action_menu.go	~15

// Every view has this pattern
type xxxViewStyles struct {
    header    lipgloss.Style
    title     lipgloss.Style
    dim       lipgloss.Style
    // ... many repeated fields
}

func newXxxViewStyles() xxxViewStyles {
    t := ui.Current()
    return xxxViewStyles{
        header: lipgloss.NewStyle().Bold(true).Foreground(t.Primary),
        dim:    lipgloss.NewStyle().Foreground(t.TextDim),
        // ... repetitive construction
    }
}

Proposed Solution

Option A: Common style presets in internal/ui/

// internal/ui/styles.go
func (t *Theme) HeaderStyle() lipgloss.Style {
    return lipgloss.NewStyle().Bold(true).Foreground(t.Primary)
}

func (t *Theme) DimStyle() lipgloss.Style {
    return lipgloss.NewStyle().Foreground(t.TextDim)
}

func (t *Theme) ErrorStyle() lipgloss.Style {
    return lipgloss.NewStyle().Foreground(t.Danger)
}

Option B: StyleBuilder pattern

type StyleBuilder struct {
    theme *Theme
    styles map[string]lipgloss.Style
}

func NewStyleBuilder() *StyleBuilder { ... }
func (b *StyleBuilder) Header() lipgloss.Style { ... }
func (b *StyleBuilder) Dim() lipgloss.Style { ... }

Common Style Names Across Views

Style Name	Usage Count	Pattern
header	8+ views	Bold, Primary
title	6+ views	Bold, Primary
dim	10+ views	TextDim
error	6+ views	Danger
paused/warning	3+ views	Warning
timestamp	2 views	Secondary

Impact

• Lines removed: 175+ lines of boilerplate
• Files simplified: 12+ view files
• Maintainability: Theme changes propagate automatically
• Consistency: All views use same style definitions

Notes

• Views may still need custom styles, but common ones should be shared
• Consider caching at Theme level for performance

Related

• Depends on theme system in internal/ui/theme.go
• Identified during Feature Proposal: Internal Log Streamer #29 CloudWatch Logs viewer review