feat(desktop/cli): add expand_thinking config toggle and persist /verbose (#3303 #3312)

[ashishexee]

Closes #3303
Closes #3312

Problem

#3303 — Every AI response that includes reasoning shows a collapsible "thinking" section in the desktop app. It was hardcoded to collapsed — useState(false) in Message.tsx. Users who always want to see the reasoning had to click expand every single time, on every single message.

#3312 — The /verbose toggle (Ctrl+O) resets on every CLI session. Users who prefer seeing reasoning text must re-toggle it each time they start a chat.

Solution

#3303 — Adds a [desktop].expand_thinking config option that controls the default expand/collapse state of the reasoning section. Collapsed by default (no behavior change for existing users).

#3312 — Adds a [ui].show_reasoning config option. The /verbose toggle now persists across sessions by writing to config.

Changes

#3303 — Desktop expand_thinking toggle

Go (config layer)

• DesktopConfig.ExpandThinking — bool field with TOML tag expand_thinking, default false
• Config.SetExpandThinking(bool) — mutator in edit.go, follows the same pattern as SetDesktopCloseBehavior
• render.go — TOML output includes expand_thinking with inline comment

Go (desktop bridge)

• SettingsView.ExpandThinking — bool JSON field, populated from config in Settings()
• App.SetExpandThinking(bool) — Wails-bound method, writes via applyConfigOnly (no controller rebuild — display-only setting)

Frontend (types + bridge)

• SettingsView in types.ts — added expandThinking: boolean
• AppBindings in bridge.ts — added SetExpandThinking(on: boolean): Promise<void>
• Mock implementation in bridge.ts for browser dev mode

Frontend (UI)

• AssistantMessage in Message.tsx — accepts defaultExpanded prop → ProcessCard defaultOpen={item.streaming || defaultExpanded}
• Transcript.tsx — threads defaultExpandThinking through hot/warm/cold zones (LiveAssistantMessage, WarmZone, WarmTurnItems)
• App.tsx — fetches setting on startup, stores in expandThinking state, passes to Transcript
• SettingsPanel.tsx — two-button segmented control using <SettingsField> in General tab ("Collapsed" / "Expanded")

i18n

• en.ts — "settings.expandThinking", "settings.expandThinking.expanded", "settings.expandThinking.collapsed"
• zh.ts — "思考过程显示", "默认展开", "默认折叠"

#3312 — CLI /verbose persistence

Go (config layer)

• UIConfig.ShowReasoning — bool field with TOML tag show_reasoning, default false
• Config.SetShowReasoning(bool) — mutator in edit.go
• render.go — TOML output for [ui] section

Go (CLI)

• chat_tui.go — cfg *config.Config field, toggleVerboseReasoning now calls cfg.SetShowReasoning + cfg.Save()
• cli.go — init showReasoning from config on startup
• help_view.go — added /verbose to builtinHelpItems()

Config example

[ui]
show_reasoning = true   # CLI: show thinking text by default; false = collapsed (toggle with Ctrl+O)

[desktop]
expand_thinking = true   # show reasoning text expanded by default; false = collapsed

Behavior notes

• ProcessCard defaultOpen={item.streaming || defaultExpanded} — streaming messages always open; non-streaming messages respect the setting on mount
• History panel preview stays collapsed (doesn't pass defaultExpandThinking)
• Desktop setting does not affect CLI; CLI setting does not affect desktop

Testing

• go test ./internal/... — passes
• go vet ./internal/... — clean
• gofmt -l — clean on all changed Go files
• go test -race ./internal/config/... ./internal/cli/... — clean

[ashishexee]

@esengine @SivanCola can you take a look at this I have pushed the changes for 3 issues
#3303 #3312
edit: made a seperate pr for #3316 /sandbox

[esengine]

The expand_thinking work itself looks good — config field, mutator following the SetDesktopCloseBehavior pattern, and the Message.tsx default wiring are all clean.

One thing before merge: this PR bundles three independent changes under a title that only mentions #3303:

1. expand_thinking default toggle (#3303) — the stated change
2. /verbose persistence via UI.ShowReasoning
3. a brand-new /sandbox status command (closes #3316)

The /sandbox command (#3316) is unrelated to thinking-section display and pulls in the sandbox package + new slash command, help, and completion entries. Bundling two separately-tracked issues makes the history harder to revert and review.

Please split /sandbox (#3316) into its own PR. This one can keep #3303 plus the /verbose persistence (both about reasoning display, so they belong together). Once split, I'll merge this promptly.

[ashishexee]

seems like a good idea let me do it after that we can merge

[ashishexee]

Split /sandbox (#3316) into its own PR as requested.
This PR now only covers #3303 + #3312 — both reasoning-display changes. Force-pushed as a single clean commit. Ready for re-review.