feat(new-workspace): unified source picker + non-submitted URL drafts for agents

[nwparker]

Summary

Two threads landed in this branch:

1. Unified the New Workspace dialog — replaces the separate "Create from…" tab with a single source-picker (Smart / GitHub / Branch / Linear / Name) inline with the workspace name field. ~1320 lines of `CreateFromTab` removed; the smart field now owns search, mode tabs, cross-repo URL detection, and a dismissible source pill.

2. Selected-source pill + non-submitted URL drafts — when the user picks a GitHub issue/PR or Linear item, the agent launches with that URL pre-filled in its input as a draft (no auto-submit). Replaces the previous `Complete ` autosubmitted prompt template.

What's in the pill

• Distinct icons per kind (PR / issue / branch / Linear) — no redundant text descriptor (the icon carries the meaning).
• Truncates long titles instead of expanding the dialog (`min-w-0` cascade through flex/grid ancestors so `truncate` actually bites).
• Open-in-browser button (with tooltip) for items that carry a URL.
• Clear button (with tooltip) to reset the selection.

Agent draft injection

The agent input is pre-filled via bracketed-paste mode (`\x1b[200~…\x1b[201~`) so the URL lands atomically in the TUI's input buffer without a trailing `\r` — the user reviews and sends themselves.

The hard part was timing. Different TUIs need different amounts of warm-up:

Agent	Title-idle signal	Min wait before paste lands
Claude	`✳ Claude Code` (~500ms)	~600ms
Pi	`π - ` (~1s)	~600ms
Codex	none — shows a working spinner indefinitely	~600ms after fg stable
OpenCode	none — title is just `OpenCode`	~3000ms

Verified empirically with a `node-pty` + `@xterm/headless` test rig that mirrors Orca's spawn flow (DSR/DA1 auto-responses, shell cold-start, then queued startup command).

The new `waitForTuiInputReady` in `src/renderer/src/lib/agent-paste-draft.ts` combines:

• Title-idle → 200ms grace, declare ready (covers Claude, Pi).
• Non-shell foreground stable for ≥1500ms OR non-empty title stable for ≥800ms, gated behind a 2500ms minimum floor (covers Codex, OpenCode).
• Timeout fallback (12s) only fires if a non-shell process is in the foreground — never blast the URL into a bare shell.

One subtlety worth calling out: argv-mode agents distributed via npm (claude, codex, pi) report `process: 'node'` in node-pty even though the binary is the agent. `isAgentForeground` accepts `'node'` for this reason — the previous `expectedProcess: 'codex'` match never fired.

Other tweaks

• `AgentStartupPlan` now carries the `agent` id so the paste path can apply per-agent behavior in the future without re-deriving it from the launch command. (Tests updated to match.)
• Extended composer focus restore + fixed an unrelated cross-repo URL prompt edge case in the smart name field.

Known gaps (follow-ups)

• Copilot and Cursor-agent show a permission/approval prompt on first launch, which absorbs the bracketed paste. Easiest near-term fix is to mark them as draft-injection-unsupported and surface a toast — opting to ship the working agents first and iterate. (Hook is already in place: `agent` arg on `pasteDraftWhenAgentReady`.)

Verification

• `pnpm tc:web` clean
• `pnpm test src/renderer/src/lib/tui-agent-startup.test.ts` — 10/10 passing (test fixtures updated for the new `agent` field on the plan)
• `oxlint src/renderer/src/lib src/shared/tui-agent-config.ts` clean
• Manual: Claude / Codex / Pi / OpenCode confirmed working by user ("opencode works", "works for Claude") and by simulated PTY rig for Codex/Pi.

Made with Orca 🐋