Rename `/goal` → `/hunt`: quarry, verdict vocabulary, trophy card writer

[Hmbown]

Rename /goal → /hunt and ship the recovery-state vocabulary v0.8.45 needs.

You declare a quarry — what you're after. The whale gets a target. Each session-completion path returns a verdict: hunting, hunted, wounded, or escaped. v0.8.45's theme is interruptible, recoverable agentic work — without wounded and escaped you only have done-or-nothing. /hunt ships the vocabulary; the judge that decides verdicts lands in v0.8.46 (wired to the existing verifier preview) and the full jurisdiction system lands in v0.9.0.

Why now (v0.8.45 fit)

• v0.8.45's milestone is "interruptible, recoverable agentic work across providers."
• wounded and escaped are recovery-state vocabulary. Goal mode today can only complete-or-not — a session interrupted by network loss, a partial fix, an aborted hunt all collapse into the same nothing. After this issue they have distinct verdicts the runtime can act on.
• Trophy cards are the recovery artifact. A hunted session leaves a deterministic, machine-readable record at ~/.codewhale/trophies/<date>-<slug>.md that the next session can pick up.
• /goal exists today (crates/tui/src/commands/goal.rs, 183 lines, 5 localizations including mubiao). The rename is mechanical; the verdict + trophy additions are bounded.

Why the rename

Whales hunt — orcas cooperatively, sperm whales solo on giant squid, humpbacks via bubble-net. "Hunt" is more concrete than "goal" (a goal is something you set; a hunt is something you do) and it slots into the existing Constitution → Statutes → Regulations → Verdicts prompt hierarchy. The vocabulary also gives v0.8.46 verifier preview, the rest of the v0.8.x line, and the v0.9.0 judge a shared dialect.

In scope (v0.8.45 MVP)

• Rename /goal → /hunt. /goal stays as a back-compat alias for one cycle; deprecation notice in v0.8.48 per the rename-pass milestone.
• Quarry — primary surface is /hunt <text>. Stored on the session as a frozen header turn. <session_goal> block in crates/tui/src/prompts.rs:777 becomes <quarry> (keep <session_goal> as alias for one cycle).
• Verdict enum replacing the bool goal_completed:

  pub enum HuntVerdict {
      Hunting,             // default in-progress
      Hunted,              // declared done
      Wounded(String),     // partial — reason text
      Escaped(String),     // interrupted / abandoned — reason text
  }

• Slash subcommands: /hunt <text>, /hunt done, /hunt wounded <reason>, /hunt escaped <reason>, /hunt clear, /hunt (status).
• Trophy card writer. On hunted: write a markdown card to ~/.codewhale/trophies/<YYYY-MM-DD>-<slug>.md with quarry, turns, files touched (from working set), tests added (from diff), elapsed, sub-agents that helped (whale species names), final assistant message.
• Theme + palette. mode_goal palette slot renames to mode_hunt; mode_goal kept as deprecated alias one cycle. theme_qa_audit.rs updated.
• Localization. All 5 existing locales updated (EN/JA/ZH/PT/ES). HomeGoalModeTip → HomeHuntModeTip; old id kept aliased one cycle.
• Backward compat. Existing config keys, session files, and any persisted goal_* fields keep their names this cycle; rename pass in v0.8.48.

Out of scope (defer)

• The judge / verifier wiring — that's Wire verifier preview to emit hunt verdicts (pass/partial/fail → hunted/wounded/escaped) #2093 (v0.8.46), composing the existing verifier-preview scope.
• The jurisdiction policy schema (strict / evidentiary / permissive) — that's /hunt jurisdiction system: configurable LLM-as-judge with strict/evidentiary/permissive policies #2094 (v0.9.0).
• Per-jurisdiction judge model selection.
• Trophy card UI / browser. The file is the v0.8.45 artifact; UI lands later.

Acceptance

• /hunt <text> opens hunt mode with the quarry visible in the transcript header until verdict.
• /hunt done produces a trophy card on disk at the path above. Card has every field listed.
• /hunt wounded "ran out of API budget" and /hunt escaped "user cancelled" produce no trophy and log the verdict to the session timeline.
• /goal <text> still works as a back-compat alias; emits a one-line deprecation notice in the response ("/goal is now /hunt; this alias is removed in v0.8.48").
• mubiao Chinese alias still works.
• prompts.rs still wires the quarry into the system prompt (renamed block).
• All 5 locales updated; unit test asserts every MessageId::HomeHuntModeTip translation exists.
• Trophy card structure has a unit test (every field present, valid path).
• cargo test --workspace --all-features --locked and the three parity gates green.

Notes

• This is the bridge issue. v0.8.46's verifier-preview (already in scope for that milestone) consumes the verdict enum; v0.9.0's full judge fills in the jurisdiction policies. The vocabulary defined here is the contract those later milestones build on.
• Whales do hunt — naming the mode after the act, not the abstraction, fits the rest of the whale theming (species sub-agent names, pods, etc.).

Existing issues this resolves on PR merge

Related (not closed yet — these resolve when the verifier and jurisdiction layers ship in v0.8.46 / v0.9.0):

• Related: Support Codex /goal long-running task mode #891 (codex /goal long-running task mode) — verbiage updates only this cycle; full behavior lands when judge wires in Wire verifier preview to emit hunt verdicts (pass/partial/fail → hunted/wounded/escaped) #2093.
• Related: Goal command should start actionable goals without a second follow-up turn #2050 (Goal command should start actionable goals without a second follow-up turn) — the verdict gate from Wire verifier preview to emit hunt verdicts (pass/partial/fail → hunted/wounded/escaped) #2093 resolves the two-turn problem.
• Related: v0.9.0: Port Codex goal system — LLM-as-judge with persistent continuation loop #2058 (Port Codex goal system — LLM-as-judge) — codewhale-native version lands in /hunt jurisdiction system: configurable LLM-as-judge with strict/evidentiary/permissive policies #2094.

Slate item 19/19. Tracking doc: .private/issue-slate.md (maintainer-only).