T08 iter 3: GROUND modes, INVESTIGATE, SOLVE

Fills in resolution steps 1, 4 and 6 (GR-R06):

- GR-R05 mode choice: a player who revealed GROUND picks GR/OU/ND after
  Reveal. Resolution refuses to start while any revealed GROUND lacks a
  mode, and only that player may choose it.
- GR-A10 GROUND-GR: self -2 Stress and Freedom readied.
- GR-A01 INVESTIGATE: reveal the chosen hidden non-Denied Problem, then
  draw one Solution; the draw still happens when nothing is revealable.
- GR-A02 SOLVE: spend a Solution of the Problem's suit and claim it; a
  later resolver the same round spends nothing, per Lead order.
- GR-A13 tightened: INVESTIGATE must target a hidden Problem, SOLVE a
  face-up non-Denied one. Previously any existing Problem was accepted.

Deck exhaustion (U4) reshuffles the discard, seeded from the game seed
and round so validate stays a pure function of state. The resulting
order travels inside DeckReshuffled, so replay never re-derives it.

Still pending, each because it needs its own decision command rather
than a default: GROUND-OU and GROUND-ND three-way choices (GR-A11/A12)
and the DARVO stage machine (GR-D02..D07). No scenario claims coverage
of them.

Filler picks in existing scenarios moved from GROUND to INVESTIGATE:
GROUND now has a real Stress effect, which was polluting the Support
and Attack assertions.

11 scenarios pass, 34 rules covered; 17 tests, fmt/clippy green.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

scenarios/ground/gr-a01-investigate.yaml

@@ -0,0 +1,43 @@
+scenario: ground/gr-a01-investigate
+description: >
+  INVESTIGATE reveals the chosen hidden Problem and draws one Solution
+  (GR-A01). Selecting an already face-up Problem is rejected (GR-A13).
+covers: [GR-A01, GR-S01]
+provisional: false
+seed: 42
+setup:
+  players: 3
+  preset: standard-3p
+  patch:
+    "lead": 0
+commands:
+  - actor: P1
+    cmd: select_action
+    args: { action: INVESTIGATE, problem: 2 }
+  # GR-A13: Problem 1 is the Surface Problem, already face up.
+  - actor: P2
+    cmd: select_action
+    args: { action: INVESTIGATE, problem: 1 }
+  - actor: P2
+    cmd: select_action
+    args: { action: INVESTIGATE, problem: 3 }
+  - actor: P3
+    cmd: select_action
+    args: { action: INVESTIGATE, problem: 3 }
+  - actor: SYSTEM
+    cmd: reveal
+  - actor: SYSTEM
+    cmd: resolve
+expect:
+  events:
+    - kind: ProblemRevealed
+      problem: 2
+    - kind: SolutionDrawn
+      player: 0
+  state:
+    "problems.2.face_up": true
+    "problems.3.face_up": true
+    # GR-S02 dealt two; INVESTIGATE drew a third. The suit is the
+    # golden value for seed 42 under the GR-S04 shuffle.
+    "players.0.hand.2.suit": Change
+  rejects: [1]

scenarios/ground/gr-a02-solve.yaml

@@ -0,0 +1,43 @@
+scenario: ground/gr-a02-solve
+description: >
+  SOLVE discards a Solution of the Problem's suit and claims it
+  (GR-A02). A second solver of the same Problem the same round spends
+  nothing, because an earlier resolver in Lead order already claimed it.
+covers: [GR-A02, GR-R07, GR-O04]
+provisional: false
+seed: 42
+setup:
+  players: 3
+  preset: standard-3p
+  patch:
+    "lead": 0
+    "players.0.hand": [{ suit: Clarify }]
+    "players.1.hand": [{ suit: Clarify }]
+commands:
+  - actor: P1
+    cmd: select_action
+    args: { action: SOLVE, problem: 1 }
+  - actor: P2
+    cmd: select_action
+    args: { action: SOLVE, problem: 1 }
+  - actor: P3
+    cmd: select_action
+    args: { action: INVESTIGATE, problem: 3 }
+  - actor: SYSTEM
+    cmd: reveal
+  - actor: SYSTEM
+    cmd: resolve
+expect:
+  events:
+    - kind: SolutionDiscarded
+      player: 0
+    - kind: ProblemClaimed
+      problem: 1
+      by: 0
+  state:
+    # Problem 1 is the Clarify Surface Problem (GR-S01).
+    "problems.1.claimed_by": 0
+    "players.0.hand": []
+    # GR-A02: P2 resolved second, so its Solution is not spent.
+    "players.1.hand": [{ suit: Clarify }]
+  rejects: []

scenarios/ground/gr-a04-bond-support.yaml

@@ -24,7 +24,7 @@ commands:
     args: { action: SUPPORT, target: P3 }
   - actor: P3
     cmd: select_action
-    args: { action: GROUND }
+    args: { action: INVESTIGATE, problem: 3 }
   - actor: SYSTEM
     cmd: reveal
   - actor: SYSTEM

scenarios/ground/gr-a07-bond-flip.yaml

@@ -17,10 +17,10 @@ commands:
     args: { action: ATTACK, target: P2 }
   - actor: P2
     cmd: select_action
-    args: { action: GROUND }
+    args: { action: INVESTIGATE, problem: 3 }
   - actor: P3
     cmd: select_action
-    args: { action: GROUND }
+    args: { action: INVESTIGATE, problem: 3 }
   - actor: SYSTEM
     cmd: reveal
   - actor: SYSTEM

scenarios/ground/gr-a08-rivalry-break.yaml

@@ -22,7 +22,7 @@ commands:
     args: { action: ATTACK, target: P3 }
   - actor: P3
     cmd: select_action
-    args: { action: GROUND }
+    args: { action: INVESTIGATE, problem: 3 }
   - actor: SYSTEM
     cmd: reveal
   - actor: SYSTEM

scenarios/ground/gr-a10-ground-gr.yaml

@@ -0,0 +1,55 @@
+scenario: ground/gr-a10-ground-gr
+description: >
+  GROUND—GR (Ground & Restate): the mode is chosen after Reveal
+  (GR-R05), and on resolution the player takes −2 Stress and readies
+  their Freedom token (GR-A10, GR-F04). Resolution refuses to start
+  while any revealed GROUND still lacks a mode.
+covers: [GR-R05, GR-A10]
+provisional: false
+seed: 42
+setup:
+  players: 3
+  preset: standard-3p
+  patch:
+    "lead": 0
+    "players.0.stress": 5
+    "players.0.freedom_ready": false
+commands:
+  - actor: P1
+    cmd: select_action
+    args: { action: GROUND }
+  - actor: P2
+    cmd: select_action
+    args: { action: INVESTIGATE, problem: 3 }
+  - actor: P3
+    cmd: select_action
+    args: { action: INVESTIGATE, problem: 3 }
+  - actor: SYSTEM
+    cmd: reveal
+  # GR-R05: no mode chosen yet, so resolution is refused.
+  - actor: SYSTEM
+    cmd: resolve
+  # GR-R05: only a player who revealed GROUND may choose a mode.
+  - actor: P2
+    cmd: choose_ground_mode
+    args: { mode: GR }
+  - actor: P1
+    cmd: choose_ground_mode
+    args: { mode: GR }
+  - actor: SYSTEM
+    cmd: resolve
+expect:
+  events:
+    - kind: GroundModeChosen
+      player: 0
+      mode: Gr
+    - kind: StressSet
+      player: 0
+      stress: 3
+    - kind: FreedomReadied
+      player: 0
+  state:
+    "players.0.stress": 3
+    "players.0.freedom_ready": true
+    "step": Resolve
+  rejects: [4, 5]

scenarios/ground/gr-d01-darvo-trigger.yaml

@@ -18,10 +18,10 @@ commands:
     args: { action: ATTACK, target: P2 }
   - actor: P2
     cmd: select_action
-    args: { action: GROUND }
+    args: { action: ATTACK, target: P3 }
   - actor: P3
     cmd: select_action
-    args: { action: GROUND }
+    args: { action: INVESTIGATE, problem: 3 }
   - actor: SYSTEM
     cmd: reveal
   - actor: SYSTEM

scenarios/ground/gr-r02-select.yaml

@@ -21,7 +21,7 @@ commands:
   # GR-R02: one selection per player per round.
   - actor: P1
     cmd: select_action
-    args: { action: GROUND }
+    args: { action: INVESTIGATE, problem: 3 }
 expect:
   events:
     - kind: ActionSelected

scenarios/ground/gr-r06-round-resolve.yaml

@@ -20,7 +20,7 @@ commands:
     args: { action: SUPPORT, target: P3 }
   - actor: P3
     cmd: select_action
-    args: { action: GROUND }
+    args: { action: INVESTIGATE, problem: 3 }
   - actor: SYSTEM
     cmd: reveal
   - actor: SYSTEM