test sweep: cover ui/ pure-Dart files (T-91)

Adds test/terminal/ui/ui_pure_test.dart — 39 unit tests covering
the lib/src/terminal/src/ui/ files that don't need a Flutter widget
harness.

Files at 100%:
- palette_builder.dart: 0/52 → 52/52 (named-colour mapping for
  indices 0..15, RGB cube walk for 16..231 with the 95-then-+40
  step pattern, grayscale ramp 232..255, out-of-range clamp).
- paragraph_cache.dart: 2/22 → 22/22 (LRU promotion on read,
  eviction at maxSize, miss returns null, clear empties).
- terminal_text_style.dart: 7/19 → 19/19 (default ctor,
  fromTextStyle fontFamily fallback chain + size/height pass-
  through, toTextStyle attribute threading, copyWith with override
  + no-args clone).
- input_map.dart: 8/20 → 20/20 (keyToTerminalKey hits + null on
  unmapped LogicalKeyboardKey id, charToTerminalKey case-fold +
  multi-char/unknown null).
- terminal_size.dart: 4/8 → 8/8 (operator==/hashCode/toString,
  identity + type-mismatch branches).
- pointer_input.dart: 1/3 → 3/3 (default ctor, .none(), .all()).
- terminal_theme.dart: 1/1 unchanged.
- char_metrics.dart: 0/10 → 10/10 (positive width/height, monotonic
  text-scaler scaling).
- ui/controller.dart: 18/52 → 52/52 (TerminalController default
  state, setSelection + mode override, attached/detached anchor
  selection-getter behaviour, prior-anchor disposal on second
  setSelection, setSelectionMode no-op short-circuit, clearSelection,
  setPointerInputs / setSuspendPointerInput gating,
  highlight register/dispose lifecycle, TerminalHighlight.range
  null on detached anchors).

Enums (selection_mode, cursor_type) and themes constants are
covered transitively — they have no executable lines that lcov
instruments.

Coverage delta:
- Total project: 67.06% → 68.80%; coverage_floor bumped 66 → 68.

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

.pql/pql-plan.json

@@ -1,5 +1,5 @@
 {
-  "exported_at": "2026-05-07T19:05:16Z",
+  "exported_at": "2026-05-08T09:28:17Z",
   "decisions": [
     {
       "id": "D-1",
@@ -9,7 +9,7 @@
       "status": "active",
       "date": "2026-04-20",
       "file_path": "decisions/architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-3",
@@ -19,7 +19,7 @@
       "status": "active",
       "date": "2026-04-20",
       "file_path": "decisions/architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-4",
@@ -29,7 +29,7 @@
       "status": "active",
       "date": "2026-04-20",
       "file_path": "decisions/architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-5",
@@ -39,7 +39,7 @@
       "status": "active",
       "date": "2026-04-20",
       "file_path": "decisions/architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-6",
@@ -49,7 +49,7 @@
       "status": "active",
       "date": "2026-04-20",
       "file_path": "decisions/architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-7",
@@ -59,7 +59,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-8",
@@ -69,7 +69,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-9",
@@ -79,7 +79,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-10",
@@ -89,7 +89,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-11",
@@ -99,7 +99,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-12",
@@ -109,7 +109,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-13",
@@ -119,7 +119,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-14",
@@ -129,7 +129,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-15",
@@ -139,7 +139,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/extensions.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-16",
@@ -149,7 +149,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/extensions.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-17",
@@ -159,7 +159,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/extensions.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-18",
@@ -169,7 +169,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/extensions.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-19",
@@ -179,7 +179,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/extensions.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-20",
@@ -189,7 +189,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/accessibility.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-21",
@@ -199,7 +199,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/accessibility.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-22",
@@ -209,7 +209,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/accessibility.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-23",
@@ -219,7 +219,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/testing.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-24",
@@ -229,7 +229,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/testing.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-25",
@@ -239,7 +239,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/testing.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-26",
@@ -249,7 +249,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/testing.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-27",
@@ -259,7 +259,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/testing.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-28",
@@ -269,7 +269,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/testing.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-29",
@@ -279,7 +279,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/testing.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-30",
@@ -289,7 +289,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/testing.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-31",
@@ -299,7 +299,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/tooling.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-32",
@@ -309,7 +309,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/tooling.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-33",
@@ -319,7 +319,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/tooling.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-34",
@@ -329,7 +329,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/process.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-35",
@@ -339,7 +339,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/process.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-36",
@@ -349,7 +349,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/process.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-37",
@@ -359,7 +359,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/process.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-38",
@@ -369,7 +369,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/process.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-39",
@@ -379,7 +379,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/process.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-40",
@@ -389,7 +389,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/process.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-41",
@@ -399,7 +399,7 @@
       "status": "active",
       "date": "2026-04-22",
       "file_path": "decisions/architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-42",
@@ -409,7 +409,7 @@
       "status": "active",
       "date": "2026-04-22",
       "file_path": "decisions/tooling.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-43",
@@ -419,7 +419,7 @@
       "status": "active",
       "date": "2026-04-22",
       "file_path": "decisions/architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-44",
@@ -429,7 +429,7 @@
       "status": "active",
       "date": "2026-04-22",
       "file_path": "decisions/architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-45",
@@ -439,7 +439,7 @@
       "status": "active",
       "date": "2026-04-22",
       "file_path": "decisions/architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-46",
@@ -449,7 +449,7 @@
       "status": "active",
       "date": "2026-04-22",
       "file_path": "decisions/extensions.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-47",
@@ -459,7 +459,7 @@
       "status": "active",
       "date": "2026-04-22",
       "file_path": "decisions/architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-48",
@@ -469,7 +469,7 @@
       "status": "active",
       "date": "2026-04-22",
       "file_path": "decisions/architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-49",
@@ -479,7 +479,7 @@
       "status": "active",
       "date": "2026-04-22",
       "file_path": "decisions/architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-50",
@@ -489,7 +489,7 @@
       "status": "active",
       "date": "2026-04-22",
       "file_path": "decisions/architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-51",
@@ -499,7 +499,7 @@
       "status": "active",
       "date": "2026-04-22",
       "file_path": "decisions/architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-52",
@@ -509,7 +509,7 @@
       "status": "active",
       "date": "2026-04-22",
       "file_path": "decisions/architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-53",
@@ -519,7 +519,7 @@
       "status": "active",
       "date": "2026-04-22",
       "file_path": "decisions/architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-54",
@@ -529,7 +529,7 @@
       "status": "active",
       "date": "2026-04-22",
       "file_path": "decisions/architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-55",
@@ -539,7 +539,7 @@
       "status": "active",
       "date": "2026-04-23",
       "file_path": "decisions/architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-56",
@@ -549,7 +549,7 @@
       "status": "active",
       "date": "2026-04-23",
       "file_path": "decisions/architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-57",
@@ -559,7 +559,7 @@
       "status": "active",
       "date": "2026-04-23",
       "file_path": "decisions/architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-58",
@@ -569,7 +569,7 @@
       "status": "active",
       "date": "2026-04-23",
       "file_path": "decisions/tooling.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-59",
@@ -579,7 +579,7 @@
       "status": "active",
       "date": "2026-04-25",
       "file_path": "decisions/tooling.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-60",
@@ -589,7 +589,7 @@
       "status": "active",
       "date": "2026-04-26",
       "file_path": "decisions/tooling.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-61",
@@ -599,7 +599,7 @@
       "status": "active",
       "date": "2026-04-26",
       "file_path": "decisions/tooling.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-62",
@@ -609,7 +609,7 @@
       "status": "active",
       "date": "2026-04-26",
       "file_path": "decisions/tooling.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-63",
@@ -619,7 +619,7 @@
       "status": "active",
       "date": "2026-04-26",
       "file_path": "decisions/tooling.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-64",
@@ -629,7 +629,7 @@
       "status": "active",
       "date": "2026-05-03",
       "file_path": "decisions/architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-65",
@@ -639,7 +639,7 @@
       "status": "active",
       "date": "2026-04-26",
       "file_path": "decisions/tooling.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "D-66",
@@ -649,7 +649,7 @@
       "status": "active",
       "date": "2026-05-06",
       "file_path": "decisions/testing.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "Q-1",
@@ -658,7 +658,7 @@
       "title": "Authorisation granularity on the IPC socket",
       "status": "open",
       "file_path": "decisions/questions-architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "Q-2",
@@ -667,7 +667,7 @@
       "title": "Back-pressure on event streams",
       "status": "open",
       "file_path": "decisions/questions-architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "Q-3",
@@ -676,7 +676,7 @@
       "title": "Event persistence + audit/undo",
       "status": "open",
       "file_path": "decisions/questions-architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "Q-4",
@@ -685,7 +685,7 @@
       "title": "`.canvas` schema compatibility with Obsidian",
       "status": "open",
       "file_path": "decisions/questions-architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "Q-5",
@@ -694,7 +694,7 @@
       "title": "IPC wire-format stability + `schema_version:`",
       "status": "open",
       "file_path": "decisions/questions-architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "Q-6",
@@ -703,7 +703,7 @@
       "title": "Window chrome — native frame vs frameless custom",
       "status": "resolved",
       "file_path": "decisions/questions-architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "Q-7",
@@ -712,7 +712,7 @@
       "title": "macOS app bundle signing / notarisation",
       "status": "open",
       "file_path": "decisions/questions-architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "Q-8",
@@ -721,7 +721,7 @@
       "title": "Extension API shape — widgets, subcommands, both?",
       "status": "open",
       "file_path": "decisions/questions-extensions.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "Q-9",
@@ -730,7 +730,7 @@
       "title": "Lua runtime vendoring",
       "status": "open",
       "file_path": "decisions/questions-extensions.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "Q-10",
@@ -739,7 +739,7 @@
       "title": "Extension manifest `schema_version:`",
       "status": "open",
       "file_path": "decisions/questions-extensions.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "Q-11",
@@ -748,7 +748,7 @@
       "title": "Coverage gates — hard thresholds vs soft reporting",
       "status": "open",
       "file_path": "decisions/questions-testing.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "Q-12",
@@ -757,7 +757,7 @@
       "title": "Screen-reader automation (axe-core via Playwright)",
       "status": "open",
       "file_path": "decisions/questions-testing.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "Q-13",
@@ -766,7 +766,7 @@
       "title": "Web production-mode a11y",
       "status": "open",
       "file_path": "decisions/questions-accessibility.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "Q-14",
@@ -775,7 +775,7 @@
       "title": "i18n plurals / gender / date-format tooling",
       "status": "open",
       "file_path": "decisions/questions-accessibility.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "Q-15",
@@ -784,7 +784,7 @@
       "title": "Editor tab — full LSP vs tree-sitter-only highlight",
       "status": "open",
       "file_path": "decisions/questions-process.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "Q-16",
@@ -793,7 +793,7 @@
       "title": "`tree-sitter-dart` grammar maintenance",
       "status": "open",
       "file_path": "decisions/questions-process.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "Q-17",
@@ -802,7 +802,7 @@
       "title": "Icon set growth",
       "status": "open",
       "file_path": "decisions/questions-process.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "Q-18",
@@ -811,7 +811,7 @@
       "title": "Theme hot-reload in release builds",
       "status": "open",
       "file_path": "decisions/questions-process.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "Q-19",
@@ -820,7 +820,7 @@
       "title": "(withdrawn)",
       "status": "resolved",
       "file_path": "decisions/questions-process.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "Q-20",
@@ -829,7 +829,7 @@
       "title": "Kernel DB service — namespaced SQL access?",
       "status": "open",
       "file_path": "decisions/questions-process.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "Q-21",
@@ -838,7 +838,7 @@
       "title": "Pql absorbs planning vs keeps separate",
       "status": "open",
       "file_path": "decisions/questions-architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "Q-22",
@@ -847,7 +847,7 @@
       "title": "Ticket persistence strategy",
       "status": "open",
       "file_path": "decisions/questions-architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "Q-23",
@@ -856,7 +856,7 @@
       "title": "SSH-remote development — run clide against a remote workspace",
       "status": "open",
       "file_path": "decisions/questions-architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "Q-25",
@@ -865,7 +865,7 @@
       "title": "Body text face — mono everywhere vs Josefin Sans UI + mono code",
       "status": "open",
       "file_path": "decisions/questions-architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "Q-26",
@@ -874,7 +874,7 @@
       "title": "Small screen layout (\u003c 1000px)",
       "status": "open",
       "file_path": "decisions/questions-architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "Q-27",
@@ -883,7 +883,7 @@
       "title": "Two-editor split",
       "status": "open",
       "file_path": "decisions/questions-architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "Q-28",
@@ -892,7 +892,7 @@
       "title": "Terminal strip scope — shell only or logs/errors/tests",
       "status": "open",
       "file_path": "decisions/questions-architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "Q-29",
@@ -901,7 +901,7 @@
       "title": "Branch picker location",
       "status": "open",
       "file_path": "decisions/questions-architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "Q-30",
@@ -910,7 +910,7 @@
       "title": "Focus behavior when editor is dirty and viewer is peeked",
       "status": "open",
       "file_path": "decisions/questions-architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "Q-31",
@@ -919,7 +919,7 @@
       "title": "XWayland fallback for frameless — proper Wayland protocol needed",
       "status": "open",
       "file_path": "decisions/questions-architecture.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "R-2",
@@ -929,7 +929,7 @@
       "status": "active",
       "date": "2026-04-20",
       "file_path": "decisions/rejected.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "R-3",
@@ -939,7 +939,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/rejected.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "R-4",
@@ -949,7 +949,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/rejected.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "R-5",
@@ -959,7 +959,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/rejected.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "R-6",
@@ -969,7 +969,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/rejected.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "R-7",
@@ -979,7 +979,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/rejected.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "R-8",
@@ -989,7 +989,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/rejected.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "R-9",
@@ -999,7 +999,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/rejected.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "R-10",
@@ -1009,7 +1009,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/rejected.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "R-11",
@@ -1019,7 +1019,7 @@
       "status": "active",
       "date": "2026-04-21",
       "file_path": "decisions/rejected.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     },
     {
       "id": "R-12",
@@ -1029,7 +1029,7 @@
       "status": "active",
       "date": "2026-04-22",
       "file_path": "decisions/rejected.md",
-      "synced_at": "2026-05-07 19:04:55"
+      "synced_at": "2026-05-08 09:27:22"
     }
   ],
   "decision_refs": [
@@ -2811,6 +2811,15 @@
       "priority": "high",
       "created_at": "2026-05-07 06:33:47",
       "updated_at": "2026-05-07 19:04:55"
+    },
+    {
+      "id": "T-94",
+      "type": "task",
+      "title": "wire pql plan merge as git custom merge driver",
+      "status": "cancelled",
+      "priority": "medium",
+      "created_at": "2026-05-07 19:08:29",
+      "updated_at": "2026-05-07 19:08:52"
     }
   ],
   "ticket_deps": null,
@@ -4496,6 +4505,13 @@
       "old_value": "in_progress",
       "new_value": "done",
       "changed_at": "2026-05-07 19:04:55"
+    },
+    {
+      "ticket_id": "T-94",
+      "field": "status",
+      "old_value": "backlog",
+      "new_value": "cancelled",
+      "changed_at": "2026-05-07 19:08:52"
     }
   ]
 }

pubspec.yaml

@@ -18,7 +18,7 @@ repository: https://github.com/postmeridiem/clide
 
 # Pre-push line-coverage floor. Ratchets up only — see D-66.
 # Reading: `awk -F: '/^coverage_floor:/ {gsub(/ /,"",$2); print $2}' pubspec.yaml`.
-coverage_floor: 66
+coverage_floor: 68
 
 # Project metadata (was project.yaml, folded in per D-056).
 # version: above is the single source of truth. The Makefile reads

test/terminal/ui/ui_pure_test.dart

@@ -0,0 +1,438 @@
+/// Pure-Dart tests for `lib/src/terminal/src/ui/` files that don't
+/// require a Flutter widget harness — palette construction, paragraph
+/// cache, text style, key/char mapping, controller state machine,
+/// small enums + value classes, char-metrics and theme constants.
+library;
+
+import 'package:flutter/services.dart';
+import 'package:flutter/widgets.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+import 'package:clide/src/terminal/src/core/buffer/cell_offset.dart';
+import 'package:clide/src/terminal/src/core/buffer/line.dart';
+import 'package:clide/src/terminal/src/core/buffer/range_block.dart';
+import 'package:clide/src/terminal/src/core/buffer/range_line.dart';
+import 'package:clide/src/terminal/src/core/input/keys.dart';
+import 'package:clide/src/terminal/src/utils/circular_buffer.dart';
+import 'package:clide/src/terminal/src/ui/char_metrics.dart';
+import 'package:clide/src/terminal/src/ui/controller.dart';
+import 'package:clide/src/terminal/src/ui/cursor_type.dart';
+import 'package:clide/src/terminal/src/ui/input_map.dart';
+import 'package:clide/src/terminal/src/ui/palette_builder.dart';
+import 'package:clide/src/terminal/src/ui/paragraph_cache.dart';
+import 'package:clide/src/terminal/src/ui/pointer_input.dart';
+import 'package:clide/src/terminal/src/ui/selection_mode.dart';
+import 'package:clide/src/terminal/src/ui/terminal_size.dart';
+import 'package:clide/src/terminal/src/ui/terminal_text_style.dart';
+import 'package:clide/src/terminal/src/ui/themes.dart';
+
+void main() {
+  group('PaletteBuilder', () {
+    final builder = PaletteBuilder(TerminalThemes.defaultTheme);
+
+    test('build() returns exactly 256 colors', () {
+      final palette = builder.build();
+      expect(palette, hasLength(256));
+    });
+
+    test('first 16 indices map directly to the named theme colors', () {
+      expect(builder.paletteColor(0), TerminalThemes.defaultTheme.black);
+      expect(builder.paletteColor(1), TerminalThemes.defaultTheme.red);
+      expect(builder.paletteColor(2), TerminalThemes.defaultTheme.green);
+      expect(builder.paletteColor(3), TerminalThemes.defaultTheme.yellow);
+      expect(builder.paletteColor(4), TerminalThemes.defaultTheme.blue);
+      expect(builder.paletteColor(5), TerminalThemes.defaultTheme.magenta);
+      expect(builder.paletteColor(6), TerminalThemes.defaultTheme.cyan);
+      expect(builder.paletteColor(7), TerminalThemes.defaultTheme.white);
+      expect(builder.paletteColor(8), TerminalThemes.defaultTheme.brightBlack);
+      expect(builder.paletteColor(9), TerminalThemes.defaultTheme.brightRed);
+      expect(builder.paletteColor(10), TerminalThemes.defaultTheme.brightGreen);
+      expect(builder.paletteColor(11), TerminalThemes.defaultTheme.brightYellow);
+      expect(builder.paletteColor(12), TerminalThemes.defaultTheme.brightBlue);
+      expect(builder.paletteColor(13), TerminalThemes.defaultTheme.brightMagenta);
+      expect(builder.paletteColor(14), TerminalThemes.defaultTheme.brightCyan);
+      expect(builder.paletteColor(15), TerminalThemes.defaultTheme.white);
+    });
+
+    test('index 16 is the start of the 6×6×6 RGB cube — pure black at (0,0,0)', () {
+      // The cube starts with r=g=b=0 and walks the b-axis first by 95, then 40.
+      expect(builder.paletteColor(16), const Color.fromARGB(0xFF, 0, 0, 0));
+    });
+
+    test('cube walks blue → green → red, with first step 95 and subsequent +40', () {
+      // Index 17: b becomes 95.
+      expect(builder.paletteColor(17), const Color.fromARGB(0xFF, 0, 0, 95));
+      // Index 18: b += 40 → 135.
+      expect(builder.paletteColor(18), const Color.fromARGB(0xFF, 0, 0, 135));
+    });
+
+    test('231 is the cube terminus — pure white-ish corner', () {
+      // After a full 6-step walk on each axis, the 6³ cube ends at (255,255,255).
+      expect(builder.paletteColor(231), const Color.fromARGB(0xFF, 255, 255, 255));
+    });
+
+    test('grayscale ramp at 232..255', () {
+      expect(builder.paletteColor(232), const Color(0xff080808));
+      expect(builder.paletteColor(255), const Color(0xffeeeeee));
+    });
+
+    test('out-of-range indices clamp to grayscale endpoints', () {
+      // The implementation falls through to grayscale with clamp(232, 255).
+      expect(builder.paletteColor(999), const Color(0xffeeeeee));
+    });
+  });
+
+  group('ParagraphCache', () {
+    test('caches and retrieves a paragraph by integer key', () {
+      final cache = ParagraphCache(8);
+      const style = TextStyle(fontSize: 14);
+      final p = cache.performAndCacheLayout('a', style, TextScaler.noScaling, 1);
+      expect(cache.getLayoutFromCache(1), same(p));
+      expect(cache.length, 1);
+    });
+
+    test('moves recently-accessed entries to the end (LRU promotion)', () {
+      final cache = ParagraphCache(2);
+      const style = TextStyle(fontSize: 14);
+      cache.performAndCacheLayout('a', style, TextScaler.noScaling, 1);
+      cache.performAndCacheLayout('b', style, TextScaler.noScaling, 2);
+      // Touch key 1 — promotes it.
+      cache.getLayoutFromCache(1);
+      // Inserting a third entry evicts the LRU (key 2).
+      cache.performAndCacheLayout('c', style, TextScaler.noScaling, 3);
+      expect(cache.getLayoutFromCache(1), isNotNull);
+      expect(cache.getLayoutFromCache(2), isNull);
+      expect(cache.getLayoutFromCache(3), isNotNull);
+    });
+
+    test('clear empties the cache', () {
+      final cache = ParagraphCache(4);
+      const style = TextStyle(fontSize: 14);
+      cache.performAndCacheLayout('a', style, TextScaler.noScaling, 1);
+      expect(cache.length, 1);
+      cache.clear();
+      expect(cache.length, 0);
+      expect(cache.getLayoutFromCache(1), isNull);
+    });
+
+    test('miss on a never-set key returns null', () {
+      final cache = ParagraphCache(2);
+      expect(cache.getLayoutFromCache(99), isNull);
+    });
+  });
+
+  group('TerminalStyle', () {
+    test('default constructor uses the documented defaults', () {
+      const s = TerminalStyle();
+      expect(s.fontSize, 13.0);
+      expect(s.height, 1.2);
+      expect(s.fontFamily, 'monospace');
+      expect(s.fontFamilyFallback, contains('Menlo'));
+    });
+
+    test('fromTextStyle picks fontFamily, falling back through fontFamilyFallback', () {
+      final s1 = TerminalStyle.fromTextStyle(const TextStyle(fontFamily: 'Hack'));
+      expect(s1.fontFamily, 'Hack');
+
+      final s2 = TerminalStyle.fromTextStyle(const TextStyle(fontFamilyFallback: ['Mono', 'Courier']));
+      expect(s2.fontFamily, 'Mono');
+
+      final s3 = TerminalStyle.fromTextStyle(const TextStyle());
+      expect(s3.fontFamily, 'monospace');
+    });
+
+    test('fromTextStyle picks fontSize / height / fontFamilyFallback through to TerminalStyle', () {
+      final s = TerminalStyle.fromTextStyle(
+        const TextStyle(fontSize: 18, height: 1.5, fontFamilyFallback: ['Mono']),
+      );
+      expect(s.fontSize, 18);
+      expect(s.height, 1.5);
+      expect(s.fontFamilyFallback, ['Mono']);
+    });
+
+    test('toTextStyle threads attribute flags into the resulting TextStyle', () {
+      const s = TerminalStyle(fontSize: 16);
+      final t = s.toTextStyle(
+        color: const Color(0xFF112233),
+        bold: true,
+        italic: true,
+        underline: true,
+      );
+      expect(t.fontSize, 16);
+      expect(t.fontWeight, FontWeight.bold);
+      expect(t.fontStyle, FontStyle.italic);
+      expect(t.decoration, TextDecoration.underline);
+      expect(t.color, const Color(0xFF112233));
+    });
+
+    test('copyWith overrides only specified fields', () {
+      const s = TerminalStyle(fontSize: 14);
+      final copied = s.copyWith(fontSize: 20);
+      expect(copied.fontSize, 20);
+      expect(copied.fontFamily, s.fontFamily); // unchanged
+    });
+
+    test('copyWith with no arguments returns a value-equal clone', () {
+      // Hits the `?? this.X` right-hand side for every parameter.
+      const s = TerminalStyle(fontSize: 14);
+      final clone = s.copyWith();
+      expect(clone.fontSize, s.fontSize);
+      expect(clone.height, s.height);
+      expect(clone.fontFamily, s.fontFamily);
+      expect(clone.fontFamilyFallback, s.fontFamilyFallback);
+    });
+  });
+
+  group('input_map', () {
+    test('keyToTerminalKey maps logical keys 1:1', () {
+      expect(keyToTerminalKey(LogicalKeyboardKey.arrowUp), TerminalKey.arrowUp);
+      expect(keyToTerminalKey(LogicalKeyboardKey.keyA), TerminalKey.keyA);
+      expect(keyToTerminalKey(LogicalKeyboardKey.escape), TerminalKey.escape);
+    });
+
+    test('keyToTerminalKey returns null for an unmapped logical key', () {
+      // gameButtonStart is mapped; pick something that is not — there's no
+      // TerminalKey for `LogicalKeyboardKey.colon`, etc. Verify by walking
+      // a synthesized key id.
+      const synthetic = LogicalKeyboardKey(0xDEADBEEF);
+      expect(keyToTerminalKey(synthetic), isNull);
+    });
+
+    test('charToTerminalKey maps a single ASCII char (case-insensitive)', () {
+      expect(charToTerminalKey('a'), TerminalKey.keyA);
+      expect(charToTerminalKey('A'), TerminalKey.keyA);
+      expect(charToTerminalKey('1'), TerminalKey.digit1);
+    });
+
+    test('charToTerminalKey returns null for multi-char strings or unknown chars', () {
+      expect(charToTerminalKey('ab'), isNull);
+      expect(charToTerminalKey(''), isNull);
+      // Some printable characters don't have keytab mappings (e.g. ¥ ñ).
+      expect(charToTerminalKey('¥'), isNull);
+    });
+  });
+
+  group('TerminalSize', () {
+    test('value semantics — operator== / hashCode / toString', () {
+      const a = TerminalSize(80, 24);
+      const b = TerminalSize(80, 24);
+      const c = TerminalSize(100, 24);
+      expect(a, b);
+      expect(a.hashCode, b.hashCode);
+      expect(a, isNot(c));
+      expect(a.toString(), 'TerminalSize(80, 24)');
+      // identity branch
+      expect(identical(a, a), isTrue);
+      // type-mismatch branch (typed Object so we don't trip the unrelated lint)
+      const Object notASize = 'not a size';
+      expect(a == notASize, isFalse);
+    });
+  });
+
+  group('PointerInputs', () {
+    test('default constructor wraps the supplied set', () {
+      const p = PointerInputs({PointerInput.tap, PointerInput.drag});
+      expect(p.inputs, {PointerInput.tap, PointerInput.drag});
+    });
+
+    test('.none() is empty; .all() contains every PointerInput value', () {
+      expect(const PointerInputs.none().inputs, isEmpty);
+      expect(const PointerInputs.all().inputs, PointerInput.values.toSet());
+    });
+  });
+
+  group('SelectionMode + TerminalCursorType enums', () {
+    test('all enum values exist and are distinct', () {
+      expect(SelectionMode.values, [SelectionMode.line, SelectionMode.block]);
+      expect(TerminalCursorType.values, [
+        TerminalCursorType.block,
+        TerminalCursorType.underline,
+        TerminalCursorType.verticalBar,
+      ]);
+    });
+  });
+
+  group('TerminalThemes (bundled themes are well-formed)', () {
+    test('defaultTheme exposes the documented core palette', () {
+      const t = TerminalThemes.defaultTheme;
+      expect(t.foreground, const Color(0XFFCCCCCC));
+      expect(t.background, const Color(0XFF1E1E1E));
+      expect(t.brightWhite, const Color(0XFFFFFFFF));
+    });
+
+    test('whiteOnBlack and any other bundled themes are valid TerminalTheme instances', () {
+      // Touch every static field that PaletteBuilder needs so that any
+      // missing field would surface as an error here, before runtime.
+      const t = TerminalThemes.whiteOnBlack;
+      final palette = PaletteBuilder(t).build();
+      expect(palette, hasLength(256));
+    });
+  });
+
+  group('calcCharSize (char_metrics)', () {
+    test('returns positive-width / positive-height for a default style', () {
+      const style = TerminalStyle();
+      final size = calcCharSize(style, TextScaler.noScaling);
+      expect(size.width, greaterThan(0));
+      expect(size.height, greaterThan(0));
+    });
+
+    test('text-scaler scales the size monotonically', () {
+      const style = TerminalStyle();
+      final small = calcCharSize(style, const TextScaler.linear(1.0));
+      final big = calcCharSize(style, const TextScaler.linear(2.0));
+      expect(big.width, greaterThan(small.width));
+      expect(big.height, greaterThan(small.height));
+    });
+  });
+
+  group('TerminalController', () {
+    test('default state: no selection, no highlights, line mode, tap-only inputs', () {
+      final c = TerminalController();
+      addTearDown(c.dispose);
+      expect(c.selection, isNull);
+      expect(c.highlights, isEmpty);
+      expect(c.selectionMode, SelectionMode.line);
+      expect(c.suspendedPointerInputs, isFalse);
+      expect(c.pointerInput.inputs, {PointerInput.tap});
+    });
+
+    test('setSelection records anchors and notifies listeners', () {
+      final c = TerminalController();
+      addTearDown(c.dispose);
+      var notifs = 0;
+      c.addListener(() => notifs++);
+
+      // Build a pair of attached anchors via a ring + line.
+      final ring = IndexAwareCircularBuffer<BufferLine>(4);
+      final line = BufferLine(8);
+      ring.push(line);
+      final base = line.createAnchor(0);
+      final extent = line.createAnchor(2);
+
+      c.setSelection(base, extent);
+      expect(notifs, 1);
+      expect(c.selection, isA<BufferRangeLine>());
+      expect(c.selection!.begin, const CellOffset(0, 0));
+      expect(c.selection!.end, const CellOffset(2, 0));
+    });
+
+    test('setSelection mode override switches to block range', () {
+      final c = TerminalController();
+      addTearDown(c.dispose);
+      final ring = IndexAwareCircularBuffer<BufferLine>(4);
+      final line = BufferLine(8);
+      ring.push(line);
+      final base = line.createAnchor(0);
+      final extent = line.createAnchor(3);
+      c.setSelection(base, extent, mode: SelectionMode.block);
+      expect(c.selectionMode, SelectionMode.block);
+      expect(c.selection, isA<BufferRangeBlock>());
+    });
+
+    test('selection getter returns null when an anchor is detached', () {
+      final c = TerminalController();
+      addTearDown(c.dispose);
+      // Anchors not attached to a circular buffer are detached by definition.
+      final detachedLine = BufferLine(8);
+      final base = detachedLine.createAnchor(0);
+      final extent = detachedLine.createAnchor(2);
+      c.setSelection(base, extent);
+      expect(c.selection, isNull);
+    });
+
+    test('setSelection a second time disposes the previous anchors', () {
+      final c = TerminalController();
+      addTearDown(c.dispose);
+      final ring = IndexAwareCircularBuffer<BufferLine>(4);
+      final line = BufferLine(8);
+      ring.push(line);
+      final base1 = line.createAnchor(0);
+      final extent1 = line.createAnchor(2);
+      c.setSelection(base1, extent1);
+      expect(line.anchors.length, 2);
+
+      // Replace with new anchors — old ones should be dropped from the line.
+      final base2 = line.createAnchor(3);
+      final extent2 = line.createAnchor(5);
+      c.setSelection(base2, extent2);
+      expect(line.anchors.length, 2);
+      expect(line.anchors.contains(base2), isTrue);
+      expect(line.anchors.contains(extent2), isTrue);
+      expect(line.anchors.contains(base1), isFalse);
+    });
+
+    test('setSelectionMode is a no-op when the new mode equals the old', () {
+      final c = TerminalController();
+      addTearDown(c.dispose);
+      var notifs = 0;
+      c.addListener(() => notifs++);
+      c.setSelectionMode(SelectionMode.line); // same as default
+      expect(notifs, 0);
+      c.setSelectionMode(SelectionMode.block);
+      expect(notifs, 1);
+      expect(c.selectionMode, SelectionMode.block);
+    });
+
+    test('clearSelection drops anchors and notifies', () {
+      final c = TerminalController();
+      addTearDown(c.dispose);
+      final ring = IndexAwareCircularBuffer<BufferLine>(4);
+      final line = BufferLine(8);
+      ring.push(line);
+      c.setSelection(line.createAnchor(0), line.createAnchor(2));
+      var notifs = 0;
+      c.addListener(() => notifs++);
+      c.clearSelection();
+      expect(c.selection, isNull);
+      expect(notifs, 1);
+    });
+
+    test('setPointerInputs and setSuspendPointerInput notify and update the gate', () {
+      final c = TerminalController();
+      addTearDown(c.dispose);
+      var notifs = 0;
+      c.addListener(() => notifs++);
+
+      c.setPointerInputs(const PointerInputs({PointerInput.scroll, PointerInput.drag}));
+      expect(notifs, 1);
+      expect(c.shouldSendPointerInput(PointerInput.scroll), isTrue);
+      expect(c.shouldSendPointerInput(PointerInput.tap), isFalse);
+
+      c.setSuspendPointerInput(true);
+      expect(c.suspendedPointerInputs, isTrue);
+      expect(notifs, 2);
+      // Suspended → all queries return false even if the input is in the set.
+      expect(c.shouldSendPointerInput(PointerInput.scroll), isFalse);
+    });
+
+    test('highlight registers + auto-removes via Disposable', () {
+      final c = TerminalController();
+      addTearDown(c.dispose);
+      final ring = IndexAwareCircularBuffer<BufferLine>(4);
+      final line = BufferLine(8);
+      ring.push(line);
+      final p1 = line.createAnchor(0);
+      final p2 = line.createAnchor(3);
+
+      final h = c.highlight(p1: p1, p2: p2, color: const Color(0xFF112233));
+      expect(c.highlights, contains(h));
+      // Range from highlight resolves to the same span via attached anchors.
+      expect(h.range, isA<BufferRangeLine>());
+
+      h.dispose();
+      expect(c.highlights, isNot(contains(h)));
+    });
+
+    test('TerminalHighlight.range returns null when its anchors are detached', () {
+      final c = TerminalController();
+      addTearDown(c.dispose);
+      // Anchors on a non-attached line.
+      final freeLine = BufferLine(8);
+      final p1 = freeLine.createAnchor(0);
+      final p2 = freeLine.createAnchor(2);
+      final h = c.highlight(p1: p1, p2: p2, color: const Color(0xFFAA0000));
+      expect(h.range, isNull);
+    });
+  });
+}