feat(ui): Campaign OP slice OP6 — the Config tab

Binds the retail Options panel's Config tab (LayoutDesc 0x21000029, 27
authored rows across 6 sections) through OP2's template mechanism and
OP3's per-page OptionPage model, matching the Character/Chat tab
controllers' established pattern.

The row table is transcribed directly from two decompiled sources —
gmConfigUI::InitOptions @0x0049E400 (row order, widget shape, defaults)
and gmClient::InitUIPreferences @0x004035b0 (the complete
UIPreferences::AttachPreference registration: every label/tooltip key,
every slider's real-unit range, every menu's enum choices) — which
resolves the research docs' own "U4" unverified slider-caption pairing:
retail ships ZERO range captions on this tab (every SetSliderLabel call
passes literal string id 0).

Consumer disposition: LIVE — Sound/Ambient volume-trio sliders and their
toggle halves (AudioSettings.SfxDisabled/AmbientDisabled now gate the
already-live engine write; RuntimeSettingsController.SaveAudio newly
pushes into OpenAlAudioEngine on every change, not just at startup),
Resolution/Full Screen (immediate window resize on save). NEXT-LAUNCH
(pre-existing precedent): Sync To Refresh, Field of View. STORE-ONLY
(register rows AP-198/199/200, TS-74 extended): Sound Features/Interface
trio/Play-Only-When-Active, the nine Graphics/Rendering-Quality rows
(Vulkan has no per-feature render knobs), Camera/Input's six rows and
Use Mouse Turning (no persistent mouse-turning camera mode), Chat Font
Face/Size (distinct new fields from the existing live ChatSettings.FontSize).

AudioSettings/DisplaySettings/CameraTurningSettings/ChatSettings each
gain new fields for their slice of the 27 rows, backed by SettingsStore
round-trips. A real bug caught by testing: the scrollbar scope lookup
used the standalone-layout root id (0x100001FF), which does not survive
base-merge into the host-mounted tree — fixed to scope from the tab
host's own page-slot id (0x10000213), matching Chat's established
pattern for the same shared-scrollbar-id hazard (0x10000201, authored by
both the Chat and Config ListBoxes).

30 new tests (27 authored rows register as 30 IOptionRow instances — the
three toggle+slider trios each register two). Full Release suite:
13,107 passed / 4 skipped / 0 failed (was 13,083/4/0 — net +24, the one
existing RuntimeSettingsControllerTests case updated for SaveAudio's new
live-apply call, not a regression).

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

docs/research/2026-08-11-campaign-op-test-script.md

@@ -1,6 +1,6 @@
 # Campaign OP connected-gate test script
 
-**Status:** OP3, OP4, OP5, and OP7 sections. Later slices (OP6, OP8) append
+**Status:** OP3, OP4, OP5, OP6, and OP7 sections. Later slices (OP8) append
 their own sections here as they land; the campaign's OP9 closeout gate is
 this document complete plus every slice code-complete.
 
@@ -509,6 +509,157 @@ chat windows already read when deciding which lines to show.
 
 ---
 
+## OP6 — the Config tab
+
+The Config tab (`0x21000029`) has six sections: **Sound Options** (5 rows —
+a menu, three toggle+slider volume trios, one toggle), **Camera Options** (4
+rows), **Graphics Options** (7 rows), **Rendering Quality Options** (6
+rows), **Input Options** (3 rows), **UI Options** (2 rows) — 27 authored
+rows total, byte-verified directly from `gmConfigUI::InitOptions
+@0x0049E400` and `gmClient::InitUIPreferences @0x004035b0` (the retail
+registration table that supplies every row's label/tooltip/range/enum-
+choice — a stronger source than this campaign's own research docs, which
+had left the slider-caption pairing explicitly UNVERIFIED; OP6 resolved it:
+**retail ships zero range captions on this tab** — do not expect
+"Dark/Bright"-style low/high labels on any slider).
+
+### Opening the tab and reading the rows
+
+1. **Open the Options panel (F11) and click the Config tab.** Six section
+   headers appear top-to-bottom: **Sound Options**, **Camera Options**,
+   **Graphics Options**, **Rendering Quality Options**, **Input Options**,
+   **UI Options**. Every row has a label (a menu dropdown, a checkbox, or a
+   slider — three of the Sound rows are a combined checkbox+slider in one
+   row). If ANY row shows no label at all, that is a DAT string-resolution
+   miss worth reporting (the code deliberately renders nothing rather than
+   invented English when a string fails to resolve).
+2. **Scroll the list** via the scrollbar. All 27 rows are reachable; the
+   list does not clip or overlap the Apply/Reset/Defaults buttons at the
+   bottom.
+
+### Live rows — audio
+
+3. **Drag the "Sound Effects" slider (first Sound Options trio) while a
+   sound effect is audibly looping or repeating** (e.g. stand near an
+   ambient sound source, or trigger a combat/UI sound repeatedly). The
+   volume should change LIVE, continuously, as you drag — not just on
+   release.
+4. **Check the "Disable Sound Effects" checkbox** (the SAME row's toggle
+   half). Sound effects should go SILENT immediately, regardless of where
+   the slider is set. Uncheck it — sound effects resume at the slider's
+   current level.
+5. **Repeat steps 3-4 for the "Ambient Sound" trio** (the second row) using
+   an ambient loop (wind, water, torches) as your audible test — same live
+   drag + mute-on-check behaviour.
+6. **Note the retail-faithful surprise:** on a FRESH character (never
+   touched these settings), BOTH "Disable Sound Effects" and "Disable
+   Ambient Sound" checkboxes are CHECKED by default — i.e., sound starts
+   MUTED out of the box. This is retail's own byte-verified 2013 EoR
+   default (`gmConfigUI::InitOptions`'s `SetDefaultValue(1, ...)` on both
+   trios), reproduced faithfully — **not a bug**, however counterintuitive.
+   Uncheck both to hear anything.
+7. **Drag the third slider / check its toggle ("Disable Interface Sound",
+   third trio).** Expect NO audible change either way — this is retail's
+   OWN dead knob (register row AP-174/AP-199): retail registers this
+   preference and then never reads it; UI/interface sounds are always
+   scaled by the Sound Effects slider instead. Confirm the row is
+   clickable/draggable and does not crash; do not expect it to do anything.
+
+### Live rows — display
+
+8. **Open the Resolution menu (Graphics Options, first row) and pick a
+   different resolution.** The window should resize IMMEDIATELY, live, no
+   restart needed.
+9. **Toggle "Full Screen".** The window should switch between windowed and
+   fullscreen IMMEDIATELY, live.
+10. **Toggle "Sync To Refresh" (VSync) and drag the "Field of View"
+    slider.** Both persist to `settings.json`, but — matching this
+    project's pre-existing (not new) behaviour for these two fields —
+    neither re-applies until the NEXT LAUNCH. Do not expect an immediate
+    visual change; do a full relaunch afterward (step 15) to confirm the
+    new value took effect at startup.
+
+### Store-only rows — no observable effect is the CONTRACTED behaviour
+
+11. **Sound Features menu (Stereo/Mono), Play Sound Only When Active
+    toggle.** No consumer exists (register row AP-199). Confirm they're
+    clickable and persist (step 14); expect no audible/behavioural change.
+12. **Screen Brightness slider, Automatic Degrades toggle, Graphics
+    Performance slider, Degrade Distance slider, the four Rendering
+    Quality menus (Landscape/Environment Texture Detail, Texture
+    Filtering, Landscape Draw Distance), Building Detail Textures,
+    Multi-Pass Alpha.** No consumer exists — acdream's Vulkan renderer is
+    driven by one aggregate quality preset, not these per-feature knobs
+    (register row AP-198). Confirm every one is clickable/draggable and
+    persists; expect zero visual change from any of them. **Landscape
+    Draw Distance specifically may show NO highlighted item** even right
+    after Defaults — that is retail's own decompiled data being
+    ambiguous (AP-198's own sub-note), not a rendering bug.
+13. **Mouse Look Sensitivity slider, Invert Mouselook Y Axis toggle, Use
+    Mouse Turning toggle (Input Options), Camera Stiffness/Adjustment
+    Speed sliders, Align To Slope toggle (Camera Options), Chat Font
+    Face/Size menus (UI Options).** No consumer exists for any of these
+    six Camera/Input rows (register row TS-74 — the SAME "no persistent
+    mouse-turning camera mode" gap the Gameplay tab's macro already
+    exposed) or the two Chat font rows (register row AP-200 — distinct
+    fields from the chat panel's own separately-live font-size control,
+    wherever that is currently exposed). Confirm all eight are
+    clickable/draggable and persist; expect no visual/audible change.
+
+### Apply/Reset/Defaults
+
+14. **Toggle a mix of row types (a checkbox, a slider, a menu selection),
+    then click Reset.** Every row you touched reverts to its
+    last-shown/Applied value — live audio/display rows revert their
+    ACTUAL effect too (sound un-mutes or re-mutes, resolution changes
+    back), not just the checkbox art.
+15. **Click Defaults.** Every row jumps LIVE to retail's byte-verified
+    default (Sound/Ambient trios back to muted+100% volume, Resolution to
+    800×600, Full Screen on, Camera Stiffness to 0.45, etc.) — Apply/Reset
+    light up afterward if anything actually changed (Defaults never
+    commits by itself).
+16. **Switch to another tab (e.g. Gameplay) without clicking Apply after
+    an edit.** Uncommitted edits silently revert — switching tabs is a
+    Reset, not a save.
+
+### Persistence — local-only, survives relaunch
+
+17. **Set a distinctive combination** (e.g. unmute Sound Effects at 40%
+    volume, pick a non-default Resolution, drag Field of View partway) —
+    every row here writes to `settings.json` on change, not just on
+    Apply.
+18. **Fully relaunch the client** (close the window, start a new
+    process — a relog is not required, this is all local-only state).
+    Reopen the Options panel's Config tab — every row (live AND
+    store-only) should read back at your set values. The Sync To
+    Refresh/Field Of View rows deferred to next-launch (step 10) should
+    now ALSO be visibly applied (window vsync behaviour / camera FOV).
+
+### What to report
+
+- Any section/row/label missing, or a slider showing a low/high range
+  caption (retail ships none on this tab — see this section's own intro).
+- A live row (Sound/Ambient volume+mute, Resolution, Full Screen) that
+  does not change live, or a store-only row that unexpectedly DOES change
+  something (a sign its "no consumer" premise is stale).
+- Reset/Defaults not behaving as described in 14-15.
+- Any row that fails to persist across a full relaunch (step 18),
+  including the two next-launch-only rows (Sync To Refresh, Field of
+  View) not taking effect at the NEXT startup.
+- Any crash, freeze, or scroll glitch anywhere in the 27-row list.
+
+### Explicitly NOT in scope for this gate
+
+- Any audible/visual change from the store-only rows listed in steps
+  11-13 — no acdream consumer exists for any of them (register rows
+  AP-198, AP-199, AP-200, TS-74).
+- The camera actually turning from "Use Mouse Turning" (Config tab OR the
+  Gameplay tab's macro) — no persistent mouse-turning camera mode exists
+  (TS-74, already covered by OP3's gate).
+- Configure Keyboard — OP8.
+
+---
+
 ## OP7 — headless `characterOptions`
 
 Unlike OP3-OP6, this is not a graphical-client gate: no window is launched.