Add live HUD button visibility controls to Mod Settings

[Guffawaffle]

Adds Settings → Mod Settings → HUD Buttons with Q's Trials, Field Training, Outposts and Missions groups. Each offers Auto / Always / Never and summarizes its current mode while collapsed. Changes apply live and persist through the shared TOML writer.

Auto reevaluates native visibility rules; Missions restores its tracked native visibility. Weak object tracking, replacement-button capture, inactive-view deferral and hook-availability checks protect unavailable HUD views. Following #313, the existing default-enabled missionhudtweakshooks switch owns installation independently of feature values. Callbacks reread current modes before overrides or Auto restoration; complete metadata and partial-family guards come from #296.

Depends on corrected #282 and #296. Validation: Windows release build, existing settings fixtures, full persistence fixtures (including all twelve HUD setting/mode combinations) and all 11 example TOMLs passed. Final documentation changes leave compiled code unchanged. Three independent semantic reviews cover the complete candidate. Static Windows 270 overwrite windows fit; exact-candidate game smoke, macOS native fit/execution and injected lifecycle/partial-install failures remain open. Earlier integration testing is historical evidence, not qualification of this exact artifact. CI starts on publication without waiting for results.

[Guffawaffle]

Hook/feature alignment follow-up for #313

Follow-up to #313: keep hook installation independent of feature enablement, with default-enabled compatibility switches under [patches] and feature checks inside the installed hooks.

Refresh both parents: corrected HUD repair #296 and corrected settings controls #282. Preserve [patches].missionhudtweakshooks instead of overwriting installMissionHudTweaksHooks with true or deriving it from MissionHudTweaksEnabled(). Keep current [ui].hud_q_trials, hud_field_training, hud_outposts, and hud_missions checks, Auto restoration and object-lifetime safeguards. Carry the native-settings/Forbidden Tech/fleet-label fixes from #282 here too. This is a sibling of #285/#293; do not import their feature code while refreshing the shared parent.

Settings cascade (verified from current branch ancestry): #279 → #280; #277 + #280 → #281 → #282; sibling branches from #282 are #285, #293 and #297. #285 additionally depends on #269; #297 additionally depends on #296. Correct the owning parent first, then carry the fix through every dependent branch while preserving each sibling's scope.

Implemented in f33d8e7 with corrected #282 and #296 parents. The independent mission patch switch controls installation; live controls retain weak tracking, native refresh and Missions Auto restoration, with current modes checked before use. HUD page docs now match registration. Windows build, settings/full persistence including twelve HUD combinations, example TOMLs and three semantic lanes passed on unchanged compiled source. CI is queued; exact-artifact game/Mac qualification remains open.