Implement general.focus_follows_mouse/auto_raise; remove the rest as dead

Auditing "clicking behavior and basics": general.focus_follows_mouse,
general.mouse_follows_focus, general.auto_raise, general.auto_focus,
the entire window.* namespace (8 more keys, a full duplicate of the
same four plus remember_position/size/state), and general.
smart_placement/border_width were all seeded into default_config() and
documented in DEFAULTS.md, but none were read anywhere - srd.set()/
srd.get() on any of them silently succeeded while doing nothing.

focus_follows_mouse is real, well-defined, and directly relevant to
clicking basics - implemented it plus auto_raise (raise, not just
focus, on hover) rather than just deleting the promise like the
others. WindowManager gained focus_follows_mouse/auto_raise bools,
wired from apply_general_settings the same way every other general.*
flag is. handle_pointer_position now tracks whichever window (content
or decoration) is under the pointer and, when the setting is on and
that differs from the currently-focused window, focuses it through the
same focus_window() free function every click-driven focus change
already uses (real keyboard focus, not just core state) - skipped
entirely while dragging/resizing or over a layer-shell surface, so the
pointer sweeping over other windows mid-drag or hovering a bar can't
steal focus from what's actually being manipulated.

mouse_follows_focus (pointer warp on keybinding-driven focus change)
and auto_focus (no clear distinct meaning beyond click-to-focus) stay
unimplemented and are now undocumented rather than promised.

1 files changed, 16 insertions, 15 deletions

diff --git a/docs/DEFAULTS.md b/docs/DEFAULTS.md
index 972e330..4b4e195 100644
--- a/docs/DEFAULTS.md
+++ b/docs/DEFAULTS.md
@@ -8,19 +8,23 @@ This document describes all default configuration values and available options f
 ### Global Settings (`general.*`)
 ```lua
 srd.set("general.default_layout", "dynamic")           -- Default: "dynamic"
-srd.set("general.smart_placement", true)               -- Default: true
 srd.set("general.window_gap", 8)                       -- Default: 8
-srd.set("general.border_width", 2)                     -- Default: 2
 srd.set("general.animations", true)                    -- Default: true
 srd.set("general.animation_duration", 200)             -- Default: 200ms
 srd.set("general.shadows", true)                       -- Default: true
 srd.set("general.resize_margin", 6)                    -- Default: 6px
 srd.set("general.rounded_corners", true)               -- Default: true on GLES/winit, false on udev/Pixman (opt-in there)
-srd.set("general.focus_follows_mouse", false)          -- Default: false
-srd.set("general.mouse_follows_focus", true)           -- Default: true
-srd.set("general.auto_raise", false)                   -- Default: false
-srd.set("general.auto_focus", true)                    -- Default: true
+srd.set("general.focus_follows_mouse", false)          -- Default: false - hover a window to focus it, no click needed
+srd.set("general.auto_raise", false)                   -- Default: false - also raise on hover-focus, not just focus
 ```
+`general.smart_placement`/`general.border_width` are not listed: neither
+is implemented - new-window placement always uses smart placement
+unconditionally (no toggle exists), and the real, working border-width
+setting is `theme.decorations.border.width` below.
+`general.mouse_follows_focus` (warp the pointer to match a keybinding-
+driven focus change) and `general.auto_focus` (no clear distinct meaning
+found beyond what plain click-to-focus already does) aren't implemented
+either.
 
 ### Monitor Settings (`monitor.*`)
 ```lua
@@ -34,15 +38,12 @@ workspace"/"this monitor's workspace count" to configure. `workspace.count`
 below is the actual knob.
 
 ### Window Behavior (`window.*`)
-```lua
-srd.set("window.focus_follows_mouse", false)           -- Default: false
-srd.set("window.mouse_follows_focus", true)            -- Default: true
-srd.set("window.auto_raise", false)                    -- Default: false
-srd.set("window.auto_focus", true)                     -- Default: true
-srd.set("window.raise_on_focus", true)                 -- Default: true
-srd.set("window.remember_position", true)              -- Default: true
-srd.set("window.remember_size", true)                  -- Default: true
-srd.set("window.remember_state", true)                 -- Default: true
+Not implemented: this whole namespace duplicated `general.*`'s own focus
+keys (see above for the two of those that are real) plus three genuinely
+unbuilt per-app-window-state-persistence keys (`remember_position`/
+`remember_size`/`remember_state` - no window remembers anything about a
+previous run; every new window starts at a hardcoded size, see
+`crates/wayland/src/xwayland.rs`/`state/lifecycle.rs`'s `new_managed_window`).
 ```
 
 ### Workspace Settings (`workspace.*`)