docs: correct the claims that no longer match the code

Four documents asserted things the code contradicts.

ARCHITECTURE's component diagram had the UI calling the autostart Manager
directly. It does not, and must not: src/ui holds no reference to the
package at all — Settings reads svc.AutostartStatus(), like everything else
it reads. The edge is folded into the existing ui→Service one, so the
diagram no longer draws the exception to the project's own rule.

platform/desktop was described in both ARCHITECTURE and DEVELOPMENT as a
"display-scale helper". It installs the .desktop entry and icon under XDG
data home; there is no scale helper in it.

The ~250-line file guideline was written as though the jobs_view and
settings_view splits had settled it. Both files are over it again and
history_view.go has never been split, so the guideline is now stated as
the target it is, with the current state named rather than implied.

STANDARDS pointed at a "CI coverage gate" item that ROADMAP does not have,
while omitting the two it does.

README's gosentry.json sample was three keys short of what the app writes
on first run — default_timeout_seconds, theme and job_list_view — which
made the one file the user is invited to hand-edit the least accurate
thing in the document. The sample is now the real default (verified by
marshalling DefaultConfig), with the keys explained, including why a zero
timeout is written out and an unset one is not. The per-job overrides for
overlap policy and timeout were undocumented despite being in the job
dialog, and the feature list had not caught up with the timeout, the theme,
or the compact job list.

Version numbers in example output paths are now <version>, matching how the
CI section already wrote them, so they cannot go stale again.

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

docs/ARCHITECTURE.md

@@ -17,7 +17,7 @@ src/
   storage/              JSON persistence (gosentry.json, jobs.json)
   platform/
     autostart/          Manager interface + Windows (shortcut) and Linux (XDG) impls
-    desktop/            display-scale helper (Linux only)
+    desktop/            desktop entry + icon under XDG data home (Linux only)
     filemanager/        open a folder in the desktop file manager
     winproc/            hidden-window startup flags (Windows only)
   ui/                   Fyne windows, tabs, and dialogs; reads service via Events
@@ -40,7 +40,7 @@ flowchart LR
     shell["Platform shell - cmd.exe /C or sh -c"]
 
     user -->|"edits jobs, settings, runs commands"| ui
-    ui -->|"CreateJob, UpdateJob, DeleteJob, RunNow, UpdateSettings, …"| svc
+    ui -->|"CreateJob, UpdateJob, DeleteJob, RunNow, UpdateSettings, AutostartStatus, …"| svc
     svc -->|"SaveJobs, SaveConfig, LoadJobs, LoadConfig"| store
     store -->|"read/write"| config
     store -->|"read/write"| jobs
@@ -54,7 +54,6 @@ flowchart LR
     svc -->|"emit JobChanged / RunRecorded / JobsLoaded / ErrorOccurred"| ui
     ui -->|"display jobs, history, status"| user
 
-    ui -->|"SetAutostart, AutostartStatus"| autostart
     svc -->|"Set / Status via Manager"| autostart
 ```
 
@@ -64,7 +63,7 @@ flowchart LR
    `cmd/gosentry` calls `ui.Run`, which creates an `app.Service`, opens the
    store, loads `gosentry.json` and `jobs.json`, subscribes the UI to service
    events, builds the main window, and calls `Service.Start` to begin the
-   scheduler loop. On first launch the service seeds per-job run-time statistics
+   scheduler loop. On every launch the service seeds per-job run-time statistics
    from existing log files so the details panel reflects accumulated history
    immediately (see §Statistics below).
 
@@ -205,8 +204,9 @@ the moment the window opens.
 
 ### `jobs_view.go` file structure
 
-`src/ui/jobs_view.go` is split across three files to stay within the ~250-line
-size guideline:
+The size guideline for a file in this project is ~250 lines. `src/ui/jobs_view.go`
+is split across three files along these seams; the view file itself has grown
+back over the guideline since, and is the next candidate if it grows further:
 
 | File | Contents |
 |------|----------|
@@ -217,7 +217,8 @@ size guideline:
 ### `settings_view.go` file structure
 
 `src/ui/settings_view.go` is split across three files the same way, once its
-own size passed the ~250-line guideline:
+own size passed the guideline. `src/ui/history_view.go` is over it too and has
+not been split:
 
 | File | Contents |
 |------|----------|