docs: multi-value reminders + new components; drop stray README conflict marker

Record core-reminders (multi-value) and the new components in CHANGELOG,
README module table and the ROADMAP extracted list; clarify that only the
reminder *scheduler* stays app-local. Also removes a leftover '>>>>>>> origin/main'
merge-conflict marker committed in README by an earlier merge.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

CHANGELOG.md

@@ -37,13 +37,29 @@ are no binary releases; "version" tracks the shared `version` in the root build
   - `InlineTextField` — the borderless tonal text input (capitalization is a
     parameter).
   - `OptionCard` — the sanctioned selection-dialog pick.
-  - `CollapsingScaffold` — the collapsing settings/sub-screen scaffold.
+  - `CollapsingScaffold` — the collapsing settings/sub-screen scaffold; set
+    `largeTopBar = false` for a pinned single-line bar (the picker variant).
   - `FullScreenPicker` / `OptionPicker` — the full-screen single-select picker.
+  - `ReorderableColumn` — dependency-free drag-to-reorder for the short, fixed
+    grouped-card Settings lists; pairs with `GroupedRow(gapBelow = false)`, which
+    hands the column uniform control of row spacing.
+  - `DebugRibbon` — a stark, un-themed "DEBUG" corner ribbon; gate on
+    `BuildConfig.DEBUG` at the call site.
+  - `InlineTextField` gained `enabled` (a disabled field dims to a locked value).
   - `pastelize()` — softens a raw provider colour to a theme-fitting pastel.
 
   App-agnostic by design: apps compose their own screens and keep their own
   identity chips/icons. String resources here (e.g. `back`) are fallbacks an app
   can override.
+- **`core-reminders`** (JVM library) — the app-agnostic reminder-override model:
+  `ReminderOverride` (`Inherit` / `None` / `Minutes`), where `Minutes` carries a
+  **list** of lead-times so a target can hold several reminders at once (an app
+  that offers a single reminder just uses a one-element list). Map helpers
+  (`reminderOverrideFor`, `reminderLeadsFor`, `applyReminderOverride`,
+  `reminderOverrideForMinutes`, `normalizeReminders`) plus `ReminderOverrideCodec`
+  (three configurable separators; single legacy values round-trip byte-identically)
+  and the lead-time unit model (`ReminderUnit`, `decomposeReminderMinutes`). The
+  labels/presets and the alarm scheduler stay per-app.
 
 ### Conventions