[#136] Add Slack admin modals + App Home admin section (#141)

* Add Slack admin modals + App Home admin section

Replace the two most error-prone positional admin commands with Block Kit
modals (override and holiday-add) opened from a new App Home admin section,
while keeping the typed subcommands as a fallback. Validation and side
effects are factored into shared helpers so the modal and command paths
can't drift, and every action/view handler re-checks is_admin against
get_admin_users() so a modal opened from Home can't bypass authorization.
Adds Schedule.list_overrides for the upcoming-overrides overview.

Refs: #136

* Update changelog date to July 02, 2026

* Add point-and-click admin actions in Slack for easier overrides and holidays

* [#136] Add admin UI evaluation spike doc (#140)

Co-authored-by: seahaven-openswe[bot] <296972425+seahaven-openswe[bot]@users.noreply.github.com>
Co-authored-by: amoussa1229 <166072409+amoussa1229@users.noreply.github.com>

CHANGELOG.md

@@ -10,6 +10,23 @@ fine and still supported.
 
 ---
 
+## v1.14.0 — July 2, 2026
+
+**Point-and-click admin actions, right inside Slack.** Admins no longer have to
+remember the exact word order of `/oncall admin …` commands for the two most
+fiddly tasks:
+
+- **Set an override or add a holiday from a form.** The bot's *Home* tab now has
+  an **Admin** section with two buttons — *Set override* and *Add holiday* — that
+  open a small form with a date picker, an employee dropdown, and clearly
+  labelled fields (the holiday pay multiplier is its own box instead of a
+  squeezed-in `x2`). Pick the values, submit, and the change lands exactly as the
+  typed command would — same phone-routing update for same-day changes, same
+  schedule-post refresh — with mistakes flagged on the field instead of a wall of
+  usage text. The typed `/oncall admin …` commands still work as before.
+- **See what's coming up.** The Admin section also lists the upcoming overrides
+  and holidays so you can scan the next couple of months at a glance.
+
 ## v1.13.1 — June 29, 2026
 
 **Fixed: the weekly pay summary email to payroll is sending again.** A

docs/admin-ui-evaluation.md

@@ -0,0 +1,200 @@
+# Evaluation: admin web UI vs. clarifying/expanding in-Slack admin commands
+
+_Spike for issue #136 — decide how to make administration easier: a separate
+**admin web UI**, or **clarifying/expanding the in-Slack admin commands** (Block
+Kit modals + an App Home admin section). This document records the options, a
+recommendation, and the scope of the follow-up build. It is a "decide and
+recommend" spike — no admin-surface code ships in this PR. The route is left for
+sign-off (see "Decision needed" at the end)._
+
+## Current admin surface
+
+Every admin action is a positional-text subcommand of `/oncall admin …`,
+authorized by `is_admin = user_id in schedule.get_admin_users()`
+(`src/shared/shared/schedule.py`, `get_admin_users`) and handled in
+`_handle_admin()` / `_handle_admin_holiday()` (`src/slack-bot/app.py`):
+
+- `admin override <date> <ext> [day|night]` — assign a shift
+- `admin open <date> [day|night]` — mark a shift open
+- `admin clear <date> [day|night]` — remove an override (revert to weekly)
+- `admin roster add|remove|rename <ext> [name]`
+- `admin holiday add <date> <slots> [x<mult>] <label>` / `holiday remove <date>` /
+  `holiday list`
+
+A same-day `override` / `open` / `clear` also repoints 3CX (`_update_3cx_routing`),
+and `holiday add` provisions the 08:00/17:00 one-off schedules and may activate
+inline — so these commands have real side effects, which makes a confirmation
+preview valuable.
+
+### Pain points (from the issue, confirmed in code)
+
+- **Positional and error-prone.** Order-sensitive args — most acutely
+  `holiday add <date> <slots> [x<mult>] <label>`, which hand-parses an optional
+  `x<mult>` token out of the middle of the label (`_admin_holiday_add`). On any
+  mistake the only feedback is a usage string.
+- **Discoverability.** The single source of documentation is the static admin
+  block in `build_help_blocks(is_admin=True)` (`src/shared/shared/blocks.py`).
+  No pickers, no validation hints, no previews.
+- **No structured input.** No date picker, no roster dropdown, no
+  confirmation/preview before a change lands (and, same-day, repoints 3CX).
+- **No overview.** No calendar/grid of upcoming overrides + holidays to scan.
+
+### What already exists (lowers the cost of the Slack-native path)
+
+- **App Home tab is live.** `home_tab_enabled: true` in
+  `slack-app-manifest.yaml`; `build_home_view()` renders it and
+  `app_home_opened` re-publishes it (`src/slack-bot/app.py`). It currently shows
+  only the non-admin help — there is a natural place to add an admin section.
+- **Interactivity is wired.** `settings.interactivity.is_enabled: true`, and the
+  bot already registers `@app.action(...)` handlers (pickup/swap buttons). Adding
+  `@app.action(...)` for admin buttons and `@app.view(...)` for modal submits is
+  the same mechanism — **no new hosting, scope, or reinstall** is required for
+  modals (`views.open`/`view_submission` ride the existing interactivity URL).
+- **All mutations already have typed methods** on the `Schedule` class
+  (`set_override`, `mark_open`, `remove_override`, `add_roster_entry`,
+  `remove_roster_entry`, `rename_roster_entry`, `create_holiday`,
+  `remove_holiday`). Modals and a web API would both call the same methods, so
+  the authorization and side-effect logic does not get duplicated.
+
+## Options considered
+
+### (a) Expand/clarify inside Slack — **recommended (phase 1)**
+
+Add Block Kit **modals** (`views.open`) for the error-prone, high-value actions,
+an **admin section in App Home**, and keep the text subcommands as a fallback.
+
+- **Pros:** reuses existing interactivity + App Home; **no new infra, auth,
+  hosting, or OAuth scope**; native date pickers / dropdowns / numeric inputs
+  remove the positional-arg footguns; a confirmation preview before same-day
+  3CX repoints; one deploy target; the modal handlers call the same `Schedule`
+  methods the text commands do, so authorization stays in one place.
+- **Cons:** still lives in Slack; modal layout is constrained (no true
+  calendar/grid — an upcoming list is the practical "overview"); a small amount
+  of new view-state plumbing.
+
+### (b) Full admin web UI
+
+A separate hosted app (following the internal-portal pattern: Google OAuth,
+CDK-hosted, SHOC design system) talking to the schedule DynamoDB table through a
+new API.
+
+- **Pros:** full calendar/grid, bulk edits, the richest UX; not constrained by
+  Block Kit.
+- **Cons:** significant effort and ongoing cost — a new auth path (Google OAuth),
+  hosting (CDK), an API surface in front of DynamoDB, a **second deploy target**,
+  and a security / cross-family review. It also **forks the authorization model**:
+  `get_admin_users()` holds Slack user IDs, so a Google-OAuth UI needs an
+  identity mapping (Google account → Slack admin) to keep one source of truth.
+  Likely overkill unless admin volume is high.
+
+### (c) Status quo — keep text-only commands
+
+- **Pros:** zero work.
+- **Cons:** every pain point above persists; the `holiday add` arg order keeps
+  biting.
+
+## Recommendation: phased — (a) now, (b) only if admin volume grows
+
+Adopt **(a)** as phase 1 and treat **(b)** as a deferred phase 2 gated on real
+demand. Rationale:
+
+- **Admin actions are low-frequency and well-bounded.** Overrides, opens, clears,
+  roster edits, and a handful of holidays a year are individually quick. The cost
+  today is *correctness/discoverability per action* (getting the positional args
+  right), not throughput — which is exactly what modals fix, and which a web UI
+  fixes at far greater cost.
+- **(a) reuses everything; (b) builds a new stack.** The Slack-native path needs
+  no new hosting, scope, auth, or review and lands a large UX win for the effort
+  of a few modals plus an App Home section. (b) is a new auth + hosting + API +
+  review surface for a marginal gain at current volume, and it splits the
+  authorization model.
+- **(a) does not block (b).** If admin volume later justifies a calendar/grid or
+  bulk edits, the `Schedule` methods and `get_admin_users()` authorization are
+  already the clean seam a web API would sit on. Phase 1 is not throwaway.
+
+Either way, **`get_admin_users()` stays the single authorization source of
+truth**, and the **text commands stay as a fallback** so no current workflow
+breaks.
+
+## Scope of phase 1 (option a) — for the follow-up build
+
+The phase-1 build is intentionally *not* in this PR. Scoped here so the
+follow-up issue can be sized:
+
+### Modals to build (`views.open` + `view_submission`)
+
+Start with the two highest-pain actions, then optionally extend:
+
+1. **Override modal** — replaces/supplements `admin override`.
+   - `datepicker` for the date, a roster **dropdown** (`static_select` built from
+     `Schedule.get_roster()` so the extension/name can't be mistyped), and a
+     day/night `radio_buttons`/`static_select`.
+   - A confirmation line in the submit response when the date is today (it will
+     repoint 3CX).
+2. **Holiday-add modal** — replaces/supplements `admin holiday add` (the worst
+   positional offender).
+   - `datepicker` (date), `number_input`/plain-text **slots**, an explicit
+     **multiplier** input (its own field instead of a parsed `x<mult>` token),
+     and a **label** input.
+   - `view_submission` validates (date not in the past, slots ≥ 1) and surfaces
+     errors as Block Kit field `errors` instead of a usage string.
+
+Optional follow-ons once the pattern is proven: **open**, **clear**, and
+**roster add/remove/rename** modals. These are lower-pain (fewer args) so they
+can stay text-only initially.
+
+### Handlers / wiring
+
+- A new `@app.action(...)` per admin button to call `client.views_open(...)` with
+  the modal view (built by new `build_*_modal()` helpers in
+  `src/shared/shared/blocks.py`, mirroring the existing `build_*` block builders).
+- A new `@app.view(...)` per modal `callback_id` to read `view.state.values`,
+  **re-check `is_admin` against `get_admin_users()`** (modals can be opened from
+  Home — never trust the surface), call the same `Schedule` method the text
+  command uses, run the same 3CX/announce side effects, and `ack()` (with field
+  `errors` on validation failure).
+- Reuse `_refresh_schedule_post(...)` after a successful mutation, exactly as the
+  text handlers do.
+
+### App Home admin section
+
+- In `build_home_view()`, when the viewer is an admin (look them up via
+  `get_admin_users()` before publishing), append an **Admin** section:
+  buttons that open the modals above, plus a compact **upcoming
+  overrides + holidays** list (the practical substitute for a calendar/grid).
+- `publish_home(...)` already runs on `app_home_opened`; it needs the viewer's
+  user id (it has `event["user"]`) to decide whether to include the admin
+  section.
+
+### Help / validation
+
+- Keep `build_help_blocks(is_admin=True)` as the text fallback reference, and
+  point it at the new modals ("or open the Admin tab in Home").
+
+### Manifest / scope impact
+
+- **None.** Modals and App Home interactivity use the **already-enabled**
+  `interactivity` request URL and the existing `app_home` config. No new OAuth
+  scope and **no reinstall** are required (unlike the `pins:write` change in the
+  sibling #135 work).
+
+## Scope of phase 2 (option b) — only if later justified
+
+Recorded so the deferral is a decision, not an omission:
+
+- **Auth:** Google OAuth following the internal-portal pattern, plus a Google →
+  Slack-admin identity mapping so `get_admin_users()` remains the source of
+  truth (do **not** introduce a parallel admin list).
+- **Hosting:** CDK-hosted app on the SHOC design system, a second deploy target
+  alongside the SAM stack.
+- **Data path:** a thin API in front of the schedule DynamoDB table that calls
+  the same `Schedule` methods (no direct table writes from the browser).
+- **Reviews:** security / cross-family review for the new public surface and
+  auth path.
+
+## Decision needed
+
+Recommendation is **(a) now, (b) later if volume grows**. The build route — ship
+phase 1 (Slack-native modals + App Home admin), commit to the full phased path,
+or jump straight to a web UI — is left for sign-off on the issue/PR before any
+admin-surface code is written.

src/shared/shared/blocks.py

@@ -447,6 +447,165 @@ def build_pickup_resolved_blocks(text: str) -> list[dict]:
     return [{"type": "section", "text": {"type": "mrkdwn", "text": text}}]
 
 
+# ── Admin modals + App Home admin section ───────────────────────────────
+#
+# These ids are read back from ``view.state.values`` in the slack-bot's
+# ``@app.view`` handlers, so the builders here and the readers there must agree.
+
+OPEN_OVERRIDE_MODAL_ACTION = "admin_open_override_modal"
+OPEN_HOLIDAY_MODAL_ACTION = "admin_open_holiday_modal"
+OVERRIDE_MODAL_CALLBACK = "admin_override_submit"
+HOLIDAY_ADD_MODAL_CALLBACK = "admin_holiday_add_submit"
+
+
+def _shift_option(value: str) -> dict:
+    return {"text": {"type": "plain_text", "text": value.capitalize()}, "value": value}
+
+
+def build_override_modal(roster: list[dict]) -> dict:
+    """Block Kit modal for setting a date override (admin only).
+
+    The employee picker is a ``static_select`` built from the roster so the
+    extension can't be mistyped. Block/action ids ('date', 'extension',
+    'shift_type') are read back in the ``view_submission`` handler.
+    """
+    options = [
+        {
+            "text": {
+                "type": "plain_text",
+                "text": f"{e.get('name') or e['extension']} (Ext {e['extension']})",
+            },
+            "value": e["extension"],
+        }
+        for e in sorted(roster, key=lambda e: (e.get("name") or "").lower())
+    ]
+    extension_element = {
+        "type": "static_select",
+        "action_id": "extension",
+        "placeholder": {"type": "plain_text", "text": "Choose an employee"},
+    }
+    if options:
+        extension_element["options"] = options
+    return {
+        "type": "modal",
+        "callback_id": OVERRIDE_MODAL_CALLBACK,
+        "title": {"type": "plain_text", "text": "Set Override"},
+        "submit": {"type": "plain_text", "text": "Set override"},
+        "close": {"type": "plain_text", "text": "Cancel"},
+        "blocks": [
+            {
+                "type": "input",
+                "block_id": "date",
+                "label": {"type": "plain_text", "text": "Date"},
+                "element": {"type": "datepicker", "action_id": "date"},
+            },
+            {
+                "type": "input",
+                "block_id": "extension",
+                "label": {"type": "plain_text", "text": "Employee"},
+                "element": extension_element,
+            },
+            {
+                "type": "input",
+                "block_id": "shift_type",
+                "label": {"type": "plain_text", "text": "Shift"},
+                "element": {
+                    "type": "static_select",
+                    "action_id": "shift_type",
+                    "initial_option": _shift_option("night"),
+                    "options": [_shift_option("night"), _shift_option("day")],
+                },
+            },
+        ],
+    }
+
+
+def build_holiday_add_modal() -> dict:
+    """Block Kit modal for scheduling a holiday day shift (admin only).
+
+    The multiplier is its own optional field (not a parsed ``x<mult>`` token).
+    Block/action ids ('date', 'slots', 'multiplier', 'label') are read back in
+    the ``view_submission`` handler.
+    """
+    return {
+        "type": "modal",
+        "callback_id": HOLIDAY_ADD_MODAL_CALLBACK,
+        "title": {"type": "plain_text", "text": "Add Holiday"},
+        "submit": {"type": "plain_text", "text": "Add holiday"},
+        "close": {"type": "plain_text", "text": "Cancel"},
+        "blocks": [
+            {
+                "type": "input",
+                "block_id": "date",
+                "label": {"type": "plain_text", "text": "Date"},
+                "element": {"type": "datepicker", "action_id": "date"},
+            },
+            {
+                "type": "input",
+                "block_id": "slots",
+                "label": {"type": "plain_text", "text": "Slots"},
+                "element": {
+                    "type": "plain_text_input",
+                    "action_id": "slots",
+                    "placeholder": {"type": "plain_text", "text": "e.g. 2"},
+                },
+            },
+            {
+                "type": "input",
+                "block_id": "multiplier",
+                "optional": True,
+                "label": {"type": "plain_text", "text": "Pay multiplier"},
+                "element": {
+                    "type": "plain_text_input",
+                    "action_id": "multiplier",
+                    "placeholder": {"type": "plain_text", "text": "Defaults to 1.5"},
+                },
+            },
+            {
+                "type": "input",
+                "block_id": "label",
+                "label": {"type": "plain_text", "text": "Label"},
+                "element": {
+                    "type": "plain_text_input",
+                    "action_id": "label",
+                    "placeholder": {
+                        "type": "plain_text",
+                        "text": "e.g. Independence Day",
+                    },
+                },
+            },
+        ],
+    }
+
+
+def build_admin_overview(
+    upcoming_overrides: list[dict], upcoming_holidays: list[dict]
+) -> dict:
+    """A compact 'upcoming overrides + holidays' section for the App Home admin tab."""
+    lines = ["*Upcoming overrides & holidays*"]
+    if not upcoming_overrides and not upcoming_holidays:
+        lines.append("_Nothing scheduled in the next 60 days._")
+    for o in upcoming_overrides:
+        dt = datetime.strptime(o["date"], "%Y-%m-%d")
+        shift = "Day" if o["shift_type"] == "day" else "Night"
+        who = (
+            "Open"
+            if o.get("extension") == "OPEN"
+            else f"{o.get('name') or o['extension']} (Ext {o['extension']})"
+        )
+        lines.append(f"• {dt.strftime('%a %b %-d')} ({shift}) — {who}")
+    for h in upcoming_holidays:
+        dt = datetime.strptime(h["SK"], "%Y-%m-%d")
+        slots = int(h.get("slots", 0))
+        filled = len(h.get("assignees", {}) or {})
+        mult = f"{float(h.get('multiplier', 1.5)):g}x"
+        lines.append(
+            f"• {dt.strftime('%a %b %-d')} — _{h.get('label', 'Holiday')}_ "
+            f"({filled}/{slots} filled, {mult})"
+        )
+    return {"type": "section", "text": {"type": "mrkdwn", "text": "\n".join(lines)}}
+
+
 def build_help_blocks(is_admin: bool = False) -> list[dict]:
     """Build help message blocks."""
     text = (
@@ -477,19 +636,28 @@ def build_help_blocks(is_admin: bool = False) -> list[dict]:
             "`/oncall admin holiday add <date> <slots> <label>` — Schedule a holiday day shift (8am–5pm)\n"
             "`/oncall admin holiday add <date> <slots> x<mult> <label>` — …with a custom pay multiplier\n"
             "`/oncall admin holiday remove <date>` — Remove a scheduled holiday\n"
-            "`/oncall admin holiday list` — List upcoming holidays"
+            "`/oncall admin holiday list` — List upcoming holidays\n\n"
+            "_Tip: open the *Admin* section of the bot's Home tab to set overrides "
+            "and add holidays with pickers instead of positional arguments._"
         )
     return [{"type": "section", "text": {"type": "mrkdwn", "text": text}}]
 
 
 def build_home_view(
-    version: str | None = None, notes: str = "", date_label: str = ""
+    version: str | None = None,
+    notes: str = "",
+    date_label: str = "",
+    *,
+    is_admin: bool = False,
+    upcoming_overrides: list[dict] | None = None,
+    upcoming_holidays: list[dict] | None = None,
 ) -> dict:
     """Build the App Home tab: what the bot does, the commands, and what's new.
 
     ``version``/``notes``/``date_label`` come from the newest CHANGELOG entry; when
     absent (e.g. the changelog could not be read) the "What's New" section is
-    simply omitted.
+    simply omitted. When ``is_admin`` is set, an Admin section with the override /
+    holiday modal buttons and an upcoming overview is appended.
     """
     blocks: list[dict] = [
         {
@@ -508,9 +676,35 @@ def build_home_view(
                 ),
             },
         },
-        *build_help_blocks(is_admin=False),
+        *build_help_blocks(is_admin=is_admin),
     ]
 
+    if is_admin:
+        blocks.append({"type": "divider"})
+        blocks.append(
+            {"type": "header", "text": {"type": "plain_text", "text": "Admin"}}
+        )
+        blocks.append(
+            {
+                "type": "actions",
+                "elements": [
+                    {
+                        "type": "button",
+                        "text": {"type": "plain_text", "text": "Set override"},
+                        "action_id": OPEN_OVERRIDE_MODAL_ACTION,
+                    },
+                    {
+                        "type": "button",
+                        "text": {"type": "plain_text", "text": "Add holiday"},
+                        "action_id": OPEN_HOLIDAY_MODAL_ACTION,
+                    },
+                ],
+            }
+        )
+        blocks.append(
+            build_admin_overview(upcoming_overrides or [], upcoming_holidays or [])
+        )
+
     if version:
         blocks.append({"type": "divider"})
         blocks.append(

src/shared/shared/schedule.py

@@ -197,6 +197,35 @@ class ShiftSchedule:
         sk = f"{date_str}-DAY" if shift_type == "day" else date_str
         self.table.delete_item(Key={"PK": "OVERRIDE", "SK": sk})
 
+    def list_overrides(self, start_date_str: str, end_date_str: str) -> list[dict]:
+        """Return overrides in the inclusive date range, ordered by date/shift.
+
+        A bounded SK range query (not a full scan): night overrides key on
+        ``<date>`` and day overrides on ``<date>-DAY``, both of which sort within
+        ``[start, end-DAY]``. Each result carries ``date``, ``shift_type``
+        ('day'/'night'), ``extension`` ('OPEN' for an open shift), and ``name``.
+        """
+        resp = self.table.query(
+            KeyConditionExpression=Key("PK").eq("OVERRIDE")
+            & Key("SK").between(start_date_str, f"{end_date_str}-DAY")
+        )
+        results = []
+        for item in sorted(resp.get("Items", []), key=lambda x: x["SK"]):
+            sk = item["SK"]
+            if sk.endswith("-DAY"):
+                date_str, shift_type = sk[:-4], "day"
+            else:
+                date_str, shift_type = sk, "night"
+            results.append(
+                {
+                    "date": date_str,
+                    "shift_type": shift_type,
+                    "extension": item.get("extension", ""),
+                    "name": item.get("name", ""),
+                }
+            )
+        return results
+
     # ── Swap requests ───────────────────────────────────────────────────
 
     def create_pending_swap(
@@ -387,6 +416,14 @@ class ShiftSchedule:
     def remove_holiday(self, date_str: str) -> None:
         self.table.delete_item(Key={"PK": "HOLIDAY", "SK": date_str})
 
+    def list_holidays(self, start_date_str: str) -> list[dict]:
+        """Return holiday records on or after ``start_date_str``, ordered by date."""
+        resp = self.table.query(
+            KeyConditionExpression=Key("PK").eq("HOLIDAY")
+            & Key("SK").gte(start_date_str)
+        )
+        return sorted(resp.get("Items", []), key=lambda x: x["SK"])
+
     def claim_holiday_slot(self, date_str: str, extension: str, name: str) -> bool:
         """Atomically add an assignee to a holiday slot.
 

src/slack-bot/CHANGELOG.md

@@ -10,6 +10,23 @@ fine and still supported.
 
 ---
 
+## v1.14.0 — July 2, 2026
+
+**Point-and-click admin actions, right inside Slack.** Admins no longer have to
+remember the exact word order of `/oncall admin …` commands for the two most
+fiddly tasks:
+
+- **Set an override or add a holiday from a form.** The bot's *Home* tab now has
+  an **Admin** section with two buttons — *Set override* and *Add holiday* — that
+  open a small form with a date picker, an employee dropdown, and clearly
+  labelled fields (the holiday pay multiplier is its own box instead of a
+  squeezed-in `x2`). Pick the values, submit, and the change lands exactly as the
+  typed command would — same phone-routing update for same-day changes, same
+  schedule-post refresh — with mistakes flagged on the field instead of a wall of
+  usage text. The typed `/oncall admin …` commands still work as before.
+- **See what's coming up.** The Admin section also lists the upcoming overrides
+  and holidays so you can scan the next couple of months at a glance.
+
 ## v1.13.1 — June 29, 2026
 
 **Fixed: the weekly pay summary email to payroll is sending again.** A

src/slack-bot/app.py

@@ -16,13 +16,18 @@ from datetime import datetime, timedelta
 from zoneinfo import ZoneInfo
 
 import boto3
-from boto3.dynamodb.conditions import Key
 from slack_bolt import App
 
 from shared.blocks import (
+    HOLIDAY_ADD_MODAL_CALLBACK,
+    OPEN_HOLIDAY_MODAL_ACTION,
+    OPEN_OVERRIDE_MODAL_ACTION,
+    OVERRIDE_MODAL_CALLBACK,
     build_help_blocks,
+    build_holiday_add_modal,
     build_holiday_added_blocks,
     build_home_view,
+    build_override_modal,
     build_pay_summary_blocks,
     build_pickup_request_blocks,
     build_pickup_resolved_blocks,
@@ -1810,6 +1815,130 @@ def handle_pickup_deny(body, respond, client, schedule, schedule_channel):
             logger.exception("Failed to DM late-pickup requester on deny")
 
 
+# ── Shared admin validation + side-effect helpers ───────────────────────
+#
+# These are the single source of the admin mutation rules and side effects, so
+# the text subcommands and the Block Kit modal ``view_submission`` handlers can't
+# drift. Validators return an error string (or ``None``); apply helpers run the
+# ``Schedule`` mutation plus the same 3CX / schedule-post side effects.
+
+
+def _resolve_roster_employee(schedule, extension):
+    """Return (employee, error). ``error`` is set when the extension is unknown."""
+    employee = schedule.get_employee_by_extension(extension)
+    if not employee:
+        return None, f"Extension `{extension}` not found in the roster."
+    return employee, None
+
+
+def _validate_holiday_date(date_str: str) -> str | None:
+    """Error message if a holiday date is in the past, else None."""
+    if date_str < datetime.now(EASTERN).strftime("%Y-%m-%d"):
+        return "You can't schedule a holiday in the past."
+    return None
+
+
+def _parse_slots(raw):
+    """Parse a holiday slot count. Returns (slots, error)."""
+    try:
+        slots = int(raw)
+    except (ValueError, TypeError):
+        return None, f"Slots must be a whole number, got `{raw}`."
+    if slots < 1:
+        return None, "Slots must be at least 1."
+    return slots, None
+
+
+def _parse_multiplier(raw):
+    """Parse an optional pay multiplier (`2`, `2.0`, or `x2`). Returns (value, error)."""
+    if raw is None:
+        return None, None
+    token = raw.strip()
+    if not token:
+        return None, None
+    match = re.fullmatch(r"x?([0-9]+(?:\.[0-9]+)?)", token, re.IGNORECASE)
+    if not match:
+        return None, f"Multiplier must be a number like `2` or `x1.5`, got `{raw}`."
+    return match.group(1), None
+
+
+def _validate_label(label: str) -> str | None:
+    if not label.strip():
+        return "A holiday label is required."
+    return None
+
+
+def _apply_override(schedule, date_str, employee, shift_type, client, schedule_channel):
+    """Set the override + same-day 3CX repoint + post refresh.
+
+    Returns (message, repointed_3cx). Shared by the text command and the modal.
+    """
+    schedule.set_override(date_str, employee["extension"], employee["name"], shift_type)
+    repointed = False
+    if is_today(date_str) and _is_active_shift_type(shift_type):
+        _update_3cx_routing(employee["extension"])
+        repointed = True
+    _refresh_schedule_post(schedule, schedule_channel, client)
+    date = datetime.strptime(date_str, "%Y-%m-%d")
+    label = "Day" if shift_type == "day" else "Night"
+    message = (
+        f"Override set: *{date.strftime('%A, %b %-d')}* ({label}) → "
+        f"{employee['name']} (Ext {employee['extension']})"
+    )
+    return message, repointed
+
+
+def _apply_holiday_add(
+    schedule, date_str, slots, multiplier, label, client, schedule_channel
+):
+    """Create the holiday record + one-off schedules + side effects.
+
+    Returns (created, message). Shared by the text command and the modal.
+    """
+    schedule_names = _create_holiday_schedules(date_str)
+    created = schedule.create_holiday(
+        date_str,
+        slots=slots,
+        label=label,
+        created_by=schedule_channel or "",
+        multiplier=multiplier,
+        schedule_names=schedule_names,
+    )
+    date = datetime.strptime(date_str, "%Y-%m-%d")
+    if not created:
+        # Roll back the schedules we just made for a date that already has one.
+        _delete_holiday_schedules(schedule_names)
+        return False, (
+            f"A holiday already exists on *{date.strftime('%A, %b %-d')}*. "
+            "Remove it first to recreate."
+        )
+
+    # If the window is already open (admin added it mid-day), the 08:00 schedule
+    # has passed, so repoint the call flow now via the holiday router.
+    if _holiday_window_active(date_str):
+        _activate_holiday_inline(schedule, date_str)
+
+    holiday = schedule.get_holiday(date_str)
+    multiplier_value = holiday["multiplier"] if holiday else (multiplier or "1.5")
+
+    if schedule_channel:
+        try:
+            client.chat_postMessage(
+                channel=schedule_channel,
+                blocks=build_holiday_added_blocks(
+                    date_str, label, slots, multiplier_value
+                ),
+                text=f"Holiday added: {label} on {date_str}",
+            )
+        except Exception:
+            logger.exception("Failed to post holiday-added notification to channel")
+    _refresh_schedule_post(schedule, schedule_channel, client)
+    return True, (
+        f"Scheduled *{label}* holiday on *{date.strftime('%A, %b %-d')}* — "
+        f"{slots} slot{'s' if slots != 1 else ''} at {float(multiplier_value):g}x pay."
+    )
+
+
 def _handle_admin(respond, schedule, user_id, text, is_admin, client, schedule_channel):
     if not is_admin:
         respond(text="Admin commands are restricted. Contact an administrator.")
@@ -1849,21 +1978,15 @@ def _handle_admin(respond, schedule, user_id, text, is_admin, client, schedule_c
         shift_type = (
             parts[4] if len(parts) > 4 and parts[4] in ("day", "night") else "night"
         )
-        employee = schedule.get_employee_by_extension(ext)
-        if not employee:
-            respond(text=f"Extension `{ext}` not found in the roster.")
+        employee, error = _resolve_roster_employee(schedule, ext)
+        if error:
+            respond(text=error)
             return
         date_str = date.strftime("%Y-%m-%d")
-        schedule.set_override(
-            date_str, employee["extension"], employee["name"], shift_type
+        message, _repointed = _apply_override(
+            schedule, date_str, employee, shift_type, client, schedule_channel
         )
-        if is_today(date_str) and _is_active_shift_type(shift_type):
-            _update_3cx_routing(employee["extension"])
-        label = "Day" if shift_type == "day" else "Night"
-        respond(
-            text=f"Override set: *{date.strftime('%A, %b %-d')}* ({label}) → {employee['name']} (Ext {ext})"
-        )
-        _refresh_schedule_post(schedule, schedule_channel, client)
+        respond(text=message)
 
     elif subcmd == "open":
         if len(parts) < 3:
@@ -2010,17 +2133,14 @@ def _admin_holiday_add(respond, schedule, parts, client, schedule_channel):
         respond(text=f"Couldn't parse date: `{parts[3]}`")
         return
     date_str = date.strftime("%Y-%m-%d")
-    if date_str < datetime.now(EASTERN).strftime("%Y-%m-%d"):
-        respond(text="You can't schedule a holiday in the past.")
+    date_error = _validate_holiday_date(date_str)
+    if date_error:
+        respond(text=date_error)
         return
 
-    try:
-        slots = int(parts[4])
-    except ValueError:
-        respond(text=f"Slots must be a whole number, got `{parts[4]}`.")
-        return
-    if slots < 1:
-        respond(text="Slots must be at least 1.")
+    slots, slots_error = _parse_slots(parts[4])
+    if slots_error:
+        respond(text=slots_error)
         return
 
     # Optional ``x<mult>`` token before the label.
@@ -2030,54 +2150,15 @@ def _admin_holiday_add(respond, schedule, parts, client, schedule_channel):
         multiplier = rest[0][1:]
         rest = rest[1:]
     label = " ".join(rest).strip()
-    if not label:
-        respond(text="A holiday label is required.")
+    label_error = _validate_label(label)
+    if label_error:
+        respond(text=label_error)
         return
 
-    schedule_names = _create_holiday_schedules(date_str)
-    created = schedule.create_holiday(
-        date_str,
-        slots=slots,
-        label=label,
-        created_by=schedule_channel or "",
-        multiplier=multiplier,
-        schedule_names=schedule_names,
+    _created, message = _apply_holiday_add(
+        schedule, date_str, slots, multiplier, label, client, schedule_channel
     )
-    if not created:
-        # Roll back the schedules we just made for a date that already has one.
-        _delete_holiday_schedules(schedule_names)
-        respond(
-            text=f"A holiday already exists on *{date.strftime('%A, %b %-d')}*. "
-            "Remove it first to recreate."
-        )
-        return
-
-    # If the window is already open (admin added it mid-day), the 08:00 schedule
-    # has passed, so repoint the call flow now via the holiday router.
-    if _holiday_window_active(date_str):
-        _activate_holiday_inline(schedule, date_str)
-
-    holiday = schedule.get_holiday(date_str)
-    multiplier_value = holiday["multiplier"] if holiday else (multiplier or "1.5")
-    respond(
-        text=(
-            f"Scheduled *{label}* holiday on *{date.strftime('%A, %b %-d')}* — "
-            f"{slots} slot{'s' if slots != 1 else ''} at {float(multiplier_value):g}x pay."
-        )
-    )
-
-    if schedule_channel:
-        try:
-            client.chat_postMessage(
-                channel=schedule_channel,
-                blocks=build_holiday_added_blocks(
-                    date_str, label, slots, multiplier_value
-                ),
-                text=f"Holiday added: {label} on {date_str}",
-            )
-        except Exception:
-            logger.exception("Failed to post holiday-added notification to channel")
-    _refresh_schedule_post(schedule, schedule_channel, client)
+    respond(text=message)
 
 
 def _admin_holiday_remove(respond, schedule, parts, client, schedule_channel):
@@ -2110,16 +2191,13 @@ def _admin_holiday_remove(respond, schedule, parts, client, schedule_channel):
 def _admin_holiday_list(respond, schedule):
     """`admin holiday list` — show today-and-future scheduled holidays."""
     today_str = datetime.now(EASTERN).strftime("%Y-%m-%d")
-    resp = schedule.table.query(
-        KeyConditionExpression=Key("PK").eq("HOLIDAY") & Key("SK").gte(today_str)
-    )
-    items = resp.get("Items", [])
+    items = schedule.list_holidays(today_str)
     if not items:
         respond(text="No upcoming holidays scheduled.")
         return
 
     lines = ["*Upcoming Holidays*\n"]
-    for item in sorted(items, key=lambda x: x["SK"]):
+    for item in items:
         date_str = item["SK"]
         dt = datetime.strptime(date_str, "%Y-%m-%d")
         slots = int(item.get("slots", 0))
@@ -2152,17 +2230,132 @@ def _changelog_text() -> str:
         return ""
 
 
-def publish_home(client, user_id: str, changelog_text: str) -> None:
-    """Render and publish the App Home view for ``user_id``."""
+_HOME_OVERVIEW_DAYS = 60
+
+
+def publish_home(client, user_id: str, changelog_text: str, schedule=None) -> None:
+    """Render and publish the App Home view for ``user_id``.
+
+    When ``schedule`` is provided and the viewer is an admin (looked up via
+    ``get_admin_users()`` — never trust the surface), the admin section with the
+    override/holiday modal buttons and an upcoming overview is included.
+    """
     entry = latest_entry(changelog_text)
+    is_admin = False
+    upcoming_overrides = None
+    upcoming_holidays = None
+    if schedule is not None and user_id in schedule.get_admin_users():
+        is_admin = True
+        today = datetime.now(EASTERN)
+        start = today.strftime("%Y-%m-%d")
+        end = (today + timedelta(days=_HOME_OVERVIEW_DAYS)).strftime("%Y-%m-%d")
+        upcoming_overrides = schedule.list_overrides(start, end)
+        upcoming_holidays = schedule.list_holidays(start)
     view = build_home_view(
         version=entry.version if entry else None,
         notes=entry.body if entry else "",
         date_label=entry.date_label if entry else "",
+        is_admin=is_admin,
+        upcoming_overrides=upcoming_overrides,
+        upcoming_holidays=upcoming_holidays,
     )
     client.views_publish(user_id=user_id, view=view)
 
 
+# ── Admin modals (views.open + view_submission) ─────────────────────────
+
+
+def _notify_admin(client, user_id: str, text: str) -> None:
+    """DM the admin a confirmation of a modal-driven change (best-effort)."""
+    try:
+        client.chat_postMessage(channel=user_id, text=text)
+    except Exception:
+        logger.exception("Failed to send admin modal confirmation DM")
+
+
+def open_override_modal(body, client, schedule) -> None:
+    """Open the override modal — admins only (re-check, never trust the surface)."""
+    user_id = body["user"]["id"]
+    if user_id not in schedule.get_admin_users():
+        return
+    client.views_open(
+        trigger_id=body["trigger_id"],
+        view=build_override_modal(schedule.get_roster()),
+    )
+
+
+def open_holiday_add_modal(body, client, schedule) -> None:
+    """Open the holiday-add modal — admins only (re-check, never trust surface)."""
+    user_id = body["user"]["id"]
+    if user_id not in schedule.get_admin_users():
+        return
+    client.views_open(trigger_id=body["trigger_id"], view=build_holiday_add_modal())
+
+
+def handle_override_submission(ack, body, view, client, schedule, schedule_channel):
+    """``view_submission`` for the override modal."""
+    user_id = body["user"]["id"]
+    if user_id not in schedule.get_admin_users():
+        ack(response_action="errors", errors={"date": "Admin access required."})
+        return
+
+    values = view["state"]["values"]
+    date_str = values["date"]["date"]["selected_date"]
+    ext = values["extension"]["extension"]["selected_option"]["value"]
+    shift_type = values["shift_type"]["shift_type"]["selected_option"]["value"]
+
+    employee, error = _resolve_roster_employee(schedule, ext)
+    if error:
+        ack(response_action="errors", errors={"extension": error})
+        return
+
+    ack()
+    message, repointed = _apply_override(
+        schedule, date_str, employee, shift_type, client, schedule_channel
+    )
+    if repointed:
+        message += (
+            "\n:telephone_receiver: This is today — the phone routing has been "
+            "repointed now."
+        )
+    _notify_admin(client, user_id, message)
+
+
+def handle_holiday_add_submission(ack, body, view, client, schedule, schedule_channel):
+    """``view_submission`` for the holiday-add modal."""
+    user_id = body["user"]["id"]
+    if user_id not in schedule.get_admin_users():
+        ack(response_action="errors", errors={"date": "Admin access required."})
+        return
+
+    values = view["state"]["values"]
+    date_str = values["date"]["date"]["selected_date"]
+    slots_raw = values["slots"]["slots"].get("value")
+    mult_raw = values["multiplier"]["multiplier"].get("value")
+    label = values["label"]["label"].get("value") or ""
+
+    errors = {}
+    if date_error := _validate_holiday_date(date_str):
+        errors["date"] = date_error
+    slots, slots_error = _parse_slots(slots_raw)
+    if slots_error:
+        errors["slots"] = slots_error
+    multiplier, mult_error = _parse_multiplier(mult_raw)
+    if mult_error:
+        errors["multiplier"] = mult_error
+    if label_error := _validate_label(label):
+        errors["label"] = label_error
+    if errors:
+        ack(response_action="errors", errors=errors)
+        return
+
+    ack()
+    _created, message = _apply_holiday_add(
+        schedule, date_str, slots, multiplier, label.strip(), client, schedule_channel
+    )
+    _notify_admin(client, user_id, message)
+
+
 # ── App factory ─────────────────────────────────────────────────────────
 
 
@@ -2209,12 +2402,34 @@ def create_app(
         ack()
         handle_swap_decline(body, respond, client, schedule, schedule_channel)
 
+    # Admin App Home buttons → open the corresponding Block Kit modal.
+    @app.action(OPEN_OVERRIDE_MODAL_ACTION)
+    def handle_open_override_modal(ack, body, client):
+        ack()
+        open_override_modal(body, client, schedule)
+
+    @app.action(OPEN_HOLIDAY_MODAL_ACTION)
+    def handle_open_holiday_modal(ack, body, client):
+        ack()
+        open_holiday_add_modal(body, client, schedule)
+
+    # Admin modal submissions (ack is handled inside, with field errors).
+    @app.view(OVERRIDE_MODAL_CALLBACK)
+    def handle_override_view(ack, body, view, client):
+        handle_override_submission(ack, body, view, client, schedule, schedule_channel)
+
+    @app.view(HOLIDAY_ADD_MODAL_CALLBACK)
+    def handle_holiday_add_view(ack, body, view, client):
+        handle_holiday_add_submission(
+            ack, body, view, client, schedule, schedule_channel
+        )
+
     @app.event("app_home_opened")
     def handle_app_home_opened(event, client):
         # Fires for the Messages tab too; only (re)publish the Home tab.
         if event.get("tab") != "home":
             return
-        publish_home(client, event["user"], _changelog_text())
+        publish_home(client, event["user"], _changelog_text(), schedule)
 
     @app.event("message")
     def handle_message_event(event, client, request):

tests/shared/test_blocks.py

@@ -3,8 +3,11 @@
 from freezegun import freeze_time
 
 from shared.blocks import (
+    build_admin_overview,
     build_help_blocks,
+    build_holiday_add_modal,
     build_holiday_added_blocks,
+    build_override_modal,
     build_pay_summary_blocks,
     build_pickup_request_blocks,
     build_pickup_resolved_blocks,
@@ -383,6 +386,79 @@ class TestBuildRosterBlocks:
         assert "_not linked_" in text
 
 
+def _block_ids(view):
+    return {b["block_id"] for b in view["blocks"] if b.get("block_id")}
+
+
+class TestBuildOverrideModal:
+    def test_callback_and_input_blocks(self):
+        view = build_override_modal([{"extension": "114", "name": "Alice"}])
+        assert view["type"] == "modal"
+        assert view["callback_id"] == "admin_override_submit"
+        assert _block_ids(view) == {"date", "extension", "shift_type"}
+
+    def test_extension_dropdown_built_from_roster(self):
+        view = build_override_modal(
+            [{"extension": "114", "name": "Alice"}, {"extension": "115", "name": "Bob"}]
+        )
+        ext_block = next(b for b in view["blocks"] if b["block_id"] == "extension")
+        values = [o["value"] for o in ext_block["element"]["options"]]
+        assert values == ["114", "115"]
+
+    def test_empty_roster_omits_options(self):
+        view = build_override_modal([])
+        ext_block = next(b for b in view["blocks"] if b["block_id"] == "extension")
+        assert "options" not in ext_block["element"]
+
+
+class TestBuildHolidayAddModal:
+    def test_callback_and_input_blocks(self):
+        view = build_holiday_add_modal()
+        assert view["callback_id"] == "admin_holiday_add_submit"
+        assert _block_ids(view) == {"date", "slots", "multiplier", "label"}
+
+    def test_multiplier_is_optional(self):
+        view = build_holiday_add_modal()
+        mult = next(b for b in view["blocks"] if b["block_id"] == "multiplier")
+        assert mult["optional"] is True
+
+
+class TestBuildAdminOverview:
+    def test_empty_overview(self):
+        text = build_admin_overview([], [])["text"]["text"]
+        assert "Nothing scheduled" in text
+
+    def test_lists_overrides_and_holidays(self):
+        overrides = [
+            {
+                "date": "2026-12-25",
+                "shift_type": "night",
+                "extension": "114",
+                "name": "Alice",
+            },
+            {
+                "date": "2026-12-26",
+                "shift_type": "day",
+                "extension": "OPEN",
+                "name": "Open",
+            },
+        ]
+        holidays = [
+            {
+                "SK": "2026-12-25",
+                "slots": 2,
+                "assignees": {},
+                "multiplier": 1.5,
+                "label": "Christmas",
+            }
+        ]
+        text = build_admin_overview(overrides, holidays)["text"]["text"]
+        assert "Alice (Ext 114)" in text
+        assert "(Day) — Open" in text
+        assert "Christmas" in text
+        assert "0/2 filled" in text
+
+
 class TestReleaseAnnouncement:
     def test_markdown_bold_becomes_slack_bold(self):
         assert markdown_to_mrkdwn("**Big news.** text") == "*Big news.* text"

tests/shared/test_schedule.py

@@ -117,6 +117,41 @@ class TestOverrides:
         assert schedule.resolve_shift(WED, "Wednesday") == ("114", "Alice", "weekly")
 
 
+class TestListOverrides:
+    def test_returns_night_and_day_in_range(self, schedule, seed):
+        seed.override(WED, "115", "Bob")
+        seed.override(SAT, "200", "DayPerson", shift_type="day")
+        seed.open_shift(SUN)
+        result = schedule.list_overrides(WED, SUN)
+        assert result == [
+            {"date": WED, "shift_type": "night", "extension": "115", "name": "Bob"},
+            {
+                "date": SAT,
+                "shift_type": "day",
+                "extension": "200",
+                "name": "DayPerson",
+            },
+            {"date": SUN, "shift_type": "night", "extension": "OPEN", "name": "Open"},
+        ]
+
+    def test_excludes_dates_outside_range(self, schedule, seed):
+        seed.override("2026-05-31", "100", "Before")
+        seed.override(WED, "115", "Bob")
+        seed.override("2026-06-30", "300", "After")
+        result = schedule.list_overrides(WED, SUN)
+        assert [r["extension"] for r in result] == ["115"]
+
+    def test_includes_day_override_on_end_date(self, schedule, seed):
+        seed.override(SUN, "201", "EndDay", shift_type="day")
+        result = schedule.list_overrides(WED, SUN)
+        assert result == [
+            {"date": SUN, "shift_type": "day", "extension": "201", "name": "EndDay"}
+        ]
+
+    def test_empty_when_no_overrides(self, schedule):
+        assert schedule.list_overrides(WED, SUN) == []
+
+
 class TestClaimOpenShift:
     def test_claim_when_no_override_succeeds(self, schedule):
         assert schedule.claim_open_shift(WED, "114", "Alice") is True

tests/slack_bot/test_admin_modals.py

@@ -0,0 +1,189 @@
+"""Tests for the admin Block Kit modals — opening (views.open), submitting
+(view_submission), shared validation, and non-admin rejection (the IDOR case:
+a modal can be opened from Home, so the surface is never trusted)."""
+
+from unittest.mock import MagicMock
+
+import pytest
+from freezegun import freeze_time
+
+ADMIN = "U_ADMIN"
+INTRUDER = "U_INTRUDER"
+
+# 2026-06-01 is a Monday → night shift; 18:00 ET is inside the night window.
+MON_NIGHT = "2026-06-01 18:00:00"
+
+
+@pytest.fixture
+def admin_schedule(schedule, seed):
+    seed.config(admin_users=[ADMIN])
+    return schedule
+
+
+@pytest.fixture
+def ack():
+    return MagicMock(name="ack")
+
+
+def _override_view(date="2026-12-25", ext="114", shift="night"):
+    return {
+        "state": {
+            "values": {
+                "date": {"date": {"selected_date": date}},
+                "extension": {"extension": {"selected_option": {"value": ext}}},
+                "shift_type": {"shift_type": {"selected_option": {"value": shift}}},
+            }
+        }
+    }
+
+
+def _holiday_view(date="2026-12-25", slots="2", multiplier="", label="Christmas"):
+    return {
+        "state": {
+            "values": {
+                "date": {"date": {"selected_date": date}},
+                "slots": {"slots": {"value": slots}},
+                "multiplier": {"multiplier": {"value": multiplier or None}},
+                "label": {"label": {"value": label}},
+            }
+        }
+    }
+
+
+def _body(user_id=ADMIN, trigger_id="T123"):
+    return {"user": {"id": user_id}, "trigger_id": trigger_id}
+
+
+class TestOpenModals:
+    def test_admin_opens_override_modal(
+        self, slackbot_app, admin_schedule, seed, client
+    ):
+        seed.roster("114", "Alice")
+        slackbot_app.open_override_modal(_body(), client, admin_schedule)
+        view = client.views_open.call_args.kwargs["view"]
+        assert view["callback_id"] == "admin_override_submit"
+
+    def test_admin_opens_holiday_modal(self, slackbot_app, admin_schedule, client):
+        slackbot_app.open_holiday_add_modal(_body(), client, admin_schedule)
+        view = client.views_open.call_args.kwargs["view"]
+        assert view["callback_id"] == "admin_holiday_add_submit"
+
+    def test_non_admin_cannot_open_override(self, slackbot_app, admin_schedule, client):
+        slackbot_app.open_override_modal(_body(INTRUDER), client, admin_schedule)
+        client.views_open.assert_not_called()
+
+    def test_non_admin_cannot_open_holiday(self, slackbot_app, admin_schedule, client):
+        slackbot_app.open_holiday_add_modal(_body(INTRUDER), client, admin_schedule)
+        client.views_open.assert_not_called()
+
+
+class TestOverrideSubmission:
+    def test_happy_path(self, slackbot_app, admin_schedule, seed, ack, client):
+        seed.roster("114", "Alice")
+        slackbot_app.handle_override_submission(
+            ack, _body(), _override_view(), client, admin_schedule, None
+        )
+        assert admin_schedule.get_override("2026-12-25")["extension"] == "114"
+        ack.assert_called_once_with()
+        assert client.chat_postMessage.call_args.kwargs["channel"] == ADMIN
+
+    @freeze_time(MON_NIGHT)
+    def test_same_day_repoints_and_confirms(
+        self, slackbot_app, admin_schedule, seed, ack, client, routing_spy
+    ):
+        seed.roster("114", "Alice")
+        slackbot_app.handle_override_submission(
+            ack,
+            _body(),
+            _override_view(date="2026-06-01"),
+            client,
+            admin_schedule,
+            None,
+        )
+        routing_spy.assert_called_once_with("114")
+        assert "repointed" in client.chat_postMessage.call_args.kwargs["text"].lower()
+
+    def test_unknown_extension_surfaces_field_error(
+        self, slackbot_app, admin_schedule, ack, client
+    ):
+        slackbot_app.handle_override_submission(
+            ack, _body(), _override_view(ext="999"), client, admin_schedule, None
+        )
+        kwargs = ack.call_args.kwargs
+        assert kwargs["response_action"] == "errors"
+        assert "extension" in kwargs["errors"]
+        assert admin_schedule.get_override("2026-12-25") is None
+
+    def test_non_admin_rejected(self, slackbot_app, admin_schedule, seed, ack, client):
+        seed.roster("114", "Alice")
+        slackbot_app.handle_override_submission(
+            ack, _body(INTRUDER), _override_view(), client, admin_schedule, None
+        )
+        assert ack.call_args.kwargs["response_action"] == "errors"
+        assert admin_schedule.get_override("2026-12-25") is None
+
+
+@freeze_time("2026-06-01 12:00:00")
+class TestHolidaySubmission:
+    def test_happy_path(self, slackbot_app, admin_schedule, ack, client, monkeypatch):
+        monkeypatch.setattr(slackbot_app, "_activate_holiday_inline", MagicMock())
+        slackbot_app.handle_holiday_add_submission(
+            ack, _body(), _holiday_view(multiplier="2"), client, admin_schedule, "C_T"
+        )
+        holiday = admin_schedule.get_holiday("2026-12-25")
+        assert holiday["slots"] == 2
+        assert holiday["label"] == "Christmas"
+        assert float(holiday["multiplier"]) == 2.0
+        ack.assert_called_once_with()
+        assert client.chat_postMessage.call_args.kwargs["channel"] == ADMIN
+
+    def test_default_multiplier_when_blank(
+        self, slackbot_app, admin_schedule, ack, client, monkeypatch
+    ):
+        monkeypatch.setattr(slackbot_app, "_activate_holiday_inline", MagicMock())
+        slackbot_app.handle_holiday_add_submission(
+            ack, _body(), _holiday_view(), client, admin_schedule, None
+        )
+        assert float(admin_schedule.get_holiday("2026-12-25")["multiplier"]) == 1.5
+
+    def test_past_date_surfaces_field_error(
+        self, slackbot_app, admin_schedule, ack, client
+    ):
+        slackbot_app.handle_holiday_add_submission(
+            ack, _body(), _holiday_view(date="2026-01-01"), client, admin_schedule, None
+        )
+        errors = ack.call_args.kwargs["errors"]
+        assert "date" in errors and "past" in errors["date"].lower()
+        assert admin_schedule.get_holiday("2026-01-01") is None
+
+    def test_bad_slots_surfaces_field_error(
+        self, slackbot_app, admin_schedule, ack, client
+    ):
+        slackbot_app.handle_holiday_add_submission(
+            ack, _body(), _holiday_view(slots="lots"), client, admin_schedule, None
+        )
+        assert "slots" in ack.call_args.kwargs["errors"]
+        assert admin_schedule.get_holiday("2026-12-25") is None
+
+    def test_missing_label_surfaces_field_error(
+        self, slackbot_app, admin_schedule, ack, client
+    ):
+        slackbot_app.handle_holiday_add_submission(
+            ack, _body(), _holiday_view(label=""), client, admin_schedule, None
+        )
+        assert "label" in ack.call_args.kwargs["errors"]
+
+    def test_bad_multiplier_surfaces_field_error(
+        self, slackbot_app, admin_schedule, ack, client
+    ):
+        slackbot_app.handle_holiday_add_submission(
+            ack, _body(), _holiday_view(multiplier="huge"), client, admin_schedule, None
+        )
+        assert "multiplier" in ack.call_args.kwargs["errors"]
+
+    def test_non_admin_rejected(self, slackbot_app, admin_schedule, ack, client):
+        slackbot_app.handle_holiday_add_submission(
+            ack, _body(INTRUDER), _holiday_view(), client, admin_schedule, None
+        )
+        assert ack.call_args.kwargs["response_action"] == "errors"
+        assert admin_schedule.get_holiday("2026-12-25") is None

tests/slack_bot/test_app_home.py

@@ -1,5 +1,7 @@
 """Tests for the App Home tab (about page + What's New)."""
 
+from freezegun import freeze_time
+
 from shared.blocks import build_home_view
 
 
@@ -44,3 +46,33 @@ def test_publish_home_degrades_without_changelog(slackbot_app, client):
     slackbot_app.publish_home(client, "U_BOB", "")
     view = client.views_publish.call_args.kwargs["view"]
     assert all("What's New" not in str(b) for b in view["blocks"])
+
+
+def test_publish_home_includes_admin_section_for_admin(
+    slackbot_app, schedule, seed, client
+):
+    seed.config(admin_users=["U_ADMIN"])
+    seed.override("2026-12-25", "114", "Alice")
+    seed.holiday("2026-12-25", slots=2, label="Christmas")
+    with freeze_time("2026-06-01"):
+        slackbot_app.publish_home(client, "U_ADMIN", "", schedule)
+    view = client.views_publish.call_args.kwargs["view"]
+    assert "Admin" in _headers(view)
+    assert "admin_open_override_modal" in str(view["blocks"])
+    assert "Christmas" in str(view["blocks"])
+
+
+def test_publish_home_omits_admin_section_for_non_admin(
+    slackbot_app, schedule, seed, client
+):
+    seed.config(admin_users=["U_ADMIN"])
+    slackbot_app.publish_home(client, "U_BOB", "", schedule)
+    view = client.views_publish.call_args.kwargs["view"]
+    assert "Admin" not in _headers(view)
+    assert "admin_open_override_modal" not in str(view["blocks"])
+
+
+def test_publish_home_without_schedule_has_no_admin_section(slackbot_app, client):
+    slackbot_app.publish_home(client, "U_ADMIN", "")
+    view = client.views_publish.call_args.kwargs["view"]
+    assert "Admin" not in _headers(view)