### T-19 · Move `DashboardFilterProvider` — page-scoped provider in wrong directory

**Where found:** `frontend/src/providers/DashboardFilterProvider.tsx` — instantiated only inside `DashboardPage.tsx`

**Why this is needed:** The `providers/` directory implies app-wide providers (alongside `AuthProvider`, `ThemeProvider`, `TimezoneProvider`). `DashboardFilterProvider` wraps only `DashboardPageContent` and is not used anywhere else. Its placement implies reuse that doesn't exist, misleading future contributors about its scope.

**Goal:** Co-located with its only consumer.

**What to do:**
1. Move `DashboardFilterProvider.tsx` to `frontend/src/pages/` (alongside `DashboardPage.tsx`) or to `frontend/src/pages/dashboard/` if the page is split into a subdirectory.
2. Update imports in `DashboardPage.tsx` and any tests.

**Possible traps and issues:** Only `DashboardPage.tsx` imports it — confirm with grep before moving.

**Docs changes needed:** `Docs/Web-Development.md` — document what belongs in `providers/` (app-wide) vs co-located.

**Doc references:** `Docs/Web-Development.md`

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### T-20 · Replace inline `style={{}}` objects with `makeStyles` classes

**Where found:** `frontend/src/pages/map/MapBansTable.tsx` (multiple), `pages/JailDetailPage.tsx`, `pages/HistoryPage.tsx`, `pages/history/IpDetailView.tsx`, `components/WorldMap.tsx`, `components/TopCountriesPieChart.tsx`, `components/TopCountriesBarChart.tsx`

**Why this is needed:** The project uses Fluent UI's `makeStyles` with atomic CSS caching. Inline `style={{}}` objects are allocated on every render, bypass the atomic CSS cache, and are inconsistent with the established pattern. Exceptions are acceptable only for truly dynamic values (e.g. tooltip `left`/`top` that change on mouse move) — static layout values must use `makeStyles`.

**Goal:** All static layout properties moved to `makeStyles`. Inline styles only for genuinely dynamic values.

**What to do:**
1. Audit each file listed above.
2. For static `display: flex`, `gap`, `margin`, `padding` — move to `makeStyles` in that component's style block.
3. Keep inline `style` only where the value is truly dynamic at runtime (e.g. `WorldMap` tooltip position, `TopCountriesBarChart` chart height).

**Possible traps and issues:**
- `MapBansTable.tsx` has several consecutive inline `style` objects for its pagination row — these can be collapsed into one named class.
- Some components use both `tokens.*` values and inline styles — ensure `makeStyles` is imported where it isn't already.

**Docs changes needed:** `Docs/Web-Development.md` — add styling rule: use `makeStyles` for all static styles; inline `style` only for runtime-dynamic values.

**Doc references:** `Docs/Web-Development.md`, Fluent UI v9 docs on `makeStyles`

---

### T-21 · `Fail2BanMetadataService` has inline socket timeout hardcoded

**Where found:** `backend/app/services/fail2ban_metadata_service.py:64` — `socket_timeout: float = 5.0`

**Why this is needed:** Part of the same constant duplication as T-08. This file doesn't use `_SOCKET_TIMEOUT` as a module constant — it hardcodes `5.0` inline as a local variable. Should use the constant from `constants.py` once T-08 is done.

**Goal:** After T-08, replace with `FAIL2BAN_SOCKET_TIMEOUT_FAST` import.

**What to do:** Covered by T-08 sweep.

**Possible traps and issues:** None — dependent on T-08.

**Docs changes needed:** None.

**Doc references:** `backend/app/services/fail2ban_metadata_service.py`