Rewrite store JSDoc, split quote/order into modules, and generate typed API docs

- Rewrite JSDoc across all store methods to document the actual async
  methods (real params, returns, throws) instead of the internal wrappers
- Split quote/order into individual module files backed by shared
  manifestDoc helpers; remove the createStore factory and thin wrappers
- Deduplicate manifest line helpers into src/store/manifestLines.js
- Extend generate-api-doc.js to render parameter/return/throws types and
  emit per-namespace API.<module>.md files with an API.md index
- Regenerate all API docs

API.unit.md

@@ -6,22 +6,49 @@ This document is auto-generated from the JSDoc comments in `src/store` by runnin
 
 *Source: `src/store/unit/delete.js`*
 
-Deletes a unit for a company by its SI code.
+Deletes a unit for the user's selected company by its SI code.
+
+**Parameters**
+
+| Name | Type | Description |
+| --- | --- | --- |
+| `googleAuthId` | `number` | The id of the Google auth user. |
+| `si` | `string` | The SI code of the unit to delete. |
+
+**Returns**
+
+`Promise<void>`
+
+**Throws**
+
+`Error` — If the unit is not found.
+
+**Example**
 
 ```js
-const fn = del(pool);
-await fn(42, 'l');
+await store.unit.delete(42, 'l');
 ```
 
 ## `unit.list`
 
 *Source: `src/store/unit/list.js`*
 
-Lists the units available for a company.
+Lists the units available for the user's selected company.
+
+**Parameters**
+
+| Name | Type | Description |
+| --- | --- | --- |
+| `googleAuthId` | `number` | The id of the Google auth user. |
+
+**Returns**
+
+`Promise<Array<{id: number, si: string, basesi: string, basesifactor: number, symbol: string, name: string}>>` — The units.
+
+**Example**
 
 ```js
-const fn = list(pool);
-const units = await fn(42);
+const units = await store.unit.list(42);
 // => [{ id, si, basesi, basesifactor, symbol, name }]
 ```
 
@@ -29,10 +56,31 @@ const units = await fn(42);
 
 *Source: `src/store/unit/upsert.js`*
 
-Creates or updates a unit for a company, keyed by its SI code.
+Creates or updates a unit for the user's selected company, keyed by its SI code.
+
+**Parameters**
+
+| Name | Type | Description |
+| --- | --- | --- |
+| `googleAuthId` | `number` | The id of the Google auth user. |
+| `input` | `object` | The unit input. |
+| `input.si` | `string` | The SI code. |
+| `input.basesi` | `string` | The base SI code. |
+| `input.basesifactor` | `number` | The base SI factor (must be > 0). |
+| `input.symbol` | `string` | The unit symbol. |
+| `input.name` | `string` | The unit name. |
+
+**Returns**
+
+`Promise<{id: number, si: string, basesi: string, basesifactor: number, symbol: string, name: string}>` — The upserted unit.
+
+**Throws**
+
+`Error` — If the unit is invalid.
+
+**Example**
 
 ```js
-const fn = upsert(pool);
-const unit = await fn(42, { si: 'l', basesi: 'm3', basesifactor: 0.001, symbol: 'L', name: 'Liter' });
+const unit = await store.unit.upsert(42, { si: 'l', basesi: 'm3', basesifactor: 0.001, symbol: 'L', name: 'Liter' });
 // => { id, si, basesi, basesifactor, symbol, name }
 ```