**Steps to reproduce:**
* Install  `stock` module.
* Go to  Settings and enable: 
     * Storage Locations (Warehouse).
     * Batch, Wave & Cluster Transfers.
* Create a Product and set its on-hand quantity to 60.
* Go to Inventory → Configuration → Operation Types and create a new operation type:
     * Set Type of Operation to Internal Transfer.
     * In the Barcode App tab, enable Group batch lines.
* Go to Inventory → Operations → Internal Transfers and create a new transfer:
     * Select the newly created Operation Type.
     * Add the created Product with quantity 4.4.
     * Mark the transfer as To Do.
* Create another Internal Transfer with the same configuration:
     * Select the same Operation Type.
     * Add the same Product with quantity 48.8.
     * Mark the transfer as To Do.
* Open the Internal Transfers list view.
* Select both created transfers.
* Click Action → Add to Wave Transfer.
     * Choose A new Wave Transfer and confirm.
* In the popup, select both transfers and add them to the wave.
* Open the Barcode application.
* Open the created operation and select the Batch on the right side
to open the wave transfer in the barcode interface.

**Observed behavior:**
- The grouped line quantity is displayed as 53.99999996 instead of
the expected value(53.2).

**Cause:**
- When the Barcode app loads data,` _createState()` is executed,
which calls `groupLines()`.
- Inside this method, quantities are aggregated using standard
JavaScript floating-point addition:

https://github.com/odoo/enterprise/blob/08d0a7f480046bb489ca69e7b3535e99cb20eee5/stock_barcode_picking_batch/static/src/models/barcode_picking_batch_model.js#L204-L205

- Since JavaScript stores numbers as binary floating-point values,
decimals like 4.4 and 48.8 cannot be represented exactly.
Repeated additions accumulate precision errors, producing results
like 53.99999996 instead of 53.2.

**Fix:**
- Aggregate quantities using `formatFloat` with the barcode precision
before converting them back to floats

- `formatFloat` rounds the value according to the configured precision
of the barcode model, ensuring the intermediate result is normalized
after each addition. Converting the formatted value back with
`parseFloat` guarantees the stored number respects the expected
decimal precision and prevents floating-point accumulation errors.

---
opw-5932329

Forward-Port-Of: odoo/enterprise#114998
Forward-Port-Of: odoo/enterprise#110241

**Steps to reproduce:**
* Install modules: *mrp*, *purchase*, *sale_management*.
* Go to *Settings* and enable:
  * *Multi-Step Routes*
  * *Replenish on Order (MTO)*
  * *Dropshipping*
* Create a *Dropship* product:
  * Set route to *Dropship*.
  * Add a vendor under the *Purchase* tab.
* Create an *MTO* product:
  * Set route to *Replenish on Order (MTO)*.
  * Configure a *Bill of Materials (BoM)*.
* Create a *Sales Order*:
  * Add both products.
  * Confirm the order.
* Open the Sales Order:
  * Observe smart buttons for *Delivery*, *Purchase*, and *Manufacturing*.
* Open the linked *Purchase Order* and *Manufacturing Order*.

**Observed behavior:**
* The *Purchase Order* shows a smart button linking to a *Manufacturing Order*.
* The *Manufacturing Order* shows a smart button linking to a *Purchase Order*, even when unrelated.

**Expected behavior:**
* The *Purchase Order* should only show a smart button linking to the *Sales Order*.
* The *Manufacturing Order* should only show a smart button linking to the *Sales Order*.
* No cross-link between unrelated PO and MO should be displayed.

**Cause:**
* The SO pushes the `stock.reference` into procurement values: https://github.com/odoo/odoo/blob/8a871a120b75f7c09c70dbf07530239244dbb5d6/addons/sale_stock/models/sale_order_line.py#L289
* The same reference is propagated to:
  * Purchase Orders: https://github.com/odoo/odoo/blob/8a871a120b75f7c09c70dbf07530239244dbb5d6/addons/purchase_stock/models/stock_rule.py#L355
  * Manufacturing Orders: https://github.com/odoo/odoo/blob/8a871a120b75f7c09c70dbf07530239244dbb5d6/addons/mrp/models/stock_rule.py#L184

* Opening the *Purchase Order* form triggers `_compute_mrp_production_count`.
* This compute calls `_get_mrp_productions()`: https://github.com/odoo/odoo/blob/8a871a120b75f7c09c70dbf07530239244dbb5d6/addons/purchase_mrp/models/purchase.py#L21
* That method returns `self.reference_ids.production_ids`.
* Since the MO shares the same sale reference, the PO incorrectly fetches that MO and shows the *Manufacturing* smart button.

* Similarly, opening the *Manufacturing Order* form triggers `_compute_purchase_order_count`.
* This compute calls `_get_purchase_orders()`, which returns `self.reference_ids.purchase_ids`.
* Since the dropship PO shares the same sale reference, the MO incorrectly fetches that PO and shows the *Purchase* smart button.

**Fix:**
* Stop relying on shared `reference_ids` to compute links.
* Instead, follow the actual stock and procurement chain:
  * For *MO → PO*:
    * Use raw material moves to find related purchase lines: `self.move_raw_ids.created_purchase_line_ids.order_id | self.move_raw_ids.purchase_line_id.order_id`
  * For *PO → MO*:
    * Use stock move destinations to identify consuming productions.
* This ensures:
  * MOs link only to POs supplying their raw materials.
  * POs link only to MOs they actually replenish.
  * Unrelated documents sharing the same sale reference remain isolated.

---
opw-6008943

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Description of the issue/feature this PR addresses:

Current behavior before PR:

Desired behavior after PR is merged:




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I confirm I have signed the CLA and read the PR guidelines at www.odoo.com/submit-pr

Forward-Port-Of: odoo/odoo#254292