Fix/mooclet priors

[danoswaltCL]

Apologies for giant PR, i got carried away

• Adds a proper entry for priors per condition in the design page
• Removes priors from overview and upsert experiment modal
• Adds Reward Feedback Table improvements to show count, priors, posteriors, and estimated weight
• Estimated weight is a new feature itself, the language of the tooltip explains it:
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[Copilot]

Pull request overview

This PR shifts Thompson-sampling priors from a single global setting to per-condition priors, updates the experiment design UI accordingly, and enhances the reward feedback table to display priors/posteriors plus an “estimated weight” metric computed via Thompson-sampling simulation.

Changes:

• Add per-condition prior editing via a new modal and wire it into the experiment conditions table/section.
• Revamp the TS reward feedback table to show counts, priors, posteriors, and an estimated weight with explanatory tooltips.
• Backend/types updates to support per-condition priors and to return additional reward-summary fields used by the UI.

Reviewed changes

Copilot reviewed 28 out of 28 changed files in this pull request and generated 10 comments.

Show a summary per file

File	Description
packages/types/src/index.ts	Re-export Prior / CurrentPosteriors from the types package.
packages/types/src/Mooclet/index.ts	Extend rewards summary shape (add priors/posteriors/estimated weight fields; remove total).
packages/types/src/Mooclet/MoocletTSConfigurablePolicyParametersDTO.ts	Change prior to an optional per-key map (Record<string, Prior>).
packages/frontend/projects/upgrade/src/assets/i18n/en.json	Add new labels/tooltips for prior editing + estimated weight columns.
packages/frontend/projects/upgrade/src/app/shared/services/common-dialog.service.ts	Add dialog opener for the new “edit condition prior” modal.
packages/frontend/projects/upgrade/src/app/features/.../ts-configurable-reward-count-table.component.ts	Add estimated-weight tooltip logic + new displayed columns.
packages/frontend/projects/upgrade/src/app/features/.../ts-configurable-reward-count-table.component.html	Update reward table columns to show priors/posteriors and estimated weight tooltips.
packages/frontend/projects/upgrade/src/app/features/.../ts-configurable-reward-count-table.component.scss	Update reward table column sizing/styling for new columns.
packages/frontend/projects/upgrade/src/app/features/.../enrollment-condition-expandable-row.component.{html,scss}	Hide “weight” column content for Mooclet experiments in enrollment expandable row.
packages/frontend/projects/upgrade/src/app/features/.../experiment-conditions-table.component.ts	Add prior input + columns/events for prior display/edit.
packages/frontend/projects/upgrade/src/app/features/.../experiment-conditions-table.component.html	Render prior successes/failures columns and add an edit-prior button.
packages/frontend/projects/upgrade/src/app/features/.../experiment-conditions-table.component.scss	Add styling for prior/prior-edit columns.
packages/frontend/projects/upgrade/src/app/features/.../experiment-conditions-section-card.component.ts	Wire prior-edit event to dialog + store update.
packages/frontend/projects/upgrade/src/app/features/.../experiment-conditions-section-card.component.html	Pass priors into the conditions table and bind edit-prior output.
packages/frontend/projects/upgrade/src/app/features/.../ts-configurable-policy-parameters-form.component.{ts,html}	Remove global prior inputs from the experiment upsert modal form.
packages/frontend/projects/upgrade/src/app/features/.../edit-condition-prior-modal/*	New modal implementation for editing per-condition priors.
packages/frontend/projects/upgrade/src/app/core/experiments/store/experiments.model.ts	Remove prior labels from TS-configurable overview labels.
packages/frontend/projects/upgrade/src/app/core/experiments/mooclet-helper.service.ts	Remove global prior handling; add validators for per-condition prior inputs.
packages/frontend/projects/upgrade/src/app/core/experiments/mooclet-helper.service.spec.ts	Update tests to reflect removal of global prior fields in helper logic.
packages/frontend/projects/upgrade/src/app/core/experiments/experiments.service.ts	Add store update helper for per-condition priors.
packages/backend/src/api/services/estimate.ts	New Thompson-weight estimation helper (currently unused).
packages/backend/src/api/services/MoocletRewardsService.ts	Fetch policy params and include priors/posteriors/estimated weight in rewards summary response.
packages/backend/src/api/services/MoocletExperimentService.ts	Translate prior keys between condition codes and Mooclet version IDs on GET/PUT.
packages/backend/test/unit/services/MoocletRewardsService.test.ts	Update expected reward summary shape for the new fields.

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[danoswaltCL]

#3093 is the new one