[FIX] z -> s

[FIX] title 'optimisation' -> 'Optimisation'

[UX] British spelling: rename optimization → optimisation throughout code (conflict resolve)

[FEAT] Add OR-substitutable resource family pools and rename inputs.csv

[FEAT] Replace hardcoded tab intros and method disabled notes with ui_text.xlsx; fix slider negative min

[UX] tab6_scenarios.py: British spelling (optimization -> optimisation)

[UX] tab5_sensitivity.py: British spelling (optimization -> optimisation)

[UX] tab4_optimization.py: British spelling (Optimization -> Optimisation)

[UX] tab3_coefficients.py: British spelling (optimization -> optimisation)

[UX] tab2_constraints.py: British spelling (optimization -> optimisation)

[UX] tab1_inputs.py: British spelling (optimization -> optimisation)

[UX] tab0_welcome.py: British spelling (optimize -> optimise, optimization -> optimisation)

[FIX] Resolve percent caps against each method's standalone potential

[FIX] Fix cap value precision: show 4 decimal places in absolute cap inputs and displays across tab2, tab4, and data_utils

[FIX/FEAT] Move bottleneck analysis from tab4 to tab5, add chart interpretation captions to both tabs

[UX] address user feedback: per-year template text and column header, more visible "Add resource" button, fixed next-tab navigation on all pages, updated method constraints intro text

[FIX] welcome: update intro text for target audience, style 'Let's get started...' with gradient, add page bottom padding globally

[FIX] tab6: source resource list from resource_usage (not resource_caps) to include custom batches, fix resource usage computation, remove broken CSV export

[FIX] tab5: exclude zero-cap resources and inactive methods from sensitivity selectors, remove redundant session state guards

[FIX] tab4: fix heatmap zero-display for tiny values, remove unused imports and redundant session state inits

[REFACTOR] tab2: extract refresh_active_methods from _sync_constraint_widgets so it can be called without visiting Tab 2

[REFACTOR] tab1: replace apply_auto_disable_logic with refresh_active_methods, remove redundant resource_caps init

[FIX] tab3: add early return for zero-cap resources, simplify availability messages, remove unused has_custom_batch param

[FIX] app: initialize session state at app level to prevent crashes on direct tab navigation

[FIX] tab6: filter hidden Other resources, apply CRRA chart style, register chart data, fix tab name

[FIX] tab5: switch to run_expanded_optimization, filter hidden resources, expose Other method variants in method selector

[FIX] tab4: cap heatmap percentages at 100%, show percentages instead of exact values in chart data table

[FIX] tab2: deactivate methods whose resource is unchecked in the Tab 1 popover, fix status display (red) and hint text

[FEAT/FIX] tab1: add load/download standard resources buttons, fix stale costs on edit/delete/reset, increase number precision

[FIX] tab2: new resource batches now cover named standard resources, not only hidden "Other" ones

[FIX] method automatically activated

[FEAT/FIX] tab4: fix variant deactivation on ZIP reload, relocate helpers to utils, add persistent Reset tab

[REFACTOR] tab3: relocate normalize_costs, get_slider_params, is_method_enabled, is_custom_secondary to data_utils; show summary table even when no active method

[FEAT/FIX] tab2: unify method activatability check, fix hidden resource coverage by batch group, move default_constraint to data_utils

[REFACTOR] tab1: relocate utility functions, refactor dialog key management and group selector

[FEAT] adding a info/warning icon

[FIX] Replace info text with resource status expander and fix toggle instantiation bug for blocked methods

[FIX] Tab4: Deactivate methods with missing resources and fix batch coefficient injection for non-Other methods

[FIX] In the ‘Method Constraints’ tab: Disable and explain methods that require resources not added in the ‘Resource input’ tab

[FEAT] Expand Other-method variants in LP, fix scenario load widget sync and resource balance display

[FEAT/FIX] Tab3: adaptive slider precision, hide Other resources, show hidden secondary hints, filter inactive methods

[FEAT] Refactor tab2: widget sync (active method or not if resources added in tab1), type-switch reset, Other-method variants

[FIX] Hide Other resources in tab1, fix unit label (yr instead of year)

[FIX] Padding alert

[FIX] When a new resource row has min == max, it now displays the value as a fixed label instead of trying to render a slider.

[FIX] Add Available amout unit/year

[FEAT] Tab4: add Run tab + fix heatmap size + fix export tab reset

[FIX] Tab3: adapt zero-cap warning based on resource type

[FIX] The DataFrame is empty when no CDR method is selected.

[FEAT] Clarify the way users must input resources