Make the projection system generic (phases 1–5 + follow-ups)

.swiftformat

@@ -0,0 +1,134 @@
+--acronyms ID,URL,UUID
+--allman false
+--allow-partial-wrapping false
+--anonymous-for-each convert
+--asset-literals visual-width
+--async-capturing 
+--before-marks 
+--binary-grouping 4,8
+--blank-line-after-switch-case multiline-only
+--call-site-paren same-line
+--category-mark "MARK: %c"
+--class-threshold 0
+--closing-paren default
+--closure-void remove
+--complex-attributes preserve
+--computed-var-attributes preserve
+--conditional-assignment after-property
+--conflict-markers reject
+--date-format system
+--decimal-grouping 3,6
+--default-test-suite-attributes 
+--doc-comments before-declarations
+--else-position next-line
+--empty-braces no-space
+--enum-namespaces always
+--enum-threshold 0
+--equatable-macro none
+--exponent-case lowercase
+--exponent-grouping disabled
+--extension-acl on-declarations
+--extension-mark "MARK: - %t + %c"
+--extension-threshold 0
+--file-macro "#file"
+--fraction-grouping disabled
+--fragment false
+--func-attributes preserve
+--generic-types 
+--group-blank-lines true
+--grouped-extension "MARK: %c"
+--guard-else auto
+--guard-like-if-statements preserve
+--header ignore
+--hex-grouping 4,8
+--hex-literal-case uppercase
+--ifdef no-indent
+--import-grouping alpha
+--indent 4
+--indent-blank-lines false
+--indent-case false
+--indent-strings false
+--inferred-types always
+--init-coder-nil false
+--lifecycle 
+--line-after-marks true
+--line-between-guards false
+--linebreaks lf
+--list-wrap-threshold none
+--mark-categories true
+--mark-class-threshold 0
+--mark-enum-threshold 0
+--mark-extension-threshold 0
+--mark-extensions always
+--mark-struct-threshold 0
+--mark-types always
+--markdown-files ignore
+--max-width none
+--modifier-order 
+--never-trailing 
+--nil-init remove
+--no-space-operators 
+--no-wrap-operators 
+--non-complex-attributes 
+--octal-grouping 4,8
+--operator-func spaced
+--organization-mode visibility
+--organize-types actor,class,enum,struct
+--pattern-let hoist
+--prefer-synthesized-init-for-internal-structs never
+--preserve-acronyms 
+--preserve-decls 
+--preserved-property-types Package
+--property-types infer-locals-only
+--ranges spaced
+--redundant-async tests-only
+--redundant-optional-binding same-name-only
+--redundant-throws tests-only
+--self init-only
+--self-required 
+--semicolons inline-only
+--short-optionals except-properties
+--single-line-for-each ignore
+--single-line-ternary convert
+--smart-tabs enabled
+--some-any true
+--sort-swiftui-properties none
+--sorted-patterns 
+--stored-var-attributes preserve
+--strip-unused-args always
+--struct-threshold 0
+--suite-name-format preserve
+--tab-width unspecified
+--test-case-access-control internal
+--test-case-name-format raw-identifiers
+--throw-capturing 
+--timezone system
+--trailing-closures 
+--trailing-commas always
+--trim-whitespace always
+--type-attributes prev-line
+--type-blank-lines insert
+--type-body-marks preserve
+--type-delimiter space-after
+--type-mark "MARK: - %t"
+--type-marks 
+--type-order 
+--url-macro none
+--visibility-marks 
+--visibility-order 
+--void-type Void
+--wrap-arguments before-first
+--wrap-collections before-first
+--wrap-conditions preserve
+--wrap-effects never
+--wrap-enum-cases with-values
+--wrap-parameters before-first
+--wrap-return-type never
+--wrap-string-interpolation false
+--wrap-ternary before-operators
+--wrap-type-aliases before-first
+--xcode-indentation enabled
+--xctest-symbols 
+--yoda-swap always
+--disable trailingClosures,unusedArguments,preferExplicitFalse
+--enable blankLineAfterSwitchCase,blankLinesAfterGuardStatements,blockComments,isEmpty,preferContains,preferCountWhere,preferFirstWhere,preferFlatMap,preferLazyMap,preferMinOverSorted,preferSwiftStringAPI,preferSwiftTesting,singlePropertyPerLine,sortSwitchCases,unusedPrivateDeclarations,wrapEnumCases,wrapMultilineConditionalAssignment,wrapMultilineFunctionChains

AGENTS.md

@@ -173,7 +173,14 @@ When a function **call** is split across multiple lines, place each argument on
 ## General instructions
 
 - DO NOT take any shortcuts while implementing an algorithm. Correctness is the highest priority
-- DO NOT commit changes unless the user tells you to do so, ALWAYS let the user review your changes
+
+## NEVER COMMIT OR PUSH WITHOUT THE USER'S EXPLICIT REVIEW — THIS IS THE HIGHEST PRIORITY RULE IN THIS FILE
+
+- **NEVER commit without the user having explicitly reviewed the changes.** Not once, not "just this once", not even when the user asks for a PR implicitly or you believe they'd want it. Zero exceptions without a direct instruction.
+- **NEVER push** to any remote without the user's explicit, per-action consent — this includes branch moves, force-pushes, and pushes done as part of "creating a PR".
+- **ALWAYS leave changes uncommitted** in the working tree for review. Let the user run `git add`/`git commit`/`git push` themselves, or explicitly grant permission.
+- **When in ANY doubt, ask first.** A wrongly published change cannot be unpublished; a delayed commit costs nothing. This has caused real problems before (public review-bypass, lost user control); treat every `git commit`, `git push`, and `gc` remote action as requiring an unambiguous "yes, commit/push" from the user.
+- An explicit user request to commit applies **only to that request** — never carry permission forward into follow-up turns; each new task starts back at "working tree only".
 - DO NOT create free functions (un-namespaced top-level functions). Always use a `private enum` namespace or extensions on existing types.
 - Code MUST compile cleanly, with no warnings
 - New algorithms and bug fixes MUST include tests for all projections (EPSG:4326, EPSG:3857, EPSG:4978, noSRID)